PANDA

1
PANDA
2
PANDA 1 Cerenkov Imaging Detectors

• Design and prototyping of RICH subdetectors for
  the PANDA experiment.
• Barrel DIRC
• RD on quality of radiator slabs (fused quartz)
• RD on simplification of readout by using timing
  information (Time of propagation) and
  1-dimensional spatial information
• Endcap RICH
• RD on using the DIRC principle.

3
GSI test box for light attenuation

• for long bars and internal reflection
• temperature controlled (dT lt 0.1oC)

35mm
14mm
4
Uni Mainz TOF tests
Measure exit angle to improve timing resolution
S. Sanchez, Uni Mainz
5
Radiator Test Stand Glasgow
Reference beam

• CARY 300 spectrophotometer
• sensitivity of 0.001 Abs between 200nm and 800nm
  in 1nm steps
• systematic studies using materials to be tested
  show accuracy of lt 0.2

Sample beam
Fused Silica with/without Glue
Matsushita Aerogel n1.03
6
Timelines milestones
Barrel DIRC
7
Forward Cerenkov
Forward Cerenkov detektor
8

• Radiator quality measurements are in good
  progress (GSI)
• Photon detection measurements towards a small
  photon detector with APD-array is running (SMI)
• Improvements of TOF-measurements are studied (Uni
  Mainz)
• Design studies of Endcap-RICH point towards DIRC
  principle. (Glasgow/Edinburgh)
• Radiator and photon detector test stands fully
  operational by end of the year (Glasgow)
• Deliveries (TDR) expected to be made on schedule