Study of the effect of water vapor on a glass RPC with and without freon

Kubo, T.; Sakaue, H.; Teramoto, Y.; Nakano, E.; Takahashi, T.

doi:10.1016/s0168-9002(03)01276-2

Cited by 15 publications

(4 citation statements)

References 4 publications

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“…After the wet gas operation in C 2 H 2 F 4 both anode and cathode got damaged; the anode surface had a high level of fluoride, while the cathode lacked sodium. The authors explained the symptoms of aged chambers by spontaneous field emission of electrons from local deposits/tips on the cathode surface [90,91]. In one test, the area with reduced efficiency was clearly located along the preferential path of the gas flow [92].…”

Section: Aging In Resistive Plate Chambers (Rpc)mentioning

confidence: 99%

“…In one test, the area with reduced efficiency was clearly located along the preferential path of the gas flow [92]. It has to be noted, that ammonia flushing allows full recovery of the damaged glass chamber [91]. However, the glass RPC can suffer from the longterm instability due to the migration of alkali ions, which will lead to the permanent increase of the surface resistance.…”

Section: Aging In Resistive Plate Chambers (Rpc)mentioning

confidence: 99%

See 1 more Smart Citation

Radiation Damage and Long-Term Aging in Gas Detectors

Titov

2004

Innovative Detectors for Supercolliders

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Aging phenomena constitute one of the most complex and serious potential problems which could limit, or severely impair, the use of gaseous detectors in unprecedented harsh radiation environments. Long-term operation in high-intensity experiments of the LHC-era not only demands extraordinary radiation hardness of construction materials and gas mixtures but also very specific and appropriate assembly procedures and quality checks during detector construction and testing. Recent experimental data from hadron beams is discussed. It is shown that the initial stage of radiation tests, usually performed under isolated laboratory conditions, may not offer the full information needed to extrapolate to the long-term performance of real and full-size detectors at high energy physics facilities. Major factors, closely related to the capability of operating at large localized ionization densities, and which could lead to operation instabilities and subsequent aging phenomena in gaseous detectors, are summarized. Finally, an overview of aging experience with state-of-the-art gas detectors in experiments with low-and high-intensity radiation environments is given with a goal of providing a set of rules, along with some caveat, for the construction and operation of gaseous detectors in high luminosity experiments.

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Section: Aging In Resistive Plate Chambers (Rpc)mentioning

confidence: 99%

Section: Aging In Resistive Plate Chambers (Rpc)mentioning

confidence: 99%

Radiation Damage and Long-Term Aging in Gas Detectors

Titov

2004

Innovative Detectors for Supercolliders

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“…The collaboration has chosen 2 × 2 m 2 size glass Resistive Plate Chambers (RPCs) as the active detector elements and is going to deploy 28,800 of them in the ICAL detector [1]. The RPCs will be operated in the avalanche mode with an optimized gas mixture of C 2 H 2 F 4 /iso-C 4 H 10 /SF 6 = 95.2/4.5/0.3 [2]. The experiment is expected to run for more than 10 years in order to record statistically significant number of neutrino interactions for the confirmation of atmospheric neutrino oscillation.…”

Section: Introductionmentioning

confidence: 99%

“…In spite of stringent QC during the RPC gas gap making or gas lines plumbing, it is impossible to prevent ambient air or water vapor entering into the gas circuit over these long periods of time. The contaminants are known cause for serious degradation in the performance or permanent damage of the RPCs [3][4][5].…”

Section: Introductionmentioning

confidence: 99%