# Thesis outline

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## Introduction

** *Magnetized electron beam

*Applications of the magnetized electron beam**Magnetized electron cooling*

*Jefferson Lab magnetized electron source for the JLEIC cooler''*

## Generation of the magnetized electron beam

*Experimental setup (DC HV gun, photocathode, cathode solenoid, RF laser, focusing solenoids, etc.)**Beam diagnostics*

## Beam dynamics

*Beam matrix**Phase space**Emittance (thermal, phase space, geometric)**Effective(drift) emittance (emittance of the magnetized beam)**Measuring the beam emittance*

## Space charge effect

*Space charge effect in the magnetized beam*

## Simulations on the magnetized electron beam

*ASTRA**Initial particle distribution**Field maps (3D E field map, 2D B field map)**Space charge calculation mechanism**Emittance*

*GPT**Initial particle distribution (Laser*QE image processing)**Field maps (3D E field map, 2D B field map)**Space charge calculation mechanism**Emittance*

*Post-processing (MATLAB)*

## Characterization of the magnetized beam

*Experimental method**Beam size vs solenoid I**Rotation angle vs solenoid I**Emittance vs solenoid I - two different laser sizes**Emittance vs laser spot sizes - max solenoid current*

*ASTRA/GPT simulations (Simulation of all the above variations)**Conclusions (comparisons -measurements vs simulations, mismatch oscillations, negative rotation angles, etc.)*

## Experiments and numerical simulations of the space charge dominated magnetized beam

*Experimental methods**Pulse energy vs extracted charge -for different magnetizations**Space charge current limitation dependence on gun high voltage - for different magnetizations**Space charge current limitation dependence on pulse width- for different magnetizations**Space charge current limitation dependence on laser spot size- for different magnetizations*

*GPT simulations**Conclusions (Comparison -measurements and simulations)*

## Redesigning and performance of the photogun

*Gun designing**CST electrostatic design**GPT simulations implementing the new gun field map*

*Polishing and gun assembly**High voltage conditioning*