User name A. Tobias
Log entry time 07:36:53 on August27,2003
Entry number 113628
keyword=NMR: 44.9 % and EPR: ?** This is the first NMR/EPR measurement since 13:00 yesterday **
06:27 Start moving from Empty Target to Polarized 3He Target
06:32 Ladder at Polarized 3He Target. Will wait for target chamber RTDs to stablize.
06:40 Start NMR measurement.
06:44 Complete NMR: 44.9%
06:55 As per "Instructions for EPR when Septum Current is > 300A" we need to set the C and D correction coils to the following current:
dBz/dy = I_read*0.1193-16.48
I_coil(c) = (dBz/dy - 0.6667)/13.33
For I_read=409.00A, I_coil(c)=+2.37412A
06:59 Set I_coil(c)=+2.37412A
07:00 Set I_coil(d)=-2.37412A
07:01 Jaideep finds EPR resonance at about 12MHz and does EPR: anywhere between 35 to 45% (signal is so choppy that it seems essentially useless).
07:04 Zero current to coil C
07:05 Zero current to coil D
07:08 Move back to Empty Target.
FIGURE 1
