ERL2015 - List of Authors (Michizono, S.)

Paper	Title	Page
MOPCTH010	Design Work of the ERL-FEL as the High Intense EUV Light Source	4
	N. Nakamura, S. Chen, T. Furuya, K. Haga, I. Hanyu, K. Harada, T. Honda, Y. Honda, E. Kako, Y. Kamiya, R. Kato, H. Kawata, Y. Kobayashi, T. Konomi, T. Kubo, S. Michizono, T. Miyajima, H. Nakai, T. Obina, K. Oide, H. Sakai, S. Sakanaka, M. Shimada, K. Tsuchiya, K. Umemori, M. Yamamoto KEK, Ibaraki, Japan R. Hajima, N. Nishimori JAEA, Ibaraki-ken, Japan
	Energy recovery linac(ERL)-based free electron lasers(FELs) are promising candidates for high-power EUV sources. They can recover most acceleration energy from the electron beams and greatly reduce the dumped beam power and activation compared with those based on ordinary linear accelerators. We have investigated a feasible design of a 10-kW class ERL-FEL operated at 13.5 nm for EUV lithography applications. In this talk, we will present the design work of the ERL-FEL as the high-power EUV source.
	Slides MOPCTH010 [4.589 MB]
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEIBLH2054	Operational Experience of CW SRF Injector and Main Linac Cryomodules at the Compact ERL	63
	H. Sakai, K. Enami, T. Furuya, E. Kako, Y. Kondo, S. Michizono, T. Miura, F. Qiu, M. Sato, K. Shinoe, T. Shishido, K. Umemori, K. Watanabe, Y. Yamamoto KEK, Ibaraki, Japan E. Cenni Sokendai, Ibaraki, Japan M. Sawamura JAEA, Ibaraki-ken, Japan
	We developed ERL injector cryomodule and main linac for Compact ERL (cERL) project. The injector cryomodule includes three 2-cell L-band superconducting cavities. The main linac cryomodule includes two 9-cell L-band superconducting cavities. After construction of cERL injector and recirculaton loop, beam operation was started with 20 MeV beam and after precise beam tuning, energy recovery operation was achieved with more than 80uA. Injector and main linac cavity were stable for ERL beam operation with Digital LLRF system. Field emission is the severe problem for main linac and heating of HOM coupler is the problem for injector. We mainly describe the cavity performances of two cERL cryomodules during long-term beam operation.
	Slides WEIBLH2054 [13.191 MB]
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEIDLH2066	Performance of the Digital LLRF Systems at KEK cERL	84
	F. Qiu, D.A. Arakawa, Y. Honda, H. Katagiri, T. Matsumoto, S. Michizono, T. Miura, T. Obina, H. Sakai KEK, Ibaraki, Japan S.B. Wibowo Sokendai, Ibaraki, Japan
	A compact energy recovery linac (cERL), which is a test machine for the next generation synchrotron light source 3-GeV ERL, was constructed at KEK. In the cERL, a normal conducting (NC) buncher cavity and three superconducting (SC) two-cell cavities were installed for the injector, and two nine-cell SC cavities were installed for the main linac (ML). The radio-frequency (RF) fluctuations for each cavity are required to be maintained at less than 0.1% rms in amplitude and 0.1° in phase. These requirements are fulfilled by applying digital low-level radio-frequency (LLRF) systems. During the beam-commissioning, the LLRF systems were evaluated and validated. A measured beam momentum jitter of 0.006% shows that the target of the LLRF systems is achieved. To further improve the system performance, an adaptive feedforward (FF) control-based approach was proposed and demonstrated in the beam-commissioning. The current status of LLRF system and the adaptive FF approach for LLRF control in the cERL are presented in this paper.
	Slides WEIDLH2066 [5.130 MB]
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Design Work of the ERL-FEL as the High Intense EUV Light Source

4

N. Nakamura, S. Chen, T. Furuya, K. Haga, I. Hanyu, K. Harada, T. Honda, Y. Honda, E. Kako, Y. Kamiya, R. Kato, H. Kawata, Y. Kobayashi, T. Konomi, T. Kubo, S. Michizono, T. Miyajima, H. Nakai, T. Obina, K. Oide, H. Sakai, S. Sakanaka, M. Shimada, K. Tsuchiya, K. Umemori, M. Yamamoto
KEK, Ibaraki, Japan
R. Hajima, N. Nishimori
JAEA, Ibaraki-ken, Japan

Energy recovery linac(ERL)-based free electron lasers(FELs) are promising candidates for high-power EUV sources. They can recover most acceleration energy from the electron beams and greatly reduce the dumped beam power and activation compared with those based on ordinary linear accelerators. We have investigated a feasible design of a 10-kW class ERL-FEL operated at 13.5 nm for EUV lithography applications. In this talk, we will present the design work of the ERL-FEL as the high-power EUV source.

Slides MOPCTH010 [4.589 MB]

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEIBLH2054

Operational Experience of CW SRF Injector and Main Linac Cryomodules at the Compact ERL

63

H. Sakai, K. Enami, T. Furuya, E. Kako, Y. Kondo, S. Michizono, T. Miura, F. Qiu, M. Sato, K. Shinoe, T. Shishido, K. Umemori, K. Watanabe, Y. Yamamoto
KEK, Ibaraki, Japan
E. Cenni
Sokendai, Ibaraki, Japan
M. Sawamura
JAEA, Ibaraki-ken, Japan

We developed ERL injector cryomodule and main linac for Compact ERL (cERL) project. The injector cryomodule includes three 2-cell L-band superconducting cavities. The main linac cryomodule includes two 9-cell L-band superconducting cavities. After construction of cERL injector and recirculaton loop, beam operation was started with 20 MeV beam and after precise beam tuning, energy recovery operation was achieved with more than 80uA. Injector and main linac cavity were stable for ERL beam operation with Digital LLRF system. Field emission is the severe problem for main linac and heating of HOM coupler is the problem for injector. We mainly describe the cavity performances of two cERL cryomodules during long-term beam operation.

Slides WEIBLH2054 [13.191 MB]

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEIDLH2066

Performance of the Digital LLRF Systems at KEK cERL

84

F. Qiu, D.A. Arakawa, Y. Honda, H. Katagiri, T. Matsumoto, S. Michizono, T. Miura, T. Obina, H. Sakai
KEK, Ibaraki, Japan
S.B. Wibowo
Sokendai, Ibaraki, Japan

A compact energy recovery linac (cERL), which is a test machine for the next generation synchrotron light source 3-GeV ERL, was constructed at KEK. In the cERL, a normal conducting (NC) buncher cavity and three superconducting (SC) two-cell cavities were installed for the injector, and two nine-cell SC cavities were installed for the main linac (ML). The radio-frequency (RF) fluctuations for each cavity are required to be maintained at less than 0.1% rms in amplitude and 0.1° in phase. These requirements are fulfilled by applying digital low-level radio-frequency (LLRF) systems. During the beam-commissioning, the LLRF systems were evaluated and validated. A measured beam momentum jitter of 0.006% shows that the target of the LLRF systems is achieved. To further improve the system performance, an adaptive feedforward (FF) control-based approach was proposed and demonstrated in the beam-commissioning. The current status of LLRF system and the adaptive FF approach for LLRF control in the cERL are presented in this paper.

Slides WEIDLH2066 [5.130 MB]

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)