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Journal Articles

Recent progress in the energy recovery linac project in Japan

Sakanaka, Shogo*; Akemoto, Mitsuo*; Aoto, Tomohiro*; Arakawa, Dai*; Asaoka, Seiji*; Enomoto, Atsushi*; Fukuda, Shigeki*; Furukawa, Kazuro*; Furuya, Takaaki*; Haga, Kaiichi*; et al.

Proceedings of 1st International Particle Accelerator Conference (IPAC '10) (Internet), p.2338 - 2340, 2010/05

Future synchrotron light source using a 5-GeV energy recovery linac (ERL) is under proposal by our Japanese collaboration team, and we are conducting R&D efforts for that. We are developing high-brightness DC photocathode guns, two types of cryomodules for both injector and main superconducting (SC) linacs, and 1.3 GHz high CW-power RF sources. We are also constructing the Compact ERL (cERL) for demonstrating the recirculation of low-emittance, high-current beams using above-mentioned critical technologies.

Journal Articles

Design of a 500kV electron gun for ERL light source at KEK

Yamamoto, Masahiro*; Honda, Yosuke*; Miyajima, Tsukasa*; Uchiyama, Takashi*; Kobayashi, Masanori*; Muto, Toshiya*; Matsuba, Shunya*; Sakanaka, Shogo*; Sato, Kotaro*; Saito, Yoshio*; et al.

Proceedings of 6th Annual Meeting of Particle Accelerator Society of Japan (CD-ROM), p.860 - 862, 2009/08

A newly 500 kV electron gun (2nd - 500 kV gun) for an ERL light source is designed at KEK. A new concept and state of-the-art technologies of vacuum system, ceramic insulators, high voltage power supply, photocathode and preparation system will be employed. The details are described in this report.

Journal Articles

Tolerance study on RF amplitude and phase of main accelerating cavities and injection timing for the compact ERL

Nakamura, Norio*; Miyajima, Tsukasa*; Shimada, Miho*; Kobayashi, Yukinori*; Sakanaka, Shogo*; Hajima, Ryoichi

Proceedings of 6th Annual Meeting of Particle Accelerator Society of Japan (CD-ROM), p.109 - 111, 2009/08

Tolerance study on RF amplitude and phase of main accelerating cavities and injection timing was performed for the compact ERL with a simulation code "elegant". As a result, it was found that errors of the RF amplitude and phase should be controlled within 0.01% and 0.01 deg. in rms to satisfy requirements for the arrival time and the bunch length at the exit of the 1st arc section in bunch-compression mode. In high-current and low-emittance modes, these control errors can be relaxed to 0.1% and 0.1deg. The injection timing error is allowed up to at least 200 fs, which does not deteriorate the beam quality at the exit of the 1st arc section in all the operation modes.

Journal Articles

Recent progress of construction for compact Energy Recover Linac

Kobayashi, Yukinori*; Sakanaka, Shogo*; Sato, Kotaro*; Kasuga, Toshio*; Kawata, Hiroshi*; Hajima, Ryoichi; Nakamura, Norio*

Proceedings of 6th Annual Meeting of Particle Accelerator Society of Japan (CD-ROM), p.66 - 69, 2009/08

Future synchrotron light source based on the Energy Recovery Linac (ERL) is expected to be capable of producing super-brilliant and/or ultra-short pulses of synchrotron radiation with a potential of the oscillating type for X-ray free electron laser. We are constructing the R&D machine which is called the compact ERL including the developments of an ultra-low emittance electron gun and superconducting cavities for both the injector and the main linacs under the collaboration between KEK, JAEA, ISSP, and other institutes. In this paper, we report recent progress of the construction for the compact ERL with a repair of a KEK east counter hall.

Journal Articles

Research and development for future ERL light sources and construction of the compact ERL

Hajima, Ryoichi; Nakamura, Norio*; Sakanaka, Shogo*; Kobayashi, Yukinori*

Kasokuki, 6(2), p.149 - 157, 2009/07

Energy-recovery linac (ERL), which produces a small-emittance beam with high-average current, is a promising device for future light sources. In Japan, we have organized a collaboration team toward future ERL light sources and started R&D efforts to establish accelerator technologies for the ERL light sources. In this paper, we describe status of accelerator components R&D's and on-going construction of a test facility, the compact ERL.

