[Halld-cal] Correct values for NSA/NSB

[William McGinley]

Sure, I can check how much we need to scale the BCAL gains to stay
consistent after this change..

Will

On Tue, Mar 29, 2016 at 1:55 PM, Michael Staib <mstaib at andrew.cmu.edu>
wrote:

> Hi All,
>
> I have pushed a branch to Github, called f250_NSA_NSB, that grabs the
> correct values for NSA and NSB from the flash registers when the BOR record
> is available. My thoughts are to leave the code on a branch for now until
> calibration constants are ready for the fixed values.
>
> In case you are unaware from previous meetings, it was found that NSB = 0
> is an invalid setting on the current version of the f250. For the BCAL, the
> configuration file had NSB = 0 and NSA=26, FCAL, NSB = 0 and NSA=15, so we
> were subtracting off 26 and 15 samples of pedestal, respectively. In
> reality, on the flash NSB was being forced to 1. The new code will
> correctly subtract 27 and 16 samples from the BCAL/FCAL by grabbing these
> values from the registers. This will obviously cause some small shift in
> the energy calibrations.
>
> If you think I should just pull the fix into the master branch, let me
> know.
>
> --
> Michael Staib
> Graduate Student, Dept. of Physics
> Carnegie Mellon University
> mstaib at cmu.edu
> phone: 412-268-2983
>
>
>
>
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