Recent Log Entries

HA 150 uA on Ca-48 Target (Requested FFB Totally Off)

Log Number: 3787582Logbook(s): Entry Makers: bcadeBody: 

HA is at 150 uA.
Feed Forward is still non-functional.
The Hall requested that FFB be turned totally off (i.e. Sys OFF, RF OFF, BPMs in Normal Mode).
'SEE Norm Ops' is visible indicating BPMs are in normal mode.

Follow-up Re: FeedForward being off is the problem with modulating Energy Vernier SL20

Log Number: 3787575Logbook(s): Entry Makers: vowenBody: 

There is Hall A FFB system and Hall A Energy Modulation System both of which have a RF part that feeds SL20 Vernier inputs to all 8 cavities. Hall A FFB system always, always, always has priority over Hall A Energy Modulation System Electrically. Hall A Energy Modulation Systems RF Vernier will have no effect if Hall A FFB System is on. If you want Hall A Energy Modulation Systems RF vernier output to have a effect on SL20 RF cavities 1 thru 8, Hall A FFB System has to be off (That is the way the systems are designed).

HA Ca-48 20 uA CW

Log Number: 3787573Logbook(s): Entry Makers: bcadeBody: 

HA is receiving 20 uA CW on Ca-48.
Will eventually ramp them up to 150 uA
Ion chambers were set from the values given to us by the hall (for 150 uA).
Trying to re-confabulate HA FFB.

VBV1L05B closed

Log Number: 3787559Logbook(s): Entry Makers: lrichardBody: 

Fig 1 shows valves closed and requests given.
Fig. 2 shows how long VBV1L05 took to recover.

HA Back at 150 uA

Log Number: 3787536Logbook(s): Entry Makers: bcadeBody: 

HA is back at 150 uA. FFB is on (i.e. Sys ON & RF ON).

CMTF LCLS-II J06 Cooldown Update

Log Number: 3787535Logbook(s): Body: 

CPV11CD: 46.33%

GHRPAVE: 119.2K
GHRPDELTA: 22K
GHRPRATE: 4.35 K/hr

CM Pressure: 1.06 atm
Insulating Vac: 1.43e-06 torr
Waveguide Vac: 2.10e-09 torr
Beamline Vac: 8.30e-11 torr

The original shield cooldown valve configuration helped increase the cooldown rate and get back on track.

Operator SIGN IN

Log Number: 3787510Logbook(s): Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Carlino
DATE:             02/19/2020
SHIFT:               Swing

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

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