Aggregator
CREW CHIEF SIGN IN
THOMAS JEFFERSON NATIONAL ACCELERATOR FACILITY
ACCELERATOR OPERATIONS CREW CHIEF SIGN IN FORM
Date : 04-29-26
Time : 23:32:56
Day : Wednesday
Shift : Owl
Crew Chief : Howard
Program Deputy: Sereno
Team : D
Arm : Chaudhary
Designated SSO: Christian
LERF Operator:
Operators : Price, Chaudhary, Christian
This stamp certifies that the above Crew Chief has read/reviewed/received the following:
Injector Restoration, D Moved From B to A Slit
Steered beam from the gun to the ILD without much trouble. Fig. 1 is the initial orbit and 2 the final orbit, both with C beam. Fig. 3 is B beam and 4 is D beam. Fig. 5-8 show the chopper viewer as found, with D beam on the B slit, and D beam moved to the A slit by way of the laser phase the SME recommended a few nights ago. As shown in Fig. 9-11, collinearity with D beam was unfortunate after this change, so I walked the laser phase back a few degrees until it was... more passable. Harp scan at 0L10 was very close to the prior one, so I think we might be okay in the injector.
HYST AREA 7-0 Cycles Magnets
HYST AREA Version 7-0 has FAILED to cycle:
MQA9A21 -- E501B11 -- ea5mag -- Failed to set after 2 cycle attempts
HYST AREA Version 7-0 has successfully cycled the following:
Area.Linacs.North
Area.Linacs.South
Area.Arcs.Arc1.Spreader
Area.Arcs.Arc1.Arc
Area.Arcs.Arc1.Recombiner
Area.Arcs.Arc1.Extraction
Area.Arcs.Arc2.Spreader
Area.Arcs.Arc2.Arc
Area.Arcs.Arc2.Recombiner
Area.Arcs.Arc2.Extraction
Area.Arcs.Arc3.Spreader
Area.Arcs.Arc3.Arc
Area.Arcs.Arc3.Recombiner
FSD Masking Tool: Successful System UN-Masking for: CryoModule
User: shriner
Areas: NorthLinac SouthLinac
CryoModule Devices:
1L14
1L03
1L02
1L04
1L05
1L07
1L06
1L08
1L09
1L10
1L11
1L12
1L15
1L13
1L16
1L19
1L17
1L18
1L20
1L21
1L22
1L23
1L24
1L25
1L26
2L14
2L03
2L02
2L04
2L05
2L07
2L06
2L08
2L11
2L09
2L10
2L12
2L15
2L13
2L16
2L19
2L17
2L18
2L20
2L21
2L22
2L23
2L24
2L25
2L26
Crew Chief Shift Log, 2026-04-29 SWING
Start of shift: CEBAF down due to LCW leak.
Crew Chief Timesheet Summary: 29 Apr 2026 SWING
HarpFitter: IHA0L10
"Cycled Boxes 4x for Arcs, R/Xsepts"
Box Supplies Were Cycled
The following box supplies were CYCLED by version 2-16 of the Box Supply Cycling Script:
ARC1A Ramp Rate = 7.400 A/s
ARC2A Ramp Rate = 7.131 A/s
ARC3A Ramp Rate = 4.842 A/s
ARC4A Ramp Rate = 10.118 A/s
ARC5A Ramp Rate = 9.280 A/s
ARC6A Ramp Rate = 8.810 A/s
ARC7A Ramp Rate = 9.277 A/s
ARC8A Ramp Rate = 11.432 A/s
ARC9A Ramp Rate = 4.625 A/s
ARCAA Ramp Rate = 11.712 A/s
RSEP8A Ramp Rate = 10.544 A/s
RSEP9A Ramp Rate = 9.166 A/s
XSEP2T Ramp Rate = 5.386 A/s
XSEP4T Ramp Rate = 5.142 A/s
XSEP6T Ramp Rate = 9.105 A/s
