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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VIRTUAL INPA SEMINAR | Alessio Porcelli (Ghent University)
July 9, 2021 @ 12:00 pm - 1:00 pm
Speaker: Alessio Porcelli (Ghent University)
Title: Method To Measure The Cosmic Rays Mass Composition With IceCube/IceTop
Abstract:
There is an intrinsic difficulty in measuring the mass of Cosmic rays at Ultra-High Energy. The only possible way involves measuring the Extensive Air Showers (EAS) characteristics produced by hadronic interactions of the incoming particle (primary) with the atmosphere: it behaves as a calorimeter producing secondary particles. EAS are characterized by a longitudinal profile along the shower development and a lateral one at the ground around the shower core. In the latter distribution, because of the shower physics, the information of the mass is delivered by the muon component.
IceTop is part of the IceCube experiment, sited at the geographic South Pole. While the latter consists of 86 strings drilled inside the ice covering a kilometer cube to detect neutrinos from astrophysical origins, the former are stations on the top of such strings used to veto atmospheric neutrinos. IceTop consists of 81 stations, each with two water Cherenkov detectors with two Photomultiplier Tubes each, able to detect Cherenkov light produced by the crossing charged particles. This setup of detectors can also be used to measure the EAS lateral distribution, letting IceCube be able to measure also Cosmic Rays with energies above 1 PeV and up to 1 EeV.
Two different approaches will be presented in the seminar, using IceTop alone or together with the in-ice part of IceCube. Moreover, improvement attempts will be depicted: analysis strategies and the incoming extension IceCube-Gen2.
Join Zoom Meeting
https://lbnl.zoom.us/j/93261885135?pwd=aFlsU1lHMGpHTE5SNlJaNTZENzBlQT09
Meeting ID: 932 6188 5135
Passcode: 113108
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)
Fridays
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.