Journal Articles

Progress in R&D efforts on the energy recovery linac in Japan

Sakanaka, Shogo*; Ago, Tomonori*; Enomoto, Atsushi*; Fukuda, Shigeki*; Furukawa, Kazuro*; Furuya, Takaaki*; Haga, Kaiichi*; Harada, Kentaro*; Hiramatsu, Shigenori*; Honda, Toru*; et al.

Proceedings of 11th European Particle Accelerator Conference (EPAC '08) (CD-ROM), p.205 - 207, 2008/06

Future synchrotron light sources based on the energy-recovery linacs (ERLs) are expected to be capable of producing super-brilliant and/or ultra-short pulses of synchrotron radiation. Our Japanese collaboration team is making efforts for realizing an ERL-based hard X-ray source. We report recent progress in our R&D efforts.

JAEA Reports

Design study of the compact ERL

Hajima, Ryoichi; Nakamura, Norio*; Sakanaka, Shogo*; Kobayashi, Yukinori*

JAEA-Research 2008-032, 188 Pages, 2008/02

JAEA-Research-2008-032.pdf:23.41MB

Energy-recovery linac (ERL) is a promising device for future X-ray light sources. In Japan, we organized a Japanese ERL collaboration team, consisting of the members of KEK, JAEA, ISSP and other laboratories, and then, started R&D efforts for the future ERL light source. In order to demonstrate accelerator technologies relevant to the ERL light source, we have decided to build a small facility, Compact ERL. This report presents a design study of the Compact ERL, which includes R&D issues for each accelerator component, studies on beam dynamics, performance of the Compact ERL as a light source of THz and X-ray.

Journal Articles

Status of R&D efforts toward the ERL-based light source

Sakanaka, Shogo*; Kobayashi, Yukinori*; Sato, Kotaro*; Kasuga, Toshio*; Kawata, Hiroshi*; Hajima, Ryoichi; Nakamura, Norio*

Proceedings of 5th Annual Meeting of Particle Accelerator Society of Japan and 33rd Linear Accelerator Meeting in Japan (CD-ROM), p.225 - 227, 2008/00

Collaborative research efforts towards future ERL-based light sources are carried out. We present the R&D status of an electron gun and superconducting cavities, updated design study on the test facility (Compact ERL).

Journal Articles

Design study of the compact ERL optics

Shiraga, Takashi*; Nakamura, Norio*; Harada, Kentaro*; Shimada, Miho*; Sakanaka, Shogo*; Kobayashi, Yukinori*; Hajima, Ryoichi

Proceedings of 5th Annual Meeting of Particle Accelerator Society of Japan and 33rd Linear Accelerator Meeting in Japan (CD-ROM), p.589 - 591, 2008/00

An energy recovery linac (ERL) is expected to be the next generation synchrotron radiation source that can provide synchrotron radiation of higher brilliance, shorter pulse and higher coherence than the existing third-generation synchrotron light sources. The compact ERL is planned to be constructed in order to solve some problems in achievement of such synchrotron radiation and to confirm advantages of ERLs. We studied and optimized the compact ERL optics to achieve subpico-second bunch generation and efficient energy recovery and to transport the beam to the beam dump without serious beam loss. The design study of the compact ERL optics was done by using the simulation code Elegant. As a result, we succeeded in obtaining a 40-fs bunch with a charge of 77 pC just after the first TBA cell. Furthermore we could suppress the maximum beam size to less than 8.5 mm even after deceleration.

Oral presentation

R&D status of the ERL project in Japan

Sakanaka, Shogo*; Kobayashi, Yukinori*; Hajima, Ryoichi; Nakamura, Norio*

no journal, , 

A collaborative effort towards a future ERL light source is carried out by JAEA, KEK and ISSP. We present recent results of the ERL project, which includes development of ERL components and design studies of a compact ERL.

