BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//INPA - ECPv6.8.3//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:INPA
X-ORIGINAL-URL:https://inpa.lbl.gov
X-WR-CALDESC:Events for INPA
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:America/Los_Angeles
BEGIN:DAYLIGHT
TZOFFSETFROM:-0800
TZOFFSETTO:-0700
TZNAME:PDT
DTSTART:20200308T100000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0700
TZOFFSETTO:-0800
TZNAME:PST
DTSTART:20201101T090000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201106T120000
DTEND;TZID=America/Los_Angeles:20201106T130000
DTSTAMP:20260403T211032
CREATED:20201102T170620Z
LAST-MODIFIED:20201102T170620Z
UID:908-1604664000-1604667600@inpa.lbl.gov
SUMMARY:VIRTUAL INPA SEMINAR | Julieta Gruszko (UNCCH)
DESCRIPTION:Speaker: Julieta Gruszko (University of North Carolina at Chapel Hill) \nTitle: Shedding ‘Nu’ Light on the Nature of Matter: NuDot and the Search for Majorana Neutrinos \n\nAbstract: \nWhy is the universe dominated by matter\, and not antimatter? Neutrinos\, with their changing flavors and tiny masses\, could provide an answer. If the neutrino is its own antiparticle\, it would reveal the origin of the neutrino’s mass\, demonstrate that lepton number is not a conserved symmetry of nature\, and provide a path to leptogenesis in the early universe. To discover whether this is the case\, we must search for neutrinoless double-beta decay. As the upcoming ton-scale generation of experiments is built\, it is key that research and development (R&D) efforts continue to explore how to extend experimental sensitivities to 10^29 years and beyond. These next-next-generation experiments could make a discovery\, if neutrinoless double-beta decay is not found at the ton-scale\, or offer insight into the mechanism behind lepton number violation\, if it is. NuDot is a proof-of-concept liquid scintillator experiment that will explore new techniques for isotope loading and background rejection infuture detectors. I’ll discuss the progress we’ve already made in demonstrating how previously-ignored Cherenkov light signals can help us distinguish signal from background\, and the technologies we’re developing with an eye towards the coming generations of experiments. \nJoin Zoom Meeting \nhttps://lbnl.zoom.us/j/91339017890?pwd=UGo0NzVWSVA3SjU0Y3JlWitMZDFldz09 \nMeeting ID: 913 3901 7890 \nPasscode: 625950 \nAbstract: https://inpa.lbl.gov/2020/11/02/virtual-inpa-sem…ta-gruszko-uncch/
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-julieta-gruszko-uncch/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201030T120000
DTEND;TZID=America/Los_Angeles:20201030T130000
DTSTAMP:20260403T211032
CREATED:20201026T152731Z
LAST-MODIFIED:20201026T152731Z
UID:903-1604059200-1604062800@inpa.lbl.gov
SUMMARY:VIRTUAL INPA SEMINAR | Livia Ludhova (RWTH)
DESCRIPTION:Speaker: Livia Ludhova (RWTH Aachen/Forschungszentrum Jülich)\n \n\n\nTitle: JUNO: the first multi-kton liquid scintillator based neutrino detector\n \nAbstract:  \nThe Jiangmen Underground Neutrino Observatory (JUNO) is a neutrino experiment under construction in a 700 m deep underground laboratory near Jiangmen in South China. The detector main component will be 20 kton of liquid scintillator held in a spherical acrylic vessel. The experiment is designed for the determination of the neutrino mass ordering\, one of the open key questions in neutrino physics. This measurement will be based on the observation of vacuum oscillation of antineutrinos from two nuclear power plants at 53 km baseline. A key ingredient for the success is an excellent and extremely challenging energy resolution of 3% at 1 MeV. The light produced by the scintillator will be seen by about 20\,000 large PMTs (20”) and about 25\,000 small PMTs (3”). The OSIRIS detector will monitor the radio-purity of the liquid scintillator during the months-long filling of the main detector\, while the unoscillated spectrum from one reactor core is planned to be closely monitored by the Taishan Antineutrino Observatory (TAO). JUNO will also measure several neutrino oscillation parameters with unprecedented sub-percent precision. Astrophysical measurements of solar\, geo\, supernova\, DSNB\, atmospheric neutrinos\, as well as searches for proton decay or dark matter are also a part of the vast physics programme. The seminar will review the physics goals\, design\, as well as the status of the JUNO project.\n\nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/95227577412?pwd=bHdqOGVKSTlzaEdUbXF3emt1UGZ1dz09 \nMeeting ID: 952 2757 7412\nPasscode: 927741
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-livia-ludhova-rwth/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201023T120000
DTEND;TZID=America/Los_Angeles:20201023T130000
DTSTAMP:20260403T211032
CREATED:20201016T140642Z
LAST-MODIFIED:20201016T141041Z
UID:895-1603454400-1603458000@inpa.lbl.gov
SUMMARY:VIRTUAL INPA SEMINAR | Sukanya Chakrabarti (RIT)
DESCRIPTION:Speaker: Sukanya Chakrabarti (Rochester Institute Technology) \nTitle: Measuring Accelerations— Near & Far \nAbstract: \nRecent technological advances and observational programs now make it possible for us to directly measure the Galactic acceleration experienced by stars within the Milky Way. I will discuss the traditional method of estimating Galactic accelerations and thereby the Oort limit (from which one determines the local dark matter density given the baryon budget)\, which uses kinematical estimates that can be inaccurate especially in parts of the Galaxy that are significantly perturbed. I will then discuss our method in using extreme precision radial velocity observations to measure the Galactic acceleration\, and ongoing observational programs. I will also use compiled pulsar timing data to directly measure the Galactic acceleration\, which gives us the Oort limit from the Poisson equation without making assumptions of equilibrium or spherical symmetry (as in kinematic estimates). Given the Oort limit\, we then determine the local dark matter density\, which has implications for direct detection experiments. I will discuss the potential for measuring dark matter sub-structure in the Milky Way with pulsar timing\, and for constraining theories of gravity by combining constraints from pulsar timing and extreme precision radial velocity measurements. Finally\, I will end by discussing prospects for measuring the cosmic acceleration. \nJoin Zoom Meeting \nhttps://lbnl.zoom.us/j/93826947056?pwd=Q3hGOVpBSVhQcDZqS2plaitYQVB6dz09 \nMeeting ID: 938 2694 7056 \nPasscode: 123733 
