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A Scintillating Fiber Hodoscope for a Bremstrahlung Luminosity Monitor at an Electron$-$Positron Collider

D. H. Brown·D. H. Orlov·G. S. Varner·W. A. Worstell·S. I. Redin
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Abstract

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.

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D. H. Brown, D. H. Orlov, G. S. Varner, W. A. Worstell, S. I. Redin. 1996-07-15. A Scintillating Fiber Hodoscope for a Bremstrahlung Luminosity Monitor at an Electron$-$Positron Collider. https://doi.org/10.1063/1.1147108

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