Hello Greg,
I can sympathize. Years ago one of our cryoprobes was prone to frequent
unscheduled warmups due to an unreliable chilled water supply. Very
frustrating.
The simple answer to your question is to type the command "*halt*" when=
you want to stop an acquisition, and then you type "*go*" when you want
to resume from where you left off. The command "*zg*" would start the
acquisition over from the start, which is clearly not what you would
like to do.
I must admit that it has been some time since I used the "*halt*" and
"*go*" commands, and even then it was for relatively simple 1D-NMR
experiments. I think you may run into issues if it doesn't run the
necessary number of dummy scans to achieve the steady state required for
some common 2D and 3D experiments.
I think the biggest problem you face is that the interruptions due to
chilled water issues are unpredictable.
The good thing is that for 2D and 3D experiments, the data are written
to disk after each indirect time increment. So, not all is lost when
the cryoprobe suddenly warms up.
Can I suggest a different approach? Use Non-Uniform Sampling when
acquiring 2D and 3D data to take advantage of random sampling of your
data space. That way, even if your experiment gets interrupted halfway
through, you should have data that covers the full range of the desired
space. And depending on the quality of the data, you may not need to try
to resume. Does that make sense?
Good luck,
Bob.
On 2023-07-10 6:44 a.m., Heffron, Gregory J. via groups.io wrote:
>
>
> Hi All,
>
> I write to ask the group if anyone knows how best to stop an
> acquisition in progress on Bruker NEO systems. We are somewhat
> familiar with commands to do this, but have not had much success in
> getting them to work. Specifically, we would like to be able to stop
> an acquisition in progress, then start it at a later time from the
> point it was stopped, OR be able to stop an acquisition, then restart
> it by calculating appropriate delays and add the data together when
> the total experiment is finished. We ask about this because we suffer
> occasionally from interruptions to experiments with cryoprobes due to
> cooling water issues.
>
> Any ideas are greatly appreciated, and we will post a summary.
>
> Best,
>
> Greg
>
> *Gregory J. Heffron*| Director,Biomolecular NMR Facility| Visiting
> Scientist, Dana-Farber Cancer Institute | Department of Cancer Biology
> *Harvard Medical School*240 Longwood Ave. | Boston, MA 02115 | Fax :617-432-4383
> *
> *
> **
--
Dr. Bob Berno
Manager, NMR Facility
McMaster University, ABB-156
1280 Main St. West
Hamilton, ON L8S 4M1
T: 905-525-9140 x24158 or x24686
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