nmr_probes
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nmr_probes [2019/10/17 10:32] pereira [Manually setting Dipole Fields] |
nmr_probes [2019/10/21 15:43] pereira [NMR GUI does not communicate with NMR controllers] |
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| ===== Troubleshooting ===== | ===== Troubleshooting ===== | ||
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| + | ==== NMR GUI does not start ==== | ||
| The NMR program is connected to the following devices and systems: | The NMR program is connected to the following devices and systems: | ||
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| + | ==== NMR GUI does not communicate with NMR controllers ==== | ||
| + | * This can be seen, for instance, when the NMR controller finds a resonance, but the NMR GUI keeps trying forever. | ||
| + | * Most likely, you need to reboot the terminal server located in S3 | ||
| + | * Go to the mezzanine level, where the NMR controllers are located | ||
| + | * The terminal server is behind the NMR controllers | ||
| + | * Simply turn it off, wait few seconds, and turn it back on | ||
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| + | ==== Spectrograph NMR GUI " | ||
| + | * This is typically the case when the thresholds in the NMR GUI are not set properly. If they are too low, the program may lock in noise. Conversely, if the thresholds are too high, it may miss a weak resonance. | ||
| + | * Threshold for the Spectrograph resonance can be adjusted by hand in the Spectrograph NMR GUI. In general, a threshold 0.15 mV is good for normal NMR signals, whereas 0.10 mV may be necessary if the signal are too weak. | ||
| ==== Manually setting Dipole Fields | ==== Manually setting Dipole Fields | ||
| (Based on notes from Mathias Steiner with some extra info included) | (Based on notes from Mathias Steiner with some extra info included) | ||
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| + | You will need to get access to the NMR controllers in the mezzanine level of S3 (see picture below). You will also have to connect an oscilloscope to one of the NMR controllers, | ||
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| Let’s assume that you want to set the dipole I265DS (first dipole (D1) of S800 Spectrograph) to the rigidity (Brho) 3.7965 Tm (this works for any dipole in the S800) | Let’s assume that you want to set the dipole I265DS (first dipole (D1) of S800 Spectrograph) to the rigidity (Brho) 3.7965 Tm (this works for any dipole in the S800) | ||
nmr_probes.txt · Last modified: 2024/01/29 10:51 by swartzj
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