Research on higher-order-mode (HOM) damping of superconducting cavities for the next-generation synchrotron light sources.

下一代同步加速器光源超导腔高阶模(HOM)阻尼研究。

基本信息

项目摘要

The superconducting (SC) linear accelerator (linac) is one of the key technologies for the next-generation synchrotron light sources. We investigated method of higher-order-mode (HOM) damping for superconducting cavities, that is, one of the important issues for the SC-linacs for preventing beam breakup (BBU) instabilities.We applied the HOM damping method using radial-transmission lines to the 9-cell 1.3-GHz cavities. We investigated the Q-values of the principal HOMs by computer simulations, as well as by rf measurements of model copper cavity. The Q-values of HOMs depended strongly on the distance between the radial line and the end of the cavity. For the monopole modes, such as TM011-like and TM020-like modes, typical external Q-values of about 10,000 were obtained. For the dipole modes, typical Q-values were about 10,000 and about 10,000-100,000 for the TE111-like and the TM110-like modes, respectively. The HOM damping due to this method was good on the whole, however, further improvements are desirable for the TM110-like modes. We are trying to improve this point by such method as enlarging the beam-pipe radius from 39 mm (present) to larger ones.From FY2005,the development of the energy recovery linac (ERL) for the next-generation synchrotron light sources started by collaboration between the High Energy Accelerator Research Organization (KEK) and the Japan Atomic Energy Agency (JAEA). A team for developing the SC cavities for this purpose was organized, and they started their research. The basic research results from our research are fully used for this purpose.
超导直线加速器是下一代同步辐射光源的关键技术之一。研究了超导直线加速器防止束流分裂(BBU)不稳定性的重要问题之一--超导腔的高阶模(HOM)阻尼方法,并将径向传输线HOM阻尼方法应用于9单元1.3GHz超导腔。我们研究了Q值的主要HOMs的计算机模拟,以及通过RF测量模型铜腔。HOM的Q值强烈依赖于径向线和腔端之间的距离。对于类TM 011和类TM 020模式,获得了约10,000的典型外部Q值。对于偶极模式,典型的Q值对于类TE 111模式和类TM 110模式分别为约10,000和约10,000 - 100,000。由于这种方法的HOM阻尼整体上是好的,然而,进一步的改进是可取的TM 110类模式。为了改善这一点,我们正在尝试将束管半径从目前的39 mm扩大到更大。从2005年度开始,高能加速器研究机构(KEK)和日本原子能机构(JAEA)合作开发了用于下一代同步加速器光源的能量回收直线加速器(ERL)。为此,组织了一个开发SC腔的团队,并开始了他们的研究。我们的基础研究成果充分用于这一目的。

项目成果

期刊论文数量(16)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
New higher-order-mode damping scheme for L-band superconducting cavities using a radial transmission line ☆
New higher-order-mode damping scheme for L-band superconducting cavilies using a radial transmission line
使用径向传输线的 L 波段超导腔的新型高阶模阻尼方案
Higher-order-mode damping of L-band superconducting cavity using a radial-line HOM damper
使用径向线 HOM 阻尼器对 L 波段超导腔进行高阶模阻尼
L-バンド超伝導加速空洞のためのラジアル型HOMダンパーの研究
L波段超导加速腔径向型HOM阻尼器研究
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SAKANAKA Shogo其他文献

SAKANAKA Shogo的其他文献

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{{ truncateString('SAKANAKA Shogo', 18)}}的其他基金

Study on the beam dynamics issues in the next-generation synchrotron light sources based on the energy-recovery linacs
基于能量回收直线加速器的下一代同步加速器光源光束动力学问题研究
  • 批准号:
    19540318
  • 财政年份:
    2007
  • 资助金额:
    $ 2.37万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)

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IMR: Phase Ib Energy Recovery Linac (ERL) Technology R&D
IMR:Ib 阶段能量回收直线加速器 (ERL) 技术 R
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Development of Beam Diagnostic Apparatus for Energy Recovery Linac
能量回收直线加速器束流诊断装置的研制
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    21604012
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Energy Recovery Linac (ERL) R&D 2-1-09 to 3-31-10
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  • 批准号:
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Fundamental Research of a superconducting RF cavity for an energy recovery linac
能量回收直线加速器超导射频腔的基础研究
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Phase I Energy Recovery Linac (ERL) Synchrotron Light Source at Cornell University
康奈尔大学第一阶段能量回收直线加速器 (ERL) 同步加速器光源
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Study on Beam Dynamics and Beam Instabilities for a Next Generation Light Source Based on an Energy-Recovery Linac
基于能量回收直线加速器的下一代光源的光束动力学和光束不稳定性研究
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    2003
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