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-sukanya-chakrabarti-rit/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201016T120000
DTEND;TZID=America/Los_Angeles:20201016T130000
DTSTAMP:20260403T211032
CREATED:20201002T073850Z
LAST-MODIFIED:20201009T163927Z
UID:887-1602849600-1602853200@inpa.lbl.gov
SUMMARY:VIRTUAL INPA SEMINAR | Kev Abazajian (UC Irvine) 
DESCRIPTION:Speaker: Kev Abazajian (UC Irvine) \n\n \n\n\nTitle: Arising and demising candidate dark matter signals on the sky\, and the potential of future searches\n \nAbstract: \nNew  technologies searching are observing the high-energy Universe with unprecedented detail. One of the primary goals of gamma-ray and X-ray astronomy has been the search for potential signals of dark matter that could be at the keV to GeV energy scales. The past 10 years have had two candidate signals in both energy regimes\, which are both high energy but separated by a factor of 1 million: the ~3 GeV excess from the Milky Way Galactic Center\, and the 3-55 keV line detected in several X-ray observations. I will discuss the saga of these signals and future prospects from the keV to TeV scales.\n\n\nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/93708191260  \nMeeting ID: 937 0819 1260\nPasscode: 521406
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-kev-abazajian-uc-irvine/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201009T120000
DTEND;TZID=America/Los_Angeles:20201009T130000
DTSTAMP:20260403T211032
CREATED:20201002T072906Z
LAST-MODIFIED:20201104T225634Z
UID:883-1602244800-1602248400@inpa.lbl.gov
SUMMARY:VIRTUAL INPA SEMINAR | Scott Kravitz (LBNL)
DESCRIPTION:Speaker: Scott Kravitz (LBNL) \n \n\n\nTitle: CrystaLiZe – Solid Xenon Detector R&D\n \nAbstract: \nRadon and its daughter decays limit the sensitivity of direct WIMP dark matter searches\, despite extensive screening programs\, careful material selection and specialized Rn-reduction systems. For xenon time projection chambers\, a means to surpass this constraint may lie in crystallizing the xenon. In a solid matrix\, each of the decay steps surrounding the problematic radon daughter beta decay isotopes could be vetoed at the fixed position of the decay sequence. The constraint of time structure in the sequence could allow veto efficiency to approach 100%\, with minimal effect on acceptance. In this case\, the limiting background for WIMP searches would be neutrinos from the sun and from cosmic ray muons. It is additionally hypothesized that crystalline xenon may offer improved particle discrimination compared with liquid. In this talk\, I will argue that an instrumental radon tag in a crystalline xenon TPC may be the quickest path to reaching the neutrino floor and present preliminary results from a test stand which suggest that solid Xe is a viable particle detection medium.\n\nThe video for this talk will be posted:\nhttps://physicstalks.lbl.gov/Public/2020/rpm/ScottKravitz0.html\n\n\nJoin Zoom Meeting \nhttps://us04web.zoom.us/j/76619726361?pwd=Q2NRUHkzK0NZYUtLUWJIK2dEUzVhQT09\n\n\nMeeting ID: 766 1972 6361\n\n\nPasscode: 023744
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-scott-kravitz-lbnl/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201002T120000
DTEND;TZID=America/Los_Angeles:20201002T130000
DTSTAMP:20260403T211032
CREATED:20200917T153008Z
LAST-MODIFIED:20200928T162953Z
UID:877-1601640000-1601643600@inpa.lbl.gov
SUMMARY:VIRTUAL INPA SEMINAR – Adrien Hourlier (MIT)
DESCRIPTION:Speaker: Adrien Hourlier (MIT) \nTitle: MiniBooNE Oscillation Results with Complete Dataset \nAbstract: \nThe MiniBooNE experiment\, located on the Booster Neutrino Beamline at Fermilab\, reports a total excess of 638.0+/-132.8 electron-like events (4.8σ) from a data sample corresponding to 18.75×10^20 protons-on-target in neutrino mode\, which is a 46% increase in the data sample with respect to previously published results\, and 11.27 × 10^20 protons-on-target in antineutrino mode. The additional statistics allow several studies to address questions on the source of the excess. I will discuss how we can use distributions such as beam timing and the radial distribution to disfavor some of the possible explanation for the source of the excess such as an excess of entering or exiting photons. \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/94852394075?pwd=cEFONlJ6UEVnRVBSU2liSnlIL0VhQT09 \nMeeting ID: 948 5239 4075\nPasscode: 295449
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-adrien-hourlier-mit/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200925T120000
DTEND;TZID=America/Los_Angeles:20200925T130000
DTSTAMP:20260403T211032
CREATED:20200916T022134Z
LAST-MODIFIED:20200916T022134Z
UID:872-1601035200-1601038800@inpa.lbl.gov
SUMMARY:VIRTUAL INPA SEMINAR | Stephane Zsoldos (UCB)
