Unit:
Κατεύθυνση Ηλεκτρονική και Ραδιοηλεκτρολογία (Ρ/Η, με πρόσθετη εξειδίκευση στις Τηλεπικοινωνίες και στην επεξεργασία και διοίκηση της Πληροφορίας)Library of the School of Science
Supervisors info:
Ιωάννης Τίγκελης Αναπλ. Καθηγητής ΕΚΠΑ (Επιβλέπων), Δημήτριος Φραντζεσκάκης Καθηγητής ΕΚΠΑ, Έκτορας Νισταζάκης Επίκ.Καθηγητής ΕΚΠΑ
Original Title:
Σχεδίαση διαύλου δέσμης γυροτρονίου με silicon carbide σε cst studio suite και μελέτη των ωμικών απωλειών και του συντελεστή ποιότητας των ρυθμών
Translated title:
Gyrotron beam tunnel design in cst studio suite and loss Q-factor study of modes
Summary:
High-frequency (140 GHz, 170 GHz) gyrotrons exhibit parasitic oscillations
during their operation. In this thesis using the simulation program CST
Microwave studio, we design the layout of the gyrotron beam tunnel with two
conical SiC additions as proposed by JAERI.
Chapter one is a reference to heretofore comments on the operation of the beam
tunnel, the structure and the particular characteristics of SiC.
In the second chapter, we analyze how the design of the device is done as well
as the operating conditions used in order that the simulations are feasible.
The design is based on the linear composition layout respecting the constraints
imposed by the available computing resources. Nevertheless, the absolute
parametric configuration of the model is feasible.
In the third chapter we present the numerical simulations and the techniques
that allow their implementation on computer systems with restricted resources.
The assessment of the spatial distribution of losses is the most important
factor in the decrease of the cells (meshcell) used in the program in order to
produce results. In addition, the post-processing of the numerical results and
the identification of the differences between different models are the basis to
determine qualitatively the behavior of the full layout. The combination of the
above procedures leads to the reduction of the size of the model used in the
simulations.
Finally, in the fourth chapter, the final results as well as the related
figures of Losses and Q-factor are presented.
Keywords:
Cst, Gyrotron, Beam tunnel, Q factor, Loss
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