[Frost] About Beam polarization

[Sungkyun Park]

Hi Eugene and Steffen

I have a question about helicity signal.
In Table 5 of Steffen's CLAS-ANALYSIS 2004-118,
the helicity signal from TGBI-bank latch1 is changed by the half-wave-plate positions.
In our data, we also have half wave plate IN or OUT.

In CL data,  
  Period 1 (55521-55536) : half wave plate IN.
  Period 2 (55537-55555) : half wave plate OUT.
  Period 3 (55556-55595) : half wave plate IN.
  Period 4 (55604-55625) : no idea  
  Period 5 (55630-55678) : no idea
  Period 6 (56164-56193) : no idea  
  Period 7 (56196-56233) : no idea

Q1) In period1, 1(latch1) means beam-helicity is minus and in period2, 1(latch1) means beam-helicity is plus.
       That is, period 1 and period 2 has the different beam-helicity when they have the same value in latch1
       Is this right?
Q2) What are half-wave-plate from period 4 to period 7?

Eugene) Who is our next chef of g9b? Natalie?
             I will start the another job for DC-Calibration.

Sung
Florida State University
        





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