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RICH detector

RICH detector. Simon Swordy - PEBS meeting Jan 2009, CERN. Purpose: to provide mass resolution at high rigidity (>10GV). RICH volume. Gas RICH. ~0.8m. Position sensitive detector. Gas radiator. ~1m. Spherical mirror. Reflective Light Cone. 5mm. 3 x 3 mm 2 SiPM. Side view.

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RICH detector

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  1. RICH detector Simon Swordy - PEBS meeting Jan 2009, CERN

  2. Purpose: to provide mass resolution at high rigidity (>10GV) RICH volume

  3. Gas RICH ~0.8m Position sensitive detector Gas radiator ~1m Spherical mirror

  4. Reflective Light Cone 5mm 3 x 3 mm2 SiPM Side view Conceptual design of focal plane

  5. Injection molded 16ch unit VERITAS light cones (~3cm diameter) PEBS focal plane cones These cones ~30% efficient normalized by area ~5,000-10,000 elements for RICH ~3mm rms photon location ~300-600 module units

  6. Mirror options MAGIC telescope diamond cut metal mirrors Carbon foam base mirrors Also glass foam base cold slump mirrors, Can be made of astronomical quality

  7. Aerogel Detector Proximity focused Aerogel RICH

  8. Cerenkov quality factor N0 N=N0 x L(length) x sin2 N0 => integration over wavelength of detector QE, reflectivity, etc Best RICHs get N0~120 With these cones we lose light -> x 0.3 (ouch!) But SiPM QE is larger than typical PMT -> x 1.5 So possibly N0 for Z=1 ~60 But, for Z=2, N0 ~240 (~60 pe for gamma threshold of ~18)

  9. Rigidity resolution (blue) and RICH gamma resolution (red) 1.5TV, 5TV MDR (3mm res), N0=120, 60 N0=60 N0=120 1.5TV 5TV Assume radiator gas C4F10 threshold ~18

  10. 1.5TV, 5TV MDR (3mm res), N0=120, 60

  11. PEBS pbar mass resolution, MDR=5TV, N0=30, rms=3mm @ 80 ± 10 GeV Pi/Mu- K- pbar

  12. Separation He3/4 at 40±5 GeV/n N0 = 120, MDR=5TV, rms 3mm He4 He3

  13. Next steps: • Work with 3x3mm2 SiPMTs • Develop light cone geometry • Test manufacture cones, measure collection improvement • Electronics options • + 2010 • Mirror design • Vessel design

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