1

Report on DIRC RadiatorY. Horii, Y. Koga, N. Kiribe1April 2011Contents2DIRC NOTE 40 (1996)H. Kawaharas Report (1996)DIRC NOTE 82 (1997)SLAC-PUB (1997)SLAC-PUB (1997)DIRC NOTE 130 (2000)DIRC NOTE 132 (2000)DIRC NOTE 140 (2000)SLAC-PUB (2001)NIM (2003)1. DIRC NOTE 40 (1996)3

Blue at 442 nmUV at 325 nmBulk transmission4

QuartzSurface reflectivity5x

I0-4x

I0-4

> 99.9% ~ 10RTV coupling6

RTV: RTV

RTVQuartzWindowNo appreciable angular distortion

QuartzSquarenessStraightnessMCnon-squareness 2. H. Kawaharas Report (1996)7

Particle TrackMC=1nominal angle reconstructed angle

cmeanRMSParticleTracktrackmeanRMS8

non-squarenessQuartz()

RMSmean=0.5mradRMS