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User name mack
Log entry time 15:50:18 on February 20, 1998
Entry number 46
keyword=Beam energies for replay_2
D. Mack
2/20/98
Beam energies for the Fpi experiment
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The first four energies were previously summarized in hc2125. Apparently I
never generated another energy measurement summary for the hclog although I did document
each measurement there. December 97 was pretty tough with a skeleton crew.
Clarification: We are going to use the Arc preliminary (ie, hclog-based) energy
values for replay. (We actually measure momentum, but E=p to a very good approximation.)
This is our best estimate for the beam energy BEFORE the target. The center of target
energies must be calculated in the analyzer. Some of the wrong energies were used for
replay_1. Close but not the same. The values in column 2 need to go into the replay_2
kinematics file. They also need to go into any run lists that Kelley generates.
Preliminary Replay_1
No. Arc Measurement Reference Setup Purpose Value
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1 .8449 mcc23646 1-pass/ optics .850 (unacceptable)
normal gradient
2 1.7954 mcc24396 2-pass/ optics 1.7955 (close)
high gradient
3 2.669 mcc25144 3-pass/ optics/physics 2.669 (same)
high gradient
4 3.549 mcc25744 4-pass/ optics/physics 3.5474 (unacceptable)
high gradient
5 3.007 hc2161 4-pass/ physics 3.007 (same)
low gradient
6 2.4464 hc2450 3-pass/ physics 2.4468 (close)
normal gradient
7 4.044 hc3021 5-pass/ physics 4.045 (unacceptable)
normal gradient
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