Dear AMMRL Group:
We have lost the manostat on our old Oxford (unshielded) 600 MHz magnet, since
it is too old for the manufacturer Bronkhorst to repair. I am being asked to
justify buying a new one. It seems that the manostat would be a better buffer
interfacing with a helium recovery system than a back pressure regulator, which
does not set an absolute pressure but varies with the atmospheric pressure.
I must also answer the question of whether the manostat is required for successful
spectroscopy. What effects show up in spectra if the manostat is not present for
a 600 MHz or higher magnet? Are these effects not seen in rapidly obtained spectra,
say taken in several minutes to one hour? Are the effects likely to be a problem
when taking longer spectra of biomolecules with an indirect detection probe? Are
the effects likely to be a problem, or not, when working with solid-state probes?
We have several different probes on this system and want to be sure that
capabilities are not lost or harmed.
Margaret
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Received on Tue May 30 2023 - 07:53:37 MST