DESCRIPTION:Speaker: Stephane Zsoldos (UC Berkeley) \nTitle: An overview of the Hyper-Kamiokande experiment \nAbstract: \nHyper-Kamiokande\, which started construction in April 2020\, is a next generation underground water Cherenkov detector\, based on the highly successful Super-Kamiokande experiment. It will serve as a far detector\, 295 km away\, of a long baseline neutrino experiment for the upgraded J-PARC beam in Japan. It will also be a detector capable of observing — far beyond the sensitivity of the Super-Kamiokande detector — proton decay\, atmospheric neutrinos\, and neutrinos from astronomical sources. \nAlthough a wide and rich research program for neutrinos at both low and high-E\, I will\, after introducing and reviewing the general status of the experiment\, focus on the oscillation physics\, especially on the two main unanswered questions\, the hierarchy of the neutrino mass eigenstates and the value of the leptonic delta CP phase. Especially\, I will discuss Hyper-Kamiokande’s sensitivity using a joint atmospheric and accelerator fit to unravel part of these interrogations. \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/96424252212?pwd=bzVXMm5rN2thVUFKMnNNdG1FUUpPQT09 \nMeeting ID: 964 2425 2212\nPasscode: 974805
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-stephane-zsoldos-ucb/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200918T120000
DTEND;TZID=America/Los_Angeles:20200918T130000
DTSTAMP:20260403T211032
CREATED:20200909T004925Z
LAST-MODIFIED:20200909T004925Z
UID:867-1600430400-1600434000@inpa.lbl.gov
SUMMARY:VIRTUAL INPA SEMINAR – Stefan Schoppmann (UC Berkeley)
DESCRIPTION:Speaker: Stefan Schoppmann (UC Berkeley)\n\n\nTitle: the STEREO Experiment: Search for Sterile Neutrinos \nAbstract: In recent years\, two unsolved anomalies have appeared from the study of reactor neutrinos: the reactor antineutrino anomaly being related to the absolute neutrino flux\, and the energy spectral shape anomaly. By conducting measurements of reactor neutrinos at very short baselines from a highly enriched uranium reactor\, both anomalies can be addressed simultaneously. \nSTEREO is a liquid-scintintillator-based experiment located at a short ~10 m baseline from the ILL research reactor in Grenoble\, France. Its primary objective is the search for energy and baseline dependent disappearance patterns of reactor neutrinos\, which would indicate that the reactor antineutrino anomaly could be caused by neutrino oscillations towards sterile neutrinos. Its second objective is to investigate whether highly enriched uranium reactors show the same energy spectral distortions of neutrinos as lowly enriched reactors. Due to the small overburden of 15 m.w.e. and the high ambient neutron flux in the reactor hall\, STEREO’s scintillator has to meet special requirements in terms of particle identification and discrimination. \nIn this presentation\, latest results of the STEREO experiment regarding its oscillation\, absolute rate\, and spectral shape analyses using 179 days of reactor-on data are discussed. A highlight is set on STEREO’s liquid scintillator and its particle ID capabilities. \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/99615784061?pwd=Q2tTcFplMDNuQzFjU0I1N3B5N1Nxdz09 \nMeeting ID: 996 1578 4061\nPasscode: 884122
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-stefan-schoppmann-uc-berkeley/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200731T120000
DTEND;TZID=America/Los_Angeles:20200731T130000
DTSTAMP:20260403T211032
CREATED:20200728T143646Z
LAST-MODIFIED:20200728T143744Z
UID:859-1596196800-1596200400@inpa.lbl.gov
SUMMARY:VIRTUAL INPA SEMINAR –  Jared Vann (Univ. of Liverpool)
DESCRIPTION:Speaker: Jared Vann (University of Liverpool) \nTitle: ARIADNE: Fast Optical Readout of Dual-Phase LArTPCs with Timepix3 Cameras \nAbstract: The ARIADNE experiment is a 1-ton dual-phase LArTPC with a novel optical readout method developed for applications in future Neutrino detectors. Optical readout is a potential alternative to existing charge based readouts in dual phase LArTPCs. The method was first shown to work by the ARIADNE experiment using CCD cameras. Now with extremely fast Timepix3 Cameras we can demonstrate full 3D readout with excellent resolution and calorimetry information. \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/92513817972?pwd=MzhqWHptbzgxQVorRTlUTk45S1ZZQT09 \nMeeting ID: 925 1381 7972\nPasscode: 343374
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-jared-vann-univ-of-liverpool/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200724T120000
DTEND;TZID=America/Los_Angeles:20200724T130000
DTSTAMP:20260403T211032
CREATED:20200702T123958Z
LAST-MODIFIED:20200720T143748Z
UID:841-1595592000-1595595600@inpa.lbl.gov
SUMMARY:VIRTUAL INPA SEMINAR – Gioacchino Ranucci (INFN) Italy
DESCRIPTION:Speaker: Gioacchino Ranucci (INFN) Italy \nTitle: First detection of solar neutrinos from the CNO cycle with Borexino \nAbstract: The liquid scintillator detector Borexino reported recently the direct observation of neutrinos produced in the carbon-nitrogen-oxygen (CNO) fusion cycle in the Sun. This is the first experimental evidence of the existence of such reaction sequence in a star. The CNO solar neutrino interaction rate is 7.2 +3.0 −1.7 counts per day per 100 tons of target at 68% C.L.\, corresponding to a flux of neutrinos on Earth of 7.0 +3.0 −2.0 ×108 cm−2 s −1. The absence of CNO signal is disfavored at 5.0σ. In this seminar\, I will describe the technological effort to stabilize the detector and understand the background\, which is at root of this achievement\, together with the main features of the analysis procedure exploited to extract the CNO signal. \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/96603938296?pwd=UWZERUphMlVqS0hReVozQ2dFdjU1dz09 \nMeeting ID: 966 0393 8296\nPasscode: 484158
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-gioacchino-ranucci-infn-italy/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200724T100000
DTEND;TZID=America/Los_Angeles:20200724T110000
DTSTAMP:20260403T211032
CREATED:20200722T215316Z
