The aging of wire chambers filled with dimethyl ether: wire and construction materials and freon impurities

Jibaly, M.; Majewski, S.; Chrusch, P.; Wojcik, Randolph; Sauli, F.; Gaudaen, J.

doi:10.1016/0168-9002(89)91442-3

Cited by 20 publications

(3 citation statements)

References 10 publications

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“…To stop the secondary effects in this case, one needs to add 20-30% of iC 4 H 10 . Aging in CF 4 +TMAE gas with a strong Fe 55 source in a small diameter tube chamber can also reveal another interesting effect: the current steadily increases as a function of the charge dose as the photosensitive film builds up on the cathode surface. To return to a "normal aging behavior," where the current decays away, one needs to add ~20% of iC 4 H 10 .…”

Section: Secondary Electron Emissionmentioning

confidence: 99%

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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: Secondary Electron Emissionmentioning

confidence: 99%

“…In this case, the problem was solved by coating the foil with ~90nm thick Cu/Au layer. Similarly, author's experience with a Fe 55 source-doped silver conducting paint applied on the jet chamber potential wires was equally negative [12]. This paint was applied to study the pulse propagation along the long wires.…”

Section: Secondary Electron Emissionmentioning

confidence: 99%

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

Va'Vra¹

2003

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“…However, the aging effects in DME appear to be highly sensitive to traces of pollutants at the ppb level, which are difficult to keep under control in large detectors. There is also evidence of high chemical reactivity of DME, which requires a careful material selection for detector assembly and gas system components [55].…”

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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