Basic research of beam instability with high current ERL beam by newly developed position monitor of superconducting cavities precisely

• Project/Area Number: 23740221
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: High Energy Accelerator Research Organization
• Principal Investigator: SAKAI Hiroshi 大学共同利用機関法人高エネルギー加速器研究機構, 加速器研究施設, 准教授 (50345229)
• Project Period (FY): 2011 – 2013
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2013: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000); Fiscal Year 2012: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2011: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
• Keywords: 加速器 / ビーム物理 / 超伝導空洞 / CWライナック / 超精密測定 / エネルギー回収 / 極低温 / モニター / エネルギー回収ライナック / ビーム制御 / 耐放射線 / ビーム不安定性 / ERL / 非接触測定 / レーザー / 超低温 / 超伝導

Research Abstract

Alignment of superconducting cavities is one of the important issues for next generation accelerator like energy recovery linac (ERL). To measure the cavity displacement under cooling to liquid He temperature more precisely, we newly developed the position monitor by using white light interferometer. This monitor is based on the measurement of the interference of light between the measurement target and the reference point. It can measure the position from the outside of the cryomodule. We applied this monitor to the main linac cryomodule at ERL test facility and successfully measured the displacement during 2K cooling with the resolution of +-5um. And by monitoring these displacements in detail, we achieved the energy recovery with 6uA CW beam.

Research Products

• [Journal Article] Precise Measurement of Superconducting Cavity Movement in Cryomodule by the Position Monitor using White Light Interferometer (2014)
  • Author(s): Hiroshi Sakai, Tomohiro Aoto, Kazuhiro Enami, Takaaki Furuya, Masato Sato, Kenji Shinoe, Kensei Umemori, Masaru Sawamura, Enrico Cenni, Kyohei Hayashi, Tsutomu Kanzaki
  • Journal Title: Proceedings of 16th International Conference on RF Superconductivity 2013 (SRF2013) Volume: Vol.1
• [Journal Article] High Power CW Tests of cERL Main-LINAC Cryomodule (2014)
  • Author(s): Hiroshi Sakai, Kazuhiro Enami, Takaaki Furuya, Masato Sato, Kenji Shinoe, Kensei Umemori, Masaru Sawamura, Enrico Cenni
  • Journal Title: Proceedings of 16th International Conference on RF Superconductivity 2013 (SRF2013) Volume: Vol. 1
• [Journal Article] Field Emission Measure during cERL Main LINAC Cryomodule High Power Test in KEK (2014)
  • Author(s): Enrico Cenni, Kazuhiro Enami, Takaaki Furuya, Hiroshi Sakai, Masato Sato, Kenji Shinoe, Kensei Umemori, Masaru Sawamura
  • Journal Title: Proceedings of 16th International Conference on RF Superconductivity 2013 (SRF2013) Volume: Vol. 1
• [Journal Article] Precise Measurement of Superconducting Cavity Movement in Cryomodule by the Position Monitor Using White Light Interferometer (2013)
  • Author(s): H. Sakai, T. Aoto, K. Enami, T. Furuya, M. Sato, K. Shinoe, K. Umemori, E. Cenni, M. Sawamura, K. Hayashi, T. Kanzaki
