AGS Ramp Polarization Measurement Recipe

Haixin Huang huanghai@bnl.gov

April 28, 2014

 

Description:

 

 This recipe describes how to take the polarization ramp measurement on the Westinghouse cycle.

 

Process:

 

1. Open a xterm. type
ssh cnipol3 -l mcr
cd ado
cp new_set.ini.ramp new_set.ini (and confirm overwrite by answering y when prompted)

2. change the insertion and extraction of target timing on pet/AGS/Polarized_protons/CNI_target. Near the bottom, change the insertion "Delay from source" from 500000 to 3600000 (note how many zeroes!); change the extraction "Delay from source: from 2820000 to 980000.
3. take a target scan to find target center. Use value 103000 as Center Position on the target scan page for target1. Note: the peak position could be very different from flattop target center.
4 Change Num Events to 80 millions.
5.take ramp measurement. Do target scan after two measurements.
6. after the needed measurements done, reverse steps 1 and 2. namely:
change the insertion and extraction of target timing on pet/AGS/Polarized_protons/CNI_target. Near the bottom, change the insertion "Delay from source" from 3600000 to 500000; change the extraction "Delay from source: from 980000 to 2820000.
7. Open a xterm. type
ssh cnipol3 -l mcr
cd ado
cp new_set.ini.flattop new_set.ini

8. change Num Events to 40 millions