RD-2018-02-12

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EIC Tracking R&D Meetings: Mondays 9:00am - 11:00pm

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Link to the previous meeting: https://wiki.bnl.gov/eic/index.php/RD-2018-01-29

Link to all previous meetings: https://wiki.bnl.gov/eic/index.php/Eic-rd-meeting


Kondo (chair); Alexander, Bob, Marcus


Progress at UVa

  • Kondo says not much happening at UVa, partly because the student who is working on the project is taking shifts at JLab; but prototype design is more or less complete
  • Last week Kondo and Marcus discussed the prospects of eRD3 and eRD6 merge; they are planning to have more meetings in a small circle, since the matter affects forward tracking primarily;
  • Marcus says Bernd in general agrees that the merge is necessary, but the groups need to work out the strategy what to do next and then the Tracking Consortium as a whole should take a decision;

Progress at FIT

  • Marcus reports that the first mock assembly of their prototype is done; the chamber is leaking badly and one of the problems is that carbon fiber frame does not have a uniform surface in all places; longer screws may be required to tighten the assembly properly;
  • Marcus mentions Matt's involvement in simulation work; Alexander suggests that both students in principle have all the required input in hands to proceed with the meaningful simulations and it is a matter of priorities to speed things up now or wait until May (June); Marcus and Kondo will discuss this with the students;
  • Marcus also reports that they received FY17 and FY18 funding, and in particular the travel money for attending the summer EIC R&D Committee meeting is available now;

Progress at BNL

  • Bob reports that the group is getting ready for the Fermilab test beam; they are putting together electronics to operate the old Somacis board (chemically etched zigzag pads); the new multi-pattern board from TTM is awaiting delivery; they hope to put together 2-3 different detectors, in particular a 2G+MM hybrid, 4G zigzag prototype and they also have one of the Somacis boards bulked at Saclay, ready for MM operation; the other work items are DAQ, analysis software, adapter board, etc;
  • Bob says next week the primary installation and the ORC at Fermilab are planned; then one week break and two weeks of data taking Mar,5-16; the idea is to perform XY-scans of different patterns in the zigzag parameter space, vary gain (field configuration), try out different gas mixture; in other words perform a comprehensive study with the available detectors; the TTM boards will have <1mil strip-to-strip gaps; the company will provide 8 boards total, but on the best effort basis; the experience with Elvia showed one can expect strip de-lamination, occasional shorts and other production issues; last week first pictures become available and they look promising, but further adjustment of the laser ablation process is needed;
  • Alexander mentions that Saclay colleagues are producing similar boards with Elvia; he also says that half of the TTM boards will be produced in a more "safe" version (with sharp tips cut out);
  • Kondo asks whether the APV electronics will be used; Bob replies that the plan is to use two different types of readout: either 128 channels of old-fashioned PAs with a dynamic range of up to 6*10^6 attached to the high sampling rate DRS4 digitizers (CAEN V1742) or use DREAM electronics (Saclay in-house development); Kondo mentions that they are using custom electronics for TRD prototype readout at JLAB (it is good: 8ns shaping time, large dynamic range; but expensive, around ~$100/channel), but these are Hall D spares and can not be taken outside of JLAB; Bob says they can lend the DRS4 electronics to Kondo for the July test run, but also Klaus was interested in using it; Marcus asks whether TRD can benefit from a higher dynamic range; Kondo: yes!;
  • Marcus asks whether the March test run is going to happen under the FLYSUB umbrella; Alexander replies that assuming the LDRD program will be running for 3 years they decided to split off and submit a separate FTBF TSW; this does not exclude participation in FLYSUB test beam campaigns in the future;

AOB

  • Marcus asks how many channels of APV electronics can be provided for the July test run; it turns out that Kondo has ~100 cards, but FECs developed some issues, perhaps after being used under harsh JLAB beam conditions (rad. damage?); Marcus however has exactly the opposite situation (2 working FECs, but short of the APVs); the problem with firmware incompatibility between different SRS hardware revisions was mentioned; Marcus also mentions that with only 9 APV cards required for the large FIT prototype they may even run without zero suppression;
  • A question again was raised about changing the meeting time in order to better accommodate the Stony Brook colleagues schedule; Kondo will contact Tom and Klaus one more time; the common understanding is that they both are busy with the sPHENIX TPC work and reviews rather than anything else; Bob confirms that Tom is pushing for a smaller TPC prototype (<1m long and perhaps 50cm diameter) to be used in the March test run; otherwise they consider May (to have results for the CD1 review) or July;