Μελέτη διάταξης φωτοεγχυτή για επιταχυντή υψηλής ενέργειας Ακτίνων-Χ Ελεύθερων Ηλεκτρονίων της Συνεργασίας CompactLight

Τελάλη, Ειρήνη; Telali, Eirini

dc.contributor.author	Τελάλη, Ειρήνη	el
dc.contributor.author	Telali, Eirini	en
dc.date.accessioned	2020-04-29T21:10:57Z
dc.date.available	2020-04-29T21:10:57Z
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/50311
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.18009
dc.rights	Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ελλάδα	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/gr/	*
dc.subject	Δυναμική δέσμης	el
dc.subject	Laser Ελεύθερων Ηλεκτρονίων	el
dc.subject	Γραμμικοί Επιταχυντές	el
dc.subject	Φωτοκάθοδος	el
dc.subject	Beam dynamics	en
dc.subject	Free Electron Laser	en
dc.subject	Linear accelerator	en
dc.subject	Photoinjector	en
dc.subject	Photocathode	en
dc.title	Μελέτη διάταξης φωτοεγχυτή για επιταχυντή υψηλής ενέργειας Ακτίνων-Χ Ελεύθερων Ηλεκτρονίων της Συνεργασίας CompactLight	el
dc.contributor.department	Εργαστήριο Πειραματικής Φυσικής Υψηλών Ενεργειών και Συναφούς Οργανολογίας	el
heal.type	bachelorThesis
heal.secondaryTitle	Photoinjector study of a novel XFEL in the CompactLight Collaboration	en
heal.classification	Accelerators	en
heal.language	en
heal.access	free
heal.recordProvider	ntua	el
heal.publicationDate	2019-10-21
heal.abstract	The H2020 CompactLight Collaboration Project is an international project of 24 institutes (21 European + 3 extra Europeans), that aims at designing the next generation of compact hard X-Rays Free-Electron Lasers. Currently operating FELs in Europe use S-band (3GHz) accelerating structures.The aim of the project is to produce an innovative compact design with less power demand and of smaller beam energy hard X-Ray FEL in frequencies in the X-band. The conceptual, yet, design relies on high-gradient X-band (12 GHz) accelerating fields, short-period superconductive undulators and bright photoninjectors. The quality of the electron beam injected to the linear accelerator is crucial for the final performance of the X-Ray FEL and depends on a numerous set of parameters. A high quality beam is a beam of a very low emittance, high brightness as well as having the capability of a high repetition rate. The material where the electrons are extracted from is one of these parameters and can either be a metal or a semiconductor. Two candidates were studied, Copper (Cu) and Cesium-Telluride (Cs2Te). For the design of the photoinjector several layouts have been proposed for the project, including design proposals in the S-band, C-band and X-band frequencies. The present Diploma Thesis takes into account several photoinjector layouts and components proposed, including three different normal conducting electron-guns, an 1.5 cells S-band gun, a 2.5 cells S-band and a 4.6 cells X-band gun. This work is divided in three parts. The first part is dedicated to the determination of the material parameters needed to perform the simulations.The second part presents several aspects of the beam dynamics theory applied to some of the proposed layouts and compares the performance of the two materials, Cu (Cu) and Cesium-Telluride (Cs2Te), in all the guns. The simulations required were performed using the code ASTRA, a space charge tracking algorithm. The third part is concerned with the optimisation of two photoinjectors, one in the S-band, 1.5 cells gun, and one in the X-band, 4.6 cells gun, operating with a Cu photocathode. The optimisation has manual and algorithmic parts, with the latter being performed by the code GIOTTO, designed to perform ASTRA simulations through a genetic algorithm. Lastly, the last part compares these results with the performance of the optimised lattice operating with a Cs2Te photocathode. The main goal of this thesis is to study possible layouts of the photoinjector in terms of the CompactLight project, to present the pros and cons of the different photocathode materials through their performance in the proposed lattices and examine the limits of their optimisation.	en
heal.advisorName	Γαζής, Ευάγγελος	el
heal.committeeMemberName	Ξανθάκης, Ιωάννης	el
heal.committeeMemberName	Γλύτσης, Ηλίας	el
heal.academicPublisher	Σχολή Ηλεκτρολόγων Μηχανικών και Μηχανικών Υπολογιστών	el
heal.academicPublisherID	ntua
heal.numberOfPages	190 σ.	el
heal.fullTextAvailability	false