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Fabrication of High Luminance Filament by Non-contact Discharge Welding

Research Project

Project/Area Number 25630297
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Composite materials/Surface and interface engineering
Research InstitutionNational Institute for Materials Science

Principal Investigator

KONNO Takeshi  独立行政法人物質・材料研究機構, 先端材料プロセスユニット, 主幹研究員 (50354171)

Project Period (FY) 2013-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywords電子・電気材料 / 材料加工・処理 / 微小溶接 / グロー放電 / マイクロ・ナノデバイス / 高輝度フィラメント / SEM / 高電圧放電 / フィラメント / 熱電子放出 / 電子線源 / タングステン合金
Outline of Final Research Achievements

In this study, we have successfully fabricated tungsten filament for thermion emitting electron guns. Two tungsten/tungsten alloy wires of 50μm were welded by non-contact discharge welding method and make a reversed V shape structure. The point radius was smaller than that of the common hairpin filament. It will, therefore, expect to show a good thermal electron emission property. The reversed V shape structure was mounted to an SEM instead of hairpin filament. Good images were obtained comparing with those taken by the same SEM mounted a common hairpin filament.

Report

(3 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Research-status Report
  • Research Products

    (2 results)

All 2014 Other

All Presentation (2 results)

  • [Presentation] 極細金属線を溶接して作製したSEM用ポイントフィラメント2014

    • Author(s)
      今野武志,江頭 満,小林幹彦
    • Organizer
      (社)溶接学会
    • Place of Presentation
      黒部市宇奈月国際会館「セレネ」
    • Year and Date
      2014-09-12
    • Related Report
      2014 Annual Research Report
  • [Presentation] 高電圧放電溶接法によるSEM高輝度フィラメントの作製

    • Author(s)
      今野武志,江頭 満,小林幹彦
    • Organizer
      (社)溶接学会
    • Place of Presentation
      パシフィコ横浜会議センター
    • Related Report
      2013 Research-status Report

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Published: 2014-07-25   Modified: 2019-07-29  

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