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MJA9A09 Status
MJA9A09 tripped twice on magnet overtemp during BoxPS HCO earlier today.
One supply and return LCW valves feed this dipole and the "lower" (i..e in pass #, not physical vertical placement) pass dipoles directly above it, and these valves were fully open. There were no issues during BoxPS HCO on the "lower" pass dipoles.
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QuickPic - North Linac Partial Escort survey
NL17 pulling some Arc Faults
COMMENT ON Q0 Measurements via Flow Meter on Zone 2L25
2L25 JT valve is opening while other valves remain closed
I haven't touched the JT valve for awhile now. Last thing I did was put the sample time setpoint back to it's original 30 (was previously 10 during my measurements). It was within minutes after the CHL trip that I restored the sample time setpoint
perhaps this is due to the ~20W heater readback on 2L25, which I believe is unintended as the other modules heaters are all at 0W
Cryo may be opening the valve on their end and I just can't 'see' it, similar to how they are controlling the valves regardless of what the Ops JT Valve Screen says or Ops PV 'claims' it to be...
2L25 heater readback stuck at 20W
I was working with 2L25 heater when the cold box tripped. I assume the heater readback is stuck due to the configuration I had it in when the CHL auto system took charge. Because I do not fully understand CHL's systems or Auto responses, I am going to leave it as is.
2L25 JT valve is in a similar situation. However, with 2L25 JT at 29% I can assure it is closed (as I believe is indented)
CHL south linac cold box trip - 2L25 Flow Meter plan --> backed out
SL RF tripped due to 2K Cold Box SC1R
Intermittent CHL Power alarms
BCM '0L02 Sensitivity Test
PM
Another opportunity to optimize the low-end performance of the '0L02 BCM (DR-based).
Figure 1: '0L02 settings prior to test
Figure 2: Response to 2nA + 8nA then 2nA:
Pre Gain 1 = 30
Pre Gain 2 = 50
Mag Div by 2^n = 0
K(IQ) = 3
K(mag fil) = 8
Figure 3: No beam with Booster off then on, resulting in 10dB of SNR reduction (factor of 3).
ATLis Comments Daily Digest
RF On/Off turned RF On
Box Supplies Were Cycled
The following box supplies were CYCLED 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 = 8.784 A/s
ARC4A Ramp Rate = 10.118 A/s
ARC6A Ramp Rate = 9.299 A/s
ARC7A Ramp Rate = 9.277 A/s
ARC8A Ramp Rate = 11.432 A/s
ARCAA Ramp Rate = 11.712 A/s
LAM1C Ramp Rate = 8.295 A/s
LAM3C Ramp Rate = 11.498 A/s
RSEP8A Ramp Rate = 10.544 A/s
RSEP9A Ramp Rate = 4.188 A/s
XSEP2T Ramp Rate = 5.814 A/s
XSEP4T Ramp Rate = 5.193 A/s
XSEP6T Ramp Rate = 9.123 A/s
XSEP8T Ramp Rate = 16.057 A/s
XSEPAT Ramp Rate = 16.234 A/s
Box Supplies Were Turned on at Setpoint 1
The following box supplies were TURNED ON AT SET POINT 1 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 = 8.784 A/s
ARC4A Ramp Rate = 10.118 A/s
ARC6A Ramp Rate = 8.810 A/s
ARC7A Ramp Rate = 9.277 A/s
ARC8A Ramp Rate = 11.432 A/s
ARCAA Ramp Rate = 10.811 A/s
DOG1E Ramp Rate = 3.430 A/s
DOG2E Ramp Rate N/A
DOG3E Ramp Rate N/A
DOG4E Ramp Rate N/A
DOG5E Ramp Rate N/A
DOG6E Ramp Rate N/A
DOG7E Ramp Rate N/A
DOG8E Ramp Rate N/A
DOG9E Ramp Rate N/A
LAM1C Ramp Rate = 6.221 A/s
LAM3C Ramp Rate = 10.06
COMMENT ON DC Power Machine High Energy Re-configuration
Slowly brought up ARC1, ARC3, ARC5, ARC7, ARC9, and RSEP9 to 12Gev setpoints. We monitored their readbacks and associated shunt modules. We have issues with the ARC5 shunt MXD5R01 not responding to setpoint and driving the maximum current. This module will most likely need to be swapped. We are also having a communication dropout at the end of the NL with IOCNL3MAG for shunts in that area. We will opportunistically swap the IP pack for the shunts on that pack. We also ran into a magnet overtemp on ARC9 MJA909.
-O'Brien, Banks










