Difference between revisions of "Thesis work"

Latest revision as of 01:35, 29 May 2020

Return to Sajini Wijethunga

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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.)
-	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 ==
 [[Sajini Wijethunga | Return to Sajini Wijethunga]]

Difference between revisions of "Thesis work"

Latest revision as of 01:35, 29 May 2020

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