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User name Sulkosky
Log entry time 16:57:00 on August19,2003
Entry number 111886
keyword=EPR AFP Loss Tests
EPR AFP loss tests I
Septum Iread = 349.5A
Correction Coil C = 1.9A
Correction Coil D = -1.9A
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Results from 0th order fit:
time Down shift Up shift
11:29 43.2% 42.6%
11:31 42.2% 41.9%
11:33 41.8% 41.5%
11:35 41.2% 40.6%
11:37 40.8% 40.4%
Total loss for five measurements = 2.3%
Absolute loss = 0.256%/sweep
Relative loss = 0.59%/sweep
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Results from 1st order fit:
Total loss for five measurements = 2.62%
Absolute loss = 0.291%/sweep
Relative loss = 0.68%/sweep
EPR AFP loss tests II
Septum Iread = 397.75A
Correction Coil C = 2.2A
Correction Coil D = -2.2A
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Results from 0th order fit:
time Down shift Up shift
11:29 39.2% 38.9%
11:31 39.1% 38.4%
11:33 38.2% 37.5%
11:35 37.4% 37.2%
11:37 36.7% 36.5%
Total loss for five measurements = 2.45%
Absolute loss = 0.272%/sweep
Relative loss = 0.69%/sweep
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Results from 1st order fit:
Total loss for five measurements = 2.65%
Absolute loss = 0.294%/sweep
Relative loss = 0.75%/sweep
Note: Using the vertical correction coils for EPR helps lower the AFP loss at high Septum currents. At 400A on the Septum and no correction, the EPR AFP loss is about 2.3%/sweep (relative).