  • Journal Title: Proc. of SRF2013, (Paris, France) Pages: 288-293
• [Journal Article] Field Emission Measure During cERL Main Linac Cryomodule High Power Test in KEK (2013)
  • Author(s): E. Cenni, T. Furuya, H. Sakai, K. Umemori, K. Enami, K. Shinoe, M. Sato, M. Sawamura
  • Journal Title: Proc. Of SRF2013, (Paris, France) Pages: 672-676
• [Journal Article] Construction of Main Linac Cryomodule for Compact ERL Project (2013)
  • Author(s): K. Umemori, K. Enami, T. Furuya, H. Sakai, M. Sato, K. Shinoe, M. Sawamura, E. Cenni
  • Journal Title: Proc. of IPAC2013, (Shanghai, China) Pages: 2349-2351
• [Journal Article] Construction of Main LINAC Cryomodule for Compact ERL Project (2013)
  • Author(s): Kensei Umemori, Kazuhiro Enami, Takaaki Furuya, Hiroshi Sakai, Masato Sato, Kenji Shinoe, Masaru Sawamura, Enrico Cenni
  • Journal Title: Proceedings of 4th International Particle Accelerator Conference 2013 (IPAC2013) Volume: Vol. 1
• [Journal Article] Status of Main Linac Cryomodule for Compact ERL Project (2012)
  • Author(s): K. Umemori, K. Enami, T. Furuya, H. Sakai, M. Sato, K. Shinoe, M. Sawamura, E. Cenni
  • Journal Title: Proc. of IPAC2012, (New Orleans, U.S.A) Pages: 67-69
• [Journal Article] Status of Main Linac Cryomodule Development for Compact ERL Project (2012)
  • Author(s): Kensei Umemori, Kazuhiro Enami, Takaaki Furuya, Hiroshi Sakai, Masato Satoh, Kenji Shinoe, Masaru Sawamura, Enrico Cenni
  • Journal Title: Proceedings of International Particle Accelerator Conference 2012 (IPAC2012) Volume: Vol.1
• [Journal Article] Field Emission Simulation for KEK-ERL 9-cell Superconducting Cavity (2012)
  • Author(s): Eenrico Cenni, Takaaki Furuya, Hiroshi Sakai, Kensei Umemori, Kenji Shinoe, Masato Satoh, Masaru Sawamura
  • Journal Title: Proceedings of International Particle Accelerator Conference 2012 (IPAC2012) Volume: Vol.1
• [Journal Article] Vertical Test Results for ERL 9-cell Cavities for Compact ERL Project (2012)
  • Author(s): Kensei Umemori, Takaaki Furuya, Hiroshi Sakai, Masato Satoh, Kenji Shinoe, Masaru Sawamura, Eenrico Cenni
  • Journal Title: Proceedings of International Particle Accelerator Conference 2012 (IPAC2012) Volume: Vol.1
• [Journal Article] ERL主ライナックのためのカプラー開発 -- カプラー実機におけるエージング試験 -- (2012)
  • Author(s): 篠江憲治、阪井寛志、佐藤昌人、梅森健成、沢村勝、中村典雄、古屋貴章, Enrico Cenni
  • Journal Title: Proceedings of the 9th Annual Meeting of Particle Accelerator Society of Japan Volume: Vol.1
• [Journal Article] Overview of CW Input Coupler for ERL (2012)
  • Author(s): Hiroshi Sakai
  • Journal Title: Proceedings of 15th International Conference on RF Superconductivity 2011 (SRF2011) Volume: Vol.1
• [Journal Article] Construction of cERL Cryomodules for Injector and Main Linac (2012)
  • Author(s): Kensei Umemori, Takaaki Furuya, Eiji Kako, Shuichi Noguchi, Hiroshi Sakai, Masato Satoh, Toshio Shishido, Ken Watanabe, Yasuchika Yamamoto, Kenji Shinoe, Masaru Sawamura, Enrico Cenni
