Performance simulation studies for the ALICE TPC GEM upgrade

M. Ljunggren

doi:10.1016/j.nima.2015.12.059

Performance simulation studies for the ALICE TPC GEM upgrade

M. Ljunggren

Particle and nuclear physics

Research output: Contribution to journal › Article › peer-review

Abstract

To be able to exploit the anticipated interaction rate of 50 kHz in Pb-Pb collisions during run 3 of the LHC (beyond 2019), the ALICE TPC will be upgraded to allow continuous readout. As this is not possible with the current Multi Wire Proportional Chamber (MWPC) based amplification, the readout will be replaced with Gas Electron Multiplier (GEM) readout chambers that can suppress ~ 99% of the ion back flow. The space charge of the remaining 1% ion back flow, however, will cause significant distortions to the measured tracks of order cm. Simulation studies to characterize the distortions and test correction strategies have been performed, which show that the intrinsic momentum resolution, without these distortions, can be recovered.

Original language	English
Pages (from-to)	548-550
Number of pages	3
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	824
DOIs	https://doi.org/10.1016/j.nima.2015.12.059
Publication status	Published - 2016 Jul 11

Subject classification (UKÄ)

Subatomic Physics

Free keywords

GEM
Micro-pattern gas detectors
TPC
Tracking detectors

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10.1016/j.nima.2015.12.059

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title = "Performance simulation studies for the ALICE TPC GEM upgrade",

abstract = "To be able to exploit the anticipated interaction rate of 50 kHz in Pb-Pb collisions during run 3 of the LHC (beyond 2019), the ALICE TPC will be upgraded to allow continuous readout. As this is not possible with the current Multi Wire Proportional Chamber (MWPC) based amplification, the readout will be replaced with Gas Electron Multiplier (GEM) readout chambers that can suppress ~ 99% of the ion back flow. The space charge of the remaining 1% ion back flow, however, will cause significant distortions to the measured tracks of order cm. Simulation studies to characterize the distortions and test correction strategies have been performed, which show that the intrinsic momentum resolution, without these distortions, can be recovered.",

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author = "M. Ljunggren",

year = "2016",

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doi = "10.1016/j.nima.2015.12.059",

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T1 - Performance simulation studies for the ALICE TPC GEM upgrade

AU - Ljunggren, M.

PY - 2016/7/11

Y1 - 2016/7/11

N2 - To be able to exploit the anticipated interaction rate of 50 kHz in Pb-Pb collisions during run 3 of the LHC (beyond 2019), the ALICE TPC will be upgraded to allow continuous readout. As this is not possible with the current Multi Wire Proportional Chamber (MWPC) based amplification, the readout will be replaced with Gas Electron Multiplier (GEM) readout chambers that can suppress ~ 99% of the ion back flow. The space charge of the remaining 1% ion back flow, however, will cause significant distortions to the measured tracks of order cm. Simulation studies to characterize the distortions and test correction strategies have been performed, which show that the intrinsic momentum resolution, without these distortions, can be recovered.

AB - To be able to exploit the anticipated interaction rate of 50 kHz in Pb-Pb collisions during run 3 of the LHC (beyond 2019), the ALICE TPC will be upgraded to allow continuous readout. As this is not possible with the current Multi Wire Proportional Chamber (MWPC) based amplification, the readout will be replaced with Gas Electron Multiplier (GEM) readout chambers that can suppress ~ 99% of the ion back flow. The space charge of the remaining 1% ion back flow, however, will cause significant distortions to the measured tracks of order cm. Simulation studies to characterize the distortions and test correction strategies have been performed, which show that the intrinsic momentum resolution, without these distortions, can be recovered.

KW - GEM

KW - Micro-pattern gas detectors

KW - TPC

KW - Tracking detectors

U2 - 10.1016/j.nima.2015.12.059

DO - 10.1016/j.nima.2015.12.059

M3 - Article

AN - SCOPUS:84954306680

SN - 0168-9002

VL - 824

SP - 548

EP - 550

JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

ER -

Performance simulation studies for the ALICE TPC GEM upgrade

Abstract

Subject classification (UKÄ)

Free keywords

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