Preliminary results from the ROC-Europe transition radiation experiment with a multichannel superheated superconducting grain detector

• Published in: Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 444; no. 1; pp. 289 - 292
• Main Authors: Yuan, L.C.L, Huang, C.Y, Lee, S.C, Chen, C, Chan, A.W, Hou, S, Chang, Y.H, Teng, P.K, Jeudy, V, Perrier, P, Bonierbale, P, Limagne, D, Bruère-Dawson, R, Girard, T.A, Collar, J.I, Jin, Y, Waysand, G
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 2000
• ISSN: 0168-9002; 1872-9576
• DOI: 10.1016/S0168-9002(99)01398-4

A compact multichannel Superheated Superconducting Grain detector (SSG) has been irradiated by the T9 beam (mostly composed by high energy electrons) of the SPS machine at CERN. The SSG detector consists of a set of cylindrical suspensions of tin grains with various filling factors, all of them parallel to the beam line and kept in an
3
He–
4
He
single-dilution chamber. Transitions to the normal state of the grains were detected with a GaAs high electron mobility field effect transistor (HEMFET) preamplifier cooled to 4.2
K. We present a preliminary analysis of the results obtained with beam energies from 1 to 14
GeV and a 33–37
μm size distribution of the grains.