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Research toward high-power efficiency and high-gradient dielectric assist accelerating structure.

Research Project

Project/Area Number 19K20609
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 80040:Quantum beam science-related
Research InstitutionNational Institute of Advanced Industrial Science and Technology

Principal Investigator

Satoh Daisuke  国立研究開発法人産業技術総合研究所, 計量標準総合センター, 研究員 (40780086)

Project Period (FY) 2019-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords電子加速 / 高周波加速管 / 誘電体 / 誘電体アシスト型加速管 / 二次電子放出係数 / DLC / セラミックス / 加速管
Outline of Research at the Start

本研究は、常伝導加速管を超える高い加速効率と超高電界加速を可能にする誘電体アシスト型加速管の開発であるが、その実現のために、(1)高誘電率誘電体の選定とその基礎物性(複素誘電率、2次電子放出係数など)計測を重点的に行い、それらの計測で得られた結果をもとに(2)加速管の高周波・機械設計と製作、(3)低電力高周波測定・高電界試験による加速管性能の評価まで実施する計画である。

Outline of Final Research Achievements

In the project, we have developed a dielectric assist accelerating (DAA) structure to overcome the limitations of existing metal accelerating structures in terms of power efficiency and maximum accelerating gradient. By coating the surface of MgO ceramics with diamond-like carbon (DLC), the secondary electron emission coefficient was significantly reduced without excess dielectric loss. As a result, an accelerating gradient of more than 10 MV/m was successfully excited in a DAA structure using MgO cells with DLC coating while maintaining a high Q-value.

Academic Significance and Societal Importance of the Research Achievements

本加速管の性能は、常伝導加速管の4倍以上の加速効率を有しており、既存の常伝導加速管を本加速管に置き換えるだけで、必要電力を1/4に低減化することができる。また、誘電体の材料費が安価であることから、加速管の製造コストも常伝導加速管の1/3程度で済んでしまう。さらには、高周波電源の小型化が可能となり、加速器システム全体の小型化、省電力化、低価格化が期待され、従来は困難であった加速器の可搬型などが比較的簡単に実現できる可能性がある。その結果、高エネルギー電子ビームの利用範囲が大きく拡大することが期待され、学術面・産業面ともに大きな波及効果が期待される。

Report

(3 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • Research Products

    (6 results)

All 2021 2020 2019

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (3 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results)

  • [Journal Article] Multipactor suppression in dielectric-assist accelerating structures via diamondlike carbon coatings2021

    • Author(s)
      Mori Shingo、Yoshida Mitsuhiro、Satoh Daisuke
    • Journal Title

      Physical Review Accelerators and Beams

      Volume: 24 Issue: 2 Pages: 0-11

    • DOI

      10.1103/physrevaccelbeams.24.022001

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 誘電体アシスト型高周波加速管の研究2020

    • Author(s)
      佐藤 大輔
    • Journal Title

      加速器

      Volume: 17 Pages: 4-11

    • NAID

      130008101430

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Power efficiency enhancement of dielectric assist accelerating structure2019

    • Author(s)
      Satoh Daisuke、Shibuya Tatsunori、Ogawa Hiroshi、Tanaka Masahito、Kuroda Ryunosuke、Mori Shingo、Yoshida Mitsuhiro、Toyokawa Hiroyuki
    • Journal Title

      Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms

      Volume: 459 Pages: 148-152

    • DOI

      10.1016/j.nimb.2019.09.006

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Toward high power efficiency and high gradient dielectric assist accelerating structures2020

    • Author(s)
      Daisuke Satoh*, Shingo Mori, Mitsuhiro Yoshida, Ryunosuke Kuroda, Hiroyuki Toyokawa
    • Organizer
      11th International Particle Accelerator conference (IPAC20)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Design and Development of Dielectric Assist Accelerating Structure2019

    • Author(s)
      Daisuke Satoh*, Tatsunori Shibuya, Hiroshi Ogawa, Masahito Tanaka, Ryunosuke Kuroda, Shingo Mori, Mitsuhiro Yoshida, Hiroyuki Toyokawa
    • Organizer
      13th European Conference on Accelerators in Applied Research and Technology
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 誘電体アシスト型高周波加速空洞の研究開発2019

    • Author(s)
      佐藤大輔
    • Organizer
      第16回 日本加速器学会年会
    • Related Report
      2019 Research-status Report
    • Invited

URL: 

Published: 2019-04-18   Modified: 2022-01-27  

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