RICH Data Board Main Features: Differential Signal ADC Bias voltage and current control Parameter monitor (T, I, V) Coherent noise subtraction, and data sparsification What we concern: Precision of charge measurement Short term fluctuation (noise performance) Long term stability
Jianchun (JC) Wang, 08/21/99 Performance of a Chain
Jianchun (JC) Wang, 08/21/99 Status of RICH Data Board 120 + boards are ready Noise performace meet goal (Incoherent noise < 3 ADC counts) High temperature oscillation of power supply solved Analog board and digital board are mounted together
RICH DAQ Version 9902 used for cylinder test before the insertion –Crate information not in event tag –Beamtest data format and event tag Version 9904 will be used for coming test –Gcal used, so wirepulse calibration is possible –Final event tag & close to final data format event tag –DB problem existing ( with more than two crates) Final version 99xx –DB bug fixed –Finish date is uncertain
Jianchun (JC) Wang, 08/21/99 RICH Monitor Data board parameters (Bayar) –Power voltage, bias current and voltage, temperature –Code ready to get information, need graphic display and alarm Raw data quality (Jian) –Number of hits, number of channel used in CM noise calculation, coherent noise, pulser height, etc –Code ready to get partial informations, more need to be done Pass1 data quality (JC, or Tomasz) –Number of hits, pulse height, number of pads per track, number of cluster per track, Cherenkov angle distribution, etc –Not start yet HV (Peter Thies) Gas (Alex & Stephan) –TEA temperature, flow rate, N2 transparency, etc –Running
Jianchun (JC) Wang, 08/21/99 RICH Calibration Existing modes: –Normal mode (pedestal, noise) –Flash, Flash with hold –Single channel mode –Wirepulse mode Parameters store in data base: –Pedestal, noise, dead channel, gain parameters –Unify the online and offline data base ?
Jianchun (JC) Wang, 08/21/99 Summary Hardware: –Chip carrier, CPU, and most electronic cards are ready, some need further work –Cabling nearly finish, test of part and whole cylinder will come soon Software: –Need a lot of work