Difference between revisions of "SBS BPM calibration"
From Hall A Wiki
(→Analyzing the Data) |
(→Taking a BPM Pedestal Run) |
||
| (2 intermediate revisions by the same user not shown) | |||
| Line 9: | Line 9: | ||
'''Unrastered beam is required for this procedure''' | '''Unrastered beam is required for this procedure''' | ||
| − | # Start a new CODA run with the description ''[BPM Calibration | + | # Start a new CODA run with the description ''[BPM Calibration: Bull's Eye Scan]'' |
# Ask MCC to steer the beam to the nominal center of the target | # Ask MCC to steer the beam to the nominal center of the target | ||
# When the beam is stable, ask MCC to perform a HARP scan using the two SuperHARPs near the target, 1H04A and 1H04B. Request MCC to make an elog entry with the HARP scan results. All three HARP wires should be visible. | # When the beam is stable, ask MCC to perform a HARP scan using the two SuperHARPs near the target, 1H04A and 1H04B. Request MCC to make an elog entry with the HARP scan results. All three HARP wires should be visible. | ||
| Line 18: | Line 18: | ||
= Taking a BPM Pedestal Run = | = Taking a BPM Pedestal Run = | ||
| − | # Ask MCC to set iocse10 to Forced | + | # Ask MCC to set '''iocse10''' to '''Forced Gain = 0'''. |
| − | # Take a CODA run and label as ''BPM Pedestal Run'' | + | # Take a CODA run and label as ''[BPM Pedestal Run]'' |
# Use only clock triggers (<span style="color:red"> set presale for TX=XYZ </span>) | # Use only clock triggers (<span style="color:red"> set presale for TX=XYZ </span>) | ||
| − | # | + | # Take data for about 100k events. |
| − | # Ask MCC to set iocse10 to auto gain. | + | # Ask MCC to set '''iocse10''' to auto gain. |
= Analyzing the Data = | = Analyzing the Data = | ||
<span style="color:red">Directions coming soon</span> | <span style="color:red">Directions coming soon</span> | ||
Latest revision as of 16:00, 14 June 2021
Contents
Description
This section gives instructions to perform a Beam Position Monitor (BPM) calibration.
Performing a Bull's Eye Scan
Unrastered beam is required for this procedure
- Start a new CODA run with the description [BPM Calibration: Bull's Eye Scan]
- Ask MCC to steer the beam to the nominal center of the target
- When the beam is stable, ask MCC to perform a HARP scan using the two SuperHARPs near the target, 1H04A and 1H04B. Request MCC to make an elog entry with the HARP scan results. All three HARP wires should be visible.
- Record the elog entry numbers for all HARP scans.
- Ask MCC to steer the beam to positions around the nominal center:
- (0,0), (2,2), (2,-2), (-2,-2), (2,-2), (3,3), (-3,-3), and repeat (0,0). Repeat HARP and CODA runs for each of these positions. Label and document the runs accordingly in a HALOG post (example).
Taking a BPM Pedestal Run
- Ask MCC to set iocse10 to Forced Gain = 0.
- Take a CODA run and label as [BPM Pedestal Run]
- Use only clock triggers ( set presale for TX=XYZ )
- Take data for about 100k events.
- Ask MCC to set iocse10 to auto gain.
Analyzing the Data
Directions coming soon
