AGS B-field Scan Procedure ( Polarization vs. B-field)

12/15/2010

The polarization at extraction is a function of beam energy, which in turn is function of extraction B-field, radius and rf frequency. To get this function, for each set of B-field, following parameter should be measured:

1. B-field from the AGS main magnet function. Usually, the scan is done with step size of 20 Gauss with range of +- 100 Gauss.
2. Do emittance measurement to determine the beam center) before each polarization measruement. Dump both target measurement and emittance measurement page to elog.
3. Enter B field in the Krisch sheet (in the column of spare1).

Haixin