Aggregator

Log Number: 4474781Logbook(s): 

• ELOG

Body: 

Approved

Log Number: 4474780Logbook(s): 

• ELOG

Body: 

MBC7S00H Ch 30 is Single channel locked out.
NL27B20 rack has had power restored in case any other magnets in the Trim rack are needed

- Kissinger, Banks, Crespo, Delk

Log Number: 4474779Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
Zone 1L21
Username: kerns
Date/Time: 03-06-26_14:00:35
RF Status: Good
Comment: Zone dropping back from HV might be dirty HV relay used by PSS. Three attempts today and got zone into HV.
Special Instructions:

Maintenance Tag: Component: CPS Components

Log Number: 4474778Logbook(s): 

• POLOG
• ELOG

Entry Makers: suleimanBody: 

The puck is left on the heater in the prep chamber.

Log Number: 4474777Logbook(s): 

• ELOG

Entry Makers: banksBody: 

I raised the current limits on both supplies. Both were set to 250 amps.

Log Number: 4474776Logbook(s): 

• ELOG

Entry Makers: bbarkerBody: 

These two IOCs continue to drop and restore themselves causing alarms. Attempted reaching out to ACS for guidance, but no response.

Log Number: 4474773Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: 

The following box supplies were TURNED ON AND CYCLED ONCE by version 2-16 of the Box Supply Cycling Script:
ARC1A Ramp Rate = 7.400 A/s
ARC2A Ramp Rate = 6.712 A/s
ARC3A Ramp Rate = 2.329 A/s
ARC4A Ramp Rate = 10.144 A/s
ARC5A Ramp Rate = 9.307 A/s
ARC6A Ramp Rate = 9.326 A/s
ARC8A Ramp Rate = 11.455 A/s
ARC9A Ramp Rate = 8.864 A/s
ARCAA Ramp Rate = 11.756 A/s
RSEP8A Ramp Rate = 10.544 A/s
RSEP9A Ramp Rate = 4.774 A/s

Log Number: 4474772Logbook(s): 

• ELOG

Body: 

This task is complete

Log Number: 4474771Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: RF was turned on in:
R14
R15
R17
R18
R19
R1B
R1D
R1E
R1F
R1G
R1H
R1P
R1O
R1N
R1M
R1K
R1J
R1I
R1Q

Log Number: 4474770Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: 

The following box supplies were TURNED ON AND CYCLED ONCE by version 2-16 of the Box Supply Cycling Script:
ARC1A Ramp Rate = 7.400 A/s
ARC2A Ramp Rate = 6.712 A/s
ARC3A Ramp Rate = 9.294 A/s
ARC4A Ramp Rate = 10.144 A/s
ARC5A Ramp Rate = 9.307 A/s
ARC6A Ramp Rate = 9.326 A/s
ARC9A Ramp Rate = 9.356 A/s
ARCAA Ramp Rate = 11.756 A/s
RSEP8A Ramp Rate = 10.544 A/s
RSEP9A Ramp Rate = 4.865 A/s

Log Number: 4474768Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: High Voltage was turned on for:
R14
R15
R17
R18
R19
R1B
R1D
R1E
R1F
R1G
R1H
R1I
R1J
R1K
R1M
R1N
R1O
R1P
R1Q

Log Number: 4474769Logbook(s): 

• POLOG
• ELOG

Entry Makers: marcyBody: 

checked RGA in prep chamber. All looks fine.
opened prep valve, minor changes to rga trace as expected. Noble gasses a touch higher than with the prep valve closed.
Neither chamber showed any hint of a leak with helium leak checking (just spraying, no bags).

Closed valve. RGA off for puck movement, can turn back on easily if needed after HV cable investigation

Log Number: 4474767Logbook(s): 

• ELOG

Body: 

DC power locked out the ARC7 box supply and removed one lead from the box supply, along with the in question YBBS06 shunt module from its slot. We then performed a resistance measurement of the magnet string, expecting to get a resistance reading of 3.2Ohms as done during the PM of the supply. We instead got a measurement of 2.014M Ohms, leading us to believe that the magnet is reading as an open. We then went into the tunnel and disconnected the magnet from the string to isolate it and reperform the measurement to further prove this theory.

Log Number: 4474766Logbook(s): 

• ELOG

Body: 

The old version of the buffer cards in 2L15 have been replaced with the newest version. This resolved the no X rate issue on iocsl4 for now. Matt, Michael

Log Number: 4474765Logbook(s): 

• ELOG

Body: The following entry was removed from the Accelerator Bypassed-Interlocks Log (ABIL) Tag # 7509 Device: VBVAA03 Function: Beamline Valve Location: West Arc (W1) Purpose: Bypass Downstream Interlock to valve from VIPAA04 Removed By: <a href='mailto:moser@jla

Log Number: 4474764Logbook(s): 

• POLOG
• ELOG

Body: 

All alarms have been implemented and have been added to the alarm handler.
Injector alarm handler restarted

Log Number: 4474762Logbook(s): 

• POLOG
• ELOG

Entry Makers: gramescovertBody: 

There are 6 hardware interlocks than can fault the gun HVPS off via the HVPS interface chassis. Here is a summary of our checks...

1. PSS A chain - unable to check, a clue would be the INJ drops out of state

2. PSS B chain - unable to check, a clue would be the INJ drops out of state

3. SF6 pressure ">50 psi" - we have EPICS readback of signal + rolling average; occassionally there is an EPIC value caught <~50 psi with HVPS staying on, so we should recheck the trip limit; Figs 1-3 show random sampling; Fig. 4 shows I think a lower value ~45 around time of a gun trip, e.g.

Log Number: 4474744Logbook(s): 

• POLOG
• ELOG

Entry Makers: marcyBody: 

Gun HV tripped last night. Checking ion pump behavior at the time.
Fig 1,2: The vacuum faults seem to have started first in the gun, then travelled downstream.

Figure 3 shows that, to the resolution of the epics time, the vacuum ok signal may have been the first to go bad triggering the valve to close then the gun voltage to drop.

Log Number: 4474742Logbook(s): 

• POLOG
• ELOG

Entry Makers: marcyBody: 

Gun ion pump has known field emission. We haven't hipotted to avoid affecting the high voltage electrode. We've been running it at 3400V.

Figures 1 & 2: Measured current vs voltage today for voltages from 3 kV to 4.8 kV.

Field emission onset clearly turns on after 4 kV. Slight change in current during soak at 4.8 kV, and recovering to a slightly better value than prior to this once dropped to 3200V after changes.

During October when we calibrated voltage for ion pumps, we intentionally didn't vary VIP2I00V much.

Log Number: 4474740Logbook(s): 

• ELOG

Body: 

electrometers swapped. Work complete.