User name P. Monaghan
Log entry time 05:03:31 on January 8,2005
Entry number 138464
keyword=Powering up BigBite magnetWe ramped up the BigBite magnet successfully in 100A increments with the following results:
Current Field BPMB X BPMB Y
100 A 0.183 T -0.071 0.155
518 A 0.932 T -0.066 0.320
The BPMB x and y values did not change as the current went up from 100A to 400A (however, this may have been due to the readback values taking a long time to update).
We noticed on the BeO viewer that the spot appeared to move by ~ 5mm in the horizontal direction (to the left on the monitor screen).
The spot++ picture shown below gives the x and y positions to be -0.3 and 0.76 respectively; previously, the values given by spot++ were -0.04 and 0.57 in x and y.
The magnet appears to steer the beam a little in the horizontal direction and we will ask MCC to correct for this.
FIGURE 1
