Current short term run plan
From Hall A Wiki
November 7th 2008 5.9 GeV 5 pass beam
MCC is performing ion chamber calibration. Was done using BeO and will finish with the Reference cell.
Plan is :
- Kalyan coincidence trigger test
- Check beam properties beam profile with HARP with <math>\sigma_{x}</math> and <math>\sigma_{y}</math> around 150 <math>\mu m</math> and beam position
For the solid targets and reference cell
BPM A (1.0,4.0) BPM B (-1.0,4.0)
- Ask for raster on, request (4.5x4 mm to MCC this should get 3x3 mm on target. Check with spot
- Go to reference cell with N2 135 psig for ion chamber set point, this should be the densest target which will be used
- Go back to BeO, go to 5 uA with raster off
- Bull's eye scan ( Vince )
- Helium 3 running
Move to empty target
Go to tune beam 1uA BPM A (1.0,4.0) BPM B (-1.0,4.0)
- Helium 3 centering check
Go to 2uA CW Change raster size and check the trigger rates, record scaler rates on HALOG
- raster 2x2mm
- raster 3x3mm
- raster 4x4mm
- raster 5x5mm
if rate on 5x5mm = rate at 4x4 mm, we can go to production
- page Xin to turn on BB HV at 584 5648
- Check target is polarized
- Check rate to find optimum running current
- Stay at this current in twoarmFB and take production data
- Few run with RICH could be requested
Subsytems checks
- HRS
--A1 --RICH --S1 --S2m --Gas Cerenkov --pion rejector
- BigBite
-MWDC -shower -Gas Cerenkov
- Target
-polarization -spin flip -EPR -NMR -COMET laser -EPICS