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User name R. Michaels
Log entry time 21:31:39 on November21,2005
Entry number 160925
keyword=going to 0.1 uA
Beam Info at Mon Nov 21 21:24:40 EST 2005
Implemented the low-I BPM software.
Here is a reading of the BPMS before going to 0.1 uA
Average beam current: hac_bcm_average 0.627562
X position at 8: IPM1C08.XPOS 0.623602
Y position at 8: IPM1C08.YPOS 0.102411
X position at 12: IPM1C12.XPOS -0.209246
Y position at 12: IPM1C12.YPOS 0.138253
X position at 4A: IPM1H04A.XPOS 0.284921
Y position at 4A: IPM1H04A.YPOS -0.276051
X position at 4B: IPM1H04B.XPOS -0.258331
Y position at 4B: IPM1H04B.YPOS -0.402301
And here is a reading after going to 0.1 uA:
Beam Info at Mon Nov 21 21:26:02 EST 2005
Average beam current: hac_bcm_average 0.113107
X position at 8: IPM1C08.XPOS 0
Y position at 8: IPM1C08.YPOS 0
X position at 12: IPM1C12.XPOS 0
Y position at 12: IPM1C12.YPOS 0
X position at 4A: IPM1H04A.XPOS 0.255008
Y position at 4A: IPM1H04A.YPOS -1.22361
X position at 4B: IPM1H04B.XPOS 0.278361
Y position at 4B: IPM1H04B.YPOS -2.86251
Ok, now I remember. The readings do go crazy below 0.4 uA
but its a relative monitor. We will proceed, bravely hoping
the position didn't change (should check periodically at higher I).
Rates at 0.1 uA
T1 = 810 kHz
T2 = 135 kHz
T3 = 490 kHz
T4 = 410 kHz
T5 = T6 = 0
T7 = 570 kHz
T8 = 456 Hz
Turn on VDCs