XSEP8T Ramp Rate = 17.841 A/s
XSEPAT Ramp Rate = 15.209 A/s
Box Supplies Were Cycled
The following box supplies were CYCLED by version 2-16 of the Box Supply Cycling Script:
ARC1A Ramp Rate = 7.400 A/s
ARC2A Ramp Rate = 7.131 A/s
ARC3A Ramp Rate = 4.718 A/s
ARC4A Ramp Rate = 10.118 A/s
ARC5A Ramp Rate = 9.280 A/s
ARC6A Ramp Rate = 9.299 A/s
ARC7A Ramp Rate = 9.277 A/s
ARC8A Ramp Rate = 11.432 A/s
ARC9A Ramp Rate = 9.300 A/s
ARCAA Ramp Rate = 11.712 A/s
RSEP8A Ramp Rate = 10.544 A/s
RSEP9A Ramp Rate = 9.166 A/s
XSEP2T Ramp Rate = 5.386 A/s
XSEP4T Ramp Rate = 5.142 A/s
XSEP6T Ramp Rate = 9.105 A/s
XSEP8T Ramp Rate = 17.841 A/s
XSEPAT Ramp Rate = 15.209 A/s
Box Supplies Were Cycled
The following box supplies were CYCLED by version 2-16 of the Box Supply Cycling Script:
ARC1A Ramp Rate = 3.970 A/s
ARC2A Ramp Rate = 7.131 A/s
ARC3A Ramp Rate = 9.272 A/s
ARC4A Ramp Rate = 10.118 A/s
ARC5A Ramp Rate = 9.280 A/s
ARC6A Ramp Rate = 9.299 A/s
ARC7A Ramp Rate = 9.277 A/s
ARC8A Ramp Rate = 11.432 A/s
ARC9A Ramp Rate = 8.810 A/s
ARCAA Ramp Rate = 11.712 A/s
RSEP8A Ramp Rate = 10.544 A/s
RSEP9A Ramp Rate = 8.813 A/s
XSEP2T Ramp Rate = 5.386 A/s
XSEP4T Ramp Rate = 5.142 A/s
XSEP6T Ramp Rate = 9.105 A/s
XSEP8T Ramp Rate = 16.057 A/s
XSEPAT Ramp Rate = 15.209 A/s
"FC2 unlocked"
MXC7S06M mismatched, DCP on call helped resolve
When cycling boxes, MXC7S06 mismatched with noise fault. Similar occurance on 4/12 day shift, but sliding the current didn't work.
DCP on call instructed us to:
Take the dipole and shunts for ARC7 to 0, power off, and then power back on.
We did this, went to setpoint 2, and cycled.
Seems to have resolved the issue
Box Supplies Were Cycled
The following box supplies were CYCLED by version 2-16 of the Box Supply Cycling Script:
ARC1A Ramp Rate = 7.400 A/s
ARC2A Ramp Rate = 6.712 A/s
ARC3A Ramp Rate = 4.718 A/s
ARC4A Ramp Rate = 11.130 A/s
ARC5A Ramp Rate = 9.280 A/s
ARC6A Ramp Rate = 9.299 A/s
ARC7A Ramp Rate = 9.991 A/s
ARC8A Ramp Rate = 11.432 A/s
ARC9A Ramp Rate = 8.810 A/s
ARCAA Ramp Rate = 10.811 A/s
RSEP8A Ramp Rate = 10.544 A/s
RSEP9A Ramp Rate = 8.813 A/s
XSEP2T Ramp Rate = 5.386 A/s
XSEP4T Ramp Rate = 5.142 A/s
XSEP6T Ramp Rate = 9.105 A/s
XSEP8T Ramp Rate = 16.057 A/s
XSEPAT Ramp Rate = 15.209 A/s
FSD Masking Tool: Successful System Masking for: CryoModule
User: bschauml
Areas: NorthLinac SouthLinac
CryoModule Devices:
1L14
1L03
1L02
1L04
1L05
1L07
1L06
1L08
1L09
1L10
1L11
1L12
1L15
1L13
1L16
1L19
1L17
1L18
1L20
1L21
1L22
1L23
1L24
1L25
1L26
2L14
2L03
2L02
2L04
2L05
2L07
2L06
2L08
2L11
2L09
2L10
2L12
2L15
2L13
2L16
2L19
2L17
2L18
2L20
2L21
2L22
2L23
2L24
2L25
2L26










