IntegrationDaq 210212

From Moller Wiki
Jump to: navigation, search

Back to Main Page >> Data Acquisition Meetings >> Integrating mode DAQ meetings

previous meeting << >> following meeting

Meeting information

 Meeting time:  3:30pm Eastern
 BlueJeans calling instructions:
 Toll-Free Number (U.S.&  Canada):  888-240-2560
 Other BlueJeans access phone numbers are listed at
 Bluejeans CODE:                    641 252 323
 Bluejeans link:


  • Activity updates
    • Stripline BPM signal levels (slide): Maybe best choice is an adaptation module to convert from single-ended to differential signal and match voltage accepted by ADC?
  • Discussion of preliminary design review, tentatively planned for a half-day in mid March. We intend this to cover the integrating DAQ, counting DAQ, and the new BCM electronics. Integrating DAQ topics may include:
    • Overall scheme of integrating DAQ
    • Some details about the integrating ADCs?
    • Interfaces to other subsystems
    • Grounding scheme?
    • Other topics?
  • General discussion


Participants: R. Michaels, B. Moffit, M. Gericke, W. Gu, J. Pan, B. Blaikie, D. Bishop, C. Cuevas, B. Shaw

  • Stripline BPM signal levels
    • Daryl reports that it would be possible to design a modified integrating ADC module that would take single-ended inputs instead of differential inputs. This would require some changes in the front end filter, but he expects the overall changes are modest.
    • With the single ended input, the full scale range would be about +/-4V. Then to get the 5V range we need for the striplines we could use attenuators on the input.
    • What is the output impedance of the stripline sample and hold modules?
    • Another idea would be the the front panel (and input filter) could be made as a separate board that would then connect to the main board.
    • Bob, Michael, and I should have a follow up discussion about these options
  • Presentation of summary table in Integrating Electronics document
    • Daryl cautions that in order to achive the 1 MHz bandwidth with a 1 MOhm transimpedance, we'll need to be very careful with the design of the amplifier.
    • We may want to use RG59 for the cable between pmt and amplifier, as it has lower capacitance than RG58
  • Design review discussion
    • We should detail all types of inputs that we might want to put into the integrating ADCS. What types of I/O are people expecting to have with the ADC?
      • Bryan suggests having an external clock input, trigger input, and sync input
      • Bob suggests having some diagnostic output