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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[UPDATE] VIRTUAL INPA SEMINAR | Sherry Song (Princeton University)

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

Location: via Zoom

Speaker: Sherry Song (Princeton University)

Title: Integration and Analysis of the Balloon-borne Telescope, SPIDER


Ever 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.

Each 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.

My 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.
Join Zoom Meeting
Meeting ID: 916 6626 2470
Passcode: 923119


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

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