RPC performance at KLM/BELLE
نویسنده
چکیده
The RPC detectors in the KL-muon (KLM) subsystem of the Belle detector and their performance are described in this paper. The Belle RPCs are built using glass electrodes. This system has operated stably with very high detection efficiency and low dark current since June 1, 1999. r 2003 Elsevier Science B.V. All rights reserved. PACS: 29.40.Cs; 07.05.Hd
منابع مشابه
Resistive plate chambers in running and future experiments
This document surveys the RPC-based detection systems of running and future collider experiments focusing on the implications of the choice of some basic detector features: number of gaps, electrode material and operating mode. The muon identification systems of the B-factory experiments BaBar and Belle is described and the RPC performance since the first operation of the detectors is briefly r...
متن کاملMuon identification in the Belle experiment at KEKB
This paper describes the muon identification method and its performance in the Belle experiment at KEKB. Muon and hadron likelihood are calculated for each track using its range and transverse scattering in the KL-and-muon detector (KLM). We apply a cut on the normalized muon likelihood Lm to identify the track as a muon. Above the detection threshold of 0:6 GeV=c; the measured muon detection e...
متن کاملFreonless gas mixtures for glass RPC operated in streamer mode
We have operated successfully glass Resistive Plate Counters (RPC) at the BELLE experiment by using a nonflammable gas mixture of 30% argon, 8% butane-silver and 62% freon, HFC-134a. This freon is nonozone depleting freon, but a freon has a high global warming potential in general. Thus a gas mixture for RPC might be desired to be freonless in the near future. We have tested the performance of ...
متن کاملHot Topics from Belle
The year 2004 has seen a great number of important new results from Belle. Studies of timedependent asymmetries in B → ππ revealed the second observation of CP violation, and the first evidence for direct CP violation, in the B system [1]. More recently, further evidence for direct CP violation has been found in B → Kπ decays; this effect is also seen by BaBar [2]. The decay B → ππ is now obser...
متن کاملAdjuvant Effect of Leishmania major Promastigotes on the Immune Response of Mice to Ovalbumin
The immune responses of mice immunized with ovalbumin (OVA) together with killed L. major (KLM) promastigotes as adjuvant were studied. Three doses (5 × 107, 1 × 108 and 2 × 108) of KLM combined with OVA (100 mg) were injected into the groups of C57BL/6 mice. BCG and complete Freund’s adjuvant (CFA) were used as control adjuvants. Lymphocyte proliferation and antibody titers were determined, an...
متن کامل