NO INPA SEMINAR
2025-08-29 12:00 - 13:00, 2025-09-05 12:00 - 13:00, 2025-09-12 12:00 - 13:00, 2026-01-09 12:00 - 13:00 (America/Los_Angeles)

NO INPA
2025-08-29 12:00 - 13:00

INPA Seminar Speaker: Yu-Han Tseng(Yale University) -Title: Search for dark matter scattering from optically levitated nanoparticles
2025-09-19 12:00 - 13:00
Date: September 19, 2025
Time: 12:00 pm – 1:00 pm
Location: Sessler Conference Room – 50A-5132 [Hybrid and In-Person]
Speaker: Yu-Han Tseng (Yale University)
Title: Search for dark matter scattering from optically levitated nanoparticles
Abstract: The development of levitated optomechanics has opened up unique opportunities to search for new physics whose weak interactions may have evaded existing sensors. I will describe an initial search for dark matter scattering based on optically levitated, femtogram-scale nanoparticles. In ultra-high vacuum, the force sensitivity of these levitated sensors is primarily limited by quantum measurement noise. For dark matter models that would primarily scatter from an entire nanoparticle (rather than a single nucleus or electron), this initial search can exceed the sensitivity of even large underground detectors. I will also describe how the inherent directional sensitivity of these sensors can be used to separate possible dark matter signals from backgrounds. Finally, I will discuss how the techniques developed here can be extended to light dark matter searches and precision measurements of neutrinos.
Join Zoom Meeting
https://lbnl.zoom.us/j/95016696011?pwd=[REDACTED]
Meeting ID: 950 1669 6011
Passcode: [REDACTED]

INPA Seminar Speaker: Felix Hagemann (UC Berkeley (SSL) )-Title: Pulse Shape Simulation and Detector Characterization Studies for the LEGEND Experiment
2025-09-26 12:00 - 13:00
Date: September 26, 2025
Time: 12:00 pm – 1:00 pm
Location: Sessler Conference Room – 50A-5132 [Hybrid and In-Person]
Speaker: Felix Hagemann (UC Berkeley (SSL)
Title: Pulse Shape Simulation and Detector Characterization Studies for the LEGEND Experiment
Abstract: The search for neutrinoless double beta decay with high-purity germanium detectors is one of the most sensitive approaches to probe lepton-number violation and the Majorana nature of neutrinos. The LEGEND experiment aims to push sensitivity beyond previous efforts by relying on excellent energy resolution and powerful background rejection techniques, including pulse shape discrimination.
In my presentation, I will introduce the LEGEND experimental program, present pulse shape simulation efforts using the open-source Julia software package SolidStateDetectors.jl, and showcase a novel Compton Scanner setup used to characterize the bulk of large-volume germanium detectors. By matching simulation outputs to data from our first Compton Scanner campaign, we were able to determine the impurity density profile and charge carrier mobilities in our test detector, improving the accuracy of detector simulations and enabling the testing and tuning of pulse shape discrimination techniques used in the LEGEND experiment.
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https://lbnl.zoom.us/j/95016696011?pwd=[REDACTED]
Meeting ID: 950 1669 6011
Passcode: [REDACTED]

[CANCELED] NO INPA Seminar Speaker
2025-10-03 12:00 - 13:00
Date: October 3, 2025
Time: 12:00 pm – 1:00 pm
Location: Sessler Conference Room – 50A-5132 [Hybrid and In-Person]
Speaker: CANCELED
Title: TBD
Abstract: TBD
Join Zoom Meeting
https://lbnl.zoom.us/j/95016696011?pwd=[REDACTED]
Meeting ID: 950 1669 6011
Passcode: [REDACTED]

[CANCELED] NO INPA Seminar ( WEEK OF CPAD 2025)
2025-10-10 12:00 - 13:00

INPA SEMINAR SPEAKER: TBA- Title: TBD
2025-10-17 12:00 - 13:00
Date: October 17, 2025
Time: 12:00 pm – 1:00 pm
Location: Sessler Conference Room – 50A-5132 [Hybrid and In-Person]
Speaker: TBA
Title: TBD
Abstract: TBD
Join Zoom Meeting
https://lbnl.zoom.us/j/95016696011?pwd=[REDACTED]
Meeting ID: 950 1669 6011
Passcode: [REDACTED]

INPA Seminar Speaker: Maria Simanovskaia(SLAC) -Title: Listening for dark matter with DMRadio
2025-10-24 12:00 - 13:00
Date: October 24, 2025
Time: 12:00 pm – 1:00 pm
Location: Sessler Conference Room – 50A-5132 [Hybrid and In-Person]
Speaker: Maria Siamovskaia
Title: Listening for dark matter with DMRadio
Abstract: Uncovering the nature of dark matter is one of the biggest challenges of modern physics. The DMRadio program searches for axions with masses below 1 μeV, probing a highly motivated region tied to GUT-scale physics and preinflationary dark matter production. The ultimate experiment for GUT-scale axions requires novel technologies, including large magnets, high-quality-factor resonators, and quantum sensors. A critical step in the path towards the ultimate GUT-scale axion experiment is the commissioning of DMRadio-50L, which will serve as an R&D platform for technologies that will enable a next-generation search. In this talk, I will present the progress of DMRadio-50L commissioning and R&D activities within the DMRadio collaboration.
Join Zoom Meeting
https://lbnl.zoom.us/j/95016696011?pwd=[REDACTED]
Meeting ID: 950 1669 6011
Passcode: [REDACTED]