  • Journal Title: Proceedings of 15th International Conference on RF Superconductivity 2011 (SRF2011) Volume: Vol.1
• [Journal Article] Vertical Test Results on KEK-ERL 9-cell L-band Superconducting cavity (2012)
  • Author(s): Enrico Cenni, Takaaki Furuya, Hiroshi Sakai, Kensei Umemori, Kenji Shinoe, Masaru Sawamura
  • Journal Title: Proceedings of 15th International Conference on RF Superconductivity 2011 (SRF2011) Volume: Vol.1
• [Journal Article] Cooling Properties of HOM Absorber Model for cERL in Japan (2012)
  • Author(s): Masaru Sawamura, Kenji Shinoe, Takaaki Furuya, Hiroshi Sakai, Kensei Umemori, Enrico Cenni
  • Journal Title: Proceedings of 15th International Conference on RF Superconductivity 2011 (SRF2011) Volume: Vol.1
• [Journal Article] High Power Tests of KEK-ERL Input Coupler for Main Linac under LN2 Condition (2012)
  • Author(s): Hiroshi Sakai, Takaaki Furuya, Norio Nakamura, Kensei Umemori, Kenji Shinoe, Masaru Sawamura, Enrico Cenni
  • Journal Title: Proceedings of 15th International Conference on RF Superconductivity 2011 (SRF2011) Volume: Vol.1
• [Journal Article] High Power Tests of KEK-ERL Input Coupler for Main Linac under Liquid Nitrogen Condition (2011)
  • Author(s): H. Sakai, T. Furuya, N. Nakamura, K. Umemori, K. Shinoe, M. Sawamura, E. Cenni
  • Journal Title: Proc. of SRF2011, (Chicago, U.S.A) Pages: 356-360
• [Presentation] Compact ERL 周回部の現状 -高品質、大電荷ビームエネルギー回収実現に向けて- (2014)
  • Author(s): 阪井寛志, 他86人
  • Organizer: 第27回日本放射光学会年会
  • Place of Presentation: 広島
  • Year and Date: 2014-01-12
• [Presentation] Compact ERL入射器のビームコミッショニング運転 (2014)
  • Author(s): 宮島司, 阪井寛志, 他 (発表者88人中、研究代表者51番目)
  • Organizer: 第27回放射光学会年会
  • Place of Presentation: 広島、広島
• [Presentation] Compact ERL周回部の現状 (2014)
  • Author(s): 阪井寛志, 他 (発表者88人中、研究代表者1番目)
  • Organizer: 第27回放射光学会年会
  • Place of Presentation: 広島、広島
• [Presentation] cERLにおける主空洞クライオモジュール開発の現状 (2014)
  • Author(s): 梅森健成, 江波和宏, 阪井寛志, 佐藤昌史, 沢村勝, 篠江憲治, 古屋貴章, Enrico Cenni
  • Organizer: 第27回放射光学会年会
  • Place of Presentation: 広島、広島
• [Presentation] High Power CW Tests of cERL Main-Linac Cryomodule (2013)
  • Author(s): H. Sakai, K. Enami, T. Furuya, M. Sato, K. Shinoe, K. Umemori, E. Cenni, M. Sawamura
  • Organizer: 第10回日本加速器学会年会, THIOC02, SRF2013
  • Place of Presentation: Paris, France
  • Year and Date: 2013-09-26
  • Invited
• [Presentation] Comapct ERL 主加速部超伝導空洞クライオモジュールのハイパワーテスト (2013)
  • Author(s): 阪井寛志、梅森健成、江並和宏、佐藤昌史、沢村勝、篠江憲治、古屋貴章、Cenni Enrico
  • Organizer: 第10回日本加速器学会年会, MOOT09
  • Place of Presentation: 名古屋, 愛知
  • Year and Date: 2013-08-05
• [Presentation] Precise Measurement of Superconducting Cavity Movement in Cryomodule by the Position Monitor using White Light Interferometer (2013)
  • Author(s): Hiroshi Sakai, Tomohiro Aoto, Kazuhiro Enami, Takaaki Furuya, Masato Sato, Kenji Shinoe, Kensei Umemori, Masaru Sawamura, Enrico Cenni, Kyohei Hayashi, Tsutomu Kanzaki
  • Organizer: 16th International Conference on RF Superconductivity 2013 (SRF2013)
  • Place of Presentation: Paris, France
