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- Takashi described the HPS-specific applications requiring stepper motor control.
- Target (new stage)
- 2 foils and out position. May increase the number of foils to 5.
- 2 limit switches, low precisions, ~100um, always use reset with limit switch on power loss
- May need to put a wire on the stick for a harp scan after first chicane
- Collimator (new stage)
- 2 collimators and out position. May increase to 4.
- adjustable 50um, need to monitor some rates to find optimal position. Can implement a scan also,
- adjustment will need to be redone every time the collimator is retracted.
- Hovanes wanted to have specs of the stage (uni- and bi-directional reproducibility, accuracy, smallest increment)
- SVT motion (2 new stages)
- SVT scan (same stages as SVT motion)
- There are other motor applications as well: 2C21, 2C24, 2CH00, beam blocker. Total 8 motors for HPS: 2 on space frame, 6 near beam dump alcove.
- Krister and Stepan discussed the magnet power supply controls
- We will need the power supplies for: Moeller quads, Tagger magnet, minitorus, Pair spectrometer.
- Krister pointed out that a lot of controls cabling, including magnet power supplies have been taken apart. Can be a major problem.
- It might be easier to create new controls for some of them rather than to try to recreate what was there before.
- Stepan and Krister will go into the hall to see what is still there.
- No update on ECAL HV/LV, the motherboards is still being finalized.
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