Question from NMRWiki Q&A forum Please suggest experiments that push the power limits of NMR probes

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[Question from NMRWiki Q&A forum] Please suggest experiments that push the power limits of NMR probes

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10-08-2010, 02:35 AM

nmrlearner

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Please suggest experiments that push the power limits of NMR probes

Please suggest experiments that push the power limits of NMR probes

I'm trying to come up with reasonable tests of probe performance for all channels by simulating conditions at which arcing is most likely to occur.

For those tests I usually read voltage of the incoming wave on the RF line using directional coupler with a 50dB attenuated pickup and oscilloscope after running an "experiment" pulsing at the power and duty cycle that simulates the condition to be tested. If the waveform looks nice and square - there is no arcing.

What experiments should I look into? OK for 1H I'd pick TOCSY with the longest mixing time we use.What about 13C, 15N, 31P?

How do you do this kind of testing for solids probes?

How do you test fitness of gradient coils?

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