LAST-MODIFIED:20200722T215316Z
UID:855-1595584800-1595588400@inpa.lbl.gov
SUMMARY:SPECIAL VIRTUAL INPA SEMINAR – Geertje Heuermann (Karlsruhe Institute of Technology)
DESCRIPTION:Speaker: Geertje Heuermann (Karlsruhe Institute of Technology) \nTitle: Active Shielding for Future Large-Scale Dark Matter Experiments\n \nAbstract: In this talk I will present the conceptual design of a water Cherenkov detector and a loaded liquid scintillator which effectively allow to reduce cosmogenic and radiogenic background sources in tonne scale dark matter detectors. \nJoin Zoom Meeting https://lbnl.zoom.us/j/94627104366?pwd=K09lTTBHdk5UVEw1cm1EOEVxVU05QT09 \nMeeting ID: 946 2710 4366  \nPasscode: 808254
URL:https://inpa.lbl.gov/event/special-virtual-inpa-seminar-geertje-heuermann-karlsruhe-institute-of-technology/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200717T120000
DTEND;TZID=America/Los_Angeles:20200717T130000
DTSTAMP:20260403T211032
CREATED:20200710T224830Z
LAST-MODIFIED:20200717T165436Z
UID:846-1594987200-1594990800@inpa.lbl.gov
SUMMARY:VIRTUAL INPA SEMINAR – Hao Chen (Texas A&M University)
DESCRIPTION:Speaker: Hao Chen (Texas A&M University) \nTitle: Two New Cryogenic Detector R&D \nAbstract: It is well-accepted that the majority of the matter in the universe is dark and non-baryonic. The nature of dark matter\, however\, remains mysterious. Various proposed candidates span a wide range in the mass and cross section parameter space. Many experimental efforts have been made aiming to detect dark matter particles directly\, part of the region in the parameter space has been excluded from their data. Probing the lower mass region requires a low threshold detection technique. I will talk about two new cryogenic detectors that are currently under development. The magnetic bubble chamber utilizes a single-molecule magnet as the target\, amplifying the signal from a scattering event by magnetic avalanches. The phonon-mediated high-voltage detector combines features of CDMS iZip and HV detector\, provides a possible way to achieve a low threshold without losing the electron recoil/nuclear recoil discrimination. \nCORRECTION Updated meeting ID and password information \nJoin Zoom Meeting https://lbnl.zoom.us/j/96636700595?pwd=bWcvZU9MQmdYdzE1YzNrZXdROElJQT09 \nMeeting ID: 966 3670 0595  \nPassword: 419873
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-hao-chen-texas-am-university/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200717T100000
DTEND;TZID=America/Los_Angeles:20200717T110000
DTSTAMP:20260403T211032
CREATED:20200702T122506Z
LAST-MODIFIED:20200717T143627Z
UID:837-1594980000-1594983600@inpa.lbl.gov
SUMMARY:VIRTUAL SEMINAR Special INPA / Research Progress Meeting\, Friday\, July 17\, 2020 – Michelle Galloway (University of Zurich)
DESCRIPTION:Speaker: Michelle Galloway (University of Zurich) \nTitle: Observation of excess electronic recoil events in XENON1T \nAbstract: A search for new physics with XENON1T revealed an excess of electronic recoil events in the (1 – 7) keV region\, favoring signal over background with significances of 3.5 sigma for solar axions/ALPs\, 3.2 sigma for an enhanced neutrino magnetic moment\, and 3.0 sigma global (4.0 local) for bosonic dark matter with a peak at 2.3 +- 0.2 keV (68% C.L.). Additionally\, a previously undetected tritium component\, favoured at 3.2 sigma over known backgrounds\, can neither be confirmed nor excluded. I will provide an overview of the XENON1T detection and analysis methods for this search\, a characterization of the excess events\, and present results for both possible backgrounds and potential new physics. \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/98002426771?pwd=R3dtTFhmb0ZyR0ZHV1E5amZCcnFBZz09 \nMeeting ID: 980 0242 6771\nPassword: 531232
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-michelle-galloway-university-of-zurich/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200629T120000
DTEND;TZID=America/Los_Angeles:20200629T130000
DTSTAMP:20260403T211032
CREATED:20200622T064642Z
LAST-MODIFIED:20200622T064642Z
UID:833-1593432000-1593435600@inpa.lbl.gov
SUMMARY:SPECIAL VIRTUAL INPA SEMINAR – Benjamin Schmidt (LBNL)
DESCRIPTION:Speaker: Benjamin Schmidt (LBNL) \nTitle: A new limit from the search for 0νββ of 100Mo from the CUPID-Mo experiment\n \nAbstract: The CUPID-Mo experiment\, currently taking data at the Laboratoire Souterrain de Modane (France)\, is a demonstrator for CUPID\, the next-generation upgrade of the first ton-scale cryogenic 0νββ-search\, CUORE. The experiment is searching for 0νββ decay of 100Mo with an array of 20 enriched ~0.2 kg Li2MoO4 crystals. The detectors are operated deep under the Frejus mountain at a depth of 4800 m.w.e. in a dilution refrigerator at ~20 mK. They are complemented by cryogenic Ge light detectors allowing us to distinguish alpha from beta/gamma events by the detection of both heat and scintillation light signals. With a bolometric performance of ~ 7 keV energy resolution (FWHM) at 2615 keV\, full alpha-to-beta/gamma separation and excellent radio-purity levels\, we operate in the background free regime. For the present analysis\, we consider more than one year of data acquired between March 2019 and April 2020. With 2.17 kg x yr of exposure and a high analysis efficiency of ~ 90%\, we are able to set a new world leading limit for 0νββ decay of 100Mo. In this seminar\, I will present the details of the analysis\, the new limit and I will conclude with an outlook on the end of CUPID-Mo data taking in July 2020 and further upcoming analyses. \nJoin Zoom Meeting \nhttps://lbnl.zoom.us/j/99340201217?pwd=eEJFSW9BN3pscm1FdDZ3cVpUODBoZz09 \nMeeting ID: 993 4020 1217 \nPassword: 211618 
URL:https://inpa.lbl.gov/event/special-virtual-inpa-seminar-benjamin-schmidt-lbnl/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200626T120000