• [Presentation] High Power CW Tests of cERL Main-LINAC Cryomodule (2013)
  • Author(s): Hiroshi Sakai, Kazuhiro Enami, Takaaki Furuya, Masato Sato, Kenji Shinoe, Kensei Umemori, Masaru Sawamura, Enrico Cenni
  • Organizer: 16th International Conference on RF Superconductivity 2013 (SRF2013)
  • Place of Presentation: Paris, France
  • Invited
• [Presentation] Field Emission Measure during cERL Main LINAC Cryomodule High Power Test in KEK (2013)
  • Author(s): Enrico Cenni, Kazuhiro Enami, Takaaki Furuya, Hiroshi Sakai, Masato Sato, Kenji Shinoe, Kensei Umemori, Masaru Sawamura
  • Organizer: 16th International Conference on RF Superconductivity 2013 (SRF2013)
  • Place of Presentation: Paris, France
• [Presentation] 放射光源最前線 (2013)
  • Author(s): 阪井寛志
  • Organizer: 放射光学会第５回若手研究会
  • Place of Presentation: 柏、千葉
  • Invited
• [Presentation] ERL Main Linac実機用チューナーの低温特性試験 (2013)
  • Author(s): 江波和宏, 梅森健成, 阪井寛志, 佐藤昌史, 沢村勝, 篠江憲治, 古屋貴章, Enrico Cenni
  • Organizer: 第10回日本加速器学会年会
  • Place of Presentation: 名古屋、愛知
• [Presentation] Compact ERL主加速部超伝導空洞クライオモジュールハイパワー試験 (2013)
  • Author(s): 阪井寛志, 梅森健成, 江波和宏, 佐藤昌史, 沢村勝, 篠江憲治, 古屋貴章, Enrico Cenni
  • Organizer: 第10回日本加速器学会年会
  • Place of Presentation: 名古屋、愛知
• [Presentation] コンパクトERL入射部の建設と周回部の建設現状 (2013)
  • Author(s): 坂中章悟, 阪井寛志, 他 (発表者81人中、研究代表者47番目)
  • Organizer: 第10回日本加速器学会年会
  • Place of Presentation: 名古屋、愛知
• [Presentation] cERL主空洞の機械的振動測定 (2013)
  • Author(s): 佐藤昌史, 梅森健成, 江波和宏, 阪井寛志, 沢村勝, 篠江憲治, 古屋貴章, Enrico Cenni
  • Organizer: 第10回日本加速器学会年会
  • Place of Presentation: 名古屋、愛知
• [Presentation] cERL主空洞冷却モジュールにおける冷却時の空洞位置変位測定 (2013)
  • Author(s): 篠江憲治, 梅森健成, 江波和宏, 阪井寛志, 佐藤昌史, 沢村勝, 古屋貴章, Enrico Cenni
  • Organizer: 第10回日本加速器学会年会
  • Place of Presentation: 名古屋、愛知
• [Presentation] ERL主加速部超伝導空洞の開発 (2013)
  • Author(s): 梅森健成, 江波和宏, 阪井寛志, 佐藤昌史, 沢村勝, 篠江憲治, 古屋貴章, Enrico Cenni
  • Organizer: 第10回日本加速器学会年会
  • Place of Presentation: 名古屋、愛知
• [Presentation] Construction of Main LINAC Cryomodule for Compact ERL Project (2013)
  • Author(s): Kensei Umemori, Kazuhiro Enami, Takaaki Furuya, Hiroshi Sakai, Masato Sato, Kenji Shinoe, Masaru Sawamura, Enrico Cenni
  • Organizer: 4th International Particle Accelerator Conference 2013 (IPAC2013)
  • Place of Presentation: Shanghai, China
• [Presentation] Status of Main Linac Cryomodule Development for Compact ERL Project (2012)
  • Author(s): Kensei Umemori, Kazuhiro Enami, Takaaki Furuya, Hiroshi Sakai, Masato Satoh, Kenji Shinoe, Masaru Sawamura, Enrico Cenni
  • Organizer: International Particle Accelerator Conference 2012 (IPAC2012)
  • Place of Presentation: New Orleans, Louisiana, U.S.A
  • Invited
• [Presentation] Field Emission Simulation for KEK-ERL 9-cell Superconducting Cavity (2012)
  • Author(s): Eenrico Cenni, Takaaki Furuya, Hiroshi Sakai, Kensei Umemori, Kenji Shinoe, Masato Satoh, Masaru Sawamura
  • Organizer: International Particle Accelerator Conference 2012 (IPAC2012)
  • Place of Presentation: New Orleans, Louisiana, U.S.A
• [Presentation] Vertical Test Results for ERL 9-cell Cavities for Compact ERL Project (2012)
