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DTSTART:20250101T000000
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DTSTART;TZID=UTC:20250408T160000
DTEND;TZID=UTC:20250408T170000
DTSTAMP:20260525T100352
CREATED:20250327T200842Z
LAST-MODIFIED:20250327T200842Z
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SUMMARY:Speaker: Harry Teplitz (Caltech/IPAC) - Title: Euclid:  an ESA Mission with NASA Involvement to Study the Dark Universe
DESCRIPTION:Research Progress Meeting \nDate: April 8\, 2025 \nTime: 4:00- 5:00 pm \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Harry Teplitz (Caltech/IPAC) \nTitle: Euclid: an ESA Mission with NASA Involvement to Study the Dark Universe \nAbstract: Euclid is a European Space Agency mission with NASA involvement to study the geometry and nature of the dark universe. It is optimized for two of the primary probes of dark energy: weak gravitational lensing and galaxy clustering. Euclid launched on 1 July 2023 on a SpaceX Falcon 9 from Cape Canaveral. During its 6 year primary mission\, Euclid will survey over 13\,000 sq.deg. of extragalactic sky and obtain optical images (530-920nm band)\, near-infrared images (Y\,J\,H) and slitless near-infrared grism spectra (1206nm-1892nm\, R~480). All Euclid data will be made public to the world community after a proprietary period. Euclid’s first large data set of over 60 square degrees was released on March 19\, 2025 (Quick Release 1 or Q1)\, and the first year of data (about 2000 square degrees) will be released in 2026. I will give an overview of Euclid’s science goals\, observing status\, and the Q1 data and results.\n \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/95679892182?pwd=RU5xU2dDRFNabnR1U3pQMklkYWFIdz09 \nMeeting ID: 956 7989 2182 \nPasscode: 169037
URL:https://rpm.physics.lbl.gov/event/speaker-harry-teplitz-caltech-ipac-title-euclid-an-esa-mission-with-nasa-involvement-to-study-the-dark-universe/
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BEGIN:VEVENT
DTSTART;TZID=UTC:20250417T160000
DTEND;TZID=UTC:20250417T170000
DTSTAMP:20260525T100352
CREATED:20250408T164404Z
LAST-MODIFIED:20250408T164404Z
UID:2823-1744905600-1744909200@rpm.physics.lbl.gov
SUMMARY:Speaker: Victoria Xu (UCB) - Title: Broadband quantum enhancement of the LIGO detectors with frequency-dependent squeezing
DESCRIPTION:Research Progress Meeting \nDate: April 17\, 2025 \nTime: 4:00- 5:00 pm \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Victoria Xu (UCB) \nTitle: Broadband quantum enhancement of the LIGO detectors with frequency-dependent squeezing \nAbstract: Quantum noise imposes a fundamental limitation on the sensitivity of laser-interferometric gravitational-wave detectors like LIGO\, manifesting as shot noise and quantum radiation pressure noise. We present the realization of frequency-dependent squeezing for the fourth astrophysical observing run of the LIGO detectors\, resulting in the reduction of both shot noise and quantum radiation pressure noise\, alongside broadband detector sensitivity enhancement from tens of hertz to several kilohertz. We further show that frequency-dependent squeezing enables astrophysical operation with quantum noise squeezed below the Standard Quantum Limit by almost 3 dB around 50 Hz\, where the LIGO detectors are most astrophysically sensitive. Frequency-dependent squeezing was enabled by the addition of a 300-meter-long in-vacuum filter cavity at each detector\, as part of the A+ upgrade to Advanced LIGO. For the LIGO Hanford detector\, squeezing reduced the detector noise power by ~5 dB near 1 kHz; for the Livingston detector\, detector noise power was reduced by ~6 dB. Combined with technical noise improvements\, the quantum upgrade to frequency-dependent squeezing has expanded the detectors’ astrophysical range by almost 20% with respect to no squeezing\, and thus improved astrophysical trigger rates by up to 70% during the ongoing fourth observing run of the LIGO detectors. \nhttps://lbnl.zoom.us/j/98854322464?pwd=K2tKUm1VZjRlV1J5RHE3cXdHQzRxdz09\n\nMeeting ID: 988 5432 2464\n\nPasscode: 142239
URL:https://rpm.physics.lbl.gov/event/speaker-victoria-xu-ucb-title-broadband-quantum-enhancement-of-the-ligo-detectors-with-frequency-dependent-squeezing/
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BEGIN:VEVENT
DTSTART;TZID=UTC:20250424T160000
DTEND;TZID=UTC:20250424T160000
DTSTAMP:20260525T100352
CREATED:20250404T154942Z
LAST-MODIFIED:20250404T155008Z
UID:2815-1745510400-1745510400@rpm.physics.lbl.gov
SUMMARY:Speaker: Michael Williams (LBNL) - Title: First Above-Ground Dark Matter Search Results from the TESSERACT Collaboration
DESCRIPTION:Research Progress Meeting \nDate: April 24\, 2025 \nTime: 4:00- 5:00 pm \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Michael Williams (LBNL) \nTitle: First Above-Ground Dark Matter Search Results from the TESSERACT Collaboration \nAbstract: The TESSERACT collaboration will search for dark matter particles with masses below that of the proton using two novel\, ultra-sensitive detector technologies: SPICE and HeRALD. These detectors are designed to deliver world-leading sensitivity to a broad range of low-mass dark matter candidates. In this talk\, I will share recent progress in the development of Transition Edge Sensors (TESs) with sub-eV energy resolution\, a critical advancement enabling the next generation of low-mass dark matter searches. I will focus on our improved understanding of the “low energy excess” background commonly observed in cryogenic detectors\, along with new techniques developed to discriminate this background from potential signals. This will culminate in discussion of TESSERACT’s first above-ground dark matter search\, which achieved world-leading sensitivity to dark matter masses below 87 MeV/c²\, powered by the most sensitive athermal phonon sensors ever deployed. \nhttps://lbnl.zoom.us/j/98854322464?pwd=K2tKUm1VZjRlV1J5RHE3cXdHQzRxdz09\n\nMeeting ID: 988 5432 2464\n\nPasscode: 142239
URL:https://rpm.physics.lbl.gov/event/speaker-michael-williams-lbnl-title-first-above-ground-dark-matter-search-results-from-the-tesseract-collaboration/
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