Aggregator

Phaser Results

1 day 3 hours ago
Log Number: 4540603Logbook(s): Body: Results where Job # is 1058 {6} CAVITY PHASE ERROR (DEGREES) OUTCOME PHASE (DEGREES) START DATE DURATION (SECONDS) CORRECTION DATE CORRECTION ERROR REASON 1L20-2 -1.17 CORRECTED 108.75 10-Aug-2026 17:17 59<
shriner

NL GP correction

1 day 3 hours ago
Log Number: 4540602Logbook(s): Entry Makers: shrinerBody: 

When we first sent beam it only made it to 1L06, but after a 69 degree change in GP we were able to reach the 1R dump. Hand-phased and now running phaser on several cavities.

shriner

Adjusting Hall B Current Settings - B Laser Amplifier is now at 1.5 A

1 day 4 hours ago
Log Number: 4540599Logbook(s): Entry Makers: suleimanBody: 

Ops requested finer control of the Hall B beam current, which is currently running at 3.5 nA.

With the attenuator set to 1000 and the Hall B amplifier at 3 A, we measured 22 mW of laser power (Figures 1 and 2). Reducing the amplifier current to 2 A produced 9 mW, while 1.5 A produced 4.4 mW.

I left the Hall B amplifier at 1.5 A (Figure 3). Previously, the attenuator provided approximately 0.5 nA per step. With this change, the step size should now be approximately 0.1 nA per step, providing significantly finer control of the Hall B beam current.

The only issue is that this change will cause the automated TMG health check for Laser B to fail. Max will need to adjust the settings used for this measurement.

suleiman

FSD Masking Tool: Successful System UN-Masking for: BeamLossMonitor

1 day 4 hours ago
Log Number: 4540595Logbook(s): Tags: Body: System UN-Masking for: BeamLossMonitor
User: lrichard
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
IL
lrichard

COMMENT ON RF Maintenance for the week of August 10th through August 16th, 2026

1 day 4 hours ago
Log Number: 4540594Logbook(s): Body: 

Replaced RFCM's in 2L13-2 and 1L06-4 and recovered RF and optimized, Recovered 1L15 and 1L20 and about a half dozen others that I didn't see faults or problems with. Lost 1L15-2 to the klystron resistor, DC Overload again for the eighth time and this will need all HV checked out. 1L15-7 lost about half it's gradient when drive lost. It had been SOSing per OPS during beam so the 2.5 w amp and driveline needs checked on it. Handed machine back to OPS at 1630.

kerns

1L15-7 Lost about half it's drive

1 day 4 hours ago
Log Number: 4540582Logbook(s): Entry Makers: kernsBody: 

GASK is at 2.5v with 0 RATN at 5Mv/m. Klystron output looks good but drive was running at ~12.4 Mv/m at 550 am this morning before shutdown. Started SOS'ing as someone revovered it to HV/RF after cav 2 repairs. Also looks like cavity 2 blew yet another klystron 50 ohm load and DC overloaded when brought back to HV. No KCCU but I noticed it had momentary KCCU when I saw it go into ramp up.

kerns

FSD Masking Tool: Successful System Masking for: BeamLossMonitor

1 day 4 hours ago
Log Number: 4540577Logbook(s): Tags: Body: System Masking for: BeamLossMonitor
User: lrichard
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
ILM8T
lrichard

Operator SIGN IN

1 day 4 hours ago
Log Number: 4540560Logbook(s): Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Humphry
DATE:             08/10/2026
SHIFT:               Swing

The operator has read the following:
  • ELOG
  • PD Shift Plan
  • Radiation Surveys for PSS Segments in Controlled Access
  • PSS Log
chumphry

Shift Information

Shift Swing
CEBAF Program
MCC Crew Chief Richardson
MCC Operators Anthony, Humphry, Shriner
Program Deputy Latosky
Announcements

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