Performance and Results of the RICH Detector for Kaon Physics in Hall A at Jefferson Lab.

Iodice, M. ; Cisbani, E. ; Colilli, S. ; Cusanno, F. ; Frullani, S.

Technical Information Center Oak Ridge Tennessee

关键词: Kaons;    Performance evaluation;    Physics;    Hadrons;    Photons;   

RP-ID  :  DE2006861949

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

A proximity focusing RICH detector has been constructed for the hadron High Resolution Spectrometer (HRS) of Jefferson Lab Experimental Hall-A. This detector is intended to provide excellent hadron identification up to a momentum of 2:5GeV=c. The RICH uses a 15mm thick liquid perfluorohexane radiator in proximity focusing geometry to produce Cherenkov photons traversing a 100mm thick proximity gap filled with pure methane and converted into electrons by a thin film of CsI deposited on the cathode plane of a MWPC. The detector has been successfully employed in the fixed target, high luminosity and high resolution hypernuclear spectroscopy experiment. With its use as a kaon identifier in the 2GeV=c region, the very large contribution from pions and protons to the hypernuclear spectrum was reduced to a negligible level. The basic parameters and the resulting performance obtained during the experiment are reported in this paper.