Revision as of 00:21, 29 May 2020

Oral Qualifying Exam-March 2019

Annual review-May 2020

Return to Sajini Wijethunga

@@ Line 2: / Line 2: @@
 =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==
 [[Sajini Wijethunga | Return to Sajini Wijethunga]]

Difference between revisions of "Thesis work"

Revision as of 00:21, 29 May 2020

Oral Qualifying Exam-March 2019

Annual review-May 2020

Navigation menu

Search