Difference between revisions of "Outline For Thesis"
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== Abstract, Intro (obviously) == | == Abstract, Intro (obviously) == | ||
| + | |||
| + | *Current experiments requiring the use of GaAs photo-guns - polarized electron beams | ||
| + | *What is a photo-gun? | ||
| + | *Description of the problem - ionization & why is it bad for electron beam production & electron guns? | ||
| + | **Ion Back-Bombardment & QE degradation of the photocathode | ||
| + | ***How/where are ions formed in the photogun? | ||
| + | ***How many ions reach the photocathode and what are their energies? | ||
| + | ***How many of these ions contribute/correlate to QE damage? | ||
| + | **Ion Mitigation Techniques | ||
| + | ***What experimental techniques are currently available? - Clearing electrodes (biased anode), other ion tracking codes (IBSimu, SIMION, etc.) | ||
| + | **Theoretical/Computational techniques | ||
| + | |||
| + | |||
| + | *Literature review | ||
== Ionization Simulations with GPT Custom Element == | == Ionization Simulations with GPT Custom Element == | ||
Revision as of 09:28, 22 May 2020
Abstract, Intro (obviously)
- Current experiments requiring the use of GaAs photo-guns - polarized electron beams
- What is a photo-gun?
- Description of the problem - ionization & why is it bad for electron beam production & electron guns?
- Ion Back-Bombardment & QE degradation of the photocathode
- How/where are ions formed in the photogun?
- How many ions reach the photocathode and what are their energies?
- How many of these ions contribute/correlate to QE damage?
- Ion Mitigation Techniques
- What experimental techniques are currently available? - Clearing electrodes (biased anode), other ion tracking codes (IBSimu, SIMION, etc.)
- Theoretical/Computational techniques
- Ion Back-Bombardment & QE degradation of the photocathode
- Literature review
Ionization Simulations with GPT Custom Element
GPT Description
Ionization Theory
- Can be pulled from PSTP proceedings and tech notes. Will include:
- Ionization Cross Section & Production Rate
- Secondary Electron Differential Cross Section (SEDCS)
- Ion Energy Distribution (Maxwellian)
- Momentum/Energy Conservation?
GPT Custom Element Algorithm
- Description of how the custom element works and is used to simulate ionization
- Benchmarking with theory and IBSimu (Can be pulled from future GPT/IBSimu paper)...maybe put in the LIfeSize Runs Section?
Biased Anode To Mitigate Ion Back-Bombardment
- Ion back-bombardment theory & how the biased anode will mitigate it (Can be pulled from PSTP)
- Summer 2019 Biased Anode Experiments
- Experiments at CEBAF
- QE Measurements & Charge Lifetime Analysis
- QE Scan Analysis
- GPT Simulations (w/custom element)
- Results/Discussion
- Similar for Winter 2019-2020 Experiments?
Analyzing 2017 LifeSize Runs with GPT/IBSimu
- Description of Experiment
- Analysis of results with GPT custom element
- Comparison & benchmarking with IBSimu
Ion Trapping at the Gun Test Stand (GTS)
- Theory
- Ion Trapping Experiments - Ghost Beam and Steel Shield
- GPT Simulations (w/custom element)
- Results/Discussion