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CREW CHIEF SIGN IN

14 hours 17 minutes ago
Log Number: 4468926Logbook(s): Body: 
THOMAS JEFFERSON NATIONAL ACCELERATOR FACILITY
ACCELERATOR OPERATIONS CREW CHIEF SIGN IN FORM

Date : 02-06-26
Time : 23:04:42
Day : Friday
Shift : Owl

Crew Chief : Price
Program Deputy: Mock
Team : D
Designated SSO: Smith
LERF Operator:
Operators : Smith

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

Improving Collinearity

14 hours 40 minutes ago
Log Number: 4468925Logbook(s): Entry Makers: bschaumlBody: 

I'm not going to bother too much with the C laser at the moment as the orbit is a bit wacky off the cathode; if it gets better, so be it.

Some better centering through the choppers and solenoids improved the horizontal collinearity of A and B, with the remaining mismatch able to be fixed by tweaking chopper X phases. I am unsure whether one should prioritize collinearity through the 0I and early 0L, or through the late 0L and 0R. I decided to let the prior suffer to the point of being just outside our 0.5 mm spec in exchange for what seems like very good orbits through the latter.

bschauml

Checking 0L03 & 0L04 Phase

16 hours 42 minutes ago
Log Number: 4468920Logbook(s): Entry Makers: bschaumlBody: 

With the booster properly phased again, 0L03 and 0L04 need to be checked. Both zones were around 23ish degrees off. Yesterday I had to add 0.2 MV/m total to the lock cavities relative to LEMi setpoints, perhaps to compensate for the booster phase being off, but today I had to reduce them by 0.2 MV/m relative to LEMi setpoints.

bschauml

Checking Booster Phasing

17 hours 12 minutes ago
Log Number: 4468919Logbook(s): Entry Makers: bschaumlBody: 

Found both cavity phases were not nominal. Crested both on the viewer (Fig. 1 & 2) and added the 26 (per Yan) degree offset to the seven cell (2L02-8). Set MDL0L02 for 6.74 MeV/c, cycled, and found that I needed to reduce the GSET of the seven cell to the value (10.09 MV/m) it was at for the prior run.

bschauml

VWien=0, HWien=10.5

20 hours 51 minutes ago
Log Number: 4468910Logbook(s): Entry Makers: bschaumlBody: 

V Wien was already set to 0 degrees, H Wien was changed from 0 to 10.5 per recent email about CIS desired spin settings. Resteered mostly with correctors and a small reduction of MWF1I06.

bschauml

Operator SIGN IN

21 hours ago
Log Number: 4468906Logbook(s): Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Schaumloffel
DATE:             02/06/2026
SHIFT:               Swing

The operator has read the following:
bschauml

Autolog save

21 hours 12 minutes ago
Log Number: 4468902Logbook(s): Tags: Body: saver ran from opsl01

Saved: bschauml 02-06-26 16:17:06 {A:5 B:3 C:1 E:340 A=BS B=BS C=BS D=BS 0R08=0.00 0R08 dump in. Autosave prior to restore.
bschauml

VTP0L04 High pressure

21 hours 30 minutes ago
Log Number: 4468899Logbook(s): Entry Makers: janakBody: 

At 8:40 am VTP0L04 started reading a high pressure alarm. This seems to be an after effect of an earlier event. At about 6:50 am the RF On/Off tool was used to turn off RF in the Injector and North Linac, after which pressure spiked. After vacuum stabilized it seems to have settled just at the setpoint for the turbo pump to turn on, causing it to turn on repeatedly. This was noticed and the pump was set to local mode and the pressure continued climbing very slowly for the next 1.5 hours until the event at 8:40.

janak

Shift Information

Shift Day
CEBAF Program
MCC Crew Chief Blackshaw
MCC Operators Thomas
Program Deputy Mock
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