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COMMENT ON Harp Assembly Replacement - SAM 2025
APPROVED Replace gaskets on Insertable Dump in 3C line
COMMENT ON Site LCW Pump PMs
iocsoftsl05rf restored
COMMENT ON Inspect All ZA Main Supply & Return Hoses
Mag Shop:
ZA pre-flush flow checks:
MZA7R04
Aisle: 1080ml/min
Wall: 1100ml/min
MZA8S03
Aisle: 1130ml/min
Wall: 1020ml/min
MZAAS04
Aisle: 1000ml/min
Wall: 940ml/min
We have a handful of bad or very tight hoses that need to be replace. Will make them, install them prior to recircling the wagon for post-flush checks.
Delk-We are all on our way to get locks off lock box now.
Bern and I have discussed the need for extra flush time at 8S03 and AS04 with this very low flow values, he's got it covered tomorrow.
Tomorrow we will move to BSY then NL.
COMMENT ON Diagnose ion pump blips in chopper region
https://logbooks.jlab.org/entry/4456721
plan to begin varying voltages tomorrow or Thursday, depending on how reconnecting pol source ion pumps goes on Wednesday
chopper ion pump blips
chopper ion pump blips are no longer evident with beam and choppers off.
Fig 1 shows reduction in frequency when hall B current was dropped (less beam on hall B slit in chopper, July 3)
Fig 2 shows activity since beam off last week, fig 3 shows slightly longer time range on log scale, and adds when the choppers turned off. The activity appears to have ended with beam, not with chopper power.
Plan: measure I vs V for each pump using local front panel controls, and see if we can determine what the most likely cause of the blips is.