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Study of the Superconducting Medium Beta Cavity of the European Spallation Source

Pirani, Saeid LU (2020)
Abstract
The thesis explains the design, fabrication, vertical test, higher order mode (HOM) and field emission study of the ESS superconducting medium beta (MB) cavity. The ESS MB cavity is a 6-cell elliptical cavity. The main criteria for a multicell elliptical cavity design are explained. The multicell elliptical cavity fabrication process is discussed. The vertical test results of the MB cavity are explained.
The MB cavity HOM is studied and the effect of mechanical errors on a specific HOM frequency deviation through a systematic approach is explained. The HOM measurement results are explained, furthermore searching of a specific HOM, which specified as the dangerous HOM.
The field emission dynamics of the MB cavity are studied... (More)
The thesis explains the design, fabrication, vertical test, higher order mode (HOM) and field emission study of the ESS superconducting medium beta (MB) cavity. The ESS MB cavity is a 6-cell elliptical cavity. The main criteria for a multicell elliptical cavity design are explained. The multicell elliptical cavity fabrication process is discussed. The vertical test results of the MB cavity are explained.
The MB cavity HOM is studied and the effect of mechanical errors on a specific HOM frequency deviation through a systematic approach is explained. The HOM measurement results are explained, furthermore searching of a specific HOM, which specified as the dangerous HOM.
The field emission dynamics of the MB cavity are studied through CST electron tracking. The electron tracking results are post-processed to count the number of impact electrons versus their impact energy.
(Less)
Please use this url to cite or link to this publication:
author
supervisor
opponent
  • Professor Bousson, Sebastien, French National Centre for Scientific Research, Paris, France
organization
publishing date
type
Thesis
publication status
published
subject
keywords
SRF elliptical cavity, higher order mode, Qext, field emission, elliptical cavity design, vertical test, Fysicumarkivet A:2020:Pirani
pages
161 pages
publisher
Lund University, Faculty of Science
defense location
Lecture hall Rydberg (Rydbergsalen), Fysicum, Professorsgatan 1, Lund
defense date
2020-03-27 13:00:00
ISBN
978-91-7895-456-8
978-91-7895-457-5
language
English
LU publication?
yes
id
9abfc7ad-adf2-4e03-9a93-176d7671239f
date added to LUP
2020-03-03 14:26:54
date last changed
2020-12-03 09:04:06
@phdthesis{9abfc7ad-adf2-4e03-9a93-176d7671239f,
  abstract     = {{The thesis explains the design, fabrication, vertical test, higher order mode (HOM) and field emission study of the ESS superconducting medium beta (MB) cavity. The ESS MB cavity is a 6-cell elliptical cavity. The main criteria for a multicell elliptical cavity design are explained. The multicell elliptical cavity fabrication process is discussed. The vertical test results of the MB cavity are explained. <br/>The MB cavity HOM is studied and the effect of mechanical errors on a specific HOM frequency deviation through a systematic approach is explained. The HOM measurement results are explained, furthermore searching of a specific HOM, which specified as the dangerous HOM. <br/>The field emission dynamics of the MB cavity are studied through CST electron tracking. The electron tracking results are post-processed to count the number of impact electrons versus their impact energy.<br/>}},
  author       = {{Pirani, Saeid}},
  isbn         = {{978-91-7895-456-8}},
  keywords     = {{SRF elliptical cavity; higher order mode; Qext; field emission; elliptical cavity design; vertical test; Fysicumarkivet A:2020:Pirani}},
  language     = {{eng}},
  month        = {{03}},
  publisher    = {{Lund University, Faculty of Science}},
  school       = {{Lund University}},
  title        = {{Study of the Superconducting Medium Beta Cavity of the European Spallation Source}},
  url          = {{https://lup.lub.lu.se/search/files/76828159/Saeid_Pirani_ALL.pdf}},
  year         = {{2020}},
}