Procedure for Optics Runs

Optics runs should be taken during commissioning and repeated every few days.

In production kinematics, insert the multi-foil 12C target and take data under following conditions. Use maximum currents allowed by the target and the VDC with raster on and off. Take about 250 k T1 events for each setting. Make sure that VDCs are on and you are in regular HRS DAQ mode.
  1. Sieve out, raster off
  2. Sieve out, raster on (use the same size as for production)
  3. Take mostly T1 events, prescale away all other triggers.
Note: maximum current allowed for multi-carbon is 120uA, regardless of the raster. This should be the same as maximum current allowed for LD2 target production.  Of course you don't want to kill the VDCs.

Repeat these steps for single 12C target, with raster ON and OFF.