Difference between revisions of "Thesis work"
From Ciswikidb
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# Introduction | # Introduction | ||
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* ''Magnetized electron beam'' | * ''Magnetized electron beam'' | ||
* ''Applications of the magnetized electron beam'' | * ''Applications of the magnetized electron beam'' | ||
− | + | ** ''Magnetized electron cooling'' | |
* ''Jefferson Lab magnetized electron source for the JLEIC cooler'' | * ''Jefferson Lab magnetized electron source for the JLEIC cooler'' | ||
# Generation of the magnetized electron beam | # Generation of the magnetized electron beam | ||
− | + | *''Experimental setup (DC HV gun, photocathode, cathode solenoid, RF laser, focusing solenoids, etc.)'' | |
− | + | *''Beam diagnostics'' | |
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− | + | # Beam dynamics | |
+ | *''Beam matrix'' | ||
+ | *''Phase space'' | ||
+ | *''Emittance (thermal, phase space, geometric)'' | ||
+ | *''Effective(drift) emittance (emittance of the magnetized beam)'' | ||
+ | *''Measuring the beam emittance'' | ||
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− | + | # 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)'' | |
− | Emittance | + | **''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.)'' | ||
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+ | # 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)'' | ||
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− | Gun designing | + | #Redesigning and performance of the photogun |
− | CST electrostatic design | + | *''Gun designing'' |
− | GPT simulations implementing the new gun field map | + | **''CST electrostatic design'' |
− | Polishing and gun assembly | + | **''GPT simulations implementing the new gun field map'' |
− | High voltage conditioning | + | *''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]] | [[Sajini Wijethunga | Return to Sajini Wijethunga]] |
Revision as of 00:59, 29 May 2020
Oral Qualifying Exam-March 2019
Annual review-May 2020
Thesis Outline
- 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
- Repeated experimental and numerical simulations results of the space charge dominated magnetized beam with the new photogun ==
- Conclusions