Cosmic-ray test of the installed endcap RPC modules in BELLE detector

Abe, Kazuo; Azuchi, S.; Hanada, H.; Haitani, F.; Hoshi, Y.; Igarashi, Y.; Inoue, Y.; Kawamura, N.; Nagamine, T.; Nakajima, Masayuki; Nakajima, Tetsuo; Nakano, E.; Neichi, K.; Sakai, Hiroshi; Takahashi, T.; Takayama, T.; Teramoto, Y.; Ueki, M.; Yamaga, M.; Yamaguchi, A.; Yuta, H.

doi:10.1109/23.819274

Cited by 13 publications

(4 citation statements)

References 4 publications

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“…Since the extrapolated track from the drift chamber is less accurate than the reconstructed MUC track because of larger multiscattering in the material between the drift chamber and the muon counter, we use the MUC track as the expected or predicted one. In a layer, the predicted hit location is calculated using a track that has been fitted by hits in all layers [7] except the current layer. When two or more adjacent strips in a layer have signals (multiplicity), the hit location used for particle tracking is averaged.…”

Section: Spatial Resolutionmentioning

confidence: 99%

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Study of BESIII MUC offline software with cosmic-ray data

et al. 2009

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Cosmic-ray data of 90 M events have been collected and used for calibration, alignment as well as detector tuning. A special tracking algorithm for the BES muon counter is developed and verified with Monte-Carlo simulation and then further confirmed with the cosmic-ray data. The obtained strip resolutions are in good agreement with the design values. A new alignment approach for the BES muon counter is confirmed with the cosmic-ray data and proposed to be used in future analysis of experimental data.

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Section: Spatial Resolutionmentioning

confidence: 99%

“…GAO Yuan-Ning( ) 5 HAN Lei( ) 6 HAN Shao-Qing( ) 7 HE Kang-Lin( ) 2 HE Miao( ) 2 HU Ji-Feng( ) 3 HU Xiao-Wei( ) 4 HUANG Bin( ) 2,3…”

mentioning

confidence: 99%

Study of BESIII MUC offline software with cosmic-ray data

et al. 2009

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“…Resistive Plate Chambers (RPC) have been proposed [1,2] and widely employed in High Energy Physics (HEP) experiments as they can provide fair spatial resolution and fast response in detecting charged particles over large areas at low cost. However, some recent applications have shown long term stability problems and severe limitations to their operability in streamer mode [3,4].…”

Section: Introductionmentioning

confidence: 99%

Analysis and interpretation of the performance degradation of glass Resistive Plate Chambers operated in streamer mode

Calcaterra¹,

Sangro²,

Patterí³

et al. 2007

J. Inst.

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The long-term stability of Resistive Plate Chambers (RPCs) with glass electrodes was studied for one year with a dedicated test station hosting about 10 m 2 of detectors. RPCs were operated in streamer mode with a ternary gas mixture containing argon (27%), isobutane (9%) and tetrafluoroethane (64%). Environmental conditions were kept under control and, in particular, the water pollution in the gas, deemed responsible for the degradation of glass RPC performance, was monitored never to exceed 30 ppm in the exhaust line. Evidence for a substantial aging of the detectors was observed, resulting in a loss of efficiency correlated to an increased rate of spurious streamers. This can be ascribed to the chemical attack of the glass surface by hydrofluoric acid formed in the streamer process, as confirmed by detailed morphological and chemical analyses of the electrode surface. Our results strengthen the indication that the instability of glass RPCs in the long term is related to the use of fluorocarbons as quenching medium and is not due to external pollutants.

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“…The butane and freon prevent a secondary streamer and the streamer size from spreading transversely, respectively, so both are generally needed to provide the stable operation with high efficiency. The RPC system with the HFC-134a mixture is successfully operated with highly efficient and stable performance in the streamer mode [2], [3], [4], [5], [6], [7]. The single RPC efficiency is 93%, and the superlayer module has been checked to achieve the design value of 99%.…”

Section: Introductionmentioning

confidence: 99%

A high rate gas mixture for glass RPC operated in streamer mode

Kikuchi

Ando

Fujikawa

et al.

IEEE Symposium Conference Record Nuclear Science 2004.

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In Belle, glass RPCs have operated in streamer mode with the Belle standard gas mixture. However, efficiencies of RPCs for the outermost few layers of the endcap region decrease from ∼95% to ∼50% due to hit-rate of 1.4 Hz/cm 2 from neutron backgroud originated from KEKB with higher beam current operation. To operate efficiently glass RPCs at this high background rate, high rate gas mixtures using SF6 have been tested. We report the performance of glass RPC.

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Cosmic-ray test of the installed endcap RPC modules in BELLE detector

Cited by 13 publications

References 4 publications

Study of BESIII MUC offline software with cosmic-ray data

Study of BESIII MUC offline software with cosmic-ray data

Analysis and interpretation of the performance degradation of glass Resistive Plate Chambers operated in streamer mode

A high rate gas mixture for glass RPC operated in streamer mode

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