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

Saeid Pirani

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

Saeid Pirani

Particle and nuclear physics

Research output: Thesis › Doctoral Thesis (monograph)

278 Downloads (Pure)

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 through CST electron tracking. The electron tracking results are post-processed to count the number of impact electrons versus their impact energy.

Original language	English
Qualification	Doctor
Awarding Institution	Particle and nuclear physics
Supervisors/Advisors	Lindroos, Mats, Supervisor Eshraqi, Mamad, Assistant supervisor Michelato, Paolo, Assistant supervisor, External person Åkesson, Torsten, Assistant supervisor
Thesis sponsors	European Spallation Source ESS ERIC
Award date	2020 Mar 27
Place of Publication	Lund
Publisher	Lund University, Faculty of Science
ISBN (Print)	978-91-7895-456-8
ISBN (electronic)	978-91-7895-457-5
Publication status	Published - 2020 Mar 2

Bibliographical note

Defence details
Date: 2020-03-27
Time: 13:00
Place: Lecture hall Rydberg (Rydbergsalen), Fysicum, Professorsgatan 1, Lund
External reviewer(s)
Name: Bousson, Sebastien
Title: Professor
Affiliation: French National Centre for Scientific Research, Paris, France
---

Subject classification (UKÄ)

Physical Sciences

Free keywords

SRF elliptical cavity
higher order mode
Qext
field emission
elliptical cavity design
vertical test
Fysicumarkivet A:2020:Pirani

Access to Document

Saeid Pirani_ALLFinal published version, 32.4 MB

Cite this

@phdthesis{9abfc7adadf24e039a93176d7671239f,

title = "Study of the Superconducting Medium Beta Cavity of the European Spallation Source",

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 through CST electron tracking. The electron tracking results are post-processed to count the number of impact electrons versus their impact energy.",

keywords = "SRF elliptical cavity, higher order mode, Qext, field emission, elliptical cavity design, vertical test, Fysicumarkivet A:2020:Pirani",

author = "Saeid Pirani",

note = "Defence details Date: 2020-03-27 Time: 13:00 Place: Lecture hall Rydberg (Rydbergsalen), Fysicum, Professorsgatan 1, Lund External reviewer(s) Name: Bousson, Sebastien Title: Professor Affiliation: French National Centre for Scientific Research, Paris, France ---",

year = "2020",

month = mar,

day = "2",

language = "English",

isbn = "978-91-7895-456-8",

publisher = "Lund University, Faculty of Science",

type = "Doctoral Thesis (monograph)",

school = "Particle and nuclear physics",

}

TY - THES

T1 - Study of the Superconducting Medium Beta Cavity of the European Spallation Source

AU - Pirani, Saeid

N1 - Defence details Date: 2020-03-27 Time: 13:00 Place: Lecture hall Rydberg (Rydbergsalen), Fysicum, Professorsgatan 1, Lund External reviewer(s) Name: Bousson, Sebastien Title: Professor Affiliation: French National Centre for Scientific Research, Paris, France ---

PY - 2020/3/2

Y1 - 2020/3/2

N2 - 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.

AB - 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.

KW - SRF elliptical cavity

KW - higher order mode

KW - Qext

KW - field emission

KW - elliptical cavity design

KW - vertical test

KW - Fysicumarkivet A:2020:Pirani

M3 - Doctoral Thesis (monograph)

SN - 978-91-7895-456-8

PB - Lund University, Faculty of Science

CY - Lund

ER -

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

Abstract

Bibliographical note

Subject classification (UKÄ)

Free keywords

Access to Document

Fingerprint

Cite this