高輝度光陰極電子銃を実現する先端レーザ技術

• 冨澤 宏光

  (財)高輝度光科学研究センター

書誌事項

タイトル別名

• Advanced Laser Technologies for High-brightness Photocathode Electron Gun
• コウキド コウインキョク デンシジュウ オ ジツゲン スル センタン レーザ ギジュツ

抄録

  A laser-excited photocathode RF gun is one of the most reliable high-brightness electron beam sources for XFELs. Several 3D laser shaping methods have been developed as ideal photocathode illumination sources at SPring-8 since 2001. To suppress the emittance growth caused by nonlinear space-charge forces, the 3D cylindrical UV-pulse was optimized spatially as a flattop and temporally as squarely stacked chirped pulses. This shaping system is a serial combination of a deformable mirror that adaptively shapes the spatial profile with a genetic algorithm and a UV-pulse stacker that consists of four birefringent α-BBO crystal rods for temporal shaping. Using this 3D-shaped pulse, a normalized emittance of 1.4 π mm mrad was obtained in 2006. Utilizing laser's Z-polarization, Schottky-effect-gated photocathode gun was proposed in 2006. The cathode work functions are reduced by a laser-induced Schottky effect. As a result of focusing a radially polarized laser pulse with a hollow lens in vacuum, the Z-field (Z-polarization) is generated at the cathode.<br>

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｖａｃｕｕｍ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｖａｃｕｕｍ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 55 (2), 50-58, 2012

  一般社団法人 日本真空学会

キーワード

• Spectroscopy
• Surfaces and Interfaces
• Instrumentation
• General Materials Science

詳細情報

• CRID: 1390282680270934656
• NII論文ID: 10030337185
• NII書誌ID: AA12298652
• DOI: 10.3131/jvsj2.55.50
• BIBCODE: 2012JVSJ...55...50T
• COI: 1:CAS:528:DC%2BC38Xlt1Squrs%3D
• ISSN: 18824749
• ISSN: 18822398
• NDL書誌ID: 023530107
• Web Site: http://id.ndl.go.jp/bib/023530107
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I023530107
• 本文言語コード: ja
• データソース種別:
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  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可