Record of Parity Settings
From PREX Wiki
Revision as of 15:46, 2 September 2019 by Caryn Palatchi (Talk | contribs)
- Prior to July 10, solenoid angle was incorrect by 3 degrees https://logbooks.jlab.org/entry/3702542
- July 10 evening - after Run 3143 - solenoid angle fixed by injector group (was 89deg, put at 91.2deg)
- July 11 morning- after Run 3175- Table changed to also have solenoid =91.2 (for VWein 88deg) in addition to having solenoid =86deg (for VWein -89deg)
- changed the AposU and AposV voltages july18th,attached picture is a history of what we had until this day in Figure 5
- July24 start of swing: Spin dance performed and HWien angle setting changed from -15.5deg to -13deg.
- July 31 documenting the settings before attempted 10nm move : up through slug23.
| Variable | IHWPout | IHWPout | IHWPin | IHWPin |
|---|---|---|---|---|
| Flip State | FLIP-RIGHT | FLIP-LEFT | FLIP-RIGHT | FLIP-LEFT |
| RHWP | 1 | 1 | 1 | 1 |
| VWien Angle | +88° | -89.9° | +88° | -89.9° |
| Solenoid Angle | 91.19° | 86.901° | 91.19° | 86.901° |
| HWien Angle | -13° | -13° | -13° | -13° |
| PC ON/OFF | ON | ON | ON | ON |
| V PITA | 303 ± 1000 counts | 303 ± 1000 counts | -970 ± 1000 counts | -970 ± 1000 counts |
| V L/4 | 12670 | 12670 | 12670 | 12670 |
| V aposU | 1447 | 1447 | 768 | 768 |
| V aposV | 163 | 163 | -385 | -385 |
| V dposV | 0 | 0 | 0 | 0 |
| V dposU | 0 | 0 | 0 | 0 |
| HallA IA | 42570 | 42570 | 26046 | 26046 |
| HallB IA | 37286 | 37286 | 29353 | 29353 |
| HallC IA | 23000 ± 2000 counts | 23000 ± 2000 counts | 38000 ± 2000 counts | 38000 ± 2000 counts |
- Aug 1, slug 24 and 25. After 1 run in slug 24, changed AposV to try to cancel position differences. https://logbooks.jlab.org/entry/3713312. IHWPin: AposV=-385 --> want delta -20nm = +400counts --> new AposV =15. IHWPout: AposV=163 --> want delta +20nm = -400counts --> new AposV =-237
- For slugs 26 -65 used above nominal AposU/V settings: IHWPin: AposU/V=768/-385,AposU/V=1147/163
- Aug 25, starting with slug66-slug71, implemented the following change:
- IHWPin: AposU/V=768/-385 ---> new AposU/V=685/-678 (change AposU by -83 counts, change AposV by -293counts)
- IHWPout: AposU/V=1147/163 ---> new AposU/V=1176/465 (change AposU by +29 counts, change AposV by +302counts)
- Aug27, starting with slug 72, implemented:
- IHWPin: AposU/V=685/-678
- IHWPout: AposU/V=1176/465---> new AposU/V=1205/767 (change AposU by +29 counts, change AposV by +302counts)
- Aug29, starting with slug 74, implemented:
- IHWPin: AposU/V=685/-678 ---> AposU/V=768/-385 (change AposU by +83 counts, change AposV by +293counts)
- IHWPout: AposU/V=1205/767
- attempt to change slug 78 failed
- Sep2, starting with slug 79, implemented:
- IHWPin: AposU/V=768/-385 ---> AposU/V= 528/-1264 (change AposU by -3*83 counts, change AposV by -3*293counts)
- IHWPout: AposU/V=1205/767 ---> AposU/V=1292/1673 (change AposU by +2*29 counts, change AposV by +2*302counts)
