INPA

NO INPA SEMINAR
2023-10-20 12:00 - 13:00, 2023-11-24 12:00 - 13:00, 2023-12-01 12:00 - 13:00, 2023-12-15 12:00 - 13:00, 2023-12-22 12:00 - 13:00, 2023-12-29 12:00 - 13:00, 2024-02-02 12:00 - 13:00 (America/Los_Angeles)

Speaker: Jose María Palencia (Instituto de Física de Cantabria, Spain) - Title: Probing the Universe: Extremely Magnified Stars and Gravitational Lensing
2023-10-27 12:00 - 13:00
Date: Friday, October 27, 2023

Time: 12:00 PM – 1:00 PM
Location: Sessler Conference Room–50A-5132 [Hybrid and In-Person]
Speaker: Jose María Palencia (Instituto de Física de Cantabria, Spain)
Title: Probing the Universe: Extremely Magnified Stars and Gravitational Lensing
Abstract: In 2018, an intriguing astronomical phenomenon came to light – Extremely Magnified Stars. These transients are a consequence of gravitational lensing, facilitated by the combined influence of galaxy clusters and intracluster microlenses, leading to an amplification of individual star brightness by a factor exceeding 1000. This presentation will delve into the underlying gravitational lensing mechanism responsible for this unique phenomenon. In the second part of the talk, we will explore the utility of Extremely Magnified Stars for improving our understanding of the formation of massive stars in the early universe, investigating the presence of empirical limits observed within our local universe, and using these events as valuable tools for probing dark matter models.
Zoom Information:
https://lbnl.zoom.us/j/95016696011?pwd=[REDACTED]

Meeting ID: 950 1669 6011
Passcode: [REDACTED]

Speaker: Shawn Westerdale(UC Riverdale)- Title:Dark matter searches with the Global Argon Dark Matter Collaboration: Status of the DEAP-3600 and DarkSide-20k experiments
2023-11-03 12:00 - 13:00
Date: Friday, November 3, 2023

Time: 12:00 PM – 1:00 PM
Location: Sessler Conference Room–50A-5132 [Hybrid and In-Person]
Speaker: Speaker: Shawn Westerdale(UC Riverdale)
Title: Dark matter searches with the Global Argon Dark Matter Collaboration: Status of the DEAP-3600 and DarkSide-20k experiments
Abstract: The Global Argon Dark Matter Collaboration (GADMC) is the union of the ArDM, DarkSide, DEAP, and MiniCLEAN dark matter direct detection experiments, aiming to fully explore the experimentally accessible dark matter parameter space down to the neutrino fog. While the experimental collaborations that joined to form GADMC all used argon-based detectors, they employed a variety of detector designs. This presentation will give an overview of the DarkSide-50 and DEAP-3600 detectors and present their latest results, which include some of the strongest direct detection constraints on light and ultra-heavy dark matter. In addition to their physics results, these experiments developed key technology that enables future detectors. We will discuss plans for these future detectors, including DarkSide-20k — currently under construction — and DarkSide-LowMass, covering an overview of their design and expected sensitivity.
Zoom Information:
https://lbnl.zoom.us/j/95016696011?pwd=[REDACTED]

Meeting ID: 950 1669 6011
Passcode: [REDACTED]

NO INPA SEMINAR (Veterans Day- Optional LBL Holiday)
2023-11-10 12:00 - 13:00

Speaker: David Maibach (Heidelberg)-Title: "Cosmic Strings and where to find them"
2023-11-17 12:00 - 13:00
Date: Friday, November 17, 2023

Time: 12:00 PM – 1:00 PM
Location: Sessler Conference Room–50A-5132 [Hybrid and In-Person]
Speaker: David Maibach (Heidelberg)
Title: “Cosmic Strings and where to find them”
Abstract: “A large class of particle physics models beyond the Standard Model admit topologically stable string configurations, so-called Cosmic Strings. If Nature is described by such a theory, a network of strings will form during a symmetry-breaking phase transition in the early universe and leave traceable features in various probes. The search for these signatures provides an interesting interplay between particle physics and cosmology that can constrain particle physics from the high energy end downwards. In this talk, I will give a brief introduction to the intricate world of Cosmic Strings and explore potential probes of string signatures within the regime of electromagnetic and gravitational radiation.”
Zoom Information:
https://lbnl.zoom.us/j/95016696011?pwd=[REDACTED]

