RGM RC Meeting Feb2 Feb9

Tuesday, Feb 1, SWING

* running on LAr until 8pm 

* 6 GeV 25 nA on LAr 0.56 M events, runs 15289 - 15802

* empty LAr target 
* 1 hour empty target run, 150nA, beam blocker IN
* beam blocker calibration 

* insert single foil Sn (200 mg/cm2) target
* beam blocker calibration for 6 GeV on single foil Sn target 
** noticed that target cannot be in beam
* beam line expert (Eugene) to the rescue: positions target per expert mode

* from Run #15805 on: beam blocker calibration from 4 GeV run on Sn(x4) target is uploaded <--
* start running on repositioned target Sn with 90 nA, beam blocker IN
** tdcpcal3 histograms empty goes unnoticed

Wednesday, Feb 2, OWL

* continue running on Sn target with 90 nA, beam blocker IN
** some detector/DAQ issues, some beam issues 
** tdcpcal3 histograms empty goes unnoticed
** BST has noisy strips with SN target and in beam 
*** expert: most prominent with tin target and this might be due to electrical conductivity of the foil

Wednesday Feb 2, DAY

* warming up LAr target to room temp while running
* continue running on Sn target with 90 nA, beam blocker IN
** tdcpcal3 issuefixed
** more issues: HV drop pcal and ftof in sector 3, ok after turning HVs back on

* BST noisy strips: access hall to make a test with target motor off, no change

* performed beam blocker calibration with Sn target
* continue running on Sn target with 90 nA, beam blocker IN

Wednesday, Feb 2, SWING

* continue running on Sn target with 90 nA, beam blocker IN
* from Run#15819 on, beam blocker calibration from 6 GeV run on single foil Sn target is uploaded <--
* few issues with beam down, sector 3, RICH

Thursday, Feb 3, OWL

* continue running on Sn target with 90 nA, beam blocker IN
* few issues with beam down, DC and BMT HV trips, FTOF minor HV alarms
* 07:30 beam off for target change

* 6 GeV 90 nA on single foil Sn 0.37B events, runs 15806 - 15827

* investigating occurrence of disabled sector trigger alarm

* short term: establish beam running conditions (when beamline vaccum is good)
** scan on harp 2H01A harp, luminosity scan, 
** luminosity scan, go for ~100nA beam current, check DC region occupancies, HV currents
** do beam blocker calibration 6 GeV on Ca48 (later today?)
** low luminosity run (later)

* first and foremost: start running on 6GeV ~100nA on Ca48 target, beam blocker IN
** run until SAD