Abstract

We report for the first time to our knowledge the experimental realization of a storage ring free-electron laser (FEL) in the middle-infrared (MIR) region. A technique to adjust the optical cavity using higher harmonic FELs was developed for a fundamental FEL in the MIR region. The MIR FELs were oscillated in the wavelength region of 2475 to 2673nm, and the relative linewidth was 5×104. A quasi-monochromatic x-ray beam with an energy of 700keV was generated using FEL Compton backscattering. We were able to realize a quasi-monochromatic x-ray beam, whose energy is difficult to generate even in advanced synchrotron radiation facilities.

© 2011 Optical Society of America

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  1. A. Bessiere, C. Marcel, M. Morcrette, J-M. Tarascon, V. Lucas, B. Viana, and N. Baffier, J. Appl. Phys. 91, 1589 (2002).
    [CrossRef]
  2. Z. Liu, L. C. Feldman, N. H. Tolk, Z. Zhang, and P. I. Cohen, Science 312, 1024 (2006).
    [CrossRef] [PubMed]
  3. G. S. Edwards, Laser Photon. Rev. 3, 545 (2009).
    [CrossRef]
  4. N. Sei, H. Ohgaki, T. Mikado, and K. Yamada, Jpn. J. Appl. Phys. 41, 1595 (2002).
    [CrossRef]
  5. N. Sei, H. Ogawa, and K. Yamada, Opt. Lett. 34, 1843 (2009).
    [CrossRef] [PubMed]
  6. N. Sei, H. Ogawa, and K. Yamada, J. Phys. Soc. Jpn. 79, 093501 (2010).
    [CrossRef]
  7. S. H. Park, V. N. Litvinenko, W. Tornow, and C. Montgomery, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 475, 425 (2001).
    [CrossRef]
  8. N. Sei, H. Ogawa, and K. Yamada are preparing a manuscript to be called “Characteristics of inverse Compton x-rays generated inside the NIJI-IV free electron laser oscillations.”
  9. N. Sei, K. Yamada, H. Ogawa, and M. Yasumoto, Infrared Phys. Technol. 51, 375 (2008).
    [CrossRef]
  10. R. Bruckner, J. Non-Cryst. Solids 5, 123 (1970).
    [CrossRef]
  11. K. Yamada, T. Yamazaki, N. Sei, R. Suzuki, T. Ohdaira, T. Shimizu, M. Kawai, M. Yokoyama, T. Mikado, T. Noguchi, S. Sugiyama, and H. Ohgaki, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 393, 44 (1997).
    [CrossRef]
  12. M. E. Couprie, C. Bazin, M. Bergher, M. Billardon, P. Elleaume, J. M. Ortega, Y. Petroff, R. Prazeres, and M. Velghe, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 282, 455 (1989).
    [CrossRef]
  13. S. Kimura, E. Nakamura, T. Nishi, Y. Sakurai, K. Hayashi, J. Yamazaki, and M. Katoh, Infrared Phys. Technol. 49, 147 (2006).
    [CrossRef]

2010 (1)

N. Sei, H. Ogawa, and K. Yamada, J. Phys. Soc. Jpn. 79, 093501 (2010).
[CrossRef]

2009 (2)

2008 (1)

N. Sei, K. Yamada, H. Ogawa, and M. Yasumoto, Infrared Phys. Technol. 51, 375 (2008).
[CrossRef]

2006 (2)

Z. Liu, L. C. Feldman, N. H. Tolk, Z. Zhang, and P. I. Cohen, Science 312, 1024 (2006).
[CrossRef] [PubMed]

S. Kimura, E. Nakamura, T. Nishi, Y. Sakurai, K. Hayashi, J. Yamazaki, and M. Katoh, Infrared Phys. Technol. 49, 147 (2006).
[CrossRef]

2002 (2)

A. Bessiere, C. Marcel, M. Morcrette, J-M. Tarascon, V. Lucas, B. Viana, and N. Baffier, J. Appl. Phys. 91, 1589 (2002).
[CrossRef]

N. Sei, H. Ohgaki, T. Mikado, and K. Yamada, Jpn. J. Appl. Phys. 41, 1595 (2002).
[CrossRef]

2001 (1)

S. H. Park, V. N. Litvinenko, W. Tornow, and C. Montgomery, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 475, 425 (2001).
[CrossRef]

1997 (1)

K. Yamada, T. Yamazaki, N. Sei, R. Suzuki, T. Ohdaira, T. Shimizu, M. Kawai, M. Yokoyama, T. Mikado, T. Noguchi, S. Sugiyama, and H. Ohgaki, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 393, 44 (1997).
[CrossRef]

1989 (1)

M. E. Couprie, C. Bazin, M. Bergher, M. Billardon, P. Elleaume, J. M. Ortega, Y. Petroff, R. Prazeres, and M. Velghe, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 282, 455 (1989).
[CrossRef]

1970 (1)

R. Bruckner, J. Non-Cryst. Solids 5, 123 (1970).
[CrossRef]

Baffier, N.

