[Halld-cal] FCal hit timing

[Alexander Austregesilo]

OK, I committed the change. You can look at the new plot soon since will 
have another monitoring launch tomorrow.

Best regards,

Alex


On 11/13/2017 02:44 PM, Shepherd, Matthew wrote:
> Alex,
>
> I agree with your reasoning -- it makes sense to cut the range so that the RMS is dominated by the width of the core distribution.
>
> Matt
>
> ---------------------------------------------------------------------
> Matthew Shepherd, Professor
> Department of Physics, Indiana University, Swain West 117
> 727 East Third Street, Bloomington, IN 47405
>
> Office Phone:  +1 812 856 5808
>
>> On Oct 27, 2017, at 11:36 AM, Alexander Austregesilo <aaustreg at jlab.org> wrote:
>>
>> Hi Matt, Colin, FCal group,
>>
>> Yesterday, I changed the z-axis scale of the monitoring histogram for the "FCAL Local Hit Time RMS" such that the values actually fall in to the range. I attached the histogram, where the RMS is around 25ns.
>>
>> On  the other hand, I am not sure if you want to monitor exactly this value. It is dominated by very large |t-t0| values above 20ns (sometimes as large as 400ns!). These do not show up in the 1D histogram, therefore the RMS of the 1D histogram is only around 5ns. If you want the same value in 2D, I would put a cut on |t-t0| < 20 on the histograms.
>>
>> Let me know what you think. I can easily implement this change.
>>
>> Cheers,
>>
>> Alex
>>
>> <fcal_hit_timing.png>