Log entry time 17:22:13 on January11,2003

Entry number 91491

keyword=IA Scan

Insertable waveplate was changed during this shift.
Feedback expert should be paged, whenever this occurs.. This changes the sign and perhaps the magnitude of our IA Slope.

14:00 Start IA Scan to obtain new slope.



Run    IA Setpoint    Q_A

1226        5         1321

Problem with Fast Feedback for beam position. MCC takes an access to the injector to fix it. Should be about an hour. Will continue the scan after the access.

For fun... do a Parity Run to check our pedestals... Run 1227
Moved signal for x3 Downstream BCM from ADC2_2 to ADC0_0
Another pedestal run: Run 1228

Continue IA scan RWP=6725



Run    IA Setpoint    Q_A

1229        1         2336

1230        5         1556

1231        9         778

Unacceptable... because when you change the Insertable Waveplate, the Rotatable Waveplate must also be changed.

New IA Scan RWP=6435



Run    IA Setpoint    Q_A

1232        9         -387

1233        5         385

1234        1         1163

1235        7         10

Feel better now, we have a zero charge asymmetry around 7 that's the starting value for the IA. The slope is -193ppm/V

I put (antonin) back the feedback on after the scan.
Next step is a halfwave plate scan with hall C during the evening or during the night...

User name Moffit/Vacheret

Log entry time 17:22:13 on January11,2003

Entry number 91491