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DTSTART;TZID=America/Los_Angeles:20220204T120000
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DTSTAMP:20260428T122019
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SUMMARY:NO VIRTUAL INPA Seminar
DESCRIPTION:
URL:https://inpa.lbl.gov/event/no-virtual-inpa-seminar-9/
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20220211T120000
DTEND;TZID=America/Los_Angeles:20220211T130000
DTSTAMP:20260428T122019
CREATED:20220204T225540Z
LAST-MODIFIED:20220204T225540Z
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SUMMARY:NO VIRTUAL INPA Seminar
DESCRIPTION:
URL:https://inpa.lbl.gov/event/no-virtual-inpa-seminar-10/
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20220218T120000
DTEND;TZID=America/Los_Angeles:20220218T130000
DTSTAMP:20260428T122019
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SUMMARY:[UPDATE] VIRTUAL INPA SEMINAR | Sherry Song (Princeton University)
DESCRIPTION:Location: via Zoom \nSpeaker: Sherry Song (Princeton University) \nTitle: Integration and Analysis of the Balloon-borne Telescope\, SPIDER \nAbstract: \n\n\nEver since the discovery of cosmic microwave background(CMB) in the year of 1965\, its existence has led many ground or space observation programs attempt to unveil its nature\, of which the SPIDER program is a balloon-borne telescope designed to map the polarization pattern of the CMB at degree angular scale.\n\nEach of SPIDER’s flight consists of 6 independently controlled telescopes. SPIDER-1 flew in January 2015 and the data analysis targets mainly on polarized B-mode detection\, using XFaster power spectrum estimator as its main pipeline.\n\nMy talk covers the hardware integration of the SPIDER-2 cryo-system and operation\, new data at 280GHz from this second flight will complement the first flight\, providing powerful measurements of the polarized Galactic dust emission. It also covers the pipeline\, data analysis and result of SPIDER-1. SPIDER-1 passes the outlier and distribution null test in all frequencies using 500 end-to-end well-constructed null simulations\, with a PTE value of 0.78 and 0.56 respectively for all frequency combined case. We derive 95% upper limits on the primordial tensor-to-scalar ratio r from Feldman-Cousins and Bayesian constructions\, finding r<0.11 and r<0.19\, respectively.\n\n\nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/91666262470?pwd=MU1jZ3F1dXRYN1ZvMTdrZW13elFvdz09\nMeeting ID: 916 6626 2470\nPasscode: 923119
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-sherry-song-princeton/
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20220225T120000
DTEND;TZID=America/Los_Angeles:20220225T130000
DTSTAMP:20260428T122019
CREATED:20220217T013046Z
LAST-MODIFIED:20220217T013046Z
UID:1157-1645790400-1645794000@inpa.lbl.gov
SUMMARY:VIRTUAL INPA SEMINAR | Ralph Massarczyk (LANL)
DESCRIPTION:Location: via Zoom \nSpeaker: Ralph Massarczyk (LANL) \nTitle: Results from the BEST Sterile Neutrino Oscillation Experiment  \nAbstract: \n\n\nThe Baksan Experiment on Sterile Transitions (BEST) searches for the oscillations between active and sterile neutrinos by exploring the gallium anomaly. Based on the Gallium-Germanium Neutrino Telescope (GGNT) of the SAGE experiment\, the BEST setup is comprised of two zones of liquid Ga target to explore neutrino oscillations on the meter scale. Any deficits in the 71Ge production rates in the two zones\, as well as the differences between them\, would be an indication of nonstandard neutrino properties at this short scale. From July 5th to October 23rd 2019\, the two-zone target was exposed to the mainly monoenergetic Cr neutrino source ten times with 20 independent 71Ge extractions from the two Ga targets. The 71Ge decay rates were measured from July 2019 to March 2020 to determine the total production rate from the neutrino source. At the end of the experiment\, the counting systems were calibrated using 71Ge isotope data taken in November 2020. In this talk\, I will give an overview of the experiment and the analysis\, and discuss the results from the BEST sterile neutrino oscillation experiment.\n\n\nJoin Zoom Meeting \nhttps://lbnl.zoom.us/j/97983025115 \nMeeting ID: 979 8302 5115
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-ralph-massarczyk-lanl/
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