  • Author(s): Kensei Umemori, Takaaki Furuya, Hiroshi Sakai, Masato Satoh, Kenji Shinoe, Masaru Sawamura, Eenrico Cenni
  • Organizer: International Particle Accelerator Conference 2012 (IPAC2012)
  • Place of Presentation: New Orleans, Louisiana, U.S.A
• [Presentation] ERL主ライナックのためのカプラー開発 -- カプラー実機におけるエージング試験 -- (2012)
  • Author(s): 篠江憲治、阪井寛志、佐藤昌人、梅森健成、沢村勝、中村典雄、古屋貴章, Enrico Cenni
  • Organizer: 第９回日本加速器学会年会
  • Place of Presentation: 大阪
• [Presentation] ERL主加速部超伝導空洞の開発 (2012)
  • Author(s): 梅森健成、阪井寛志、佐藤昌人、沢村勝、篠江憲治、古屋貴章、Enrico Cenni
  • Organizer: 第25回放射光学会年会
  • Place of Presentation: 鳥栖、佐賀
• [Presentation] ERL主ライナック試作カプラー１号機のハイパワー試験 (2012)
  • Author(s): 篠江憲治、阪井寛志、梅森健成、沢村勝、中村典雄、古屋貴章、Enrico Cenni
  • Organizer: 第25回放射光学会年会
  • Place of Presentation: 鳥栖、佐賀
• [Presentation] ERL主加速部クライオモジュールの開発 (2012)
  • Author(s): 阪井寛志、梅森健成、佐藤昌人、沢村勝、篠江憲治、古屋貴章、Enrico Cenni
  • Organizer: 第25回放射光学会年会
  • Place of Presentation: 鳥栖、佐賀
• [Presentation] ERL Cryomodule Development in Japan -- Progress with SRF cavities for ERL project -- (2012)
  • Author(s): Hiroshi Sakai, Takaaki Furuya, Eiji Kako, Shuichi Noguchi, Masato Satoh, Toshio Shishido, Ken Watanabe, Yasuchika Yamamoto, Kensei Umemori, Kenji Shinoe, Masaru Sawamura, Enrico Cenni
  • Organizer: ICFA Workshop on Future Light Sources2012 (FLS2012)
  • Place of Presentation: Newport News, U.S.A
• [Presentation] ERL用超伝導加速空洞の開発 (2012)
  • Author(s): 阪井寛志, 江並和宏、古屋貴章, 加古永治, 野口修一, 佐藤昌人, 篠江憲治, 宍戸寿郎, 梅森健成, 渡辺謙,山本康史, 沢村勝, Enrico Cenni
  • Organizer: 日本物理学会 第６７回年会(招待講演)
  • Place of Presentation: 関西学院大学、兵庫
• [Presentation] Overview of CW Input Coupler for ERL (2011)
  • Author(s): H. Sakai
  • Organizer: FRIOA05, SRF2011
  • Place of Presentation: Chicago, U.S.A
  • Year and Date: 2011-07-29
  • Invited
• [Presentation] Construction of Main Linac Cryomodule for Compact ERL Project (2011)
  • Author(s): K. Umemori, T. Furuya, E. Kako, S. Noguchi, H. Sakai, M. Sato, T. Shishido, K. Watanabe, Y. Yamamoto, K. Shinoe, M. Sawamura, E. Cenni
  • Organizer: FRIOA06, SRF2011
  • Place of Presentation: Chicago, U.S.A
  • Year and Date: 2011-07-29
  • Invited
• [Presentation] Overview of CW Input Coupler for ERL (2011)
  • Author(s): Hiroshi Sakai
  • Organizer: 15th International Conference on RF Superconductivity 2011 (SRF2011)(招待講演)
  • Place of Presentation: Chicago, U.S.A
• [Presentation] Construction of cERL Cryomodules for Injector and Main Linac (2011)
  • Author(s): Kensei Umemori, Takaaki Furuya, Eiji Kako, Shuichi Noguchi, Hiroshi Sakai, Masato Satoh, Toshio Shishido, Ken Watanabe, Yasuchika Yamamoto, Kenji Shinoe, Masaru Sawamura, Enrico Cenni
  • Organizer: 15th International Conference on RF Superconductivity 2011 (SRF2011)(招待講演)
  • Place of Presentation: Chicago, U.S.A
• [Presentation] High Power Tests of KEK-ERL Input Coupler for Main Linac Under LN2 Condition (2011)
  • Author(s): Hiroshi Sakai, Takaaki Furuya, Norio Nakamura, Kensei Umemori, Kenji Shinoe, Masaru Sawamura, Enrico Cenni