Oral presentation

Stsatus of the ERL light source project

Hajima, Ryoichi; Kawata, Hiroshi*; Kasuga, Toshio*; Sato, Kotaro*; Nakamura, Norio*; Sakanaka, Shogo*; Kobayashi, Yukinori*

no journal, , 

no abstracts in English

Oral presentation

Electron beam optics in the compact ERL

Hajima, Ryoichi; Shiraga, Takashi*; Nakamura, Norio*; Harada, Kentaro*; Shimada, Miho*; Sakanaka, Shogo*; Kobayashi, Yukinori*

no journal, , 

no abstracts in English

Oral presentation

Study of beam dynamics in the compact ERL injector

Hajima, Ryoichi; Miyajima, Tsukasa*; Kobayashi, Yukinori*; Sakanaka, Shogo*

no journal, , 

no abstracts in English

Oral presentation

Development status of the ERL light source

Hajima, Ryoichi; Sakanaka, Shogo*; Kobayashi, Yukinori*; Kasuga, Toshio*; Sato, Kotaro*; Kawata, Hiroshi*; Nakamura, Norio*

no journal, , 

no abstracts in English

Oral presentation

Simulation of a small-emittance beam for the cERL injector

Hajima, Ryoichi; Miyajima, Tsukasa*; Kobayashi, Yukinori*; Sakanaka, Shogo*; Shimada, Miho*

no journal, , 

no abstracts in English

Oral presentation

Design study of beam optics in the compact ERL

Hajima, Ryoichi; Shiraga, Takashi*; Harada, Kentaro*; Shimada, Miho*; Sakanaka, Shogo*; Kobayashi, Yukinori*; Nakamura, Norio*

no journal, , 

no abstracts in English

Oral presentation

Proposal of a $$gamma$$-ray NDA experiment at the Compact ERL

Hajima, Ryoichi; Hayakawa, Takehito; Seya, Michio; Kawata, Hiroshi*; Kobayashi, Yukinori*; Urakawa, Junji*

no journal, , 

no abstracts in English

Oral presentation

Alteration of organic compounds of interstellar origin in the solar system; Simulation experiments on the ground and in space

Kobayashi, Kensei*; Kawamoto, Yukinori*; Sarker, P. K.*; Ono, Keisuke*; Kuwahara, Hideharu*; Obayashi, Yumiko*; Kaneko, Takeo*; Mita, Hajime*; Yabuta, Hikaru*; Yoshida, Satoshi*; et al.

no journal, , 

Oral presentation

Evaluation of Stability of biologically-relevant molecules in interplanetary environment; Ground simulation and space experimental plan

Kobayashi, Kensei*; Kawamoto, Yukinori*; Okabe, Takuto*; Sarker, P. K.*; Obayashi, Yumiko*; Kaneko, Takeo*; Mita, Hajime*; Kanda, Kazuhiro*; Yoshida, Satoshi*; Narumi, Issei

no journal, , 

no abstracts in English

Oral presentation

Alteration of amino acid precursors in the solar system; Simulation experiments on the ground and in space

Kobayashi, Kensei*; Kawamoto, Yukinori*; Sarker, P. K.*; Kuwahara, Hideharu*; Obayashi, Yumiko*; Kaneko, Takeo*; Mita, Hajime*; Yabuta, Hikaru*; Yoshida, Satoshi*; Narumi, Issei; et al.

no journal, , 

no abstracts in English

Oral presentation

Tanpopo Working Group report; Space exposure of microbes and organic materials

Yokobori, Shinichi*; Kobayashi, Kensei*; Mita, Hajime*; Yabuta, Hikaru*; Nakagawa, Kazumichi*; Narumi, Issei; Hayashi, Nobuhiro*; Tomita, Kaori*; Kawaguchi, Yuko*; Shimizu, Yasuyuki*; et al.

no journal, , 

no abstracts in English

21 (Records 1-20 displayed on this page)