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| | =Annual review-May 2020= | | =Annual review-May 2020= |
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| − | =Thesis Outline=
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| − | ==Introduction==
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| − | * ''Magnetized electron beam''
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| − | * ''Applications of the magnetized electron beam''
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| − | ** ''Magnetized electron cooling''
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| − | * ''Jefferson Lab magnetized electron source for the JLEIC cooler''
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| − | ==Generation of the magnetized electron beam==
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| − | *''Experimental setup (DC HV gun, photocathode, cathode solenoid, RF laser, focusing solenoids, etc.)''
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| − | *''Beam diagnostics''
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| − | ==Beam dynamics==
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| − | *''Beam matrix''
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| − | *''Phase space''
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| − | *''Emittance (thermal, phase space, geometric)''
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| − | *''Effective(drift) emittance (emittance of the magnetized beam)''
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| − | *''Measuring the beam emittance''
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| − | ==Space charge effect==
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| − | *''Space charge effect in the magnetized beam''
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| − | ==Simulations on the magnetized electron beam==
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| − | *''ASTRA''
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| − | **''Initial particle distribution''
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| − | **''Field maps (3D E field map, 2D B field map)''
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| − | **''Space charge calculation mechanism''
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| − | **''Emittance''
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| − | *''GPT''
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| − | **''Initial particle distribution (Laser*QE image processing)''
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| − | **''Field maps (3D E field map, 2D B field map)''
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| − | **''Space charge calculation mechanism''
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| − | **''Emittance''
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| − | *''Post-processing (MATLAB)''
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| − | ==Characterization of the magnetized beam==
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| − | *''Experimental method''
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| − | **''Beam size vs solenoid I''
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| − | **''Rotation angle vs solenoid I''
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| − | **''Emittance vs solenoid I - two different laser sizes''
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| − | **''Emittance vs laser spot sizes - max solenoid current''
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| − | *''ASTRA/GPT simulations (Simulation of all the above variations)''
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| − | *''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==
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| − | *''Experimental methods''
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| − | **''Pulse energy vs extracted charge -for different magnetizations''
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| − | **''Space charge current limitation dependence on gun high voltage - for different magnetizations''
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| − | **''Space charge current limitation dependence on pulse width- for different magnetizations''
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| − | **''Space charge current limitation dependence on laser spot size- for different magnetizations''
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| − | *''GPT simulations''
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| − | *''Conclusions (Comparison -measurements and simulations)''
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| − | ==Redesigning and performance of the photogun==
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| − | *''Gun designing''
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| − | **''CST electrostatic design''
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| − | **''GPT simulations implementing the new gun field map''
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| − | *''Polishing and gun assembly''
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| − | *''High voltage conditioning''
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| − | ==Repeated experimental and numerical simulations results of the space charge dominated magnetized beam with the new photogun ==
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| − | ==Conclusions==
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| | [[Sajini Wijethunga | Return to Sajini Wijethunga]] | | [[Sajini Wijethunga | Return to Sajini Wijethunga]] |
