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DOE OSTI · 1043191

The Focusing DIRC with Waveform Digitizing Electronics

Ruckman, L L·Nishimura, K·Varner, G S·Vavra, J·Aston, D·Leith, D W.G.S.·Ratcliff, B
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Abstract

We have tested a novel Cherenkov imaging detector called the Focusing DIRC (FDIRC) with waveform digitizing electronics. The prototype's concept is based on the BaBar DIRC with several important improvements: (a) much faster, pixelated photon detectors, (b) a mirror that makes the photon detector smaller and less sensitive to background in future applications, and (c) electronics capable of measuring single photon resolution to {sigma} {approx} 150 ps, which allows for correction due to chromatic error. In this test, the prototype has been instrumented with seven Hamamatsu H-8500 MaPMTs. Waveforms from {approx}450 pixels are digitized with waveform sampling electronics based on the BLAB2 ASIC, operating at a sampling speed of {approx}2.5 GSa/s. This version of the FDIRC prototype was tested in a large cosmic ray telescope providing muon tracks with {approx}1 mrad angular resolution and a muon momentum cutoff of {ge} 1.6 GeV/c.

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46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGYCHERENKOV COUNTERSFOCUSINGInstrumentation,INSTMIRRORSMUONSPARTICLE IDENTIFICATIONPHOTONSPHYSICSRESOLUTIONSAMPLINGTELESCOPESVELOCITYWAVE FORMS

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Ruckman, L L, Nishimura, K, Varner, G S, Vavra, J, Aston, D, Leith, D W.G.S., Ratcliff, B. 2012-06-15. The Focusing DIRC with Waveform Digitizing Electronics. https://www.osti.gov/biblio/1043191

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