[SPECIAL] INPA Seminar Speaker: Dr. Thomas Russell (UMass Amherst) and LBL Materials Sciences Division
2025-10-31 12:00 - 13:00
Date: October 31, 2025
Time: 12:00 pm – 1:00 pm
Location: ​B​50- ​Auditorium [Hybrid and In-Person]
Note: Tea and cookies provided!
Speaker: Dr. Thomas Russell​ (UMass Amherst) and the LBL Materials Sciences Division
Title: Structuring Liquids
Abstract: The minimization of free energy forces liquids to assume a spherical shape. If we could lock in different shapes, i.e., structure the liquids, unique materials having the dynamics and mobility of liquids but the structural integrity of a solid would emerge.

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Meeting ID: 973 1481 3383

Passcode: [REDACTED]

INPA Seminar Speaker: Jennifer Pore(LBL)-Title: How the Cyclotron Saved the Periodic Table
2025-11-07 12:00 - 13:00
Date: November 7, 2025
Time: 12:00 pm – 1:00 pm
Location: Sessler Conference Room – 50A-5132 [Hybrid and In-Person]
Speaker: Jennifer Pore
Title: How the Cyclotron Saved the Periodic Table
Abstract: The Periodic Table is a cornerstone of chemistry, but its validity is challenged by the extreme properties of superheavy elements (SHEs, Z ≥ 104) and actinides (Z > 88). Relativistic effects, stemming from their large nuclear charges, significantly alter their chemical behaviors, potentially limiting the predictive power of the Periodic Table. Unfortunately, these elements do not exist naturally on earth and can only be produced in nuclear reactions. A new method has been developed, using a cutting-edge atom-at-a-time technique at the 88-Inch Cyclotron Facility at Lawrence Berkeley National Laboratory, to help us learn more about the interesting chemistry of these elusive elements. Recent results on the production and identification actinium (Ac, Z = 89) and nobelium (No, Z = 102) molecules will be presented. Future directions for unraveling the mysteries of SHE chemistry will be discussed, which will challenge our current understanding of the Periodic Table.
Join Zoom Meeting
https://lbnl.zoom.us/j/95016696011?pwd=[REDACTED]
Meeting ID: 950 1669 6011
Passcode: [REDACTED]

INPA Seminar Speaker: Arran Phipps(CSU East Bay)-Title:SPLENDOR: Searching for Light Dark Matter with Narrow-Gap Semiconductors
2025-11-14 12:00 - 13:00
Date: November 14, 2025
Time: 12:00 pm – 1:00 pm
Location: Sessler Conference Room – 50A-5132 [Hybrid and In-Person]
Speaker: Arran Phipps (CSU East Bay)
Title: SPLENDOR: Searching for Light Dark Matter with Narrow-Gap Semiconductors
Abstract: SPLENDOR is a cross-disciplinary collaboration developing novel semiconductor detectors to search for low-mass, particle-like dark matter. Our approach combines low-bandgap semiconductor targets with ultra-low-noise cryogenic charge amplifiers to probe energy depositions below 1 eV. We have developed a modular detector platform optimized for rapid integration of new materials, featuring a two-stage cryogenic HEMT-based amplifier with a demonstrated charge resolution of 19 ± 4 electrons. This talk will review the motivation for sub-GeV dark matter detection with low-temperature semiconductors, describe SPLENDOR’s experimental design and calibration efforts, and discuss future directions in device development and charge amplification.
Join Zoom Meeting
https://lbnl.zoom.us/j/95016696011?pwd=[REDACTED]
Meeting ID: 950 1669 6011
Passcode: [REDACTED]

NO INPA Seminar Talk
2025-11-20 12:00 - 13:00, 2025-11-28 12:00 - 13:00

[NEW LOCATION-INPA 50-5026] INPA Seminar Speaker: Heather Crawford(LBNL)Title: The Gamma-Ray Energy Tracking Array – GRETA
2025-12-05 12:00 - 13:00
Date: December 5, 2025
Time: 12:00 pm – 1:00 pm
New Location: INPA Conference Room – 50-5026 [Hybrid and In-Person]
Speaker: Heather Crawford (LBNL)
Title: The Gamma-Ray Energy Tracking Array – GRETA
Abstract: The Gamma-Ray Energy Tracking Array (GRETA) Project started in 2017, following nearly a decade of successful science with the predecessor GRETINA array. Led by the Nuclear Science Division at LBNL, and with a team including scientists, engineers, and technical staff from NSD, Engineering, and ESnet, as well as from partner institutions ANL, ORNL, and FRIB, GRETA recently completed the CD-E-4A milestone. It is currently being installed at the Facility for Rare Isotope Beams (FRIB), with first science measurements expected at the end of 2026. I will review the GRETA project goals, both scientific and technical, and how it progressed from concept to fabrication to anticipated first science at FRIB.
Join Zoom Meeting
https://lbnl.zoom.us/j/95016696011?pwd=[REDACTED]
Meeting ID: 950 1669 6011
Passcode: [REDACTED]