Meeting ID: 950 1669 6011
Passcode: [REDACTED]

Speaker: Richard Feder-Staehle ( Caltech) Title: Uncovering the Near-Infrared Universe through Galaxy Surveys and Intensity Mapping
2023-12-08 12:00 - 13:00
Date: Friday, December 8, 2024
Time: 12:00 PM – 1:00 PM
Location: Sessler Conference Room–50A-5132 [Hybrid and In-Person]
Speaker: Richard Feder-Staehle (Caltech)
Title: Uncovering the Near-Infrared Universe through Galaxy Surveys and Intensity Mapping
Abstract: In this talk I will discuss two complementary methods for measuring large-scale structure, namely through galaxy surveys and broad-band intensity mapping. In the first half will present updated galaxy simulations and redshift forecasts for SPHEREx, NASA’s next MIDEX mission which will conduct the first all-sky spectrophotometric survey in the near-infrared (0.75 – 5 um, R~30-140). In the second half I will present preliminary results from a fluctuation analysis of imager data taken at 1.1 and 1.8 um during the final flight of the Cosmic Infrared Background ExpeRiment (CIBER), a sounding rocket payload designed to characterize and decompose the extragalactic background light.
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Meeting ID: 950 1669 6011

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Speaker: Leire Larizgoitia (DIPC (Spain), U. Chicago) Title: High-pressure gaseous TPCs for CEvNS detection at the ESS
2024-01-12 12:00 - 13:00
Date: Friday, January 12, 2024
Time: 12:00 PM – 1:00 PM
Location: Sessler Conference Room–50A-5132 [Hybrid and In-Person]
Speaker: Leire Larizgoitia (DIPC (Spain), U. Chicago)
Title: High-pressure gaseous TPCs for CEvNS detection at the ESS
Abstract: The recent detection of the coherent elastic neutrino-nucleus scattering (CEνNS) opens the possibility to detect neutrinos with small-size detectors and with different techniques, opening a new window to explore possible BSM physics.
The CEνNS process generates signals at the few-keV level, requiring sensitive detection technologies for its observation. The European Spallation Source (ESS) has been identified as the best possible site for the exploration this CEνNS process.
Within the NuESS program, two different detector approaches are currently under development at Donostia International Physics Center (DIPC). The GanESS project, a high-pressure gaseous time projection chamber (TPC) and the CoSI project, which employs cryogenic undoped CsI crystals.
These next-generation technologies will be capable of observing the process with lower energy threshold and better energy resolution than current detectors. In addition, the combination of these detectors will allow for a complete phenomenological exploitation of the CEνNS signal. In particular, these measurements will not be statistically limited due to the synergy between larger neutrino fluxes at the ESS and these improved detectors.
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Meeting ID: 950 1669 6011

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Speaker: Bradford Welliver (UCB/ LBL)Title: Results from the CUPID-Mo Experiment
2024-01-19 12:00 - 13:00
Date: Friday, January 19, 2024
Time: 12:00 PM – 1:00 PM
Location: Sessler Conference Room–50A-5132 [Hybrid and In-Person]
Speaker: Bradford Welliver (UCB/ LBL)
Title: Results from the CUPID-Mo Experiment
Abstract: The recent detection of the coherent elastic neutrino-nucleus scattering (CEνNS) opens the possibility to detect neutrinos with small-size detectors and with different techniques, opening a new window to explore possible BSM physics.
The CEνNS process generates signals at the few-keV level, requiring sensitive detection technologies for its observation. The European Spallation Source (ESS) has been identified as the best possible site for the exploration this CEνNS process.
Within the NuESS program, two different detector approaches are currently under development at Donostia International Physics Center (DIPC). The GanESS project, a high-pressure gaseous time projection chamber (TPC) and the CoSI project, which employs cryogenic undoped CsI crystals.
These next-generation technologies will be capable of observing the process with lower energy threshold and better energy resolution than current detectors. In addition, the combination of these detectors will allow for a complete phenomenological exploitation of the CEνNS signal. In particular, these measurements will not be statistically limited due to the synergy between larger neutrino fluxes at the ESS and these improved detectors.
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https://lbnl.zoom.us/j/95016696011?pwd=[REDACTED]
Meeting ID: 950 1669 6011