A. Bessiere, C. Marcel, M. Morcrette, J-M. Tarascon, V. Lucas, B. Viana, and N. Baffier, J. Appl. Phys. 91, 1589 (2002).
[CrossRef]

Bazin, C.

M. E. Couprie, C. Bazin, M. Bergher, M. Billardon, P. Elleaume, J. M. Ortega, Y. Petroff, R. Prazeres, and M. Velghe, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 282, 455 (1989).
[CrossRef]

Bergher, M.

M. E. Couprie, C. Bazin, M. Bergher, M. Billardon, P. Elleaume, J. M. Ortega, Y. Petroff, R. Prazeres, and M. Velghe, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 282, 455 (1989).
[CrossRef]

Bessiere, A.

A. Bessiere, C. Marcel, M. Morcrette, J-M. Tarascon, V. Lucas, B. Viana, and N. Baffier, J. Appl. Phys. 91, 1589 (2002).
[CrossRef]

Billardon, M.

M. E. Couprie, C. Bazin, M. Bergher, M. Billardon, P. Elleaume, J. M. Ortega, Y. Petroff, R. Prazeres, and M. Velghe, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 282, 455 (1989).
[CrossRef]

Bruckner, R.

R. Bruckner, J. Non-Cryst. Solids 5, 123 (1970).
[CrossRef]

Cohen, P. I.

Z. Liu, L. C. Feldman, N. H. Tolk, Z. Zhang, and P. I. Cohen, Science 312, 1024 (2006).
[CrossRef] [PubMed]

Couprie, M. E.

M. E. Couprie, C. Bazin, M. Bergher, M. Billardon, P. Elleaume, J. M. Ortega, Y. Petroff, R. Prazeres, and M. Velghe, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 282, 455 (1989).
[CrossRef]

Edwards, G. S.

G. S. Edwards, Laser Photon. Rev. 3, 545 (2009).
[CrossRef]

Elleaume, P.

M. E. Couprie, C. Bazin, M. Bergher, M. Billardon, P. Elleaume, J. M. Ortega, Y. Petroff, R. Prazeres, and M. Velghe, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 282, 455 (1989).
[CrossRef]

Feldman, L. C.

Z. Liu, L. C. Feldman, N. H. Tolk, Z. Zhang, and P. I. Cohen, Science 312, 1024 (2006).
[CrossRef] [PubMed]

Hayashi, K.

S. Kimura, E. Nakamura, T. Nishi, Y. Sakurai, K. Hayashi, J. Yamazaki, and M. Katoh, Infrared Phys. Technol. 49, 147 (2006).
[CrossRef]

Katoh, M.

S. Kimura, E. Nakamura, T. Nishi, Y. Sakurai, K. Hayashi, J. Yamazaki, and M. Katoh, Infrared Phys. Technol. 49, 147 (2006).
[CrossRef]

Kawai, M.

K. Yamada, T. Yamazaki, N. Sei, R. Suzuki, T. Ohdaira, T. Shimizu, M. Kawai, M. Yokoyama, T. Mikado, T. Noguchi, S. Sugiyama, and H. Ohgaki, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 393, 44 (1997).
[CrossRef]

Kimura, S.

S. Kimura, E. Nakamura, T. Nishi, Y. Sakurai, K. Hayashi, J. Yamazaki, and M. Katoh, Infrared Phys. Technol. 49, 147 (2006).
[CrossRef]

Litvinenko, V. N.

S. H. Park, V. N. Litvinenko, W. Tornow, and C. Montgomery, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 475, 425 (2001).
[CrossRef]

Liu, Z.

Z. Liu, L. C. Feldman, N. H. Tolk, Z. Zhang, and P. I. Cohen, Science 312, 1024 (2006).
[CrossRef] [PubMed]

Lucas, V.

A. Bessiere, C. Marcel, M. Morcrette, J-M. Tarascon, V. Lucas, B. Viana, and N. Baffier, J. Appl. Phys. 91, 1589 (2002).
[CrossRef]

Marcel, C.

