Aggregator

Log Number: 4524858Logbook(s): 

• ELOG
• RFLOG

Entry Makers: deirBody: 

Looks like Cav 2 is the cause.... See Figs 1-4.

Starting R192SINE value was 0.14166666666666677

Final R192SINE value was 2.3750000000000018

For reference here on out, the Peak Sum refers to the sum of the R19?WFSCRFPfft over the 150-200 Hz range.

See Figs 5-8. It's a bit difficult to tell where the optimal microstepper value is as I also had to move Cavity 1 tuner a tad to reduce the magnitude of the peak sum. It appears that there may still be a bit of tuner microphonics.

See Figs 9-11. Started nudging both tuners again.

Log Number: 4524857Logbook(s): 

• ELOG
• BTLOG

Body: IHA0L07 X-plane Emittance Measurement Analysis
qsUtility Data Analyzer V7-44
SDDS FILE: /cs/prohome/apps/q/qsUtility/7-44/fileio/data/IHA0L07/IHA0L07_x_zigzag_2026-07-15_03:25:42/IHA0L07_zigzag_2026-07-15_03:25:42_qsUtility_analyzer.sdds
HOSTNAME: opsl03 CED WORKSPACE: OPS CED LOGIN KEY: pro

Log Number: 4524856Logbook(s): 

• ELOG
• BTLOG

Body: Emittance Measurement: IHA0L07 X-plane
qsUtility zigzag_dataColletor V7-44
HOSTNAME: opsl03 CED WORKSPACE: OPS CED LOGIN KEY: pro

Log Number: 4524855Logbook(s): 

• ELOG

Entry Makers: deirBody: 

We'll be down for the night due to Arc2. DCP came in to take a look and found no obvious answers to the problem. They were able to turn it on locally only for it to immediately trip off, twice. Further trouble shooting would require paper work.

After talking with Director of Ops and Operability manager, the decision was made to hold off on any further investigation or repairs until morning. Beam is off at 7am anyway for the Arc5 dipole.

Log Number: 4524854Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: System Masking for: BeamLossMonitor
User: samari
Areas: All

BeamLossMonitor Devices:
ILM0I07
ILM0L01A
ILM0L01B
ILM0L02
ILM2D00A
ILM2D00B
ILM0L04A
ILM0L04B
ILM0L05
ILM0L06A
ILM0L08
ILM0R01
ILM4D00
ILM0R03
ILM0R04
ILM0R06
ILM0R08
ILM0R09
ILM1L01
ILM1L02
ILM6R08
ILM3S00
ILM7S00
ILM9S00
ILM5S10
ILM5E03
ILM7S01
ILM9A01
ILM3E02
ILM5A01
ILM1A04
ILM1A06
ILM1A09
ILM5A10
ILM1A16
ILM1A19
ILM3R10
ILM9R07
ILM1R09
ILM2L03
ILM5R10
ILM5R05
ILM2L01
ILM2T09
ILM8T09

Log Number: 4524853Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: Destination Masking to: Injector
User: samari

Log Number: 4524852Logbook(s): 

• ELOG

Entry Makers: samariBody: 

Since we have the time, I'll perform an emmittance measurement with every harp (IHA0L07->IHA0L10)

Log Number: 4524851Logbook(s): 

• ELOG

Body: 

Arc 2 faulted with an uninitiated fault. Initial non invasive troubleshooting revealed neither an internal or external interlock fault. Ops leadership determined to hold until morning.

Log Number: 4524847Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: 

The following box supplies were TURNED ON AND CYCLED ONCE by version 2-16 of the Box Supply Cycling Script:
ARC4A Ramp Rate = 10.989 A/s
ARC6A Ramp Rate = 9.222 A/s
ARC8A Ramp Rate = 11.962 A/s
ARCAA Ramp Rate = 12.234 A/s
RSEP8A Ramp Rate = 10.612 A/s

Log Number: 4524844Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: 

The following box supplies were TURNED OFF by version 2-16 of the Box Supply Cycling Script:
ARC4A Ramp Rate = 10.989 A/s
ARC6A Ramp Rate = 9.558 A/s
ARC8A Ramp Rate = 12.277 A/s
ARCAA Ramp Rate = 12.234 A/s
RSEP8A Ramp Rate = 10.920 A/s

Log Number: 4524842Logbook(s): 

• ELOG

Entry Makers: samariBody: 

Log Number: 4524841Logbook(s): 

• ELOG

Entry Makers: samariBody: 

Log Number: 4524840Logbook(s): 

• ELOG
• RFLOG

Entry Makers: msmithBody: 

Cavity 8 had just been Gset0 but then tripped the zone out of HV on low filament voltage. Bypassed cavity 8.

Log Number: 4524839Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 17422Title:
Arc 2 box supply not turning on

Summary:
When turning arc box supplies back on, Arc 2 would not come back up. The IOC heartbeat was communicating but the Box Supply heartbeat was not. DC Power on-call is on their way in.

Log Number: 4524838Logbook(s): 

• ELOG
• CLOG

Tags: 

• Autolog

Body: LEM 9.19.5 was successfully run for the South Linac on 2026-07-15 01:33:55. The application phase took 00:02:11 to complete.

Log Number: 4524837Logbook(s): 

• ELOG

Entry Makers: deirBody: 

DC-Power is on the way in for Arc2A.

Inj optics back to normal. Revisited steering to 1R and double checked phasing on NL cavities. Gained 0.3 MeV.

Took a 1E harp swipe, back to what we've expected.

Waiting on DCP now for Arc2.

Log Number: 4524836Logbook(s): 

• ELOG

Body: 

HYST AREA Version 7-0 has successfully cycled the following:

Area.Linacs.North

Total Time: 3.017 mins

Log Number: 4524835Logbook(s): 

• ELOG
• BTLOG

Body: 

Laser Used:

C Laser

Sigmas:

Peak 1 - x Sigma: 0.1479 Peak 2 - u Sigma: 0.2421 Peak 3 - y Sigma: 0.4718

Log Number: 4524833Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavities have been bypassed:
2L20-8
Username: msmith
Date/Time: 07-15-26_01:13:56
RF Status: Bad
Tuner Status: Good
Comment: Bypassed - stepped off +100k - Tripped zone out of HV on low filament voltage
Special Instructions:

Maintenance Tag: Component: Operator Entry - See SME

Log Number: 4524832Logbook(s): 

• ELOG

Body: 

Box Heartbeat came back but the supply is still not turning on.