超放射による超小型短パルス・コヒーレントテラヘルツ光源

2015 Fiscal Year Annual Research Report

• Project/Area Number: 23226020
• Research Institution: High Energy Accelerator Research Organization
• Principal Investigator: 浦川 順治 大学共同利用機関法人高エネルギー加速器研究機構, 研究支援戦略推進部, URA (00160333)
• Project Period (FY): 2011-04-01 – 2016-03-31
• Keywords: 高周波電子銃 / フェムト秒レーザー / フォトカソード / 高電界加速 / 自由電子レーザー

Outline of Annual Research Achievements

フェムト秒パルスレーザー3倍高調波出力の高強度化(1.0mJから2.7mJへ)及び高安定化(pointing and energy stability <1.0%)を進め、光カソードからの90フェムト秒電子単バンチビーム生成・加速(8MeV)および遷移放射又はスミスパーセル放射によるブロードバンド又は準単色THz(0.3～10THz)特性測定を行った。現状、光高周波電子銃空洞の最大加速電界が80MV/mで120MV/mに達していない為、空間電荷効果を無視できるマイクロバンチ電荷量が1pCから2pC程度であり、スミスパーセル放射で放射電磁波エネルギーは1uJ程度であった。2から4ミクロバンチ生成によるTHz超放射確認実験は、30cm-5周期小型ウィグラー磁石を使って行った。ウィグラー磁石Gap調整によりFEL共鳴放射条件を満足させた結果、Sub-THz超放射測定に成功した。英国、ロシア、インドのTHz利用研究者達が予備実験を開始した。ロシアの研究者の測定実験において、マイクロバンチ電子ビームは安定で規格化エミッタンスは4から5x10E(-6)mであった。
Single micro-bunch測定で得られた電磁波エネルギーは約200nJ、時間幅測定160fsからPeak Power 約2MWが確認できた。4 micro-bunch運転での干渉効果によって、8MWのPeak Power生成を300GHz電磁波で測定した。ウィグラー磁石や遷移放射及びスミスパーセル放射のスペクトル測定により、6THzまでの高調波電磁波測定に成功しているので、Pre-bunched FELの実証実験は行えた。放射Peak Powerを数THz領域で10MW以上にするには、電子銃空洞内の最大加速電界を100MV/m以上にすれば可能であることもSimulationにより明らかになっている。3ヶ月程度の空洞高電界運転調整後、100MV/m加速を達成できるので、非線形現象研究を含めた高輝度THzビームの国際共同利用実験を展開する。

