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Title: Absolute position measurement in a gas time projection chamber via transverse diffusion of drift charge

Abstract

Time Projection Chambers (TPCs) with charge readout via micro pattern gaseous detectors can provide detailed measurements of charge density distributions. We here report on measurements of alpha particle tracks, using a TPC where the drift charge is amplified with Gas Electron Multipliers and detected with a pixel ASIC. We find that by measuring the 3-D topology of drift charge and fitting for its transverse diffusion, we obtain the absolute position of tracks in the drift direction. For example, we obtain a precision of 1~cm for 1~cm-long alpha track segments. To our knowledge this is the first demonstration of such a measurement in a gas TPC. This technique has several attractive features: it does not require knowledge of the initial specific ionization, is robust against bias from diffuse charge below detection threshold, and is also robust against high charge densities that saturate the detector response.

Authors:
ORCiD logo [1];  [1];  [1];  [1]; ORCiD logo [1];  [1]
  1. Univ. of Hawaii, Honolulu, HI (United States)
Publication Date:
Research Org.:
Univ. of Hawaii, Honolulu, HI (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
OSTI Identifier:
1598671
Alternate Identifier(s):
OSTI ID: 1247393
Grant/Contract Number:  
SC0010504; SC0007852
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 789; Journal Issue: C; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY

Citation Formats

Lewis, P. M., Vahsen, S. E., Seong, I. S., Hedges, M. T., Jaegle, I., and Thorpe, T. N. Absolute position measurement in a gas time projection chamber via transverse diffusion of drift charge. United States: N. p., 2015. Web. doi:10.1016/j.nima.2015.03.024.
Lewis, P. M., Vahsen, S. E., Seong, I. S., Hedges, M. T., Jaegle, I., & Thorpe, T. N. Absolute position measurement in a gas time projection chamber via transverse diffusion of drift charge. United States. https://doi.org/10.1016/j.nima.2015.03.024
Lewis, P. M., Vahsen, S. E., Seong, I. S., Hedges, M. T., Jaegle, I., and Thorpe, T. N. Sat . "Absolute position measurement in a gas time projection chamber via transverse diffusion of drift charge". United States. https://doi.org/10.1016/j.nima.2015.03.024. https://www.osti.gov/servlets/purl/1598671.
@article{osti_1598671,
title = {Absolute position measurement in a gas time projection chamber via transverse diffusion of drift charge},
author = {Lewis, P. M. and Vahsen, S. E. and Seong, I. S. and Hedges, M. T. and Jaegle, I. and Thorpe, T. N.},
abstractNote = {Time Projection Chambers (TPCs) with charge readout via micro pattern gaseous detectors can provide detailed measurements of charge density distributions. We here report on measurements of alpha particle tracks, using a TPC where the drift charge is amplified with Gas Electron Multipliers and detected with a pixel ASIC. We find that by measuring the 3-D topology of drift charge and fitting for its transverse diffusion, we obtain the absolute position of tracks in the drift direction. For example, we obtain a precision of 1~cm for 1~cm-long alpha track segments. To our knowledge this is the first demonstration of such a measurement in a gas TPC. This technique has several attractive features: it does not require knowledge of the initial specific ionization, is robust against bias from diffuse charge below detection threshold, and is also robust against high charge densities that saturate the detector response.},
doi = {10.1016/j.nima.2015.03.024},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = C,
volume = 789,
place = {United States},
year = {Sat Mar 21 00:00:00 EDT 2015},
month = {Sat Mar 21 00:00:00 EDT 2015}
}

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Cited by: 13 works
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