Log entry time 07:27:25 on November 7,2009

Entry number 298044

This entry is a followup to: 297771

Since MCC has trouble sending us beam higher than 85uA, we did fan speed at 40, 
50, 60Hz at beam currents 10, 20 and 85uA with raster size 6x6 in MCC unit.

Before we did fan speed test, three runs were taken at 85uA with fan speed at 
60Hz and raster size 2x2, 4x4 and 6x6 (all mcc unit) to repeat raster size test 
done yesterday owl shift. This is because when we did raster size test 
yesterday, the right arm Q1 was down while the one in left arm was fine. Rupesh 
mentioned that the lumi width would be quite different in this situation 
compared to both arm Q1 on or off. This is verified by the test.

1) raster size test results @85uA

 run  target raster size  good pairs   AsymNBlumiSum width (ppm)

 13774 LD2     6x6          9.8K         557.9

 13775 LD2     2x2         10.8K          6635

 13776 LD2     4x4          5.8K          1650  

while yesterday,

 13752 LD2     6x6          6.2K         592.3

 13753 LD2     4x4          8.7K          1874

 13754 LD2     2x2         13.7K          7361

2) fan speed test, raster size 6x6 in MCC unit

  run || target || current || fan speed || #pairs || AsymNBlumiSum width

  13774   LD2         85uA      60Hz         9.8K         557.9

  13777   LD2         85uA      50Hz         6.7K         840

  13778   LD2         85uA      40Hz         7.8K         2088

  13780   LD2         20uA      40Hz         6.7K         293.3
  
  13781   LD2         20uA      50Hz         6.6K         280.6

  13782   LD2         20uA      60Hz         7.1K          274

  13784   LD2         10uA      60Hz         6.9K         448.9

  13787   LD2         10uA      50Hz         9.3K         459.8

  13788   LD2         10uA      40Hz         8.1K         471.6