Aggregator
INJECTOR=>APERTURE=>IFY0IA1=>VRD0IA1AbsPosR (A1 POSITION) has been enabled in alarm handler
COMMENT ON Test beam envelope management around Wiens with strong spin flipper
We seem to have established a reasonably quick process by which the optimal settings for focusing into the VWien and HWien can be found. Today's test showed the values for the compensated spin flipper are consistent between HWien set to 0, 60, and 90 degrees.
https://logbooks.jlab.org/entry/4470739
Steps for next time:
1. optimize again with uncompensated (flipping) spin flipper; also try combinations of VWien and HWien
2. transport high-current beam to FC1 with chopper on to demonstrate transmission
"BSY: Power Permit"
COMMENT ON Upgrade 2L03 to a C75 zone.
"North Linac: Power Permit"
COMMENT ON Viewer SAM Maintenance
COMMENT ON Viewer SAM Maintenance
INJECTOR=>LASER=>LASER_TABLE=>psub_cx_pos (CATHODE X POSITION) has been disabled in alarm handler
INJECTOR=>LASER=>LASER_TABLE=>psub_cy_pos (CATHODE Y POSITION) has been disabled in alarm handler
Leave NL06 OFF for the Weekend
"SL Access Door LED not illuminating"
BSList #117047: HWien focusing at 0/90 degrees
Retracted A1.
Tested HWien = +90 degrees, works fine now that the limit has been removed.
Repeating MFG1I04 scan from #4468893, this time comparing HWien = 0 and HWien = 90 degrees. MFG1I04A = -MFG1I04B.
Figure 1: beam sizes on 0I02 viewer
Figure 2: relative deviation between the two HWien settings as defined previously. The minimum is now at 129 or 130 as opposed to 127 or 128 for HWien=60. The difference is probably small enough to ignore. Going forward, 130 may be a good choice.
Allsave #26645.
Pausing study to come back to QE scans to investigate shift in laser position.
Autolog save
RF Probe Cables for 1L05 &1L10
SLinac/FEL SC1R Pumpdown Complete
DecaRads moved to 1L05, 1L10, 1L23
COMMENT ON Post SAM FE onset measurements C75 and C100 cryomodules
Moved DecaRad system from 1L07 to 1L05 to support post-plasma checks.
1L05 Readbacks via SRF DecaRad nl05b
__Drad Ch.__ /__Location__
DRADN05BSRF1 1L05 WG 1&2
DRADN05BSRF2 n/c
DRADN05BSRF3 1L05 WG 3&4
DRADN05BSRF4 n/c
DRADN05BSRF5 1L05 top cl
DRADN05BSRF6 1L05 WG 5&6
DRADN05BSRF7 1L05 WG 7&8
DRADN05BSRF8 n/c
DRADN05BSRF9 1L05 Supply (US) BL
DRADN05BSRF10 1L05 Return (DS) BL
DRADN05BHVMON
All 7 chs. were good ~11:00 on 13Feb2026. HV bias is off.
***** ******
Moved DecaRad system from 1L09 to 1L10 to support post-plasma checks.