  • Organizer: 15th International Conference on RF Superconductivity 2011 (SRF2011)
  • Place of Presentation: Chicago, U.S.A
• [Presentation] Vertical Test Results on KEK-ERL 9-cell L-band Superconducting cavity (2011)
  • Author(s): Enrico Cenni, Takaaki Furuya, Hiroshi Sakai, Kensei Umemori, Kenji Shinoe, Masaru Sawamura
  • Organizer: 15th International Conference on RF Superconductivity 2011 (SRF2011)
  • Place of Presentation: Chicago, U.S.A
• [Presentation] COOLING PROPERTIES OF HOM ABSORBER MODEL FOR CERL IN JAPAN (2011)
  • Author(s): Masaru Sawamura, Takaaki Furuya, Hiroshi Sakai, Kensei Umemori, Kenji Shinoe, Enrico Cenni
  • Organizer: 15th International Conference on RF Superconductivity 2011 (SRF2011)
  • Place of Presentation: Chicago, U.S.A
• [Presentation] ERL主ライナックのためのカプラー開発 -- 試作カプラー１号機におけるハイパワー試験 -- (2011)
  • Author(s): 篠江憲治、阪井寛志、梅森健成、沢村勝、中村典雄、古屋貴章,Enrico Cenni
  • Organizer: 第８回加速器学会年会
  • Place of Presentation: つくば、茨城
• [Presentation] Development of main linac cavity for cERL project (2011)
  • Author(s): Kensei Umemori, Takaaki Furuya, Hiroshi Sakai, Masato Sato, Kenji Shinoe, Masaru Sawamura , Enrico Cenni
  • Organizer: The 50th ICFA Advanced Beam Dynamics Workshop on Energy Recovery Linac (ERL2011)
  • Place of Presentation: Tsukuba, Ibaraki, Japan
• [Presentation] Development of input coupler for cERL main linac (2011)
  • Author(s): Hiroshi Sakai, Takaaki Furuya, Masato Sato, Kenji Shinoe, Kensei Umemori, Masaru Sawamura, Enrico Cenni
  • Organizer: The 50th ICFA Advanced Beam Dynamics Workshop on Energy Recovery Linac (ERL2011)
  • Place of Presentation: Tsukuba, Ibaraki, Japan
• [Presentation] Vertical test diagnostics and simulations study (2011)
  • Author(s): Enrico Cenni, Takaaki Furuya, Hiroshi Sakai, Masato Sato, Kenji Shinoe, Kensei Umemori, Masaru Sawamura
  • Organizer: The 50th ICFA Advanced Beam Dynamics Workshop on Energy Recovery Linac (ERL2011)
  • Place of Presentation: Tsukuba, Ibaraki, Japan
• [Presentation] HOM properties of main linac for cERL in Jalan (2011)
  • Author(s): Masaru Sawamura, Takaaki Furuya, Hiroshi Sakai, Masato Sato, Kenji Shinoe, Kensei Umemori, Enrico Cenni
  • Organizer: The 50th ICFA Advanced Beam Dynamics Workshop on Energy Recovery Linac (ERL2011)
  • Place of Presentation: Tsukuba, Ibaraki, Japan
• [Presentation] Performance Evaluation of KEK Tuner (2011)
  • Author(s): Kazuhiro Enami, Takaaki Furuya, Hiroshi Sakai, Masato Sato,Kenji Shinoe,Kensei Umemori, Nobuhiko Sato,
  • Organizer: The 50th ICFA Advanced Beam Dynamics Workshop on Energy Recovery Linac (ERL2011)
  • Place of Presentation: Tsukuba, Ibaraki, Japan
• [Presentation] Cryomodule of KEK-ML cavity (2011)
  • Author(s): Takaaki Furuya, Hiroshi Sakai, Kenji Shinoe, Kensei Umemori, Masaru Sawamura, Enrico Cenni
  • Organizer: The 50th ICFA Advanced Beam Dynamics Workshop on Energy Recovery Linac (ERL2011)
  • Place of Presentation: Tsukuba, Ibaraki, Japan
• [Remarks]
  • URL: http://pfwww.kek.jp/ERLoffice/