Recent Log Entries

Log Number: 3876935Logbook(s): 

• ELOG

Body: 

Late Entry:Wiring and continuity checks complete for rack IN02B10. Resistance and inductive measurements begin today along with power up.

Log Number: 3876933Logbook(s): 

• POLOG
• ELOG

Entry Makers: chgarciaBody: 

The Vertical Wien filter HV was ramped up yesterday to 20.5 kV (Digital voltage readout is 1.5 % lower than set point. For 100 deg spin rotation at 200 keV the required voltage per plate is ~20.2 kV ) and was left soaking overnight. There were no vacuum spikes during the soak and the voltage did not trip off.

I have ramped the HV down to 0 V in preparation for Horizontal Wien filter HV evaluation.

Log Number: 3876929Logbook(s): 

• ELOG

Body: 

Fabrication work completed, attached pictures of finished pieces
assembled and ready for installation.

Log Number: 3876923Logbook(s): 

• ELOG
• LLRFLOG

Body: 

Continue LLRF 3.0 final testing and calibration
On attached picture Evonda Valentine during Field Control module inspection.

Log Number: 3876922Logbook(s): 

• ELOG

Tags: 

• Readme

Entry Makers: moserBody: 

Verified cannot be retracted via EPICS.

Log Number: 3876921Logbook(s): 

• POLOG
• ELOG

Body: 

Day #159, Week 32 Day 4, Wrap-Up:

AIPINJ --
* TOSP and THA for beam operations in Injector without
NL PSS certification complete released -- must read for
Injector beam commissioning shift-takers and those
involved with upcoming CEBAF PSS Certification.
3876899
* PCup, FC1, and FC2 ItoV HCO completed. 3876865
* 500keV Dump picoammeter HCO completed, completing
Injector picoammeter system HCO. 3876873
* Beam sync verified at InjSB ItoV chassis. Beam Sync
and 30Hz sync signals verified on MCC scope. No issues.

Log Number: 3876918Logbook(s): 

• ELOG

Entry Makers: moserBody: 

Made some progress on PSS certs, but not quite as much as planned. Certified MBO0I06. Unable to certify PSS laser shutters and macropulse chassis. See linked log entry re: why.

Powered down trim rack IN02B11, as requested by DC Power.

Log Number: 3876913Logbook(s): 

• POLOG
• ELOG
• RFLOG

Entry Makers: gramesBody: 

Shukui and I were very excited to measure photocathode QE in Gun2.

We're using laser bypass key (see fig. 1) but TMG shutters won't open....seems like 18V maybe not getting there? b/c none of the lasers will pass light. On the other hand, the PSS shutters go green, that's a good thing.

Anyway, no light to the photocathode means no QE scan yet, no PSS laser shutter test, etc.

TS'ing under way!

Log Number: 3876912Logbook(s): 

• ELOG
• RFLOG

Entry Makers: gramesBody: 

Gun valve solenoid would not close gun valve today, so I hard-wired air line directly to valve, closed fine.

Air blows strong through solenoid exhaust, rather than into valve mechanism.

Same old style valve.
Same air pressure (right?!?)

On Phil's punchlist for Friday...and then maybe a QE scan, so maybe window for NEG activations has passed, photocathode in the gun, maybe making beam on Monday, checking QE issues, etc, blah blah.

Log Number: 3876907Logbook(s): 

• ELOG

Body: 

VIP4S00A Appendage IP is On and Pumping; Turbo Pump Cart is
disconnected from VRV4S00A.

Log Number: 3876905Logbook(s): 

• ELOG

Body: 

Task approved by work supervisor.

Log Number: 3876902Logbook(s): 

• POLOG
• ELOG

Entry Makers: chgarciaBody: 

Vacuum in the 1L injector beam line was monitored while the Vertical Wien filter voltage was ramped simulatenously for the Pos and the Neg power supplies. First in the Positive Wien angle configuration, then in the Negative Wien angle configuration.

Figure 1 shows the vacuum response of the ion pumps shown in Figure 2 to high voltage.
In the positive Wien angle configuration, the voltage was ramped in 1 kV stpes about every 2-3 minutes. At 11 kV a vacuum spiked occurred. At 19.5 kV, the HV enable permit was lost in both Pos and Neg power supplies.

Log Number: 3876900Logbook(s): 

• ELOG

Body: 

Lee Broeker and I completed the Interlock Check Procedure of the
ARC2, 4, 6 and 8 box supplies. Max Roy and Onish Kumar joined us for
the checks of ARC 6 and 8 supplies.

Log Number: 3876899Logbook(s): 

• ELOG

Body: 

The purpose of the attached TOSP (ACC-21-115759-TOSP) is to define the controls, procedure and responsibilities
for safely running beam to the 500 keV region of the injector without the possibility of sending beyond that point
before and interleaved with the weeks-long process of PSS certification.

Those who stand shift (OPS, CIS, CASA) to run beam and SSG staff who carry out the PSS Certs must read,
understand and sign the TOSP which will be posted in the MCC.

Log Number: 3876897Logbook(s): 

• ELOG

Entry Makers: moserBody: 

Later today, the Injector will be swept and locked up for PSS certifications. Lock-up will occur after 430p, allowing work in the tunnel wrap-up for the afternoon.

Thank you DC Power for enabling operation of MBO0I06 for another night, mid-HCO.

Log Number: 3876895Logbook(s): 

• ELOG

Body: 

Restarted 7A Ion pumps and monitoring.

Added scroll pump and gauge cluster at 1L19.

Log Number: 3876894Logbook(s): 

• ELOG

Body: 

The DP Station at 2L01 was showing correct signal. No issues
found after troubleshooting.

Log Number: 3876892Logbook(s): 

• ELOG

Body: 

Wiring of the IDL "Inserted" signal into FSD has been corrected.

Log Number: 3876891Logbook(s): 

• BDLOG
• ELOG

Body: 

IHA0I02 - stepper motor replaced, stepper motor control module replaced, linear pot replaced, preamp amplifier replaced, reterminated the control cables and read back cables, cycled harp and verified the stepper motor and limit switch read backs are operational (*ITV0I02 control voltage is disabled), still need to test the anti-collision circuit that prevents the viewer from inserting while the harp is "IN"

*Need to speak with Joe and Phil about interlocking the harp with the viewer (i.e.

Log Number: 3876890Logbook(s): 

• BDLOG
• ELOG

Body: 

PWF1I04 - used an separate cable to run the HV interlock for the vertical Wien bottom, reterminated both inter lock cables, reconfigured the pin-out on the interlock boxes on the cable tray, verified the power supply interlock "opens" when the field cables are disconnected.

PWF1I06 - used a new cable to run both interlocks for the left and right HV field cables, terminated cables and reconfigured the pin-out on the interlock boxes located on the cable tray, replaced the 24V relay inside the switcher chassis for the negative side power supply, verified the power supply interlock "opens" when t