DTEND;TZID=America/Los_Angeles:20200626T130000
DTSTAMP:20260403T211032
CREATED:20200616T190948Z
LAST-MODIFIED:20200616T190948Z
UID:831-1593172800-1593176400@inpa.lbl.gov
SUMMARY:VIRTUAL INPA Seminar - Matthew Szydagis (UALbany)
DESCRIPTION:Speaker: Matthew Szydagis (UALbany) \nTitle: The Road to Discovering Sub-GeV Dark Matter Using Supercooled Liquids \nAbstract:The latest developments in the search for low-mass dark matter with the snowball chamber technology\, essentially a reverse bubble chamber using supercooled water instead of superheating\, will be presented. The latest calibration data sets with neutron and gamma-ray radioactive calibration sources will be discussed\, with implications reviewed on the extremely low energy threshold expected (sub-keV) and background discrimination as a function of thermodynamic conditions. The most recent three-dimensional image analysis will be shown with position reconstruction and multiple scattering. Information gathered from all prototypes will be analyzed together to form a projected sensitivity curve for both spin-independent and spin-dependent (proton) coupling. \nJoin Zoom Meeting \nhttps://lbnl.zoom.us/j/99047273608 \nMeeting ID: 990 4727 3608
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-matthew-szydagis-ualbany/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200619T110000
DTEND;TZID=America/Los_Angeles:20200619T120000
DTSTAMP:20260403T211032
CREATED:20200521T100857Z
LAST-MODIFIED:20200615T152551Z
UID:819-1592564400-1592568000@inpa.lbl.gov
SUMMARY:VIRTUAL INPA SEMINAR – Bradley Kavanagh (IFCA - Spain)
DESCRIPTION:Speaker: Bradley Kavanagh (IFCA – Spain) \nTitle: Detection Dark Matter around Black Holes with Gravitational Waves \nAbstract: The observation of Gravitational Waves (GWs) has opened up a whole new avenue for constraining and detecting particle Dark Matter (DM). One of the most promising systems to study is the Intermediate Mass Ratio Inspiral (IMRI): a stellar-mass compact object such as a neutron star inspiraling towards an intermediate mass black hole\, thousands of times more massive than the Sun. Sub-hertz GWs emitted during the inspiral should be detectable by future space-based observatories such as LISA. But the presence of DM in the system can have subtle dynamical effects on the inspiral\, altering the waveform and hopefully allowing us to map out the DM distribution. I will discuss ongoing work to study these systems carefully and self-consistently\, in order to determine whether such a signal can be detected and what we can learn about Dark Matter if it is. \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/95929756869 \nMeeting ID: 959 2975 6869
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-bradley-kavanagh-ifca-spain/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200612T120000
DTEND;TZID=America/Los_Angeles:20200612T130000
DTSTAMP:20260403T211032
CREATED:20200601T155458Z
LAST-MODIFIED:20200601T155458Z
UID:826-1591963200-1591966800@inpa.lbl.gov
SUMMARY:VIRTUAL INPA SEMINAR – Jorge Morales (SLAC)
DESCRIPTION:Speaker: Jorge Morales (SLAC) \nTitle: Simulation of Dark Matter and Standard Model Interactions in the SuperCDMS Soudan Experiment  \nAbstract: \nAstronomical observations lead us to believe that dark matter constitutes the majority of the mass of the Universe\, yet it has never been directly observed experimentally. The Super Cryogenic Dark Matter Search Experiment (SuperCDMS) aims to discover the particle nature of dark matter\, by developing and using some of the most sensitive detectors ever built. Previous analyses with SuperCDMS set world leading sensitivity limits to dark matter interactions\, but the analysis techniques have not been based on simulations. Now we have developed an efficient simulations infrastructure that will help better understand the detectors\, develop a better background model\, and optimize the next generation dark matter searches. I present the fully-functional simulations infrastructure to produce high quality samples as well as results for the charge system readout simulations\, and comparisons to expectations from data. Whilst improvement is still needed\, I will show that our simulations well-reproduce dominant features of data\, bringing SuperCDMS closer to a robust simulation-based analysis method\, much needed for the upcoming SuperCDMS dark matter searches. \nJoin Zoom Meeting  \nhttps://lbnl.zoom.us/j/95746341336  \n Meeting ID: 957 4634 1336 
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-jorge-morales-slac-2/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200612T120000
DTEND;TZID=America/Los_Angeles:20200612T130000
DTSTAMP:20260403T211032
CREATED:20200520T205744Z
LAST-MODIFIED:20200520T205744Z
UID:815-1591963200-1591966800@inpa.lbl.gov
SUMMARY:VIRTUAL INPA SEMINAR – Jorge Morales (SLAC)
DESCRIPTION:Speaker: Jorge Morales (SLAC) \nTitle: TBA \nAbstract: TBA
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-jorge-morales-slac/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200605T120000
DTEND;TZID=America/Los_Angeles:20200605T130000
DTSTAMP:20260403T211032
CREATED:20200520T205302Z
LAST-MODIFIED:20200601T144352Z
UID:813-1591358400-1591362000@inpa.lbl.gov
SUMMARY:VIRTUAL INPA SEMINAR – Micah Buuck (SLAC)
DESCRIPTION:Speaker: Micah Buuck (SLAC) \nTitle: Neurtrinoless Double-Beta Decay and Radioactive Backgrounds in the MAJORANA DEMONSTRATOR \nAbstract: Neutrinoless double-beta decay (0νββ) is a lepton-number-violating process whose existence would indicate that neutrinos are Majorana fermions. The MAJORANA collaboration is searching for 0νββ in germanium-76 using a modular array of high-purity germanium detectors\, housed at the Sanford Underground Research Facility in Lead\, South Dakota. This presentation will show the results of an in-depth study of the backgrounds visible to the array\, and the details behind a model to explain their sources. \nJoin Zoom Meeting \nhttps://lbnl.zoom.us/j/99678795337 \nMeeting ID: 996 7879 5337
