1. Shashlyk DAQ and FEE Status and Plans Pavel Semenov IHEP, Protvino on behalf of the IHEP PANDA group PANDA DAQ and FEE Workshop, Rauischholzhausen Castle 14-16 April 2010

2. Pavel Semenov, PANDA DAQ FEE Workshop, Rauischholtzhausen Castle 2 Outline FSC photodetectors and electronics FSC PMT HV control and light monitoring system FSC FEE plans

3. 14-16 April 2010Pavel Semenov, PANDA DAQ FEE Workshop, Rauischholtzhausen Castle 3 Shashlyk supermodule structure A hole for the monitoring system LED

4. 14-16 April 2010Pavel Semenov, PANDA DAQ FEE Workshop, Rauischholtzhausen Castle 4 Shashlyk cell light collection and readout 380 layers of 0.3-mm lead and 1.5-mm scintillator, total length 680 mm Transverse size 55x55 mm 2 Light collection: 36 fibers BCF-91A (  1.0 mm) PMT as a photodetector, HV multiplier (Cockroft-Walton) LED for each supermodule as a light monitoring system

5. 14-16 April 2010Pavel Semenov, PANDA DAQ FEE Workshop, Rauischholtzhausen Castle 5 CW control and monitoring unit development CW multipliers for Hamamtsu R5800 and R7899 were tested during prototype studies. Multiplier require only few wires (SPI lines, +/- 6V and 100V power). An amplifier or a shaper can be easily added. CW control unit (up to 64 channels) was developed for the shashlyk prototype testbeam (based on microcontroller to program each channel HV by SPI protocol, monitoring of voltages and currents by on-chip ADC, remote control… ) LED driver to inject light into each of the 16 supermodules showed good long term stability during test beam run Combination of the two systems into one block provides a smart node to test photodetectors and shashlyk part of the DAQ.

6. 14-16 April 2010Pavel Semenov, PANDA DAQ FEE Workshop, Rauischholtzhausen Castle 6 Photodetector selection The goal was to test several PMT’s types (noise, dyn.range, rate effect, signal width, quantum eff.) Now we are in the process of testing samples from Hamamatsu and ElectronTubes (Photonis “temporarily” doesn’t produce PMTs) R1925 looks attractive (like R7899 but more compact, only 43 mm and green enhanced) ETL 9085B – compact, good stability, but expensive

7. 14-16 April 2010Pavel Semenov, PANDA DAQ FEE Workshop, Rauischholtzhausen Castle 7 Cosmic muon test stand measurements To study PMT spectrum and WLS fiber spectrum match with cosmic muons Horizontal and vertical position of the Shashlyk module (MIP ~1:10) ETL9085 23.1 R7899 34.5 R1925 25.0 Cosmic muons spectrum (horizontal position of the Shashlyk module)

8. 14-16 April 2010Pavel Semenov, PANDA DAQ FEE Workshop, Rauischholtzhausen Castle 8 Summary and plans Photodetector selection with cosmic muons test stand is under way, Hamamatsu R7899 is a most probable candidate. PMT HV bases Cocroft-Wolton type were used for testbeam measurements. Plans to study prototype with sampling ADC readout during December 2010 testbeam run. Shashlyk detector HV can be controlled by 6 units of Cockroft-Wolton control and LED monitoring system FPGA algorithms (evaluation or prototype board?) for ADC feature extraction and higher level analysis (em. shower reconstruction)

9. 14-16 April 2010Pavel Semenov, PANDA DAQ FEE Workshop, Rauischholtzhausen Castle 9 Backup slides

10. 14-16 April 2010Pavel Semenov, PANDA DAQ FEE Workshop, Rauischholtzhausen Castle 10 Time between energy depositions (one cell) Near pipeDetector vertical edge

11. 14-16 April 2010Pavel Semenov, PANDA DAQ FEE Workshop, Rauischholtzhausen Castle 11 Prototype testbeam setup

12. 14-16 April 2010Pavel Semenov, PANDA DAQ FEE Workshop, Rauischholtzhausen Castle 12 3 meter gamma-gamma mass spectrum Neutral pions energy range 3-10 GeV FWHM 40 MeV