A. Bessiere, C. Marcel, M. Morcrette, J-M. Tarascon, V. Lucas, B. Viana, and N. Baffier, J. Appl. Phys. 91, 1589 (2002).
[CrossRef]

Mikado, T.

N. Sei, H. Ohgaki, T. Mikado, and K. Yamada, Jpn. J. Appl. Phys. 41, 1595 (2002).
[CrossRef]

K. Yamada, T. Yamazaki, N. Sei, R. Suzuki, T. Ohdaira, T. Shimizu, M. Kawai, M. Yokoyama, T. Mikado, T. Noguchi, S. Sugiyama, and H. Ohgaki, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 393, 44 (1997).
[CrossRef]

Montgomery, C.

S. H. Park, V. N. Litvinenko, W. Tornow, and C. Montgomery, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 475, 425 (2001).
[CrossRef]

Morcrette, M.

A. Bessiere, C. Marcel, M. Morcrette, J-M. Tarascon, V. Lucas, B. Viana, and N. Baffier, J. Appl. Phys. 91, 1589 (2002).
[CrossRef]

Nakamura, E.

S. Kimura, E. Nakamura, T. Nishi, Y. Sakurai, K. Hayashi, J. Yamazaki, and M. Katoh, Infrared Phys. Technol. 49, 147 (2006).
[CrossRef]

Nishi, T.

S. Kimura, E. Nakamura, T. Nishi, Y. Sakurai, K. Hayashi, J. Yamazaki, and M. Katoh, Infrared Phys. Technol. 49, 147 (2006).
[CrossRef]

Noguchi, T.

K. Yamada, T. Yamazaki, N. Sei, R. Suzuki, T. Ohdaira, T. Shimizu, M. Kawai, M. Yokoyama, T. Mikado, T. Noguchi, S. Sugiyama, and H. Ohgaki, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 393, 44 (1997).
[CrossRef]

Ogawa, H.

N. Sei, H. Ogawa, and K. Yamada, J. Phys. Soc. Jpn. 79, 093501 (2010).
[CrossRef]

N. Sei, H. Ogawa, and K. Yamada, Opt. Lett. 34, 1843 (2009).
[CrossRef] [PubMed]

N. Sei, K. Yamada, H. Ogawa, and M. Yasumoto, Infrared Phys. Technol. 51, 375 (2008).
[CrossRef]

N. Sei, H. Ogawa, and K. Yamada are preparing a manuscript to be called “Characteristics of inverse Compton x-rays generated inside the NIJI-IV free electron laser oscillations.”

Ohdaira, T.

K. Yamada, T. Yamazaki, N. Sei, R. Suzuki, T. Ohdaira, T. Shimizu, M. Kawai, M. Yokoyama, T. Mikado, T. Noguchi, S. Sugiyama, and H. Ohgaki, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 393, 44 (1997).
[CrossRef]

Ohgaki, H.

N. Sei, H. Ohgaki, T. Mikado, and K. Yamada, Jpn. J. Appl. Phys. 41, 1595 (2002).
[CrossRef]

K. Yamada, T. Yamazaki, N. Sei, R. Suzuki, T. Ohdaira, T. Shimizu, M. Kawai, M. Yokoyama, T. Mikado, T. Noguchi, S. Sugiyama, and H. Ohgaki, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 393, 44 (1997).
[CrossRef]

Ortega, J. M.

M. E. Couprie, C. Bazin, M. Bergher, M. Billardon, P. Elleaume, J. M. Ortega, Y. Petroff, R. Prazeres, and M. Velghe, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 282, 455 (1989).
[CrossRef]

Park, S. H.

S. H. Park, V. N. Litvinenko, W. Tornow, and C. Montgomery, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 475, 425 (2001).
[CrossRef]

Petroff, Y.

M. E. Couprie, C. Bazin, M. Bergher, M. Billardon, P. Elleaume, J. M. Ortega, Y. Petroff, R. Prazeres, and M. Velghe, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 282, 455 (1989).
[CrossRef]

Prazeres, R.

M. E. Couprie, C. Bazin, M. Bergher, M. Billardon, P. Elleaume, J. M. Ortega, Y. Petroff, R. Prazeres, and M. Velghe, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 282, 455 (1989).
[CrossRef]

Sakurai, Y.

S. Kimura, E. Nakamura, T. Nishi, Y. Sakurai, K. Hayashi, J. Yamazaki, and M. Katoh, Infrared Phys. Technol. 49, 147 (2006).
[CrossRef]

Sei, N.