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-micah-buuck-slac/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200529T120000
DTEND;TZID=America/Los_Angeles:20200529T130000
DTSTAMP:20260403T211032
CREATED:20200520T202607Z
LAST-MODIFIED:20200526T153604Z
UID:811-1590753600-1590757200@inpa.lbl.gov
SUMMARY:VIRTUAL INPA SEMINAR – Luca Pagani (UC Davis)
DESCRIPTION:Speaker: Luca Pagani (UC Davis) \nTitle: Recent results from the ACED and the ARTIE experiments \nAbstract: \nLiquid argon is becoming a popular medium for particle detection\, with applications ranging from low-background dark matter searches to high-energy neutrino detection. Because neutrons represent both an important source of background (e.g.\, for dark matter experiments) and a product of signal events (e.g.\, neutrino-induced spallation neutrons)\, a good understanding of their interactions in argon is a requirement for precision physics measurements. Despite being one of the most basic quantities needed to describe low-energy neutron transport\, the neutron cross section on argon is not clearly understood. In particular\, the existing activation measurements for the thermal neutron capture cross section show significant disagreements. Moreover\, in the energy range 40-70 keV theory predicts an anti-resonance in the $^{40}$Ar cross section near $57$\\,keV\, but the existing data\, coming from an experiment performed in the 90s (Winters. et al.)\, does not support this. To resolve these disagreements\, two experiments were performed using a time of flight neutron beam at Los Alamos National Laboratory. The Argon Capture Experiment at DANCE (ACED) first measured the differential cross section of $^{40}$Ar$(n\,\gamma)^{41}$Ar using the Detector for Advanced Neutron Capture Experiments (DANCE)\, a $\sim$4$\pi$ gamma spectrometer. A fit to the differential cross section from $0.015-0.15$\\,eV\, assuming a $1/v$ energy dependence\, yields $\sigma^{2200} = 673 \pm 26 \text{ (stat.)} \pm 59 \text{(sys.)}$\\,mb. Then\, the Argon Resonance Transmission Interaction Experiment (ARTIE) measured the transmission coefficient for neutrons through a thick ($\sim 3$\\,atoms/b) liquid natural argon target in the energy range 40-70 keV. This measurements are crucial for the Deep Underground Neutrino Experiment (DUNE) since allow a viable means of calibration and a deeper understanding of signals and backgrounds for the low energy science program. \nJoin Zoom Meeting \nhttps://lbnl.zoom.us/j/97119161552 \nMeeting ID: 971 1916 1552
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-luca-pagani-uc-davis/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200522T120000
DTEND;TZID=America/Los_Angeles:20200522T130000
DTSTAMP:20260403T211032
CREATED:20200520T181808Z
LAST-MODIFIED:20200520T181808Z
UID:806-1590148800-1590152400@inpa.lbl.gov
SUMMARY:VIRTUAL INPA SEMINAR – Eric Charles (Stanford) - Friday\, May 22\, 2020
DESCRIPTION:Speaker: Eric Charles (Stanford)\n\n\n\nTitle: Indirect Dark Matter Detection: Status and Summary of WIMP Searches  \n\n \n\nAbstract: \nThe nature of dark matter is a longstanding enigma of physics; it may consist of particles beyond the Standard Model that are still elusive to experiments. Searches for signals from the annihilation or decay of weakly interacting massive particle (WMIP) dark matter using observations of the gamma-ray sky have come to prominence over the last decade.    Current and upcoming telescopes such as the Fermi Large Area Telescope (Fermi-LAT) and the Cerenkov Telescope Array are particularly well suited for searching for products of the interactions of dark matter particles.  In this talk I will describe astrophysical targets studied for evidence of dark matter\, and review the status of these searches.  I will also discuss the factors that determine the sensitivities of these searches\, including the magnitudes of the signals and the relevant backgrounds\, considering both statistical and systematic uncertainties.  Finally\, I will discuss how upcoming observatories operating across the electromagnetic spectrum could change this field. \n \n\nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/91138499248\nMeeting ID: 911 3849 9248
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-eric-charles-stanford-friday-may-22-2020/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200515T120000
DTEND;TZID=America/Los_Angeles:20200515T130000
DTSTAMP:20260403T211032
CREATED:20200507T174249Z
LAST-MODIFIED:20200514T154232Z
UID:801-1589544000-1589547600@inpa.lbl.gov
SUMMARY:VIRTUAL INPA SEMINAR - Chia-Cheng Chang (LBNL)
DESCRIPTION:Speaker: Chia-Cheng Chang (LBNL) \n Title: Time evolution of open quantum many-body systems \nAbstract: \nThe increasing interest and efforts put forth towards the development of quantum computing have lead to a shift in how one goes about tackling problems that are typically thought of as difficult. In this talk I will discuss a specific paradigm of quantum computing called adiabatic quantum computing\, and narrow the scope to discuss what is known as quantum annealing. In particular\, the first part of the talk will be devoted to discussing what quantum annealing is\, and its connection with adiabatic quantum computing. I will follow by discussing the scope of problems that quantum annealers can hope to solve\, include an example for tackling integer linear programming. I will end by discussing our simulation of an open quantum many-body system and compare against experimental results obtained from a DWave quantum annealer. On the DWave\, we employ a modified time evolution schedule and observe an improvement in performance. Results from the simulation provide a possible explanation of the underlying physics by correlating algorithmic improvements to the interplay between quantum decoherence and many-body localization.. \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/99612217893\nMeeting ID: 996 1221 7893
