Institute for Nuclear and Particle Astrophysics (INPA) at LBNL

The INPA Seminar weekly talks are on Fridays, starting at 12:00 pm, unless informed otherwise. The seminar talk starts with a brief presentation of the weekly scientific news. Typically, the talks conclude by 1:00 pm. The seminars are held in the Sessler Conference Room,  located in Bldg. 50A- 5132.

The committee members are:

The seminar schedule for the Institute for Nuclear and Particle Astrophysics (INPA) is tentative and becomes final a few days before the Friday talk.

Please send all suggestions for future INPA talks and speakers to the INPA Committee.

To be added to the INPA News Mailing List, please contact Erica Hall.

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SPEAKER: Daniel Kodroff (Penn State University) – TITLE: Background Modeling and First Results From The LUX-ZEPLIN Dark Matter Experiment

November 18, 2022 @ 12:00 pm - 1:00 pm

This is a VIRTUAL Event

TITLE: Background Modeling and First Results From The LUX-ZEPLIN Dark Matter Experiment

ABSTRACT: LUX-ZEPLIN (LZ) is a dark matter experiment located at the Sanford Underground Research Facility in South Dakota, USA employing a 7 tonne active volume of liquid xenon in a dual-phase time projection chamber (TPC). It’s surrounded by an instrumented xenon “skin” region and gadolinium-loaded liquid scintillator outer detector, primarily serving as active vetoes for gamma-ray and neutron backgrounds, respectively, all contained within an ultra-pure water tank. A comprehensive material
assay and selection campaign for detector components, along with a xenon purification campaign, have further ensured an ultra-low background environment. These mitigations have allowed LZ to achieve a background rate of (63.0 ± 4.5) x 10−6 events/keVee/kg/day in the low energy region, approximately 60 times lower than that of its predecessor LUX experiment. In this low background region, LZ has recently set new world-leading limits for the spin-independent elastic scattering of nuclear recoils of Weakly Interacting Massive Particles (WIMPs) with masses above 9 GeV/c^2 using an exposure of 60 live days and a fiducial mass of 5.5 tonnes. This talk will provide an overview of the LZ detector and a description of its backgrounds with an emphasis on techniques to constrain these backgrounds in situ. I will also discuss the first results from LZ and briefly discuss its future science program.

ZOOM Information –

Join Zoom Meeting

Meeting ID: 917 8226 8585


November 18, 2022
12:00 pm - 1:00 pm


Patrick McDonald


50A-5132- Sessler
50A-5132 Sessler Conference Room CA + Google Map

INPA guests from campus can now come to the lab early on Fridays. The INPA Common Room (50-5026) is reserved for our guests from 10:00 a.m. to 12:00 noon and from 1 p.m. to 5 p.m. Note that the seminars are now held in 50A-5132 to accommodate a more significant number of attendees.

CPTea Series (also known as INPA Tea Series)

The Physics Division CPTea Series invites you to an In-Person Tea Series 1st Friday of every month at 3:30 pm INPA Conference Room 50-5026.

Everyone is welcome to attend the open forum. Tea and light refreshments will be served.


INPA Common Room (50-5026)
3:30 pm

Access to the Lab

For a shuttle pass, please email Erica Hall. The pass is only valid for the day of the seminar.

Erica Hall