Passcode: [REDACTED]

Speaker: Bharath Nagam (Groningen) Title:Finding strong lenses using deep learning with upcoming Euclid data
2024-01-26 12:00 - 13:00
Date: Friday, January 26, 2024
Time: 12:00 PM – 1:00 PM
Location: Sessler Conference Room–50A-5132 [Hybrid and In-Person]
Speaker: Bharath Nagam (Groningen)
Title: Finding strong lenses using deep learning with upcoming Euclid data
Abstract: “Detecting strong lenses in a large dataset such as Euclid is very challenging due to the unbalanced nature of dataset. Existing CNN models are producing large amount of false positives, for example one strong
lens candidate will be accompanied by 100’s of false positives in the final sample. To over come this challenge, we have developed a novel ML pipeline called DenseLens, which consists of three components namely Classification ensemble, Regression ensemble and Segmentation. Classification ensemble is an ensemble of DenseNet-CNNs which provides predictions in range [0,1] and Regression ensemble rank-orders strong lenses based on Information Content i.e., higher the rank, the more visually convincing features. Finally we use the segmentation model to predict the source pixels of the rank-ordered image. We use this additional information from this predicted source pixels to classify whether the candidate is a strong lens or not. We applied this the novel approach of combing different ML models to the Kilo Degree Survey (KiDS) data and we reduced the false positives by an enormous factor.
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Meeting ID: 950 1669 6011

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[Special] Speaker: Mark Anderson(Queen's University) Title: Advancing nuclear and particle physics with deep learning: from event reconstruction to signal denoising
2024-02-01 12:00 - 13:00
SPECIAL INPA SEMINAR
Date: Thursday, February 1, 2024
Time: 12:00 PM – 1:00 PM
Location: INPA Conference Room–5026 [Hybrid and In-Person]
Speaker: Mark Anderson (Queen’s University)
Title: Advancing nuclear and particle physics with deep learning: from event reconstruction to signal denoising
Abstract: In this talk, I will present my research on advancing nuclear and particle physics using deep learning. The first portion of the presentation will focus on the SNO+ experiment, a multi-purpose neutrino experiment with the primary goal of searching for neutrinoless double-beta decay. In particular, my work involves developing deep learning-based techniques for event reconstruction of particle interactions in the detector. Currently, SNO+ uses a chain of algorithms involving maximum likelihood estimation. I will demonstrate that my independent, deep learning approach can be used to improve the reconstruction accuracy, while also offering substantial gains in speed. This has implications on volume fiducialization and background rejection.
In the second part of my talk, I will present studies on a deep convolutional autoencoder designed to remove electronic noise from a p-type point contact high purity germanium detector. With their intrinsic purity and excellent energy resolutions, these detectors are suitable for a variety of rare event searches such as neutrinoless double-beta decay, dark matter candidates, and other exotic physics. However, noise from the readout electronics can make identifying events of interest more challenging. I will highlight several studies that show that detector performance can be improved when signals are denoised with the autoencoder, leading to better physics outcomes.
While both of these projects are applied to data from specific detector technologies, the methods I have developed are broadly applicable. The groups I work with have begun exploring new applications of my research with promising results. At the end of the talk, I will discuss some specific extensions and provide an outlook for the future.
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Meeting ID: 950 1669 6011
Passcode: [REDACTED]

Speaker: TBD Title:TBD
2024-02-06 12:00 - 13:00
INPA SEMINAR TALK
Date: Friday, March 1, 2024
Time: 12:00 PM – 1:00 PM
Location: Sessler Conference Room–50A-5132 [Hybrid and In-Person]
Speaker: TBA
Title: TBD
Abstract: TBD
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https://lbnl.zoom.us/j/95016696011?pwd=[REDACTED]
Meeting ID: 950 1669 6011
Passcode: [REDACTED]

