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Report on DIRC Radiator Y. Horii, Y. Koga, N. Kiribe 1 April 2011

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Contents 2 1. DIRC NOTE 40 (1996) 2. H. Kawaharas Report (1996) 3. DIRC NOTE 82 (1997) 4. SLAC-PUB (1997) 5. SLAC-PUB (1997) 6. DIRC NOTE 130 (2000) 7. DIRC NOTE 132 (2000) 8. DIRC NOTE 140 (2000) 9. SLAC-PUB (2001) 10. NIM (2003)

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1. DIRC NOTE 40 (1996) 3 Blue at 442 nm UV at 325 nm

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Bulk transmission 4 Quartz

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Surface reflectivity 5 x I 0-4 x I 0-4 > 99.9% ~ 10

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RTV coupling 6 RTV: RTV RTV Quartz Window No appreciable angular distortion

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Quartz Squareness Straightness MC non-squareness 2. H. Kawaharas Report (1996) 7

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Particle Track MC =1 nominal angle reconstructed angle c mean RMS Particle Track track mean RMS 8

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non-squareness Quartz ( ) RMS mean =0.5mrad RMS