Difference between revisions of "Outline For Thesis"

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Outline for Thesis
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== Abstract, Intro (obviously) ==
  
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*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?
  
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*Literature review
  
 +
== Ionization Simulations with GPT Custom Element ==
  
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===GPT Description ===
  
  
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=== Ionization Theory ===
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* Can be pulled from PSTP proceedings and tech notes. Will include:
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**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) ==
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*Theory
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*Ion Trapping Experiments - Ghost Beam and Steel Shield
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*GPT Simulations (w/custom element)
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*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
    • 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


Go to To-Do List

Return to Home Page