1. DPG 2004 Köln C. Schwarz Particle Identification with the PANDA detector at GSI C.Schwarz, GSI

2. DPG 2004 Köln C. Schwarz Charged particle identification with PANDA How to perform PID within a magnetic field in front of an EMC as compact as possible (material, costs) DIRC For p~GeV: SiO 2 (n=1.47) Aerogel, C 6 F 14 (n=1.02, 1.24) target B

3. DPG 2004 Köln C. Schwarz Ring Imaging Cherenkov Detectors RICH RICH DIRC Detecting Internally Reflected Cherenkov light PID: tracking  p, RICH    m pin point focus (camera obscura)

4. DPG 2004 Köln C. Schwarz DIRC less space than aerogels costs of calorimeter no problems with field Detecting Internally Reflected Č-light (exsting at BaBar) 10000 PMTs !

5. DPG 2004 Köln C. Schwarz DIRC K eff.  miss-id. reaction pp   at  s = 3.6 GeV/c 2 degree K eff.  miss-id. reaction pp   at  s = 3.6 GeV/c 2 degree  2 /n=2.4 pion  =0.9745 47 photons

6. DPG 2004 Köln C. Schwarz DIRC Time Of Propagation  T, T2 T1 (discussed at Belle)  reduced # of PMT for Kaon PID  very good time resolution required (~ 100 ps)

7. DPG 2004 Köln C. Schwarz Mechanical radiator quality Edge losses Edge thickn. Sharpness of edges should be  50  m Needs special care for handling

8. DPG 2004 Köln C. Schwarz Mechanical support quartz slabs embedded in honeycomb structure

9. DPG 2004 Köln C. Schwarz Photon detector candidate: PMT-MCP Photocathode pixelized photoanode MCP glass tube works up to 2.2 Tesla amplification up to 10 7 Anashin et al. NIMA 504 (2003) 276

10. DPG 2004 Köln C. Schwarz Summary ● DIRC allows for compact PID ● Simulations show good  /K separation ● Timing information might help to reduce number of PMT ● A possible photon detector is PMT-MCP