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RESEARCH PRODUCT
The RICH counter in the CERN hyperon beam experiment
Jürgen EngelfriedW. BeuschP. LennertJoachim HeintzeG. WälderH. W. SiebertS.g. GerassimovS. KluthH. RiesebergU. MüllerK. MartensS. LjungfeltR. Michaelssubject
PhysicsWire chamberNuclear and High Energy PhysicsPhotonLarge Hadron ColliderAtmospheric pressurePhysics::Instrumentation and DetectorsHyperonPhotoelectric effectCharged particleParticle detectorNuclear physicsVolume (thermodynamics)Measuring instrumentHigh Energy Physics::ExperimentDetectors and Experimental TechniquesAtomic physicsInstrumentationCherenkov radiationBeam (structure)description
Abstract The hyperon beam experiment WA89 at the CERN-SPS uses a ring imaging Cherenkov counter (RICH) for identification of secondaries from ∑ − N reactions. Cherenkov photons are generated in a 5 m long radiator volume filled with nitrogen at atmospheric pressure and detected in drift chambers. The drift chambers cover an active surface of 1.6 × 0.75 m 2 , with a maximum drift path of 41 cm. Photoelectrons are counted on 1280 wires with a pitch of 2.54 mm, equipped with multihit TDCs. The counting gas is ethane saturated with TMAE at 30°C. The counter was operated in two beam periods in 1990 and 1991. The spatial resolution of the chambers is better than 2 mm and under normal running conditions 14 photoelectrons per ring have been detected on average.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1992-12-01 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |