TU Darmstadt / ULB / TUbiblio

Development of an SRF Reduced-beta Cavity for the Injector of the S-DALINAC

Bazyl, Dmitry (2019):
Development of an SRF Reduced-beta Cavity for the Injector of the S-DALINAC.
Darmstadt, Technische Universität, [Online-Edition: https://tuprints.ulb.tu-darmstadt.de/8791],
[Ph.D. Thesis]

Abstract

A recent major upgrade of the superconducting - Darmstadt linear accelerator (S-DALINAC) allowed to conduct the first operational tests in an energy recovery linac (ERL) mode. The ERL operating regime imposes strict requirements for many accelerator components as well as for the accelerated beam quality and the beam energy spread in particular. At present, a significant beam energy spread is being observed in the capture section of the S-DALINAC. In that regard, the capture section part of the S-DALINAC injector needs to be upgraded in order to reduce the beam energy spread growth.

In this work, the 6-cell reduced-beta cavity development process is discussed and a final cavity design is proposed. The SRF cavity design is not limited by electromagnetic field simulations, but also includes the longitudinal beam dynamics computations and the cavity mechanical model investigation. The main challenge was to find an optimal upgrade solution that would satisfy contradictory requirements with minimised investments costs. The results of multi-physics simulations and qualitative analysis that allowed to make decisions related to the SRF cavity design considerations are discussed. The suggested 6-cell SRF cavity is expected to be manufactured by the end of 2019. The cavity commissioning tests are planned in 2020.

Item Type: Ph.D. Thesis
Erschienen: 2019
Creators: Bazyl, Dmitry
Title: Development of an SRF Reduced-beta Cavity for the Injector of the S-DALINAC
Language: English
Abstract:

A recent major upgrade of the superconducting - Darmstadt linear accelerator (S-DALINAC) allowed to conduct the first operational tests in an energy recovery linac (ERL) mode. The ERL operating regime imposes strict requirements for many accelerator components as well as for the accelerated beam quality and the beam energy spread in particular. At present, a significant beam energy spread is being observed in the capture section of the S-DALINAC. In that regard, the capture section part of the S-DALINAC injector needs to be upgraded in order to reduce the beam energy spread growth.

In this work, the 6-cell reduced-beta cavity development process is discussed and a final cavity design is proposed. The SRF cavity design is not limited by electromagnetic field simulations, but also includes the longitudinal beam dynamics computations and the cavity mechanical model investigation. The main challenge was to find an optimal upgrade solution that would satisfy contradictory requirements with minimised investments costs. The results of multi-physics simulations and qualitative analysis that allowed to make decisions related to the SRF cavity design considerations are discussed. The suggested 6-cell SRF cavity is expected to be manufactured by the end of 2019. The cavity commissioning tests are planned in 2020.

Place of Publication: Darmstadt
Divisions: 18 Department of Electrical Engineering and Information Technology
18 Department of Electrical Engineering and Information Technology > Institute for Accelerator Science and Electromagnetic Fields > Electromagnetic Field Theory (until 31.12.2018 Computational Electromagnetics Laboratory)
18 Department of Electrical Engineering and Information Technology > Institute for Accelerator Science and Electromagnetic Fields
Date Deposited: 23 Jun 2019 19:55
Official URL: https://tuprints.ulb.tu-darmstadt.de/8791
URN: urn:nbn:de:tuda-tuprints-87910
Referees: De Gersem, Prof. Dr. Herbert and Enders, Prof. Dr. Joachim and Jakoby, Prof. Dr. Rolf and Schlaak, Prof. Dr. Helmut
Refereed / Verteidigung / mdl. Prüfung: 20 May 2019
Alternative Abstract:
Alternative abstract Language
Die neueste wichtige Verbesserung des supraleitenden Darmstädter Elektronenlinearbeschleunigers (Englisch: superconducting Darmstadt electron linear accelerator, S-DALINAC) erlaubte die ersten Funktionsprüfungen in einem Energierückgewinnungsmodus (Englisch: energy recovery linac, ERL) durchzuführen. Der Betrieb eines Beschleunigers als ERL stellt strenge Anforderungen an viele Bestandteile des Beschleunigers sowohl die Qualität des beschleunigten Strahls betreffend als auch insbesondere an die Energieverteilung innerhalb des Teilchenpakets. Gegenwärtig wird eine erhebliche Energieverteilung in der Capture Section des S-DALINAC beobachtet. Diesbezüglich soll die Capture Section des S-DALINAC Injectors verbessert werden, damit das Wachstum der Energieverteilung verringert wird. In dieser Arbeit wird der Entwicklungsprozess einer reduzierten-beta-Kavität mit 6 Zellen diskutiert. In diesem Fall ist das Design der SRF-Kavität nicht auf Simulationen des elektromagnetischen Feldes begrenzt. Es beinhaltet zudem Berechnungen der longitudinalen Strahldynamik und eine Untersuchung des mechanischen Kavitätsmodells. Die zentrale Herausforderung bestand darin, einen optimalen Verbesserungsvorschlag zu finden, der den widersprüchlichen Anforderungen mit minimierten Investitionskosten gerecht wird. In der Arbeit werden Ergebnisse von multiphysikalischen Simulationen und einer qualitativen Analyse diskutiert, die erlauben, Entscheidungen in Bezug auf Design der SRF-Kavität zu treffen. Erwartungsgemäß wird die vorgeschlagene 6-zellige SRF-Kavität Ende 2019 hergestellt. Die Inbetriebnahme ist für das Jahr 2020 geplant.German
Export:

Optionen (nur für Redakteure)

View Item View Item