Difference between revisions of "UITF Notes"
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== keV beam time == | == keV beam time == | ||
* LVQE scan at different voltages. Expect same result, provided different laser powers at same voltage give same result (avoid SCL). | * LVQE scan at different voltages. Expect same result, provided different laser powers at same voltage give same result (avoid SCL). | ||
| + | ** Results are different, don't know if related to instrumentation (battery resistance etc.) or physics. If it's physics: | ||
| + | *** CST: Does thermal energy affect collection efficiency? | ||
| + | *** Ion current? probably too low to matter | ||
| + | *** Try adjustable bias voltage source (Keithley) | ||
* HVQE scan at different voltages. Expect different result. | * HVQE scan at different voltages. Expect different result. | ||
| − | |||
* High current to FC2 for 12+ hours, check if drift is gone | * High current to FC2 for 12+ hours, check if drift is gone | ||
* Look at [https://logbooks.jlab.org/entry/4022870 mains-harmonic BPM signals] as a function of parameters (buncher etc.) | * Look at [https://logbooks.jlab.org/entry/4022870 mains-harmonic BPM signals] as a function of parameters (buncher etc.) | ||
Revision as of 08:46, 19 August 2022
MeV beam time
- Measure MeV dispersion with BPMs => Done, need to analyze
- TM beam to 703 to see RF drift (full shift)
- Verify optics setup for HKDL
- Repeat buncher study, booster crested, 8 MeV, multiple scans per point
keV beam time
- LVQE scan at different voltages. Expect same result, provided different laser powers at same voltage give same result (avoid SCL).
- Results are different, don't know if related to instrumentation (battery resistance etc.) or physics. If it's physics:
- CST: Does thermal energy affect collection efficiency?
- Ion current? probably too low to matter
- Try adjustable bias voltage source (Keithley)
- Results are different, don't know if related to instrumentation (battery resistance etc.) or physics. If it's physics:
- HVQE scan at different voltages. Expect different result.
- High current to FC2 for 12+ hours, check if drift is gone
- Look at mains-harmonic BPM signals as a function of parameters (buncher etc.)
Beam line modifications
- Put HKDL stuff into the machine ahead of time!
- Fix miswired MeV correctors