Vf. Konstantinov et al., BEAM TESTS OF SPACAL-TYPE MODULES FOR A HIGH-PRESSURE GAS CALORIMETER, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 397(2-3), 1997, pp. 283-291
High-pressure gas modules with cylindrical ionization chambers for a V
ery Forward Calorimeter (VFC) were constructed and tested in the U-70
electron beam of IHEP (Protvino). The read-out amplifiers were used in
a remote mode (3 m long cables were used to connect the detector to t
he amplifier). The module performance was tested in the shower energy
range 10-30 GeV employing different gas mixtures (Ar + CH4, Ar + CF4 a
nd pure CF4) at the pressure of 20-40 atm. The energy resolution sigma
(E)/E = 18% is reached at the angle of 5.7 degrees for 30 GeV incident
electrons. The design was found to be adequate for a future use at LH
C.