Difference between revisions of "Measurements"
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After doing an NMR sweep, record the date, time, and polarization percentage. Link to a log entry in which you include a screenshot of the NMR Field Sweep Control Program. | After doing an NMR sweep, record the date, time, and polarization percentage. Link to a log entry in which you include a screenshot of the NMR Field Sweep Control Program. | ||
* date, time, polarization% : link to log entry | * date, time, polarization% : link to log entry | ||
| + | * 11/11/2022 00:58 27.6% : [https://logbooks.jlab.org/entry/4080494] | ||
| + | * 11/11/2022 04:18 33.0% : [https://logbooks.jlab.org/entry/4080593] | ||
| + | * 11/11/2022 06:18 34.4% : [https://logbooks.jlab.org/entry/4080670] | ||
| + | * 11/11/2022 08:48 35.3% : [https://logbooks.jlab.org/entry/4080756] | ||
| + | * 11/11/2022 12:38 37.8% : [https://logbooks.jlab.org/entry/4080941] | ||
* 11/11/2022 15:53 41.4% : [https://logbooks.jlab.org/entry/4081069] | * 11/11/2022 15:53 41.4% : [https://logbooks.jlab.org/entry/4081069] | ||
Revision as of 17:17, 11 November 2022
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Contents
Target Polarization Angle Conventions
Be VERY clear here about the convention (beam-right/left/up/downstream) vs 0, 90, 180, 270) for each run period. More notes and references to log entries are better.
Taking an NMR Measurement
- Make sure that the holding field settings are correct for whatever magnetic field settings you're working with.
- Note that if you have to change the holding field, you will then need to restart the NMR GUI once the holding field is in its new configuration.
- This can be done by pressing the red "stop" button in the top left hand corner and then the "run" button.
- Call MCC to mask the beam so that you can move the target to the "pickup coils" position.
- Make sure that the NMR GUI settings are correct. The high field should be 34G and all of the sensitivities should be 100.
- In the white box on the bottom left hand side of the NMR GUI you can write a comment with convection and B field settings.
- Press the green "Start" button.
Polarization Calibration Data
ADD LIST OF CALIBRATION RUNS HERE AND A TABLE OF RELEVANT CALIBRATION CONSTANTS TO USE FOR WHAT RUNS
| Cell | Calibration Type |
SHMS Angle /degree |
SHMS Momentum /GeV |
Field Direction /degree |
Calibration Results | Status | Oven Temperature /°C |
Log# |
|---|---|---|---|---|---|---|---|---|
| Hunter | EPR-NMR | 11 | 7.5 | 90 | 5.24 %/mV | Done | 200 | 3839939 |
| Hunter | EPR-NMR | 18 | 5.6 | 90 | undone | 205 | ||
| Hunter | EPR-NMR | 11 | 7.5 | 270 | undone | 208 | ||
| Hunter | AFP Loss | 14.5 | 6.4 | 90 | 1.25%/Sweep | Done | 200 | 3840618, 3840143, 3840618 |
Recent polarization measurements
After doing an NMR sweep, record the date, time, and polarization percentage. Link to a log entry in which you include a screenshot of the NMR Field Sweep Control Program.
