Target Field and Kepco Info
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Revision as of 08:23, 10 June 2020 by Wmhenry (talk | contribs) (→Plan for returning from COVID shutdown)
This page is dedicated to all things Target Field related
Log Entries
- Nov. 26th Kepcos replaced Agilents https://logbooks.jlab.org/entry/3744320
- Dec. 26th V_in vs Current Calibration for two Kepcos in voltage control mode https://logbooks.jlab.org/entry/3747508
- Jan. 4th Swapped out Kepco with another Kepco because it was not stable https://logbooks.jlab.org/entry/3758511
- Jan. 15th Swapped out Kepco with another Kepco because it was running hot and tripping https://logbooks.jlab.org/entry/3764365
- Feb. 9th Field sweep program updated for Agilent https://logbooks.jlab.org/entry/3780264
- Feb. 10th Replaced Kepco with Agilent. Rearranged rack for better cooling https://logbooks.jlab.org/entry/3781492
- Feb. 14th Replaced Agilent with new Kepco. In constant current mode the inductive load option interfered with NMR https://logbooks.jlab.org/entry/3783977
- March 18th In constant voltage mode, coils need time to warm up https://logbooks.jlab.org/entry/3805990
- March 22nd New Kepco had odd behavior in voltage mode. Transverse NMR was not working. Left in current mode. https://logbooks.jlab.org/entry/3807357
- March 22nd Odd behavior explained from above. Noticed possible grounding issues. https://logbooks.jlab.org/entry/3807894
- March 24th Trouble getting transverse NMR signal. Bad Cable? https://logbooks.jlab.org/entry/3809148
Coil Currents for D2n
SHMS 11 degrees
| Field Direction | Helm. Lg. | Helm. Sm. | Vert. Lg. | Vert. Sm. |
|---|---|---|---|---|
| 0 | 0.0 | 7.280 | ||
| 90 | 7.406 | -0.25 | ||
| 180 | -7.350 | 0 | ||
| 270 | -7.364 | -0.237 |
SHMS 11 degrees
| Field Direction | Helm. Lg. | Helm. Sm. | Vert. Lg. | Vert. Sm. |
|---|---|---|---|---|
| 0 | ||||
| 90 | ||||
| 180 | ||||
| 270 |
Labview Program Guide
Field Measurements
- A1n Vertical Field Measurement (March 13th, 2019)
https://logbooks.jlab.org/entry/3804362
Plan for returning from COVID shutdown
- Work that can begin immediately (June 10th, 2020) Task 1 in HCLIST (http://devweb.acc.jlab.org/CSUEApps/hclist/atlis.php?load=Task&task_id=1818)
- Follow manufacturers "Check out" procedure for new power supply which was delivered during shutdown
- This can be done anywhere, I just need some connectors from Ethan or Jack. Currently the new power supply is in Bill's office.
- Measure resistance to ground for both coils.
- Install latest new power supply, add additional circuitry (RLC).
- Test power supplies in both current and voltage control mode
- MUST check PS output on scope, with and without RF on.
- LIKE to check PS output on scope, with and without sense wires attached.
- LIKE to check PS output on scope, with and without additional circuity (RLC).
- LABVIEW
- Determine calibrations: Current to field, field direction equation for epics, function generator output vs PS output, ...
- Update programs. One for voltage mode, one for current mode
- Follow manufacturers "Check out" procedure for new power supply which was delivered during shutdown
- After the cell is polarized (Task 9 in HCLIST)
- Test NMR in both voltage and current mode