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-qis-candidate-chia-cheng-chang-lbnl/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200508T120000
DTEND;TZID=America/Los_Angeles:20200508T130000
DTSTAMP:20260403T211032
CREATED:20200428T041852Z
LAST-MODIFIED:20200504T164307Z
UID:795-1588939200-1588942800@inpa.lbl.gov
SUMMARY:VIRTUAL INPA SEMINAR - Zachary Marshall (LBNL)
DESCRIPTION:Speaker: Zachary Marshall (LBNL) \n Title: Unidentified New Physics: LHC Searches for SUSY and Dark Matter \nAbstract: \nATLAS and CMS\, two large\, general-purpose experiments at the Large Hadron Collider at CERN\, have a rich program of searches for new physics. This seminar will take a look at some of the most interesting and difficult searches for Supersymmetry and Dark Matter performed to date. Along the way\, there will be some discussion of the difficulties in comparing LHC search results to non-collider search results\, and a look into some of the computing challenges that the experiments will face in the coming decade. \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/99705341835\nMeeting ID: 997 0534 1835
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-zachary-marshall-lbnl/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200501T120000
DTEND;TZID=America/Los_Angeles:20200501T130000
DTSTAMP:20260403T211032
CREATED:20200428T041208Z
LAST-MODIFIED:20200428T041208Z
UID:792-1588334400-1588338000@inpa.lbl.gov
SUMMARY:NO VIRTUAL -  INPA Seminar - Friday\, May 1\, 2020
DESCRIPTION:
URL:https://inpa.lbl.gov/event/no-virtual-inpa-seminar-friday-may-1-2020/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200424T120000
DTEND;TZID=America/Los_Angeles:20200424T130000
DTSTAMP:20260403T211032
CREATED:20200417T225916Z
LAST-MODIFIED:20200420T164514Z
UID:786-1587729600-1587733200@inpa.lbl.gov
SUMMARY:VIRTUAL INPA SEMINAR – Rémi Adam (LLR/CNRS)
DESCRIPTION:Speaker: Rémi Adam (LLR/CNRS) \nTitle: Diffuse gas in galaxy clusters: on the thermal and non-thermal components \nAbstract: \nThe clusters of galaxies represent the last step of the formation of large scale structures in the Universe. They are both useful cosmological probes and unique astrophysical laboratories. The clusters grow by accretion of surrounding structures and from the merging of subclusters\, in very energetic events\, eventually forming a diffuse gas phase made of a hot thermal component\, but also leading to particle acceleration up to very high energies. After introducing the role of clusters in our understanding of the assembly of matter in the Universe\, I will discuss how we can study the diffuse gas phase across cosmic time. The presentation will highlight results based on the NIKA/NIKA2 camera at the IRAM 30m telescope\, sensitive to the thermal gas pressure via the Sunyaev-Zel’dovich effect. I will also present prospects for probing the non-thermal component in the gamma rays with the CTA observatory. \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/94805534408\nMeeting ID: 948 0553 4408
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-remi-adam-llr-cnrs/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200417T120000
DTEND;TZID=America/Los_Angeles:20200417T120000
DTSTAMP:20260403T211032
CREATED:20200414T180221Z
LAST-MODIFIED:20200414T180221Z
UID:784-1587124800-1587124800@inpa.lbl.gov
SUMMARY:VIRTUAL INPA SEMINAR – Ethan Bernard (UC Berkeley)
DESCRIPTION:Speaker: Ethan Bernard (UC Berkeley) \nTitle: The Construction of the LZ Dark Matter Detector \nAbstract: \n\nThe assembly of the LUX-ZEPLIN (LZ) dark matter detector within the Homestake mine in Lead\, South Dakota is nearing completion.  This detector features a two-phase time projection chamber containing seven tons of liquid xenon specifically instrumented to detect low-energy nuclear recoils.  The detector is nested within an active veto system\, a passive water shield\, and 1500 m of rock overburden.  Low-background construction and efficient measurement of scintillation light and ionization electrons will allow detection of hypothetical WIMP (weakly interacting massive particle) dark matter to a sensitivity at least an order of magnitude beyond present limits.  This talk will provide an overview of the design and assembly of this detector with a focus on the unique engineering challenges posed by building a low-background noble liquid experiment at such a large scale.\n\n\n\n\nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/92275279117\nMeeting ID: 922 7527 9117
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-ethan-bernard-uc-berkeley/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200410T120000
DTEND;TZID=America/Los_Angeles:20200410T130000
DTSTAMP:20260403T211032
CREATED:20200406T212010Z
LAST-MODIFIED:20200410T114706Z
UID:773-1586520000-1586523600@inpa.lbl.gov
SUMMARY:VIRTUAL INPA SEMINAR – Nicholas Rodd (LBNL) - URL and Meeting ID Revision
DESCRIPTION:Speaker: Nicholas Rodd (LBNL) \n  \nTitle: Evidence the 3.5 keV line is not from dark matter decay \nAbstract: \nX-ray observations of nearby clusters and galaxies have reported an unexpected X-ray line around 3.5 keV. This line has received significant attention due to its possible explanation through decaying dark matter; in particular\, decaying sterile neutrino models\, with a sterile neutrino mass around 7 keV\, provide a good fit to the available data. We use over 30 Ms of XMM-Newton blank-sky observations to search for evidence of the 3.5 keV line consistent with arising from decaying dark matter within the ambient halo of the Milky Way. We find the strongest limits to-date on the lifetime of dark matter in this mass range\, strongly disfavoring the possibility that the 3.5 keV line originates from dark matter decay. \nREVISION – URL AND MEETING ID \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/993531175\nMeeting ID: 993 531 175