N. Sei, H. Ogawa, and K. Yamada, J. Phys. Soc. Jpn. 79, 093501 (2010).
[CrossRef]

N. Sei, H. Ogawa, and K. Yamada, Opt. Lett. 34, 1843 (2009).
[CrossRef] [PubMed]

N. Sei, K. Yamada, H. Ogawa, and M. Yasumoto, Infrared Phys. Technol. 51, 375 (2008).
[CrossRef]

N. Sei, H. Ohgaki, T. Mikado, and K. Yamada, Jpn. J. Appl. Phys. 41, 1595 (2002).
[CrossRef]

K. Yamada, T. Yamazaki, N. Sei, R. Suzuki, T. Ohdaira, T. Shimizu, M. Kawai, M. Yokoyama, T. Mikado, T. Noguchi, S. Sugiyama, and H. Ohgaki, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 393, 44 (1997).
[CrossRef]

N. Sei, H. Ogawa, and K. Yamada are preparing a manuscript to be called “Characteristics of inverse Compton x-rays generated inside the NIJI-IV free electron laser oscillations.”

Shimizu, T.

K. Yamada, T. Yamazaki, N. Sei, R. Suzuki, T. Ohdaira, T. Shimizu, M. Kawai, M. Yokoyama, T. Mikado, T. Noguchi, S. Sugiyama, and H. Ohgaki, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 393, 44 (1997).
[CrossRef]

Sugiyama, S.

K. Yamada, T. Yamazaki, N. Sei, R. Suzuki, T. Ohdaira, T. Shimizu, M. Kawai, M. Yokoyama, T. Mikado, T. Noguchi, S. Sugiyama, and H. Ohgaki, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 393, 44 (1997).
[CrossRef]

Suzuki, R.

K. Yamada, T. Yamazaki, N. Sei, R. Suzuki, T. Ohdaira, T. Shimizu, M. Kawai, M. Yokoyama, T. Mikado, T. Noguchi, S. Sugiyama, and H. Ohgaki, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 393, 44 (1997).
[CrossRef]

Tarascon, J-M.

A. Bessiere, C. Marcel, M. Morcrette, J-M. Tarascon, V. Lucas, B. Viana, and N. Baffier, J. Appl. Phys. 91, 1589 (2002).
[CrossRef]

Tolk, N. H.

Z. Liu, L. C. Feldman, N. H. Tolk, Z. Zhang, and P. I. Cohen, Science 312, 1024 (2006).
[CrossRef] [PubMed]

Tornow, W.

S. H. Park, V. N. Litvinenko, W. Tornow, and C. Montgomery, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 475, 425 (2001).
[CrossRef]

Velghe, M.

M. E. Couprie, C. Bazin, M. Bergher, M. Billardon, P. Elleaume, J. M. Ortega, Y. Petroff, R. Prazeres, and M. Velghe, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 282, 455 (1989).
[CrossRef]

Viana, B.

A. Bessiere, C. Marcel, M. Morcrette, J-M. Tarascon, V. Lucas, B. Viana, and N. Baffier, J. Appl. Phys. 91, 1589 (2002).
[CrossRef]

Yamada, K.

N. Sei, H. Ogawa, and K. Yamada, J. Phys. Soc. Jpn. 79, 093501 (2010).
[CrossRef]

N. Sei, H. Ogawa, and K. Yamada, Opt. Lett. 34, 1843 (2009).
[CrossRef] [PubMed]

N. Sei, K. Yamada, H. Ogawa, and M. Yasumoto, Infrared Phys. Technol. 51, 375 (2008).
[CrossRef]

N. Sei, H. Ohgaki, T. Mikado, and K. Yamada, Jpn. J. Appl. Phys. 41, 1595 (2002).
[CrossRef]

K. Yamada, T. Yamazaki, N. Sei, R. Suzuki, T. Ohdaira, T. Shimizu, M. Kawai, M. Yokoyama, T. Mikado, T. Noguchi, S. Sugiyama, and H. Ohgaki, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 393, 44 (1997).
[CrossRef]

N. Sei, H. Ogawa, and K. Yamada are preparing a manuscript to be called “Characteristics of inverse Compton x-rays generated inside the NIJI-IV free electron laser oscillations.”

Yamazaki, J.

S. Kimura, E. Nakamura, T. Nishi, Y. Sakurai, K. Hayashi, J. Yamazaki, and M. Katoh, Infrared Phys. Technol. 49, 147 (2006).
[CrossRef]

Yamazaki, T.

K. Yamada, T. Yamazaki, N. Sei, R. Suzuki, T. Ohdaira, T. Shimizu, M. Kawai, M. Yokoyama, T. Mikado, T. Noguchi, S. Sugiyama, and H. Ohgaki, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 393, 44 (1997).
[CrossRef]

Yasumoto, M.

