Aggregator
The following cavities have been UnGSET 0: 2L20-5
The following cavities have been UnGSET 0:
2L20-5
Username: kprice
Date/Time: 04-02-26_03:47:18
RF Status: Good
Tuner Status: Good
Comment: UnGSET 0 - stepped on -100k - Determined cavity was GSET0 by mistake; recovered
Special Instructions:
Maintenance Tag: Component: Operator Entry - See SME
Many MBC5S05V mistmatches
Downtime Incident CREATED: SHMS problems
"Hall C -> BNR"
iocsoftw3spce restored
QuickPic - MQA9A09 mismatch - setpoint taken and cycled
The following cavities have been GSET 0: 2L20-5
The following cavities have been GSET 0:
2L20-5
Username: kprice
Date/Time: 04-02-26_00:29:14
RF Status: Bad
Tuner Status: Good
Comment: GSET 0 - stepped off +100k - not stepped off, investigating why it was manually GSET0 on 31 Mar
Special Instructions:
Maintenance Tag: Component: Operator Entry - See SME
"Hall C -> 30 uA"
"Hall C -> 28 uA"
"Hall C -> 32 uA"
Hall C -> 40 uA
Operator SIGN IN
iCalibrate: Hall C
Operator SIGN IN
Hall C -> 4 cm dummy for 10 uA
AutoLog - UNMasking Hall C Normal Target
iCalibrate: Hall C
1 h 26 minute run
dpp based NL Gang phase lock
I had the idea that the difference between the Arc 3 and Arc 1 dpp would resolve to be sin of the phase error like if arc 3's phase center is slightly offset (below math is for 1 degree) to arc 1s:
cos(phi + 1*pi/180) -cos(phi)= cos(phi)cos(pi/180)-sin(phi)sin(phi/180)-cos(phi)
with small angle approximations you can reduce it to -pi/180*sin(phi). Which moves the lock point to a negative slope around phase error, making a NL gang phase lock possible. Implemented it and tuned the integral gain to correct on a range from 0.01 degrees to .1 degrees at an interval of 30 s.










