<html><body><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000"><div>Minutes of Hall A Group Meeting: August 29, 2017<br><br>1. Thia Keppel<br> a. Senior Staff<br> i. NPES schedule should be approved & on the web & available to users all in ~ a week<br> ii. 6 GeV DVCS (gluon) accepted by Nature Communications<br> iii. Tritium training to be available online around 10-1-17. <strong>Need to have this for shifts!</strong><br> iv. Shipping for overseas, please work with Janet Prater<br> 1. Customs can be waived or ~ 2k, depending on how arranged<br> b. Hall business<br> i. Please get travel projections in to Stephanie!<br> <br>2. Robin Wines<br> a .SBS<br> i. Continue on HCal engineering checks<br> ii. ECal & CDet support design<br> iii. Ordered shielded beamline assembly parts<br> iv. Continue on polarized 3He target<br> v. Received budgetary estimates for floor plates<br> b. PREX/CREX<br> i. Work order placed for machine shop to fabricate collimator parts<br> ii. Tungsten due in this week<br> iii. Septum coil finally out for bid<br> c. APEX<br> i. Corrector coil bids due this week<br><br>3. Jessie Butler<br> a. Continue looking over the cryogenic and vacuum systems to look for ways to improve on hea load to ESR<br> b. DVCS crystals surveyed & moved out of hall & in to ESB for storage<br> c. Finished leak checking & repairing leaks in the exit beamline vacuum<br> d. Received & tested the motors to finish rebuilding the final 2 vacuum pumps<br> i. Motors are good – planning on installing the motors by middle of the week<br> e. Prepping for swapping out the LQ1 power supply with the new one<br> f. Moved R-HRS into 12.5 degrees & built guard for RQ1<br> g. Both Q1 guards have been modified to support HRS being at 12.5 degrees<br> h. Continue to support Target Group work in hall<br><br>4. Jack Segal<br> a. Filter replacement in HRS racks<br> b. Replaced all NIM crate cooling fan filters<br> c. SBS GEM electronics<br> i. Request to evaluate mechanical attachment of long backplane on GEM detectors to be used in GMN experiment </div><div> backtracking plane<br> ii. Problem encountered is too much flexing of card reinforcement “rib” that utilizes existing screw hole pattern<br> iii. Material ordered for fabrication of prototype part for evaluation<br> iv. Identified some leakage current affecting the RQ2 quench detection circuit<br><br></div><div data-marker="__SIG_POST__">-- <br></div><div>Stephanie Tysor<br>Hall A Administrative Assistant<br>Thomas Jefferson National Accelerator Facility<br>(office)757-269-6005 (fax)757-269-5235</div></div></body></html>