Difference between revisions of "Outline For Thesis"
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− | + | == 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 | ||
+ | **CEBAF Injector - What is it? How do we (currently) model it? | ||
+ | *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 | ||
+ | |||
+ | |||
+ | [[To-Do List For Thesis | Go to To-Do List]] | ||
[[Josh Yoskowitz | Return to Home Page]] | [[Josh Yoskowitz | Return to Home Page]] |
Revision as of 10:36, 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
- CEBAF Injector - What is it? How do we (currently) model it?
- 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