Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
1996-07-15
Rev.Sci.Instrum. 67 (1996) 2780-2787
Physics
High Energy Physics
High Energy Physics - Experiment
LaTeX with REVTeX style and options: multicol,aps. 8 pages, postscript figures separate from text. Accepted in Review of Scien
Scientific paper
10.1063/1.1147108
The performance of a scintillating fiber (2mm diameter) position sensitive detector ($4.8 \times 4.8$ cm$^2$ active area) for the single bremstrahlung luminosity monitor at the VEPP-2M electron-positron collider in Novosibirsk, Russia is described. Custom electronics is triggered by coincident hits in the X and Y planes of 24 fibers each, and reduces 64 PMT signals to a 10 bit (X,Y) address. Hits are accumulated (10 kHz) in memory and display (few Hz) the VEPP-2M collision vertex. Fitting the strongly peaked distribution ( $\sim$ 3-4 mm at 1.6m from the collision vertex of VEPP-2M ) to the expected QED angular distribution yields a background in agreement with an independent determination of the VEPP-2M luminosity.
Brown David H.
Orlov D. H.
Redin S. I.
Varner Gary S.
Worstell W. A.
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