N. Sei, K. Yamada, H. Ogawa, and M. Yasumoto, Infrared Phys. Technol. 51, 375 (2008).
[CrossRef]

Yokoyama, M.

K. Yamada, T. Yamazaki, N. Sei, R. Suzuki, T. Ohdaira, T. Shimizu, M. Kawai, M. Yokoyama, T. Mikado, T. Noguchi, S. Sugiyama, and H. Ohgaki, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 393, 44 (1997).
[CrossRef]

Zhang, Z.

Z. Liu, L. C. Feldman, N. H. Tolk, Z. Zhang, and P. I. Cohen, Science 312, 1024 (2006).
[CrossRef] [PubMed]

Infrared Phys. Technol. (2)

N. Sei, K. Yamada, H. Ogawa, and M. Yasumoto, Infrared Phys. Technol. 51, 375 (2008).
[CrossRef]

S. Kimura, E. Nakamura, T. Nishi, Y. Sakurai, K. Hayashi, J. Yamazaki, and M. Katoh, Infrared Phys. Technol. 49, 147 (2006).
[CrossRef]

J. Appl. Phys. (1)

A. Bessiere, C. Marcel, M. Morcrette, J-M. Tarascon, V. Lucas, B. Viana, and N. Baffier, J. Appl. Phys. 91, 1589 (2002).
[CrossRef]

J. Non-Cryst. Solids (1)

R. Bruckner, J. Non-Cryst. Solids 5, 123 (1970).
[CrossRef]

J. Phys. Soc. Jpn. (1)

N. Sei, H. Ogawa, and K. Yamada, J. Phys. Soc. Jpn. 79, 093501 (2010).
[CrossRef]

Jpn. J. Appl. Phys. (1)

N. Sei, H. Ohgaki, T. Mikado, and K. Yamada, Jpn. J. Appl. Phys. 41, 1595 (2002).
[CrossRef]

Laser Photon. Rev. (1)

G. S. Edwards, Laser Photon. Rev. 3, 545 (2009).
[CrossRef]

Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. (3)

S. H. Park, V. N. Litvinenko, W. Tornow, and C. Montgomery, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 475, 425 (2001).
[CrossRef]

K. Yamada, T. Yamazaki, N. Sei, R. Suzuki, T. Ohdaira, T. Shimizu, M. Kawai, M. Yokoyama, T. Mikado, T. Noguchi, S. Sugiyama, and H. Ohgaki, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 393, 44 (1997).
[CrossRef]

M. E. Couprie, C. Bazin, M. Bergher, M. Billardon, P. Elleaume, J. M. Ortega, Y. Petroff, R. Prazeres, and M. Velghe, Nucl. Instrum. Methods Phys. Res., A Accel. Spectrom. Detect. Assoc. Equip. 282, 455 (1989).
[CrossRef]

Opt. Lett. (1)

Science (1)

Z. Liu, L. C. Feldman, N. H. Tolk, Z. Zhang, and P. I. Cohen, Science 312, 1024 (2006).
[CrossRef] [PubMed]

Other (1)

N. Sei, H. Ogawa, and K. Yamada are preparing a manuscript to be called “Characteristics of inverse Compton x-rays generated inside the NIJI-IV free electron laser oscillations.”

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Figures (5)

Fig. 1
Fig. 1

(a) Calculated reflectivity of a cavity mirror. (b) Calculated (solid line) and measured (solid circle) cavity losses at the wavelengths of around 2560 nm .

Fig. 2
Fig. 2

Cavity length detuning curve for the average FEL power at a wavelength of around 2560 nm . The electron-beam current changed from 2.6 mA (detuning length: 2.7 μm ) to 2.1 mA ( + 1.4 μm ) in this measurement.

Fig. 3
Fig. 3

Observed spectrum of the MIR FEL at a wavelength of around 2560 nm for the undulator gap of 88 mm and the dispersive gap of 115 mm .

Fig. 4
Fig. 4

Schematic layout of the FEL Compton backscattering experiments in the storage ring NIJI-IV. The distance from the electron bunch 1 to the electron bunch 2 is 9.2 m , and the distance from the electron bunch 2 to the electron bunch 1 is 20.4 m .

Fig. 5
Fig. 5

(a) Measured and (b) calculated spatial distributions of the BC x ray from the imaging plate located behind the downstream cavity chamber. The spatial distribution in (b) is the calculated spatial distribution of the BC x ray from (c) collision point A overlapped with that from (d) collision point B .

Metrics