Research Progress Status

27年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

27年度が最終年度であるため、記入しない。

Research Products

• [Int'l Joint Research] Ｔｏｍｓｋ Ｐｏｌｙｔｅｃｈｎｉｃ Ｕｎｉｖｅｒｓｉｔｙ/ＭＥＰｈＩ/Ｓａｉｎｔ Ｐｅｔｅｒｓｂｕｒｇ Ｓｔａｔｅ Ｕｎｉｖｅｒｓｉｔｙ(ロシア連邦)
  • Country Name: RUSSIA FEDERATION
  • Counterpart Institution: Ｔｏｍｓｋ Ｐｏｌｙｔｅｃｈｎｉｃ Ｕｎｉｖｅｒｓｉｔｙ/ＭＥＰｈＩ/Ｓａｉｎｔ Ｐｅｔｅｒｓｂｕｒｇ Ｓｔａｔｅ Ｕｎｉｖｅｒｓｉｔｙ
• [Int'l Joint Research] Ｊｏｈｎ Ａｄａｍｓ Ｉｎｓｔｉｔｕｔｅ/Ｕｎｉｖｅｒｓｉｔｙ ｏｆ Ｏｘｆｏｒｄ/Ｕｎｉｖｅｒｓｉｔｙ ｏｆ Ｓｔｒａｔｈｃｌｙｄｅ(英国)
  • Country Name: UNITED KINGDOM
  • Counterpart Institution: Ｊｏｈｎ Ａｄａｍｓ Ｉｎｓｔｉｔｕｔｅ/Ｕｎｉｖｅｒｓｉｔｙ ｏｆ Ｏｘｆｏｒｄ/Ｕｎｉｖｅｒｓｉｔｙ ｏｆ Ｓｔｒａｔｈｃｌｙｄｅ
  • # of Other Institutions: 1
• [Int'l Joint Research] IUAC/SAMEER(インド)
  • Country Name: INDIA
  • Counterpart Institution: IUAC/SAMEER
• [Int'l Joint Research] 上海交通大学/精華大学/華中科技大学(中国)
  • Country Name: CHINA
  • Counterpart Institution: 上海交通大学/精華大学/華中科技大学
• [Journal Article] CST simulation of THz radiation from a channel with periodically variable radius (2015)
  • Author(s): A.A. Ponomarenko , K.V. Lekomtsev , A.A. Tishchenko , M.N. Strikhanov , J. Urakawa
  • Journal Title: Nuclear Instruments and Methods in Physics Research B Volume: 355 Pages: 160-163
  • DOI: 10.1016/j.nimb.2015.03.004
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] CST simulations of THz Smith Purcell radiation from a lamellar grating with vacuum gaps (2015)
  • Author(s): K. Lekomtsev , P. Karataev , A.A. Tishchenko , J. Urakawa
  • Journal Title: Nuclear Instruments and Methods in Physics Research B Volume: 355 Pages: 164-169
  • DOI: 10.1016/j.nimb.2015.02.056
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Coherent radiation spectrum measurements at KEK LUCX facility (2015)
  • Author(s): M. Shevelev, A.Aryshev, S.Araki, M.Fukuda, P.Karataev, N.Terunuma, J. Urakawa
  • Journal Title: Nuclear Instruments and Methods in Physics Research Section A Volume: 771 Pages: 126-133
  • DOI: 10.1016/j.nima.2014.10.038
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Very high resolution optical transition radiation imaging system: Comparison between simulation and experiment (2015)
  • Author(s): B. Bolzon, A. Aryshev, T. Aumeyr, S. Boogert, P. Karataev, K. O. Kruchinin, T. Lefevre, S. Mazzoni, L. Nevay, M. Shevelev, N. Terunuma, J. Urakawa, and C. P. Welsch
  • Journal Title: PHYSICAL REVIEW SPECIAL TOPICS - ACCELERATORS AND BEAMS Volume: 18 Pages: 082803-1, -8
  • DOI: 10.1103/PhysRevSTAB.18.082803
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] FEL Enhancement with a Microbunch Structure by a Phase-Space Rotation Technique (2016)
  • Author(s): Masao Kuriki, Ryukou Kato, Kazuhiro Ohmi, Yuji Seimiya, Junji Urakawa, Shugeru Kashiwagi
  • Organizer: 28th Linear Accelerator Conference
  • Place of Presentation: Kellogg Hotel and Conference Centre in East Lansing, Michigan USA
  • Year and Date: 2016-09-25 – 2016-09-30
  • Int'l Joint Research
• [Presentation] FIRST STEPS TOWARDS A SINGLE-SHOT LONGITUDINAL PROFILE MONITOR: STUDY OF THE PROPERTIES OF COHERENT SMITH-PURCELL RADIATION USING THE SURFACE CURRENT MODEL (2016)
  • Author(s): H. Harrison, A. J. Lancaster, G. Doucas, I. V. Konoplev, A. AryshevK. Lekomtsev, M. Shevelev, N.Terunuma, J. Urakawa
  • Organizer: 7th International Particle Accelerator Conference
  • Place of Presentation: BEXCO Busan, Korea
