[d2n-analysis-talk] Fwd: LHRS Scintillator Calibration Study

[Brad Sawatzky]

On Wed, 03 Mar 2010, David Flay wrote:

> Oddly, when using transversity's scintillator time offset calculations (only
> done for S2m I believe), I obtain the plots attached, which to me, seem to
> put us worse off than as they were originally.  I think I may run through
> the calibration scripts myself and see what I come up with (based off of the
> original numbers I had in the db_L.s1.dat, db_L.s2.dat files).

If I squint a bit I can almost convince myself that the several of the
paddles (2, 3, 6, 9, 10,12) are 2ns too low, and 5 is 4ns too low.  I
gather these were aligned using the 2ns period RF clock -- perhaps some
paddles were aligned to the wrong RF clock cycle?  I'm looking at the
S2m time-offsets plot in scint_toffs_trans_3_3_10.pdf.

-- Brad

-- 
Brad Sawatzky, PhD <brads at jlab.org>  -<>-  Jefferson Lab / Hall C / C111
  Ph: 757-269-5947 -<>- Pager: 757-584-5947 -<>- Fax: 757-269-7848
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