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-nicholas-rodd-lbnl/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200403T120000
DTEND;TZID=America/Los_Angeles:20200403T130000
DTSTAMP:20260403T211032
CREATED:20200327T215301Z
LAST-MODIFIED:20200327T215535Z
UID:764-1585915200-1585918800@inpa.lbl.gov
SUMMARY:VIRTUAL INPA SEMINAR – Zara Bagdasarian (UC Berkeley)
DESCRIPTION:Speaker: Zara Bagdasarian (UC Berkeley)\n\n\n\nTitle: Borexino. Sun. Earth. Neutrinos\n\n\nAbstract: \nBorexino experiment is a 280-ton liquid scintillator detector located at a 3800 m w.e. depth in the Laboratori Nazionali del Gran Sasso (Italy). In more than 12 years of data taking\, Borexino has demonstrated how its unprecedented radio-purity led to exploring a wide range of neutrino physics questions in previously poorly explored low energy range.\n\n\n\n\n\n\n\n\n\n\n\n\nIn 2018-2020\, Borexino published a comprehensive study of pp-chain solar neutrinos\, which sets new milestones in the solar neutrino measurement precision. These neutrinos are the products of the pp-chain of nuclear fusion reactions generating more than 99% of the Sun’s energy. We use the gathered data as a two-fold tool to explore both neutrino and solar physics questions.\n\n\n\n\n\n\n\n\nMoreover\, Borexino is one of only two detectors in the world who have measured geoneutrinos. The results\, published in 2020\, feature increased statistics and the new elaborate analysis. With this update\, we have now been able to access 53 geoneutrino events – almost twice as many as in the result published by the collaboration in 2015. The geological interpretations of this measurement will also be discussed in the talk.\n\n\n\n\n\nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/812787340\n\nMeeting ID: 812 787 340
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-zara-bagdasarian-uc-berkeley/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200309T110000
DTEND;TZID=America/Los_Angeles:20200309T120000
DTSTAMP:20260403T211032
CREATED:20200306T235759Z
LAST-MODIFIED:20200306T235759Z
UID:755-1583751600-1583755200@inpa.lbl.gov
SUMMARY:Special INPA SEMINAR – Rebecca Carney (SLAC)
DESCRIPTION: \nSpeaker: Rebecca Carney (SLAC)\n \n\n\nTitle: Silicon tracking in the search for rare processes \n \nAbstract: The ATLAS Detector\, below the surface of the Swiss-French border\, measures the remnants of high-energy proton-proton collisions\, accelerated by the Large Hadron Collider (LHC) at CERN. A little over a year ago the LHC paused operations\, having delivered an integrated luminosity corresponding to 150 fb^−1 of data at a centre-of-mass energy of 13 TeV. This talk will describe a search for physics beyond the Standard Model using that dataset\, as well as the charged particle tracking detector technology that renders it possible.\n\nSearching for rare processes requires sifting through a large amount of data\, so in 2027 the LHC will enter a High Luminosity phase (HL-LHC)\, increasing the instantaneous luminosity by a factor of five and delivering 4000 fb^-1 within twelve years. This will impose significant technical challenges on all aspects of the ATLAS detector\, resulting in the entire Inner Detector being replaced by an all-silicon tracker. ITk (the new “Inner TracKer”) will be comprised of Strip and Pixel detectors. This talk will also discuss the design of the ITk Pixel detector to handle the increased number of hits per chip and modeling of the damage to the silicon sensor\, both to predict the detector performance and to understand the effects of radiation damage on data taking.
URL:https://inpa.lbl.gov/event/special-inpa-seminar-rebecca-carney-slac/
LOCATION:50B-4205
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200224T110000
DTEND;TZID=America/Los_Angeles:20200224T120000
DTSTAMP:20260403T211032
CREATED:20200219T181744Z
LAST-MODIFIED:20200219T181744Z
UID:747-1582542000-1582545600@inpa.lbl.gov
SUMMARY:Special INPA Seminar – Gulden Othman (University of North Carolina)
DESCRIPTION:Speaker: Gulden Othman (University of North Carolina) \nTitle: CAGE Scanner: Investigating Surface Backgrounds in HPGe Detectors for Neutrinoless Double-Beta Decay Searches \nAbstract: A potential source of problematic backgrounds in a ton-scale 76Ge-based neutrinoless double-beta decay (0nuBB) program may arise from particle interactions occurring near the surfaces of high purity germanium (HPGe) detectors. The Collimated Alphas\, Gammas\, and Electrons scanner (CAGE) is a test stand that allows for in-depth studies of surface events by using vacuum-side\, collimated radiation sources to characterize the response of HPGe detectors to radiation at specific locations on the detector surface. LEGEND is a search for 0nuBB in the 76Ge isotope that will begin operation of a 200 kg array in 2021\, with a plan to scale up to 1000 kg of 76Ge-enriched HPGe detectors in a phased approach. In order to reach LEGEND-1000’s goal of a half-life sensitivity >10^28 years\, understanding and discriminating against backgrounds from surface events is essential. I will motivate the design and current status of CAGE in the context of LEGEND as we begin characterizing the response of two detector geometries that will be used in LEGEND to surface alpha interactions.  
URL:https://inpa.lbl.gov/event/special-inpa-seminar-gulden-othman-university-of-north-carolina/
LOCATION:50A-5132- Sessler\, 50A-5132 Sessler Conference Room\, CA
END:VEVENT
END:VCALENDAR