Passive Gating Grid for Ion Back Flow Suppression in High Luminosity Collider Experiments

K. Dehmelt, P. Garg, T. K. Hemmick, A. Milov, E. Shulga, V. Zakharov

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Time Projection Chamber (TPC) is one of the main tracking systems for many current and future collider experiments at RHIC and LHC. It has a capability to measure the space points of charged tracks for good momentum resolution as well as the energy loss (dE/dx) for particle identification with good energy resolution. Both of these features depend strongly on the amount of space charge in the TPC gas volume, mainly due to the ions from the amplification stage. An active gating grid has been used thus far to gate the electrons and ions by switching the polarities of the grid wires. Therefore, active gating does introduce a limitation for data taking rates in high luminosity collisions. In this work we propose several options of a passive gating, where a significant reduction of Ion Back Flow (IBF) is possible in a high luminosity environment without any dead time issues due to gating operation. Particularly, the application of a TPC passive gating for the sPHENIX experiment at RHIC is presented, which is currently under development.

Original languageEnglish
Title of host publication2019 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)
PublisherIEEE Computer Society
Number of pages3
ISBN (Electronic)978-1-7281-4164-0
ISBN (Print)978-1-7281-4165-7
DOIs
StatePublished - 9 Apr 2020
EventIEEE Nuclear Science Symposium / Medical Imaging Conference (NSS/MIC) - Manchester
Duration: 26 Oct 20192 Nov 2019

Publication series

NameIEEE Nuclear Science Symposium and Medical Imaging Conference
ISSN (Print)1095-7863

Conference

ConferenceIEEE Nuclear Science Symposium / Medical Imaging Conference (NSS/MIC)
CityManchester
Period26/10/192/11/19

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