[Jlab-seminars] Physics Seminar Announcement

[Luci Collins]

*Physics Seminar
**March 28, 2012
11:00 AM
F113
Cookies and Coffee 10:45AM
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*Jochen Schwiening
GSI Darmstadt, Germany *

*"DIRC Detectors: from BaBar to PANDA and Beyond" *

Particle identification (PID) is a key requirement for many modern 
high-energy physics experiments. Ring Imaging Cherenkov (RICH) detectors 
are capable of providing excellent hadronic PID for a wide range of 
particle momenta. A DIRC (Detection [of] Internally Reflected Cherenkov 
[light]) is a distinctive, compact RICH subtype first used in the BaBar 
detector. It uses flat, rectangular cross section Cherenkov radiators 
made from a solid material, typically fused silica, to generate 
Cherenkov light and transport it by total internal reflection to the 
photon detectors. The successful operation of the BaBar DIRC from 
1999-2008, which achieved pi/K separation of 2.5 standard deviations or 
more up the 4 GeV/c momentum with high efficiency and purity, motivated 
a number of R&D efforts to further improve on the BaBar DIRC design and 
extend the DIRC range to higher momenta. After an introduction to the 
basic principles of DIRC detectors I will discuss the experience with 
the BaBar DIRC and review the design of the DIRC counters at the Belle 
II, SuperB, and PANDA experiments as well as R&D ideas for DIRC systems 
at future experiments such as the EIC central detector.




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