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Hall D current stabilized by adjusting slit 25 --> 30

1 day 9 hours ago
Log Number: 4506115Logbook(s): Entry Makers: dchriBody: 

Came in to xD current excursions ranging from ~22 to ~60 nA while trying to send 35nA
At this time, attenuator was between ~125 to ~117
And xD slit was at ~25

Noticed that xD current had been much more stable when xD slit was set to 32 (earlier in the day)

Setting xD slit from ~25 to ~30 reduced xD current excursions from +/-38 to +/-15

We will continue to monitor and at some point likely try to set xD slit back to 32 to see if excursions can be reduced more

dchri

Operator SIGN IN

1 day 9 hours ago
Log Number: 4506102Logbook(s): Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Christian
DATE:             05/29/2026
SHIFT:               Swing

The operator has read the following:
dchri

Operator SIGN IN

1 day 9 hours ago
Log Number: 4506101Logbook(s): Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Schaumloffel
DATE:             05/29/2026
SHIFT:               Swing

The operator has read the following:
bschauml

Operator SIGN IN

1 day 9 hours ago
Log Number: 4506100Logbook(s): Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Yoon
DATE:             05/29/2026
SHIFT:               Swing

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

BLA system showing loss

1 day 9 hours ago
Log Number: 4506098Logbook(s): Entry Makers: beneschBody: 

Figure 1 - upper panel has all three halls. Hall D current very noisy.
Figure 2 - upper panel has just Hall C.
Figure 3 - loss with C at 60 uA was lower around 5/26

benesch

Decreased IIX5S01 rates

1 day 10 hours ago
Log Number: 4506090Logbook(s): Entry Makers: lrichardBody: 

Figs 1, 3 Show quantitatively using MBC4R10V to decrease IIX5S01 rates.
Fig. 2 Show IIX5S01 rates decreased from 2759 to less than 10.

lrichard

CREW CHIEF SIGN IN

1 day 10 hours ago
Log Number: 4506088Logbook(s): Body: 
THOMAS JEFFERSON NATIONAL ACCELERATOR FACILITY
ACCELERATOR OPERATIONS CREW CHIEF SIGN IN FORM

Date : 05-29-26
Time : 15:38:31
Day : Friday
Shift : Swing

Crew Chief : Richardson
Program Deputy: Saitiniyazi
Team : X
Arm : Schaumloffel
Designated SSO: Yoon
LERF Operator:
Operators : Christian, Schaumloffel, Yoon

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

IIX5S01 railed

1 day 10 hours ago
Log Number: 4506081Logbook(s): Entry Makers: beneschBody: 

See top window of Figure 1. Integration time will have to be reduced from one second to get an accurate reading, top center of Figure 2. I don't know how to do that; the capacitor can be changed to 10 pF from this screen.

benesch

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MCC Operators Samari, Shriner
Program Deputy Saitiniyazi
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