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.
** CST: Does thermal energy affect collection efficiency?
 
 
* 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)
  • 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