BPM Calibration

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BPM pedestal run (20 minutes)

1. Ask MCC to set iocse10 to Forced gain = 0.

2. Take CODA run for both Right and Left arms.

• Use only clock triggers. T8=100
• Need about 100k events.

3. Ask MCC to set iocse10 to auto gain.

Pedestal run: Left arm: Run: 757 and 758 ( longer one) Right: Run: 90557 and 90558 (longer one)

BPM Calibrations (Bullseye Scan) [1-2 hours]

This calibration was done in the owl shift of 12/14.2017 using both arms DAQ, however the Right arm dipole wasn't enabled. Set Beam energy (MeV) : 6418.49 Current ~6.7 uA

Bulls eye scan for 12/14/2017

Relative position	LHRS CODA run	RHRS CODA run	Harp scan entry no.	HarpA time stamp	HarpB time stamp
(1.15,2.25)	805	90595	3504092	12142017_01:55:06	12142017_01:58:24
(2.15,3.25)	806	90596	3504121	12142017_02:38:06	12142017_02:39:57
(0.15,3.25)	807	90597	3504130	12142017_02:49:00	12142017_02:52:45
(0.15,1.25)	808	90598	3504140	12142017_02:57:48	12142017_02:59:33
(2.15,1.25)	809	90599	3504146	12142017_03:04:43	12142017_03:08:13
(1.15,2.25)	810	90600	3504151	12142017_03:17:15	12142017_03:19:01

Bulls eye scan for 01/13/2018

Pedestals runs 1160 90721

(0,0) = BPM A (1.5,0.5) BPM B (1.5,1.5)

Relative position	LHRS CODA run	RHRS CODA run	Harp scan entry no.	HarpA time stamp	HarpB time stamp
(0,0)	1132	90708	3512093	01132018_05:43:19	01132018_05:49:10
(0,1)	1133	90709	3512105	01132018_06:05:20	01132018_06:09:03
(-2,1)	1134	90710	3512114	01132018_06:14:09	01132018_06:17:09
(-2,-1)	1135	90711	3512121	01132018_06:27:38	01132018_06:33:47
(0,-1)	1136	90712	3512127	01132018_06:40:32	01132018_06:42:29
(0,0)	1137/1138	90713/90714	3512133	01132018_06:52:50	01132018_06:54:52
(-1,0)	1139	90715	3512139	01132018_07:07:22	01132018_07:10:59

Bulls eye scan for 01/13/2018 Day shift/swing

Relative position	LHRS CODA run	RHRS CODA run	Harp scan entry no.	HarpA time stamp	HarpB time stamp
#1 A(1.6 ,0.5) B(3.3, 0.2)	1163	90727	3512548	01132018_15:51:08	01132018_15:53:29
#2 A(3.1,2.0) B(4.8,1.7)	1165	90729	No log book]	01132018_16:41:46	01132018_16:39:06
#3 A(3.1,-1.0) B(4.8,-1.3)			3504140
#4 A(0.1,-1.0) B(1.8 , -1.3)			3504146
#5 A(0.1,2.0) B(1.8,1.7)			3504121
#6 A(1.6 ,0.5) B(3.3, 0.2)			3504151

Bulls eye scan for 05/02/2018 Day shift/swing

Relative position	LHRS CODA run	RHRS CODA run	Harp scan entry no.	HarpA time stamp	HarpB time stamp
#1 A(1.3,0.75) B(2.9,0.25)
#2 A(0.6,-0.75) B(2.2,-1.25)
#3 A(2.1,-0.75) B(3.7,-1.25)
#4 A(2.1,-0.75) B(3.7,0.75)
#5 A(0.6,1.25) B(2.2,0.75)
#6 A(1.3,0.75) B(2.9,0.25)

How to perform a bulls eye scan:

1. You need unrastered beam:

    - This must be competed in phase 1! 
    - use single foil target.
    - set PS8=100, run both arms

2. Ask MCC to steer the beam to the nominal center of the target.

3. Wait until beam is stable and have MCC perform a harp scan for the two superharps near the target (1H04A and 1H04B) and take a CODA run for both the left and right spectrometers during the same time. Start the coda run first before asking MCC. Request MCC to make an ELOG entry with the Harp results, you should see all three harp wires. Record ELOG entry numbers and timestamps of both harpscans.

4. Ask MCC then to steer the beam to positions around the nominal center:

    - cover at least the area the raster will cover: (2,2), (2,-2), (-2,-2), (-2,2), (3,3), (-3,-3), and repeat (0,0)
    - repeat harp and CODA runs for each position

5. Record Harp scan run numbers and corresponding CODA run number for each beam position. As an example, see HALOG # 3324009.

6. Make a record of the harp scans and CODA runs in the HALOG.

How to analyze the bulls eye scan:

 - detailed instructions can be found at the Analyzing BPMs website.
 - the shift crew is not expected to analyze the bulls eye scan.

Calibration

A Calibration was completed on Dec 14th. The slides showing the results from this calibration cane be seen here