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nmr_probes [2019/10/17 10:29] pereira [Manually setting Dipole Fields] |
nmr_probes [2019/10/17 10:32] pereira [Manually setting Dipole Fields] |
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* Set EPICS channel **I265DS_MAG.BSET** to 13.5454 (note, the default value of this channel is always an (impossible) 9999.1111, which is ignored. Typing 13.5454 will cause the magnet to go to 257.577 A, and **I265DS_MAG.BSET** goes back to 9999.1111. Setting the magnet this way will get you to plus or minus half a percent of where you want to be. | * Set EPICS channel **I265DS_MAG.BSET** to 13.5454 (note, the default value of this channel is always an (impossible) 9999.1111, which is ignored. Typing 13.5454 will cause the magnet to go to 257.577 A, and **I265DS_MAG.BSET** goes back to 9999.1111. Setting the magnet this way will get you to plus or minus half a percent of where you want to be. | ||
* At that point, the quickest way may be to use the FINE knob in the NMR controller to find the actual field value. Just turn the knob until the resonance is centered in the oscilloscope, | * At that point, the quickest way may be to use the FINE knob in the NMR controller to find the actual field value. Just turn the knob until the resonance is centered in the oscilloscope, | ||
- | * Once you know the value of the field, type it (in Tesla) into the EPICS channel **I265DS_MAG.FELD**. Note that is what Daniel' | + | * Once you know the value of the field, type it (in Tesla) into the EPICS channel **I265DS_MAG.FELD**. Note that this is what Daniel' |
* Having done that, you can use the BARNEY ' | * Having done that, you can use the BARNEY ' | ||
* Repeat until satisfied. | * Repeat until satisfied. |