  • Year and Date: 2016-05-08 – 2016-05-13
  • Int'l Joint Research
• [Presentation] STATUS OF DESIGN AND DEVELOPMENT OF DELHI LIGHT SOURCE AT IUAC, DELHI (2016)
  • Author(s): S.Ghosh, J.Urakawa, N.Terunuma, S.Fukuda, M.Fukuda, A.Aryshev, B.K.Sahu, P.Patra, S.R.Abhilash, J.Karmakar, B.Karmakar, D.Kabiraj, N.Kumar, A.Sharma, V.Joshi, G.K.Chaudhari, , A.Deshpande, T.Rao, V.Naik, A.Roy, R.K.Bhandari and D.Kanjilal
  • Organizer: 7th International Particle Accelerator Conference
  • Place of Presentation: BEXCO Busan, Korea
  • Year and Date: 2016-05-08 – 2016-05-13
  • Int'l Joint Research
• [Presentation] PRE-BUNCHED ELECTRON BEAM EMITTANCE SIMULATION AND MEASUREMENT (2016)
  • Author(s): Yu.D. Kliuchevskaia, S.M. Polozov, A. Aryshev, M. Shevelev, N. Terunuma, J. Urakawa
  • Organizer: 7th International Particle Accelerator Conference
  • Place of Presentation: BEXCO Busan, Korea
  • Year and Date: 2016-05-08 – 2016-05-13
  • Int'l Joint Research
• [Presentation] Six-dimensional Phase-space Rotation and its Applications (2016)
  • Author(s): M. Kuriki, K. Negishi, H. Hayano, R. Kato, K. Ohmi, M. Satoh, Y.Seimiya, J. Urakawa,S. Kashiwagi
  • Organizer: 7th International Particle Accelerator Conference
  • Place of Presentation: BEXCO Busan, Korea
  • Year and Date: 2016-05-08 – 2016-05-13
  • Int'l Joint Research
• [Presentation] Experimental investigation of THz Smith-Purcell radiation from composite corrugated capillary (2016)
  • Author(s): K. Lekomtsev, A. Aryshev, N. Terunuma, J. Urakawa, A. A. Ponomarenko, A. A. Tishchenko
  • Organizer: 7th International Particle Accelerator Conference
  • Place of Presentation: BEXCO Busan, Korea
  • Year and Date: 2016-05-08 – 2016-05-13
  • Int'l Joint Research
• [Presentation] DEVELOPMENT AND UPGRADE PLAN OF AN X-RAY SOURCE BASED ON LASER COMPTON SCATTERING IN LASER UNDULATOR COMPACT X-RAY SOURCE(LUCX) (2016)
  • Author(s): M. Fukuda, S. Araki, Y. Honda, N. Terunuma, J. Urakawa, K. Sakaue, M. Washio, A. Momose, M. Olbinado, Y. Wu, M. Kageyama, M. Kuribayashi
  • Organizer: 7th International Particle Accelerator Conference
  • Place of Presentation: BEXCO Busan, Korea
  • Year and Date: 2016-05-08 – 2016-05-13
  • Int'l Joint Research
• [Presentation] Cs2Te PHOTOCATHODE RESPONSE TIME MEASUREMENTS AND FEMTOSECOND COMB ELECTRON BEAM GENERATION AS A MILESTONE TOWARDS PRE-BUNCHED THZ FEL REALIZATION (2016)
  • Author(s): A. Aryshev, Y. Honda, K. Lekomtsev, M. Shevelev, N. Terunuma, and J. Urakawa
  • Organizer: 7th International Particle Accelerator Conference
  • Place of Presentation: BEXCO Busan, Korea
  • Year and Date: 2016-05-08 – 2016-05-13
  • Int'l Joint Research
• [Presentation] 位相空間回転によるマイクロバンチ構造の生成とその応用 (2016)
  • Author(s): 栗木雅夫, 根岸健太郎, 清宮裕史, 加藤龍好, 大見和史, 浦川順治, 柏木茂
  • Organizer: 第71回日本物理学会年次大会
  • Place of Presentation: 東北学院泉キャンパス（宮城県仙台市）
  • Year and Date: 2016-03-19 – 2016-03-22
• [Presentation] THz production at LUCX (2016)
  • Author(s): 浦川順治
  • Organizer: 7th Asian Forum for Accelerators and Detectors "AFAD 2016"
  • Place of Presentation: Uji Campus, Kyoto University（京都府宇治市）
  • Year and Date: 2016-02-01 – 2016-02-03
  • Int'l Joint Research
• [Presentation] LUCX X-ray Source and Imaging (2016)
  • Author(s): 浦川順治
  • Organizer: 7th Asian Forum for Accelerators and Detectors "AFAD 2016"
