Differences in the response of two light guide technologies and two readout technologies after an exchange of liquid argon in the dewar
Abstract
In this investigation the response to the scintillation light generated by through-going cosmic muons in liquid argon (LAr) was measured by two light guide technologies and two readout technologies after five weeks of running in the TallBo dewar at Fermilab. The response was remeasured after the dewar was drained of LAr, refilled, and then run again for an additional four weeks. After the dewar was refilled, there was clear evidence that the scintillation signal had dropped significantly. The two light guide technologies were developed at Indiana University and MIT/Fermilab. The two readout technologies were boards that passively or actively ganged 12 Hamamatsu MPPCs. Two possible explanations were identified for the degraded signal: the response of the two light guide technologies degraded due to damage caused by thermal cycling, and/or unknown differences in the trace residual Xe contamination in the fills of LAr led to the observed drop in scintillation light. Neither absorption nor quenching by N2, O2, and H2O contamination can account for the degradation. Neither the individual Hamamatsu MPPCs nor the passive/active ganging boards appear to have been affected by the thermal cycling. The path length distributions of the cosmics traversing the dewar appear quite similar in both eventmore »
- Authors:
-
- Indiana Univ., Bloomington, IN (United States)
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Publication Date:
- Research Org.:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1631139
- Alternate Identifier(s):
- OSTI ID: 1776925
- Report Number(s):
- arXiv:1912.05987; FERMILAB-PUB-19-624-PPD-SCD
Journal ID: ISSN 0168-9002; oai:inspirehep.net:1770444; TRN: US2200746
- Grant/Contract Number:
- AC02-07CH11359
- 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: 976; 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; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Mufson, S., Adams, B., Baugh, B., Howard, B., Macias, C., Cancelo, G., Niner, E., and Totani, D. Differences in the response of two light guide technologies and two readout technologies after an exchange of liquid argon in the dewar. United States: N. p., 2020.
Web. doi:10.1016/j.nima.2020.164240.
Mufson, S., Adams, B., Baugh, B., Howard, B., Macias, C., Cancelo, G., Niner, E., & Totani, D. Differences in the response of two light guide technologies and two readout technologies after an exchange of liquid argon in the dewar. United States. https://doi.org/10.1016/j.nima.2020.164240
Mufson, S., Adams, B., Baugh, B., Howard, B., Macias, C., Cancelo, G., Niner, E., and Totani, D. Wed .
"Differences in the response of two light guide technologies and two readout technologies after an exchange of liquid argon in the dewar". United States. https://doi.org/10.1016/j.nima.2020.164240. https://www.osti.gov/servlets/purl/1631139.
@article{osti_1631139,
title = {Differences in the response of two light guide technologies and two readout technologies after an exchange of liquid argon in the dewar},
author = {Mufson, S. and Adams, B. and Baugh, B. and Howard, B. and Macias, C. and Cancelo, G. and Niner, E. and Totani, D.},
abstractNote = {In this investigation the response to the scintillation light generated by through-going cosmic muons in liquid argon (LAr) was measured by two light guide technologies and two readout technologies after five weeks of running in the TallBo dewar at Fermilab. The response was remeasured after the dewar was drained of LAr, refilled, and then run again for an additional four weeks. After the dewar was refilled, there was clear evidence that the scintillation signal had dropped significantly. The two light guide technologies were developed at Indiana University and MIT/Fermilab. The two readout technologies were boards that passively or actively ganged 12 Hamamatsu MPPCs. Two possible explanations were identified for the degraded signal: the response of the two light guide technologies degraded due to damage caused by thermal cycling, and/or unknown differences in the trace residual Xe contamination in the fills of LAr led to the observed drop in scintillation light. Neither absorption nor quenching by N2, O2, and H2O contamination can account for the degradation. Neither the individual Hamamatsu MPPCs nor the passive/active ganging boards appear to have been affected by the thermal cycling. The path length distributions of the cosmics traversing the dewar appear quite similar in both event samples.},
doi = {10.1016/j.nima.2020.164240},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = C,
volume = 976,
place = {United States},
year = {Wed Jun 10 00:00:00 EDT 2020},
month = {Wed Jun 10 00:00:00 EDT 2020}
}
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