CANCELED- NO INPA SEMINAR TALK
2024-02-09 12:00 - 13:00

[Special] Speaker: Alec Lindman (University of Mainz) Title: Atomic tritium for next-generation neutrino mass measurement with Project 8
2024-02-15 12:00 - 13:00
SPECIAL INPA SEMINAR
Date: Thursday, February 15, 2024
Time: 12:00 PM – 1:00 PM
Location: Sessler Conference Room–50A-5132 [Hybrid and In-Person]
Speaker: Alec Lindman (University of Mainz)
Title: Atomic tritium for next-generation neutrino mass measurement with Project 8
Abstract: Neutrinos provide a window to physics beyond the Standard Model through their nonzero mass, but new technology is required to push below current limits. Project 8 is a next-generation direct neutrino mass experiment with a sensitivity of 40 meV/c^2. We have established a new frequency-based technique, cyclotron radiation emission spectroscopy (CRES), to make precise, differential measurements of the endpoint region of the tritium beta-decay spectrum. Atomic tritium will improve Project 8’s sensitivity by 10 to 30 times over a similar molecular experiment. This talk will focus on the development of the new technologies to enable the atomic tritium experiment. I will outline Project 8’s atomic architecture, which includes large magnetic traps (~ 50 m^3) that store atoms at ~ 1 mK to benefit from CRES’s volume scaling, a chain of atom cooling and transport elements to maintain the intended density in the trap, and a tritium-compatible atom source that can provide the necessary flux of 10^19 atoms/s.
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Meeting ID: 950 1669 6011

Passcode: [REDACTED]

Speaker: Juliana Stachurska (MIT) Title: Large-volume CRES detectors for the Project 8 neutrino mass measurement
2024-02-16 12:00 - 13:00
INPA SEMINAR TALK
Date: Friday, February 16, 2024
Time: 12:00 PM – 1:00 PM
Location: Sessler Conference Room–50A-5132 [Hybrid and In-Person]
Speaker: Juliana Stachurska (MIT)
Title: Large-volume CRES detectors for the Project 8 neutrino mass measurement
Abstract: Project 8 is a next-generation experiment aiming to directly measure the neutrino mass using the tritium endpoint method with a targeted sensitivity of 40 meV. The development of new technology and methods are required to reach this unprecedented sensitivity. Having established a new measuring technique, Cyclotron Radiation Emission Spectroscopy (CRES), we are now focusing on the scaling of CRES to large volumes and the development of an atomic source for a pilot-scale CRES experiment with atomic tritium. In this talk, I will focus on the CRES development, highlighting the milestones already achieved, and will present our next R&D demonstrators.
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Meeting ID: 950 1669 6011

Passcode: [REDACTED]

Speaker: Jan Balewski (LBL/NERSC) Title: Programming Today's Quantum Computers
2024-02-23 12:00 - 13:00
INPA SEMINAR TALK
Date: Friday, February 23, 2024
Time: 12:00 PM – 1:00 PM
Location: Sessler Conference Room–50A-5132 [Hybrid and In-Person]
Speaker: Jan Balewski (LBL/NERSC)
Title: Programming Today’s Quantum Computers
Abstract: As the field of quantum computing continues to advance, cloud-based access to Quantum Computing Units (QPUs) is expanding research capabilities. This seminar outlines the current state of commercial quantum processors, including transmon-based systems from IBM, trapped ion processors by Quantinuum, and neutral atom platforms from QuEra.
The potential applications of quantum computing in addressing certain scientific domains are explored, including understanding gravitational phenomena and energy levels in chemical molecules. An introductory overview of quantum algorithms will be provided, with focus on demonstrating their capability for efficient sequenced data storage on a logarithmically small number of qubits. Results obtained from selected real quantum hardware will be presented, highlighting advancements in image processing and DNA sequence analysis. Additionally, an innovative approach for identifying low-energy states in large crystalline structures through the adiabatic evolution of a linear 58-spin Ising model will be discussed.
This seminar aims to introduce basic ideas behind theoretical quantum computing advancements and their practical scientific applications, offering insights into how quantum technologies can be utilized in contemporary research. It also sets the stage for enabling NERSC users to engage directly with quantum computation in their scientific endeavors in the future.
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Meeting ID: 950 1669 6011

