User name Potterveld
Log entry time 16:41:26 on February 17,1998
Entry number 3702
This entry is a followup to: 3261
keyword=BM01 and BM02 hall probe reference dataThese are the reference data from April 1995 for the BM01 and BM02 hall probes.
These data were taken after the cables were cut and connectors attached for
the vacuum feedthroughs, ie, after all installation was complete. Absolute calibration
for BM01 comes from the comparison with NMR, and absolute calibration for BM02
comes via comparison with earlier data (one dataset measured just before the
feedthrough installation, and earlier data in which the probe for BM02 was
temporarily placed in BM01 and compared with NMR.)
Column headings are:
I1SET: Current setpoint for BM01
I1READ: Current readback for BM01
I2SET: Current setpoint for BM02
I2READ: Current readback for BM02
B1(0.3): Hall probe reading in Gauss for BM01 on 0.3 Tesla range
B1(0.6): Hall probe reading in Gauss for BM01 on 0.6 Tesla range
B1(1.2): Hall probe reading in Gauss for BM01 on 1.2 Tesla range
B1(3.0): Hall probe reading in Gauss for BM01 on 3.0 Tesla range
NMR: NMR reading in Gauss for BM01
B2(0.3): Hall probe reading in Gauss for BM02 on 0.3 Tesla range
B2(0.6): Hall probe reading in Gauss for BM02 on 0.6 Tesla range
B2(1.2): Hall probe reading in Gauss for BM02 on 1.2 Tesla range
B2(3.0): Hall probe reading in Gauss for BM02 on 3.0 Tesla range
B3: Hall probe for QUAD, temporarily installed in BM02
T1: temperature of BM01 probe
T2: temperature of BM02 probe
Note: The range used for BM01 and BM02 under normal conditions is always
the 3.0T range.
Also note: during installation, the probe for the QUAD was stressed, such that it
acquired a ~170 gauss zero offset. It has been separately calibrated.
- David Potterveld
FIGURE 1
