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The Poor Man’s RICH Concept: A One-Dimensional Dual Radiator RICH

The Poor Man’s RICH Concept: A One-Dimensional Dual Radiator RICH. Joerg Reinhold Florida International University, Miami presented at Hall C Summer Workshop August 7, 2009. A “poorly” funded pet project in collaboration with. Michael Carl, FIU M.S. 2003

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The Poor Man’s RICH Concept: A One-Dimensional Dual Radiator RICH

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  1. The Poor Man’s RICH Concept: A One-Dimensional Dual Radiator RICH Joerg Reinhold Florida International University, Miami presented at Hall C Summer Workshop August 7, 2009

  2. A “poorly” funded pet projectin collaboration with • Michael Carl, FIU M.S. 2003 M. Carl, J. Reinhold, et. al., NIM A527 (2004) 301. • Brian Beckford, FIU M.S. 2008 • Naipy Perez, FIU M.S. 2006 • Tohoku University Joerg Reinhold, FIU

  3. Cherenkov Radiation TriviaPrediction 1889? Noble Prize in Physics 1958 Oliver Heaviside Pavel Alekseyevich Cherenkov Il´ja Mikhailovich Frank Igor Yevgenyevich Tamm See e.g. O. Heaviside, Electromagnetic Theory (Chelsea Publishing Company, New York, 1971) Cerenkov, C. R. Ac. Sci. U.S.S.R. 8, 451 (1934) Frank and Tamm, C. R. Ac. Sci. U.S.S.R. 14, 109 (1937) Joerg Reinhold, FIU

  4. Motivation: Jefferson Lab at 12 GeVPID with Cherenkov detectors Joerg Reinhold, FIU

  5. Ring Imaging Cherenkov Detector (RICH) Image from P.A. Cerenkov, Radiation of Particles Moving at a velocity exceeding that of light, and some of the possibilities for their use in Experimental Physics. Nobel Lecture (1958). Joerg Reinhold, FIU

  6. Ring Imaging Cherenkov Detector (RICH) Joerg Reinhold, FIU

  7. Ring Imaging Cherenkov Detector (RICH) Example: 1m x 1m area 1cm2 pads => 10,000 channels 1cm stripes w/2-sided readout => 200 channels Joerg Reinhold, FIU

  8. Nuclear Instruments and Methods in Physics Research A333 (1993) 458-463North-HollandA RICH detector for velocity determination of heavy ionsK. Zeitelhack, J. Friese, HA. Körner, J. Reinhold and R. SchneiderPhysik-Department E12, TU München, Germany Joerg Reinhold, FIU

  9. Poor Man’s RICH Concept Joerg Reinhold, FIU

  10. Wavelength Shifter PropertiesCharles Hurlbut, ELJEN Technology, Sweetwater TX, www.eljentechnology.com, private communication Waveshifting quantum efficiency ~ 84%. Joerg Reinhold, FIU

  11. KEK PS Experiment T554 • 30 cm x 10 cm x 1 cm WLS • 2 5-inch PMTs (Photonis) • 8-mm fused silica radiator • Hadron beam line with p, K,  up to 2 GeV/c • Scintillator TOF for PID Joerg Reinhold, FIU

  12. T554 Results Joerg Reinhold, FIU

  13. T554 Results w/out reflection losses at radiator/air & air/WLS boundaries Joerg Reinhold, FIU

  14. T554 Results: Discussion • Digitized Q.E.s & transm. • Fold with Cherenkov spectrum • Expect coll~65% Agrees with external collection However internal ~41%?? • Need to study theory of Cherenkov in absorbing media Joerg Reinhold, FIU

  15. Monte Carlo Simulation • 10 cm n=1.015 aerogel radiator • 100 cm distance aerogel-WLS • 50 WLS bars, 1 cm wide • coll=61.5% Joerg Reinhold, FIU

  16. MC Disributions & Likelihood PID Joerg Reinhold, FIU

  17. PID Efficiencies: 10 cm n=1.015 protons kaons pions Joerg Reinhold, FIU

  18. Distributions at p=12 GeV10 cm n=1.015 aerogel radiator   K K p p Joerg Reinhold, FIU

  19. Dual Radiator10 cm n=1.015 & 100 cm C4F10 proton kaon pion Joerg Reinhold, FIU

  20. Comparison with other RICH [14] N. Akopov et al. The HERMES dual-radiator ring imaging Cherenkov detector. Nuc. Inst. Meth. Phys. Res. 479 (2002) 511-530. [37] P. Di Nezza, Hadron Suppression in DIS at HERMES. J.Phys.G: Nucl.Part.Phys.30(2004)S783-S790. [38] K.Suetsugu, Performance of Pion and proton identication with Ring Imaging Cerenkov Counter of HERMES. Master's thesis, Tokyo (February 2001). DESYTHESIS-2001-016. [40] A. Papanestis, The Ring Imaging Cherenkov Detectors for LHCb. International Europhysics Conference on High Energy Physics, PoS(HEP2005)375. [41] E. Nappi, Particle Identication Techniques. PhD Dissertation, 2005. Joerg Reinhold, FIU

  21. Summary & Outlook • WLS collection efficiency ~ 62% • 1-dim RICH w/PID comparable to existing RICH • WLS are low-cost options for large area segmented photon collectors • Need more realistic MC: angular distributions, Rayleigh scattering, … • Measure coll for thin long WLS Joerg Reinhold, FIU

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