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Status of Pixel DAQ

Status of Pixel DAQ. Inject/Kill mask issue. With PTA system the problem is not seen. With Slink system the problem is replicated at FNAL. Computer crashing issue. After taking data for a while the computer crashes, curiously it is not the process that crashes.

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Status of Pixel DAQ

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  1. Status of Pixel DAQ • Inject/Kill mask issue. • With PTA system the problem is not seen. • With Slink system the problem is replicated at FNAL. • Computer crashing issue. • After taking data for a while the computer crashes, curiously it is not the process that crashes. • Possibilities: memory leak? Slink does bad things to PCI bus? … • While diagnosing the crashing issue I did noise/threshold calibration. • More work with single chip module. • Currently the data are read out at the end of operation. They need to be read out with a separate process. • Online histogram monitoring. Jianchun Wang

  2. Inject Mask with PTA System One extra shift !? Set 1 in the first cell, (21,0). All 2816 cells in one train. Set 8 cells at a time Read after setting 1111 1111 Read after setting 0000 0000 Jianchun Wang

  3. Inject Mask Comparison Between Two Systems With SLink setup With PTA setup 00101 10010 001 01111110 01010 10010 001 01111110 All timing look the same. With PTA setup the mask is correct according to Dave, with Slink setup it is not. Jianchun Wang

  4. Test Pulse Pulse (mV) TBCOClk – TPulse (ns) Test Pulse (DAC) Phase (DAC) Base (2018.5 mV) - V@+4ns Jianchun Wang

  5. Noise/Threshold Calibration 0 1 2 3 4 5 Probability Probability Injected Charge (60e) Injected Charge (60e) • Threshold ~ 200 e / DAC (?). • Testpulse charge ~ 60.3 e/DAC. • Edge width ~ 66 - 90 e (  noise  testpulse spread  threshold fluctuation). • Existing problems: th6 & th7 cause instability, inject/kill mask issue, computer crashing. col 1 row 2 Jianchun Wang

  6. Problem with Inject Mask Read out after FFR Read out after set 0 to all cells ShiftCtrl Set 0 in inject mask 0xD9 00 55 52 (for 22x16 times) ShiftIn 0 1 0 1 0 1 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 BCOClk ShiftOut Jianchun Wang

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