Aggregator

Log Number: 4503307Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Janak
DATE:             05/23/2026
SHIFT:               Day

The operator has read the following:

• ELOG
• PD Shift Plan
• Radiation Surveys for PSS Segments in Controlled Access
• PSS Log

Log Number: 4503306Logbook(s): 

• ELOG

Tags: 

• ShiftSummary

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: Restoring to BCD

Log Number: 4503305Logbook(s): 

• ELOG

Tags: 

• BeamAccounting

Body:  Accelerator PHYSICS STUDIES RESTORE ACC DOWN OFF (SAM) Planned 8 0 0

Log Number: 4503303Logbook(s): 

• ELOG

Entry Makers: schoeneBody: 

Hall requests controlled access to troubleshoot a chiller that has dropped to zero flow.

Log Number: 4503302Logbook(s): 

• ELOG
• HBLOG

Body: 

Channels: ISD2H001HALORATE01, IBC3H00CRCUR4, IBCAD00CRCUR6, IPM2C21A

after stoping the beam the midstream halo counter jump too high (47k).

Log Number: 4503295Logbook(s): 

• ELOG

Entry Makers: chumphryBody: 

Log Number: 4503293Logbook(s): 

• ELOG

Entry Makers: chumphryBody: 

Log Number: 4503292Logbook(s): 

• ELOG

Entry Makers: janakBody: 

Previous harp scans identified a tail in the y-direction.
Fig. 1 - Verified using the 2C24 viewer with the Hall C slit closed to ensure it wasn't bleedthrough.
Fig. 2 - Adjusting MQR2C17 +2500 had a positive effect.
After many harp swipes, +1000 to 2C17 and -3000 to 2C20 got us to an acceptable profile. This elog is to accompany Kirsten's with pictures.

Log Number: 4503291Logbook(s): 

• BTLOG
• ELOG

Entry Makers: kirstendBody: 

Top line summary: 2C17 for tail control, 2C20 for horizontal only changes on 2H00A.

Reminder: xB optics for final two triplets (last six quads) are at https://logbooks.jlab.org/entry/4501081 , not in CED.

Log Number: 4503290Logbook(s): 

• ELOG

Entry Makers: chumphryBody: 

Hall B accepts current 2H00A Harp scan.
Dumplett in for install of target

Log Number: 4503289Logbook(s): 

• HBLOG
• ELOG

Body: 

Comments

Log Number: 4503287Logbook(s): 

• HBLOG
• ELOG

Body: 

Comments

Log Number: 4503286Logbook(s): 

• ELOG

Entry Makers: schoeneBody: 

We had a brief interlude of BLM trips, sorted by running beam to the 5C dumplette and allowing the upper pass locks to steer in. xC/D now taking production beam, still wrangling xB beam size with the aid of the xB APEL.

Log Number: 4503285Logbook(s): 

• HBLOG
• ELOG

Body: 

Comments

Log Number: 4503281Logbook(s): 

• HCLOG
• ELOG

Entry Makers: chandanBody: 

Received a call from Hall C informing that there is a yellow alarm.
The 15K cryo return pressure was below 1.5 atm (from 2.6 atm last night).
All other target parameters seems normal.

This will not affect target operation.
Talked with Silviu and Dave Meekins regarding this.
Dave Meekins said that he will contact cryo on-call to look into this.

I'll keep monitoring the system from home.

Log Number: 4503280Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: System UN-Masking for: BeamLossMonitor
User: janak
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

Log Number: 4503279Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: System UN-Masking for: BeamLossMonitor
User: schoene
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
ILM

Log Number: 4503277Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: System Masking for: BeamLossMonitor
User: schoene
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
ILM8T0

Log Number: 4503272Logbook(s): 

• HBLOG
• ELOG

Body: 

Comments

Log Number: 4503271Logbook(s): 

• HBLOG
• ELOG

Body: 

Comments