  • Place of Presentation: Uji Campus, Kyoto University（京都府宇治市）
  • Year and Date: 2016-02-01 – 2016-02-03
  • Int'l Joint Research
• [Presentation] cERL X-ray Source and Imaging (2016)
  • Author(s): 浦川順治
  • Organizer: 7th Asian Forum for Accelerators and Detectors "AFAD 2016"
  • Place of Presentation: Uji Campus, Kyoto University（京都府宇治市）
  • Year and Date: 2016-02-01 – 2016-02-03
  • Int'l Joint Research
• [Presentation] Generation of THz Smith-Purcell radiation on femtosecond electron beam (2015)
  • Author(s): Konstantin Lekomtsev, Alexander Aryshev, Mikhail Shevelev, Nobuhiro Terunuma, Junji Urakawa
  • Organizer: The XI International Symposium &laquo;Radiation from Relativistic Electrons in Periodic Structures&raquo;
  • Place of Presentation: Saint Petersburg, Russian Federation
  • Year and Date: 2015-09-06 – 2015-09-12
  • Int'l Joint Research
• [Presentation] Electron Bunch Length Diagnostics for the LUCX Facility based on the Coherent Off-axis Undulator Radiation (2015)
  • Author(s): Dmitry Shkitov, Junji Urakawa, Alexander Potylitsyn
  • Organizer: The XI International Symposium &laquo;Radiation from Relativistic Electrons in Periodic Structures&raquo;
  • Place of Presentation: Saint Petersburg, Russian Federation
  • Year and Date: 2015-09-06 – 2015-09-12
  • Int'l Joint Research
• [Presentation] Coherent Radiation Measurements Stations at KEK LUCX Facility (2015)
  • Author(s): Mikhail Shevelev, Alexander Aryshev, Junji Urakawa, Nobuhiro Terunuma, Yosuke Honda
  • Organizer: The XI International Symposium &laquo;Radiation from Relativistic Electrons in Periodic Structures&raquo;
  • Place of Presentation: Saint Petersburg, Russian Federation
  • Year and Date: 2015-09-06 – 2015-09-12
  • Int'l Joint Research
• [Presentation] Corrugated capillary as THz Cherenkov Smith-Purcell radiator (2015)
  • Author(s): Konstantin Lekomtsev, Nobuhiro Terunuma, Alexey Tishchenko, Alexander Aryshev, Junji Urakawa, Alexsandr Ponomarenko, M.N. Strikhanov , Vasily Sukharev
  • Organizer: The XI International Symposium &laquo;Radiation from Relativistic Electrons in Periodic Structures&raquo;
  • Place of Presentation: Saint Petersburg, Russian Federation
  • Year and Date: 2015-09-06 – 2015-09-12
  • Int'l Joint Research
• [Presentation] Progress Towards Compact Pre-bunched FEL Realization (2015)
  • Author(s): Alexander Aryshev, Mikhail Shevelev, Masafumi Fukuda, Yosuke Honda, Nobuhiro Terunuma, Junji Urakawa
  • Organizer: The XI International Symposium &laquo;Radiation from Relativistic Electrons in Periodic Structures&raquo;
  • Place of Presentation: Saint Petersburg, Russian Federation
  • Year and Date: 2015-09-06 – 2015-09-12
  • Int'l Joint Research / Invited
• [Presentation] Progress towards table-top pre-bunched THz FEL and its application to soft X-ray generation via inverse Compton scattering (2015)
  • Author(s): Alexander Aryshev, Mikhail Shevelev, Konstantin Lekomtsev, Masafumi Fukuda, Yosuke Honda, Nobuhiro Terunuma, Junji Urakawa
  • Organizer: 第12回日本加速器学会年会
  • Place of Presentation: プラザ萬象・あいあいプラザ(福井県敦賀市）
  • Year and Date: 2015-08-05 – 2015-08-07
• [Presentation] 傾き制御電子バンチによるコヒーレントテラヘルツ光発生 (2015)
  • Author(s): 坂上 和之，西田 万里子，水柿 将貴，鷲尾 方一，浦川 順治，平 義隆，黒田 隆之助
  • Organizer: 第12回日本加速器学会年会
