User name vacheret & paschke
Log entry time 18:19:01 on June27,2002
Entry number 86888
keyword=PZT and IA feedback testsImportant: We have promised our Hall B friends that we will
not to screw around with our feedback systems anymore, until
after midnight tonight.
First, a quick calibration of the IA cell response:
Time...Run#...V_IA..VPZTx...VPXTy...#events....asym_bcm1
16:14..1279........5.0.......5.0............5.0.........12k........326 +/- 4
16:28..1280........1.0.......5.0............5.0.........11k.......-706 +/- 4
16:35..1281........9.0.......5.0............5.0.........11k.......1641+/- 4
16:56..1282........3.75.....5.0............5.0.........11k...........29 +/-7
17:04..1283.........fdbk....5.0............5.0.........68k............-17+/-2
Analysis of the feedback run is shown here. We are pleased with
the convergence. The slope used for IA response in Run 1283
was about 243 ppm/V, while a more careful calibration estimates
a slope of approximately 280 ppm/V, so this difference may have
slowed the final convergence.
FIGURE 1
FIGURE 2
