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: Zhelei Xu (MIT) – Precision Cosmology: from CMB and 21cm

September 2, 2022 @ 12:00 pm - 1:00 pm

Date: Friday, September 2, 2022

Time: 12:00 pm – 1:00 pm

Location: Conference Room B50-5132

Speaker: Zhelei Xu (MIT)

Title: Precision Cosmology: from CMB and 21cm

This is a HYBRID Meeting: Please see ZOOM Information Below

ABSTRACT: Over the past decades, observations of the cosmic microwave background (CMB) have established the standard cosmological model. In the future, 21cm signals from neutral hydrogen have great potential for cosmological and astrophysical studies. In this talk, I will review the previous CMB observations and how it established the ΛCDM cosmology model. Then I will discuss the instrumentation and calibration of the Cosmology Large Angular Scale Surveyor (CLASS) and the Simons Observatory (SO). At the end, I will discuss how we can use the 21cm observation as a powerful probe to study cosmology, and introduce our novel mapping method for 21cm interferometric data.

Join Zoom Meeting

Meeting ID: 950 1669 6011
Passcode: 247722


September 2, 2022
12:00 pm - 1:00 pm


Joe DeRose – eMail:


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