  • Place of Presentation: プラザ萬象・あいあいプラザ(福井県敦賀市）
  • Year and Date: 2015-08-05 – 2015-08-07
• [Presentation] フォトカソードRF電子銃を用いたMeV電子顕微鏡の開発 (2015)
  • Author(s): 楊 金峰，谷村 克己，吉田 陽一，浦川 順治
  • Organizer: 第12回日本加速器学会年会
  • Place of Presentation: プラザ萬象・あいあいプラザ(福井県敦賀市）
  • Year and Date: 2015-08-05 – 2015-08-07
• [Presentation] Compact X-ray Source based on advanced accelerator and laser technologies (2015)
  • Author(s): 浦川順治
  • Organizer: 15th International Congress of Radiation Research
  • Place of Presentation: 京都国際会議場(京都府京都市）
  • Year and Date: 2015-05-25 – 2015-05-29
  • Int'l Joint Research
• [Presentation] FEL Enhancement by Microbuch Structure Made with Phase-Space Rotation (2015)
  • Author(s): M. Kuriki, Y. Seimiya, S. Chen, K. Ohmi, J. Urakawa, S. Kashiwagi, R. Kato
  • Organizer: 6th International Particle Accelerator Conference
  • Place of Presentation: Richmond Virginia (USA)
  • Year and Date: 2015-05-03 – 2015-05-08
  • Int'l Joint Research
• [Presentation] CST Simulations of THz Cherenkov Smith-purcell Radiation from Corrugated Capillary (2015)
  • Author(s): K. Lekomtsev, N. Terunuma, J. Urakawa, P. Karataev, A. Ponomarenko, A. .A. Tishchenko
  • Organizer: 6th International Particle Accelerator Conference
  • Place of Presentation: Richmond Virginia (USA)
  • Year and Date: 2015-05-03 – 2015-05-08
  • Int'l Joint Research
• [Presentation] RF Gun Based Ultrafast Electron Microscopy (2015)
  • Author(s): J. Yang, K. Tanimura, Y. Yoshida, J. Urakawa
  • Organizer: 6th International Particle Accelerator Conference
  • Place of Presentation: Richmond Virginia (USA)
  • Year and Date: 2015-05-03 – 2015-05-08
  • Int'l Joint Research
• [Remarks] 超放射による超小型短パルス・コヒーレントテラヘルツ光源開発
  • URL: http://www-atf.kek.jp/thz/index.html
• [Remarks] LUCX Group Homepage
  • URL: http://atfweb-lo.kek.jp/lucx/test.html
• [Remarks] 小型加速器による小型高輝度X 線源とイメージング基盤技術開発
  • URL: http://nkocbeam.kek.jp/
• [Remarks] 小型高輝度光子ビーム発生装置
  • URL: http://kocbeam.kek.jp/
• [Patent(Industrial Property Rights)] レーザーコンプトン散乱を利用した光源用レーザー (2015)
  • Inventor(s): 浦川順治
  • Industrial Property Rights Holder: 高エネルギー加速器研究機構
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: ＣＡ2807.113
  • Filing Date: 2015-04-10
  • Overseas
• [Patent(Industrial Property Rights)] 光共振器を用いるバーストレーザー生成装置 (2015)
  • Inventor(s): 浦川順治
  • Industrial Property Rights Holder: 高エネルギー加速器研究機構
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: ＣＡ2807.113
  • Filing Date: 2015-04-28
  • Overseas
• [Patent(Industrial Property Rights)] Photocathode High-Frequency Electron-Gun Cavity Apparatus (2011)
  • Inventor(s): 浦川順治、照沼信浩、高富俊和
  • Industrial Property Rights Holder: 高エネルギー加速器研究機構
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: US9,224,571 B2
  • Filing Date: 2011-09-26
  • Acquisition Date: 2015-12-29
  • Overseas
• [Patent(Industrial Property Rights)] 光陰極高周波電子銃空洞装置 (2011)
  • Inventor(s): 浦川順治、照沼信浩、高富俊和
  • Industrial Property Rights Holder: 高エネルギー加速器研究機構
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: 特許第5828429号
  • Filing Date: 2011-09-26
  • Acquisition Date: 2015-10-30
• [Funded Workshop] VII Mini-workshop for Advanced Generation of THz and Compton X-ray beams "AGTaX" using compact electron accelerator (2016)
  • Place of Presentation: KEK 2号館、101室
  • Year and Date: 2016-03-03 – 2016-03-03