User name J. Singh
Log entry time 07:55:12 on October27,2005
Entry number 158149
keyword=TECH: Right Septum Tripfrom 0655 to 0720, the beam was gone due to RF cavity problems.
at 0734, the right septum tripped off. the beam current at the time looked like it was bordering on 60 µA. this is possibly the cause. the beam positions looked ok. the spot also looked ok. there had been a dithering cycle about 3 minutes before the septum trip. all the liquid levels looked ok.
luckily, the temps did not jump too high. the right upper coil temp peaked at 8.36K. the lower coil peaked at 8.00K. the yoke peaked at 5.69K. we asked for the beam to be off so that we can recover sooner.
fig 1 is the right septum magnet control after the trip but before recovery
fig 2 are the BPM and right septum strips
FIGURE 1
FIGURE 2
