1. HERD Prototype Beam Test
Trigger System Design and Preliminary beam test results
HERD Group
Institute of High Energy Physics, CAS

2. HERD prototype Trigger System
Characteristics：
Self-trigger generation and PS-trigger distribution
DAQ for PMT, PSD, reference LED and PS, 13 channels totally
Beam status monitor: real-time histogram, count rate, peak, and FWHM
Synchronization with ICCD/IsCMOS

3. HERD prototype Trigger System
4 Topics:
High dynamic range PMT readout system design and test
Multi channel DAQ system design for PMT, PSD, reference LED and PS
DAQ firmware and monitor software：real-time histogram, count rate, peak, and FWHM
Preliminary beam test result

4. HERD prototype Trigger System
PMT readout hardware architecture：
High dynamic range readout: anode and dynodes
PMT driver and pre-amplifier integration

5. HERD prototype Trigger System
PMT readout hardware：

6. HERD prototype multi channel DAQ System
DAQ box：

7. HERD prototype multi channel DAQ System
DAQ system hardware：

8. HERD prototype multi channel DAQ System
Multi channel DAQ system architecture：
20 channels×80MSPS×12bits
Real-time tuning with pedestal、gain、integration length for each channel

9. Multi channel DAQ firmware
Firmware architecture
Customized USB2.0 MCU interface
Core: Xilinx Virtex-5 /XC5VLX
Multi channel data: parallel waveform and event integration
Real-time control of pedestal, gain, trigger

10. Real-time DAQ and monitor software
Software architecture：
Multi-threads to process DAQ, storage, real-time data statistics and GUI
Real-time calculation of waveform, histogram, counts rate curve, peak position and FWHM for each channel
Real-time control of pedestal、gain、high voltage、trigger policy

11. Preliminary results: muon and pion measurement
50GeV muon histogram /anode readout
150GeV pion histogram /anode readout

12. Preliminary results: 50 GeV electron histogram
Anode readout

13. Preliminary results: Linearity vs. electron beam energy
Anode P , dynode 8, dynode 7 readout

14. Preliminary results: Linearity deviation vs. electron energy

15. Preliminary results: Resolution vs. electron energy
Anode P and dynode 8 readout

16. Preliminary results: 350 GeV proton histogram
DY8 readout

17. Reference LED intensity vs. time in a complete 100 GeV electron run
Preliminary results:
Reference LED intensity vs. time in a complete 100 GeV electron run

18. Preliminary results: 50 GeV muon histogram
INFN-PS-S0 readout

19. Preliminary results: 100 GeV electron histogram
INFN-PS-S0 readout

20. Preliminary results: 350 GeV proton histogram
INFN-PS-S0 readout

21. Summary Preliminary beam test results： Work in the future：
Trigger generation and distribution
DAQ for PMT, PSD, reference LED and PS system
Beam status monitoring
Synchronization with ICCD/IsCMOS
Work in the future：
Merge PMT data with ICCD/IsCMOS data
Process the PSD data
Prepare for the beam test at the end of Oct.

22. Thank you！ Tianwei Bao baotw@ihep.ac.cn
Institute of High Energy Physics, CAS