Title :
Measurement of vertical emittance at LEP from hard X-rays
Author :
Akbari, H. ; Borer, J. ; Bovet, C. ; Delmere, Ch. ; Manarin, A. ; Rossa, E. ; Sillanoli, M. ; Spanggaard, J.
Author_Institution :
SL Div., CERN, Geneva, Switzerland
Abstract :
Two solid state detectors measure in real time the vertical profiles of both beams in LEP, from hard X-rays produced in normal machine dipoles. Each detector consists of 64 elements of CdTe photoconductor deposited with a pitch of 100 pm on a ceramic support. Profiles can be recorded at the rate of bunch passages (88 kHz) for 250 revolutions and are subsequently analysed. This paper describes the new readout electronics adapted to 8 bunch operation of LEP and the performance of detectors using the data acquired in 1992. From the r.m.s. size of these profiles and the knowledge of machine optics, emittance values are obtained
Keywords :
electron accelerators; nuclear electronics; particle beam diagnostics; storage rings; synchrotrons; CdTe photoconductor; LEP; bunch passages; ceramic support; hard X-rays; machine dipoles; readout electronics; solid state detectors; vertical emittance measurement; Ceramics; Motion detection; Photoconductivity; Positrons; Readout electronics; Stimulated emission; Synchrotrons; Testing; X-ray detection; X-ray detectors;
Conference_Titel :
Particle Accelerator Conference, 1993., Proceedings of the 1993
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-1203-1
DOI :
10.1109/PAC.1993.309366
