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May 21 – 26, 2017
Beijing International Convention Center
Asia/Shanghai timezone

Belle II iTOP optics: design, construction, and performance

May 24, 2017, 5:06 PM
Room 305C (Beijing International Convention Center)

Room 305C

Beijing International Convention Center

No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
oral Experimental detector systems R2-Experimental detector systems(4)


Dr Boqun Wang (University of Cincinnati)


The imaging-Time-of-Propogation (iTOP) counter is a new type of ring-imaging Cherenkov counter developed for particle identification at the Belle II experiment. It consists of 16 modules arranged azimuthally around the beam line. Each module consists of one mirror, one prism and two quartz bar radiators. Here we describe the design, acceptance test, alignment, gluing and assembly of the optical components. All iTOP modules have been successfully assembled and installed in the Belle II detector by the middle of 2016. After installation, laser and cosmic ray data have been taken to test the performance of the modules. First results from these tests will be presented.

Primary author

Dr Boqun Wang (University of Cincinnati)


Prof. Alan Schwartz (University of Cincinnati) Dr Bilas Pal (University of Cincinnati) Dr Saurabh Sandilya (University of Cincinnati)

Presentation materials