[Halld-cal] BCAL calibration 2016

[Curtis Meyer]

Hi Mark,

 apriori, I would assume that you are safe, but presumably a simple comparison of the constants would be in order.
I also see no reason, not to put your 2016 numbers in, there are a small number of analyses that will benefit and lead to publications, if those are what the calibrations gave….

Curtis
---------
Curtis A. Meyer MCS Associate Dean for Research
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On Oct 18, 2017, at 7:06 PM, Sean Dobbs <s-dobbs at northwestern.edu<mailto:s-dobbs at northwestern.edu>> wrote:

Hi Mark,

I can't think of a reason offhand to not use the constants, but it would be interesting to compare their values.  The magnetic field was different between the two data sets, so maybe there is some hidden systematic there.

Cheers,
Sean

On Wed, Oct 18, 2017 at 6:06 PM Mark Macrae Dalton <dalton at jlab.org<mailto:dalton at jlab.org>> wrote:
Hi,

I have new calibration constants from 2016 data for the BCAL positions from the time differences.  Presumably this would address the issue that Mike observed.

I now wonder, is there any reason not to use the 2017 constants for the 2016?  (for effective velocities, timing, attenuation lengths etc.)  I cannot think of any myself.  I believe that we have already done this for the gains.  This is an already existing high statistics set of constants that gave good results on the 2017 data.

Best,
Mark Macrae Dalton



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