α Source Calibration History for FY04 Run
The alpha calibration runs were taken with no beam in the AGS. The
calibration constant is given by the α energy (5486 keV) times the
attenuation factor (14 dB for most runs) divided by the mean of a gaussian fit
to the ADC distribution.
Plots:
α calibration constant vs. run
relative increase in calibration
constant between intial and final measurement. note: run 90004
used different attenuators and is not used in this plot.
Conclusions:
α calibration constants increased slightly over the course of
the run, 1.4% for the first set of detectors and 6.3% for the
second set.
maintained by: Jeff Wood, wood@physics.ucla.edu
last updated: 8/16/04