A few points that need discussion today (Gerard) UH needs golden front boards (2?), golden HVB (1), and HV cabling to PS with the correct connectors. IU needs at least 4 carrier rev E (perhaps D is ok?) boards assembled with termination on all anodes, at minimum. 4 carrier rev E assembled with all amp and calibration circuit components, and power supplies as necessary, would be best. These items are needed for production test. Ideally, we don’t vary the production test procedure ever. So, there is a bit of chicken- and-egg problem in this. Anyway the schedule when we can cross-ship these items needs to be discussed. I cannot yet say precisely when I can ship production HVB or front boards. Realistically it may be necessary to use the pre-production HVB & front boards at least at first.

HV cables beyond the end of the pigtail are still undefined/off-budget. ??? Anyway I believe in general terms we need: RG-316 from pigtail patch (free cable connection) to patch panels mounted nearby outside the magnet. This cable has LEMO at inner end and probably SHV at outer end? Patch panel consists of SHV bulkhead barrels. RG-59 from patch panel at magnet to patch panel at e-hut rack. This cable has SHV on each end. Note the magnet patch panel end could be SHV receptacle bulkhead mount, that would be cheaper but then those cables get captive. Which to do? Short cable in rack to transition from patch panel to power supply special connector (Redel??). This cable could be captive to the patch panel there, no problem. All cables have to be tested, hipot to 5kV at least. Best to have a vendor build and test, save our labor for more specialized tasks. This at least is the plan for HVB pigtails. The HVB pigtails must be ordered soon to meet production schedule. Need to understand the plan for the first item above, before ordering pigtails. The first item above must be installed at/before module installation. Preferably all the external cables, and HVPS, AC feed, and rudimentary control software too in order to test at module installation. (Otherwise, a temporary HVPS setup would do.) Small reminder – we should have ground isolation everywhere except in rack. Some sleeving needed over connector shells, and magnet-mounted patch panel needs nonconductive panel. HVB pigtail cable length(s) must be defined soon (by Sept. 30 th )! [BTW: Should lengths be staggered so that connectors don’t bunch up in the cable path?]

Brief discussion on status of HVB test setup At IU, starting to think how to make the “clamshell” fixture to contact raw assembled HVB (which has no cables or pogo pins). Tech is helping to flesh this out. James’ HV load/mux/measure box design is coming along... Latest status? I think I still owe info on a connector to get the 40 HV lines into it. Prospects for test software – status/discussion? Raspberry pi installed, on local network, sucessfully talks to ISEG HVPS and Keithley 2010 DMM Test algo for HVB needs to be detailed by Gerard Commonality of all this stuff with carrier board test setup (test input pulser control)...

HVB mechanical questions Use helicoils or not? Probably “yes”… Is there a design concept (or better even a full drawing) of HVB-to-front in situ alignment tool? Status on bracket: This has certainly fallen behind, I am working to finalize it this week. Will try to get first parts fabricated at IU physics shop. Production quantity I think we still have to figure out. All production parts (even the first ones) should be plated, or else they shouldn’t really be used as production parts.