Passcode: [REDACTED]

Speaker: TBA Title: TBD
2024-03-01 12:00 - 13:00

Speaker: Diya (Diyaselis) Delgado Lopez (Harvard) Title: Neutrinos as a gateway to the dark sector
2024-03-08 12:00 - 13:00
INPA SEMINAR TALK
Date: Friday, March 8, 2024
Time: 12:00 PM – 1:00 PM
Location: Sessler Conference Room–50A-5132 [Hybrid and In-Person]
Speaker: Diya (Diyaselis) Delgado Lopez (Harvard)
Title: Neutrinos as a gateway to the dark sector
Abstract: Evidence for the existence of dark matter strongly motivates the efforts to study its unknown properties. Additionally, the origin of high-energy astrophysical neutrinos detected by IceCube remains uncertain. Scotogenic models, in which neutrino mass generation occurs through interactions with the dark sector, are some of the leading theories that explain these two mysteries simultaneously. If dark matter and neutrinos couple to each other, we can search for a non-zero elastic scattering cross section. The interaction between an isotropic extragalactic neutrino flux and dark matter would be concentrated in the Galactic Center, where the dark matter column density is largest. The flux of high-energy neutrinos would be attenuated by this scattering, and the resulting signal, with correlated energy and arrival direction, can be observed in IceCube. Using the ten years of IceCube data, we perform an binned likelihood analysis, searching for several potential DM-neutrino interaction scenarios.
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Meeting ID: 950 1669 6011
Passcode: [REDACTED]

Speaker: TBA Title: TBD
2024-03-15 12:00 - 13:00
INPA SEMINAR TALK
Date: Friday, March 15, 2024
Time: 12:00 PM – 1:00 PM
Location: Sessler Conference Room–50A-5132 [Hybrid and In-Person]
Speaker: TBA
Title: TBD
Abstract: TBD
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Meeting ID: 950 1669 6011
Passcode: [REDACTED]

Speaker: TBA Title: TBD
2024-03-22 12:00 - 13:00
INPA SEMINAR TALK
Date: Friday, March 22, 2024
Time: 12:00 PM – 1:00 PM
Location: Sessler Conference Room–50A-5132 [Hybrid and In-Person]
Speaker: TBA
Title: TBA
Abstract: TBD
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Meeting ID: 950 1669 6011
Passcode: [REDACTED]

NO INPA SEMINAR
2024-03-29 12:00 - 13:00
NO INPA SEMINAR TALK SCHEDULE FOR 3/29/2024

Speaker: Eric Gawiser (Rutgers) Title: Improving Photometric Redshifts for 3x2pt Cosmology: Training Sample Augmentation, Optimal Binning, and Neural Network Classifiers
2024-04-05 12:00 - 13:00
INPA SEMINAR TALK
Date: Friday, April 5, 2024
Time: 12:00 PM – 1:00 PM
Location: Sessler Conference Room–50A-5132 [Hybrid and In-Person]
Speaker: Eric Gawiser (Rutgers)
Title: Improving Photometric Redshifts for 3x2pt Cosmology: Training Sample Augmentation, Optimal Binning, and Neural Network Classifiers
Abstract: Large imaging surveys of galaxies rely on photometric redshifts (photo-z’s) and tomographic binning for 3 × 2 pt analyses that combine galaxy clustering and weak lensing. We divide simulated galaxy catalogs into training and application sets, where the spectroscopic training set is non-representative in a realistic way, and then estimate photometric redshifts for the application set. Spectroscopic training samples for the Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST) will be biased towards redder, brighter, lower-redshift galaxies, leading to photo-z estimates with outlier fractions nearly 4 times larger than for a representative training sample. Training sample augmentation allows us to add simulated galaxies possessing otherwise unrepresented features to our mock spectroscopic training sample, reducing the outlier fraction of the photo-z estimates by 50% and the scatter by 56%. We sort the galaxies into redshift bins chosen to maximize the 3x2pt signal using a novel generalized binning parameterization introduced by Moskowitz et al. (2023, ApJ 950, 49). Applying a neural network classifier trained to identify galaxies that are highly likely to be sorted into the correct redshift bin improves the figure of merit by ∼13%, equivalent to a 28% increase in data volume.
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Meeting ID: 950 1669 6011
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Speaker: Elisabeth Krause (U of Arizona) Title: A Parameter-Masked Mock Data Challenge for Beyond-Two-Point Galaxy Clustering Statistics
2024-04-12 12:00 - 13:00
INPA SEMINAR TALK
Date: Friday, April 12, 2024
Time: 12:00 PM – 1:00 PM
Location: Sessler Conference Room–50A-5132 [Hybrid and In-Person]
Speaker: Elisabeth Krause (U of Arizona)
Title: A Parameter-Masked Mock Data Challenge for Beyond-Two-Point Galaxy Clustering Statistics
Abstract: The last few years has seen the emergence of a vast array of novel techniques for the analysis of high precision data from upcoming galaxy surveys, which are primarily motivated by the notion that any optimal analysis of galaxy clustering data should extend beyond the canonical two-point (2pt) statistics. We test and benchmark some of these new techniques
in a community data challenge “Beyond-2pt’’. The challenge dataset consists of high-precision mock galaxy catalogs for clustering in real-space, redshift-space, and on a light cone. Participants in the challenge have developed end-to-end pipelines to analyze mock catalogs and extract unknown (“masked”) cosmological parameters of the underlying LCDM models with their methods. The methods represented are density-split clustering, nearest neighbor statistics, BACCO power spectrum emulator, void statistics, field-level effective field theory (EFT), and joint power spectrum and bispectrum analyses using both EFT and simulation-based inference.
I will review the results of the challenge, focusing on problems solved, lessons learned, and future research needed to perfect the emerging beyond-2pt approaches.
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Meeting ID: 950 1669 6011
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Speaker: TBA Title: TBD
2024-04-19 12:00 - 13:00
INPA SEMINAR TALK
Date: Friday, April 19, 2024
Time: 12:00 PM – 1:00 PM
Location: Sessler Conference Room–50A-5132 [Hybrid and In-Person]
Speaker: TBA
Title:TBD
Abstract: TBD
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Meeting ID: 950 1669 6011

Speaker: Johann Martyn (Mainz University) Title: "Using Cherenkov light to measure solar neutrinos in liquid scintillator detectors "
2024-04-26 12:00 - 13:00
INPA SEMINAR TALK
Date: Friday, April 26, 2024
Time: 12:00 PM – 1:00 PM
Location: Sessler Conference Room–50A-5132 [Hybrid and In-Person]
Speaker: Johann Martyn (Mainz University) [Remote talk]
Title: Using Cherenkov light to measure solar neutrinos in liquid scintillator detectors

Abstract: At present, solar neutrinos are observed either with liquid scintillator detectors or with water Cherenkov detectors. Liquid scintillator detection in particular is the only technique that allows precision spectroscopy of sub-MeV solar neutrinos, which is made possible by the high light-yield of the scintillation, allowing for a low energy threshold of ∼0.2 MeV. In contrast, water Cherenkov detectors are only able to measure solar neutrinos above a few MeV with high precision. They reconstruct the event direction via the corresponding Cherenkov photon hits, to differentiate between the solar neutrino signal and the background events. A hybrid event detection approach, combining both the directional Cherenkov information and the high light-yield and low energy threshold of the scintillation spectroscopy enables an unprecedented precision for the measurement of solar neutrinos and potentially other physics goals. This talk describes the first measurement of solar neutrinos in a liquid scintillator detector through their directional Cherenkov photons, using Borexino, a 280 ton, high light-yield liquid scintillator detector at the Gran Sasso National Laboratory in Italy.
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Meeting ID: 950 1669 6011
