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Differences between UVA RTP HV Driver and JLab RTP HV Driver

14 hours 56 minutes ago
Log Number: 4469506Logbook(s): Entry Makers: suleimanBody: 

While checking signals from the UVA RTP HV Driver and JLab Driver, we identified these differences:

1. The two drivers are out of phase with the helicity signal - see first linked entry.

2. For the UVA Driver, the cables connected to crystal 2 were swapped - see second linked entry.

With the JLab Driver, the PITA slope was measured to be +0.318 ppm/count (IHWP=OUT). The slope measured with the old driver was +0.621 ppm/count (IHWP=IN)- see third linked entry. The factor of two is due to the fact that the new driver uses 10 VDAC while the old driver uses 5 VDAC.

suleiman

SLinac U-Tubes Complete

15 hours 18 minutes ago
Log Number: 4469493Logbook(s): Entry Makers: johnwBody: 

U-Tubes are complete for 2L24 and 2L26. Both modules have been released to SRF for cooldown; 2L26 was released around 20mins ago with 2L24 planned to start about an hour after 26. We encountered no issues with U-Tube installation.

cryo

SC2 Pumpdown Complete

16 hours 22 minutes ago
Log Number: 4469479Logbook(s): Entry Makers: wisslerthilanBody: 

Pumpdown of SC2 complete. NLinac is at 0.0392 atm, 185 g/s.

A rise in return temperature was seen towards the latter part of the pumpdown, but the program was able to handle it and finish the pumpdown.

cryo

TMG Check script failing due to deselected laser

16 hours 31 minutes ago
Log Number: 4469478Logbook(s): Entry Makers: deirBody: 

Hall C laser is currently deselected in Boom Buddy and it seems the TMG check script is failing because it can not turn on that laser.

Fig 2: Shows a some of the PV's that boom buddy uses that the script writer could implement in the script to determine which lasers are in use.

deir

Gun HV forced OFF by PSS

16 hours 40 minutes ago
Log Number: 4469477Logbook(s): Entry Makers: chgarciaBody: 

At 7:37 this morning, both PSS A and B lost permit, forcing the gun HV OFF. VWien was off at the time, HWien HV was at +/- 2kV with magnet BDL at 43 G-cm. (Figure 3).

chgarcia

Operator SIGN IN

17 hours 6 minutes ago
Log Number: 4469472Logbook(s): Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Thomas
DATE:             02/10/2026
SHIFT:               Day

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

Shift Information

Shift Owl
CEBAF Program
MCC Crew Chief Deir
MCC Operators Smith
Program Deputy Mock
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Recent PSS History

recent pss history graph