Aggregator

Log Number: 4507988Logbook(s): 

• ELOG

Body: 

What's the latest on this?

Log Number: 4507987Logbook(s): 

• ELOG

Body: 

What's the latest on this?

Log Number: 4507986Logbook(s): 

• ELOG
• LERFLOG

Body: 
THOMAS JEFFERSON NATIONAL ACCELERATOR FACILITY
ACCELERATOR OPERATIONS CREW CHIEF SIGN IN FORM

Date : 06-03-26
Time : 07:22:04
Day : Wednesday
Shift : Day

Crew Chief : Howard
Program Deputy: Moser
Team : D
Arm : RADCON
Designated SSO: Thomas
LERF Operator:
Operators : Thomas

This stamp certifies that the above Crew Chief has read/reviewed/received the following:

Log Number: 4507984Logbook(s): 

• ELOG

Tags: 

• ShiftSummary

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: Inj in M0; NL->Halls in RA

Log Number: 4507983Logbook(s): 

• ELOG

Tags: 

• BeamAccounting

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

Log Number: 4507982Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl632

Saved: samari 06-03-26 07:12:23 {A:i B:1 C:3 E:1060 A=BS B=BS C=CW D=BS 0R08=0.00 0R08 dump in. dump(s) in.

Log Number: 4507981Logbook(s): 

• ELOG

Entry Makers: samariBody: 

Laser phases seem to have all shifted a degree or so, and I just lightly steered to get back to the 99% transmission + rels. Figs 2, 3, and 4 are C, B, and D orbits to rels.

Log Number: 4507980Logbook(s): 

• POLOG
• ELOG

Entry Makers: samariBody: 

Based on the comments by joe on the BSList I experimented a bit to get a good idea of what I was measuring (i.e. the constant bleedthrough or the structure of the tail). It was a bit hard to plot the data nicely, but a small log scale script with a linear subplot seems to be the best visualization. But afterwards I was able to do some good scans with the proposed conditions. See the two attached logs. I forgot to do D beam at the 20 position, so it's attached here, and I wanted to see what the increased current to C would reveal more structure, which it didnt much.

Log Number: 4507979Logbook(s): 

• DCLOG
• ELOG

Entry Makers: shrinerBody: 

took setpoint and cycled

Log Number: 4507978Logbook(s): 

• POLOG
• ELOG

Entry Makers: samariBody: 

These practically eliminated the bleedthrough, but very interesting to see! Very slight bumps with C laser at 60 uA at 60 and 120 degrees, but not even a consistent .1 nA. B laser is very clean with the slit at 20.

Log Number: 4507977Logbook(s): 

• ELOG

Body: 
Scan Configuration: Input Channels NameChannelStart ValueStop ValueStep SizeDelay (sec)Initial ValueCurrent Value Chopper 1,2 gangedR01XPSETCG-17918012180180

<table border=1 cellpadding = 1 cellspacin

Log Number: 4507976Logbook(s): 

• ELOG

Body: 
Scan Configuration: Input Channels NameChannelStart ValueStop ValueStep SizeDelay (sec)Initial ValueCurrent Value Chopper 1,2 gangedR01XPSETCG-17918012180180

<table border=1 cellpadding = 1 cellspacin

Log Number: 4507975Logbook(s): 

• POLOG
• ELOG

Entry Makers: samariBody: 

Used B, C, and D lasers all scanned from -180 to 180 on chopper phase with 10 uA CW and the prebuncher off. C and B lasers both have a ~.4 nA bump around 60 degrees of chopper gang phase after the main packet.

Log Number: 4507974Logbook(s): 

• DCLOG
• ELOG

Entry Makers: shrinerBody: 

took setpoint and cycled. actually will swap the card next mismatch.

Log Number: 4507973Logbook(s): 

• ELOG

Body: 
Scan Configuration: Input Channels NameChannelStart ValueStop ValueStep SizeDelay (sec)Initial ValueCurrent Value Chopper 1,2 gangedR01XPSETCG-17917912180180

<table border=1 cellpadding = 1 cellspacin

Log Number: 4507972Logbook(s): 

• ELOG

Body: 
Scan Configuration: Input Channels NameChannelStart ValueStop ValueStep SizeDelay (sec)Initial ValueCurrent Value Chopper 1,2 gangedR01XPSETCG-17917912180180

<table border=1 cellpadding = 1 cellspacin

Log Number: 4507971Logbook(s): 

• ELOG

Body: 
Scan Configuration: Input Channels NameChannelStart ValueStop ValueStep SizeDelay (sec)Initial ValueCurrent Value Chopper 1,2 gangedR01XPSETCG-17917912180180

<table border=1 cellpadding = 1 cellspacin

Log Number: 4507970Logbook(s): 

• ELOG

Body: 
Scan Configuration: Input Channels NameChannelStart ValueStop ValueStep SizeDelay (sec)Initial ValueCurrent Value Chopper 1,2 gangedR01XPSETCG-17917912180180

<table border=1 cellpadding = 1 cellspacin

Log Number: 4507969Logbook(s): 

• ELOG

Body: 
Additional Comments:
Forced Pico, floor is .002512 uA (beam off)

Log Number: 4507968Logbook(s): 

• ELOG

Body: 
Additional Comments:
No 1500 MHz structure aparent. trying again at higher current.