Difference between revisions of "Thesis work"

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=Oral Qualifying Exam-March 2019=
 
  
=Annual review-May 2020=
 
 
=Thesis Outline=
 
 
 
 
 
# Introduction
 
*"Magnetized electron beam"
 
*Applications of the magnetized electron beam
 
    *Electron cooling of ion beam
 
*Jefferson Lab magnetized electron beam for the JLEIC cooler
 
 
 
#Generation of the magnetized electron beam
 
##Experimental setup (DC HV gun, photo cathode, RF laser, solenoid, 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.)
 
 
 
7 Experiments a
 
== Headline text ==
 
nd 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) …
 
 
 
== Redesiging 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
 
 
 
 
== Repeated experimental and numerical simulations results of the space charge dominated magnetized beam with the new photogun ==
 
 
 
== Conclusions ==
 
  
  
 
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Latest revision as of 01:35, 29 May 2020


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