Agenda

Paul King - DAQ system change: Running the trigger interface interconnect fiber from the ISB to the Hall. DocDB 1041
Discussion of future agenda topics

Deferred:

Minutes

Proposal: run a TI fiber interconnection between Injector Service Building & CHA/Hall A (Paul King)

required by newer versions of CODA software and hardware
This is essential, and it was an oversight to not include this in original budget
About $15k fiber+installation ISB->CH (on NSF), about $10k CH->Hall A (on DOE project)
TB agrees this is required.

Update on Counting Mode hardware: removal of discriminators and VETROC in scintillator readout

This change was already presented (briefly) in the Dec '21 collaboration meeting and the April 7, '22 Detector meeting
The FADC readout, with 4ns time bins, will provide suitable time resolution for coincidence triggers of scintillators.
The 4ns time resolution will be improved by edge finding on the risetime of a signal. The time resolution for tracking is well beyond what is needed for the 25ns APV GEM readout time binning
The FADC clocks will be synched.
There were no objections to this change.
Several side issues were raised:
- It was noted that while the primary trigger required a front and back scintillator, alternative triggers such as those required for hunting backgrounds would also be possible. This includes an open pulsar trigger.
- The long cable (about 200ft) from the scintillator amplifier to the FADC should be fully qualified, testing the readout with cosmics
- some further discussion of cabling issues let to a suggestion of a separate meeting to discuss those in detail

Absent: