Operational experience with the 4π ring imaging Cherenkov detector of DELPHI Adam, W; Albrecht, E; Allen, D ...
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment,
06/1995, Letnik:
360, Številka:
1-2
Journal Article, Conference Proceeding
Recenzirano
Odprti dostop
The ring imaging Cherenkov detector in the DELPHI Experiment at LEP allows hadron identification over a momentum range up to about 40 Gev/c over a near to 4π solid angle. Photons emitted by charged ...particles traversing gas and liquid radiators which are filled with UV-transparent perfluorocarbons, are used for Cherenkov angle reconstruction. Stable operation ensures that the detector is an efficient and powerful instrument. Monitoring of the detector parameters is of utmost importance to achieve good data quality and adequate data processing. The hadron identifying power of the ring imaging Cherenkov detector closely meets the main design values. Computerized control and monitoring features of the different subsystems will be presented. The interplay between detector parameters and the particle separating capacity of the detector will be discussed.
In the context of fusion research, cluster acceleration is being considered as a method for producing particle beams of high intensity in the energy range 0.1-1 keV/atom. An investigation of the ...neutralization of accelerated cluster ions on gas targets has shown that they disintegrate into neutral fragments with high efficiency. In general, cluster ions have a broad distribution of masses. As an example, the mass spectrum of a hydrogen cluster ion beam with a mean mass of 900 amu is presented.
One quarter of the Forward Ring Imaging Cherenkov (Forward RICH) detector has been installed and operated in the DELPHI experiment. The detector covers the forward-backward regions (15 degrees < ...theta <35 degrees ). Two radiator systems are used for particle identification in the momentum range up to 40 GeV/c, i.e., a liquid perfluorohexane and perfluorobutane gas. UV-photons with wavelengths from approximately 170 nm to approximately 200 nm (7.3-6.2 eV) are detected with high efficiency. The total active area of the photon detector is approximately 8 m/sup 2/.< >
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