[dsg-hdice] fsNMR program broken when using background files

[thomaso at jlab.org]

Hi Tyler,

Thank you for working on this for us so quickly.  Xiangdong and I will set
up a new scan and check it out soon.

Thanks,
Tom

> Hi Tom,
>
> I tried logging in to HDiceNMR2 and it was available, so I just went a
> head and made the update.
>
> As always, the latest version is the one on the hdice user desktop under
> "fsNMR - LATEST".
>
> The new version tries the Gaussian peak fit and if the result is NaN (as
> in the peak fit doesn't work), the program just uses the absolute maximum
> of the background amplitude for instead of the Gaussian fit.
>
> Tyler
> ________________________________
> From: dsg-hdice <dsg-hdice-bounces at jlab.org> on behalf of Tyler Lemon
> <tlemon at jlab.org>
> Sent: Thursday, October 29, 2020 8:32 AM
> To: thomaso at jlab.org <thomaso at jlab.org>
> Cc: dsg-hdice at jlab.org <dsg-hdice at jlab.org>
> Subject: Re: [dsg-hdice] fsNMR program broken when using background files
>
> Hi Tom,
>
> 8:30 - 9:30 is fine. I can log on now if the PC is available.
>
> I was able to make the change a head of time using previous runs' data, so
> I don't expect it to take too long to add the new code.
>
> Tyler
> ________________________________
> From: thomaso at jlab.org <thomaso at jlab.org>
> Sent: Wednesday, October 28, 2020 5:58 PM
> To: Tyler Lemon <tlemon at jlab.org>
> Cc: thomaso at jlab.org <thomaso at jlab.org>; dsg-hdice at jlab.org
> <dsg-hdice at jlab.org>
> Subject: Re: [dsg-hdice] fsNMR program broken when using background files
>
> Hi Tyler,
>
> I spoke to Xiangdong to figure out a time when we don't need control of
> HDiceNMR2.  Would you be free tomorrow morning to take a look at the
> program between 8:30AM and 9:30AM?
>
> That small time window is after we complete a full night scan and before
> the beam is brought back up for Run 2.
>
> Let us know if that time frame works for you tomorrow.  If not we'll try
> to figure out another.
>
> Thanks,
> Tom
>
>
>
>> Hi Tom,
>>
>> Thanks for the info.
>>
>> I have a morning and early afternoon filled with BlueJeans meets, so
>> I'll
>> plan to take a look on one of the HDice PCs around 3:00PM.
>>
>> I have a few data sets from fsNMR runs saved locally on one of DSG's PCs
>> so in the mean time between meetings, I'll look through those data sets
>> to
>> see if there's a set that doesn't have a peak and use that to start
>> offline development of the fix.
>>
>> Thanks,
>> Tyler
>> ________________________________
>> From: thomaso at jlab.org <thomaso at jlab.org>
>> Sent: Wednesday, October 28, 2020 9:46 AM
>> To: Tyler Lemon <tlemon at jlab.org>
>> Cc: thomaso at jlab.org <thomaso at jlab.org>; dsg-hdice at jlab.org
>> <dsg-hdice at jlab.org>
>> Subject: Re: [dsg-hdice] fsNMR program broken when using background
>> files
>>
>> Hi Tyler,
>>
>> Yes, use the overall maximum value for the background scaling.  I forgot
>> to mention that.  If you are ready now, we can log off the NMR PC so you
>> can check it out.  Let me know when you would like to start.
>>
>> Thanks,
>> Tom
>>
>>> Hi Tom,
>>>
>>> In the cases where there is no peak in the background data, how should
>>> the
>>> program handle it?
>>>
>>> Should it just use the overall maximum value in the background scaling?
>>>
>>> Tyler
>>> ________________________________
>>> From: dsg-hdice <dsg-hdice-bounces at jlab.org> on behalf of
>>> thomaso at jlab.org
>>> <thomaso at jlab.org>
>>> Sent: Tuesday, October 27, 2020 5:24 PM
>>> To: dsg-hdice at jlab.org <dsg-hdice at jlab.org>
>>> Subject: [dsg-hdice] fsNMR program broken when using background files
>>>
>>> Hi Tyler,
>>>
>>> Xiangdong and I confirmed the new 50 Ohm / 1 MOhm switch you added
>>> worked
>>> fine.
>>>
>>> However, we ran into a new issue with the fsNMR program.  We took a set
>>> of
>>> sweeps for our background without issue.  The problem arises when we
>>> select a previous background scan to use for subtraction during the
>>> signal
>>> scan.
>>>
>>> Normally the program looks for the peak value of the background curve
>>> as
>>> a
>>> step in the background normalization/subtraction process.
>>>
>>> In our case, we are looking for the signal in part of the curve.  There
>>> is
>>> no peak in the region we are scanning.  As a result, the program is
>>> unable
>>> to calculate values for R, X, and Y.  The frequency column is fine
>>> since
>>> those values are not manipulated.  The phase column is fine due to that
>>> being a straight subtraction between the two phase values (no
>>> normalization used).
>>>
>>> Could you please investigate this issue as soon as you can?  We can
>>> give
>>> you access to the PC anytime you need, just let us know.
>>>
>>> Thanks,
>>> Tom
>>>
>>> _______________________________________________
>>> dsg-hdice mailing list
>>> dsg-hdice at jlab.org
>>> https://mailman.jlab.org/mailman/listinfo/dsg-hdice
>>>
>>
>>
>>
>
>
>