P. Michel et al., MARS - A START DETECTOR SYSTEM FOR THE COSY TIME-OF-FLIGHT SPECTROMETER TOF, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 408(2-3), 1998, pp. 453-467
A start detector system (MARS) was developed far the time-of-flight sp
ectrometer TOF at the external beam of the cooler synchrotron COSY. Th
e start detector system is specially tailored to the measurement of th
e proton-proton bremsstrahlung, but it can also be used for the invest
igation of other reactions. The MARS detector system consists of two 1
6-fold segmented rings of plastic scintillators with 500 mu m thicknes
s embedded in specially formed hollow light guides. According to simul
ation calculations and test measurements the light transmission of the
se light guides amounts to about 40%. The time resolution for minimum
ionizing particles was determined to be 0.5 ns (FWHM). (C) 1998 Elsevi
er Science B.V. All rights reserved.