Analysis of organic compounds formed in electron avalanches in a proportional counter filled with Ar/C2H4 gas mixture

Kurvinen, K.; Ojala, J.; Särme, Timo

doi:10.1016/j.nima.2003.08.138

Cited by 4 publications

(3 citation statements)

References 5 publications

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“…The identification of radicals and fragments formed in the electron avalanches is a means to understand and eventually overcome the problems related to the aging of gaseous detectors [3,[66][67][68]. A recent investigation of avalanche products has shown that seventeen new compounds were identified in the effluent gas stream from an irradiated proportional counter with Ar/C 2 H 4 (50:50) mixture [69]. Some of the observed species (aliphatic hydrocarbons) contained double or triple bonds which, similar to plasma polymerization, can be easily 'opened' in the discharges and polymerize very aggressively.…”

Section: Experience From Laboratory R and D Experimentsmentioning

confidence: 99%

ICFA Instrumentation Bulletin, Volume 24, Spring 2002 Issue (SLAC-J-ICFA-024)

Va'Vra¹

2003

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The aging phenomena are very complex physical and chemical processes. The author attempts to qualitatively discuss various physical processes contributing to aging. The satisfactory quantitative explanation is not presently available. In this sense, there is little progress made since the 1986 LBL Aging Workshop. However, what was accomplished during the past decade is a heightened awareness from the research and management sides to pay more attention to this problem, and as a result a number of aging tests have increased in quantity and quality. These efforts will undoubtedly yield some new results in the future. Examples in this paper are mainly from a "pre-LHC and pre-HERA-B era of aging," where the total charge dose is limited to much less than one C/cm.

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Section: Experience From Laboratory R and D Experimentsmentioning

confidence: 99%

ICFA Instrumentation Bulletin, Volume 24, Spring 2002 Issue (SLAC-J-ICFA-024)

Va'Vra¹

2003

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show abstract

“…A recent investigation of avalanche products has shown that seventeen new compounds were identified in the effluent gas stream from an irradiated proportional counter with Ar/C 2 H 4 (50:50) mixture [69]. Some of the observed species (aliphatic hydrocarbons) contained double or triple bonds which, similar to plasma polymerization, can be easily 'opened' in the discharges and polymerize very aggressively.…”

Section: Experience From Laboratory R and D Experimentsmentioning

confidence: 99%

“…The identification of radicals and fragments formed in the electron avalanches is a means to understand and eventually overcome the problems related to the aging of gaseous detectors [3], [66], [67], [68]. A recent investigation of avalanche products has shown that seventeen new compounds were identified in the effluent gas stream from an irradiated proportional counter with Ar/C 2 H 4 (50:50) mixture [69]. Some of the observed species (aliphatic hydrocarbons) contained double or triple bonds which, similar to plasma polymerization, can be easily 'opened' in the discharges and polymerize very aggressively.…”

Section: Experience From Laboratory R and D Experimentsmentioning

confidence: 99%

Summary and outlook of the international workshop on aging phenomena in gaseous detectors (DESY, Hamburg, October 2001)

Titov

Hohlmann

Aranda

et al. 2002

IEEE Trans. Nucl. Sci.

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High Energy Physics experiments are currently entering a new era which requires the operation of gaseous particle detectors at unprecedented high rates and integrated particle fluxes. Full functionality of such detectors over the lifetime of an experiment in a harsh radiation environment is of prime concern to the involved experimenters. New classes of gaseous detectors such as large-scale straw-type detectors, Micro-pattern Gas Detectors and related detector types with their own specific aging effects have evolved since the first workshop on wire chamber aging was held at LBL, Berkeley in 1986. In light of these developments and as detector aging is a notoriously complex field, the goal of the workshop was to provide a forum for interested experimentalists to review the progress in understanding of aging effects and to exchange recent experiences.A brief summary of the main results and experiences reported at the 2001 workshop is presented, with the goal of providing a systematic review of aging effects in state-of-the-art and future gaseous detectors.

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Fundamental understanding of aging processes: review of the workshop results

Sauli

2003

Nuclear Instruments and Methods in Physics Research Section A:

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Analysis of organic compounds formed in electron avalanches in a proportional counter filled with Ar/C2H4 gas mixture

Cited by 4 publications

References 5 publications

ICFA Instrumentation Bulletin, Volume 24, Spring 2002 Issue (SLAC-J-ICFA-024)

ICFA Instrumentation Bulletin, Volume 24, Spring 2002 Issue (SLAC-J-ICFA-024)

Summary and outlook of the international workshop on aging phenomena in gaseous detectors (DESY, Hamburg, October 2001)

Fundamental understanding of aging processes: review of the workshop results

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