Study on the frequency tuning of half-wave resonator at IMP

A 162.5 MHz superconducting half-wave resonator (HWR) with geometry beta of 0.09 is being developed for Injector II of China Accelerator Driven Sub-critical System (CADS) Project at the Institute of Modern Physics (IMP). The HWR section composed of 16 HWR cavities will accelerate the proton beam fro...

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Bibliographic Details
Published inarXiv.org
Main Authors He, Shoubo, He, Yuan, Yue, Weiming, Zhang, Cong, Zhang, Shenghu, Zhao, Hongwei, Liu, Lubei, Wang, Fengfeng
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 24.09.2013
Subjects
CAD
Computer aided design
Deformation mechanisms
External pressure
Frequency drift
Frequency shift
Helium
Holes
Lorentz force
Physics - Accelerator Physics
Proton beams
Resonators
Tuning
Variations
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Summary:A 162.5 MHz superconducting half-wave resonator (HWR) with geometry beta of 0.09 is being developed for Injector II of China Accelerator Driven Sub-critical System (CADS) Project at the Institute of Modern Physics (IMP). The HWR section composed of 16 HWR cavities will accelerate the proton beam from 2.1 MeV to 10 MeV. The RF and mechanical coupled analysis are essential in geometry design in order to predict the deformation of the cavity walls and the frequency shift caused by the deformation. In this paper, the detuning caused by both bath helium pressure and Lorentz force is analysed and a tuning system has been investigated and designed to compensate the detuning by deforming the cavity along the beam axis. The simulations performed with ANSYS code show that the tuning system can adjust and compensate the frequency drift due to external vibrations and helium pressure fluctuation during operation.
ISSN:2331-8422
DOI:10.48550/arxiv.1307.3354