Abstract
C-band (twice of S-band frequency) linear accelerator technology was initially developed for the future e+ e− linear collider project. R&D took place from 1996 ∼ 2000, guided by the author at KEK (Group 1992; Shintake et al. 1995, 1998), followed by SCSS project (Shintake et al. 2001, 2003; Group 2004) at RIKEN/SPring-8 (2001 ∼ 2005), where we demonstrated high-gradient operation of a C-band accelerator. Based on the developed C-band technology, 400-m-long 8-GeV C-band accelerator was built at the SPring-8 site (2006 ∼ 2010) as the main linac to drive the X-ray FEL facility: XFEL/SPring-8, later renamed as “SACLA” (SCSS X-FEL R&D Group 2004; Shintake and XFEL/SPring-8 Joint Team 2010; Ishikawa et al. 2012). After 1,700 h of high-power conditioning, the maximum acceleration gradient reached 38 MV/m. The machine trip rate for each accelerator unit under nominal operation conditions is currently as low as once per day at a gradient of 35 MV/m and a repetition cycle of 30 pps. The measured stabilities of phase and amplitude of the rf field were 0.03∘ and 0.01 % standard deviation, respectively. They were sufficient for the future upgrade to the seeded FEL operation. The first lasing was achieved in 2011, and since then, the C-band accelerator has been operated full-time, demonstrating fairly stable performance under continuous operation for 20,000 h. Twenty years of R&Ds were required from the first proposal to reach this point.
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References
T. Bizen, Development of vacuum components for XFEL/SPring-8, in Proceedings of EPAC08, 11th European Particle Accelerator Conference, Genoa, 23–27 June 2008 (2008)
Z.D. Farkas et al., SLED: a method of doubling SLAC’s energy, SLAC-PUB-1453, June 1974
T. Inagaki et al., High gradient operation of 8 GeC C-band accelerator in SACLA, in Proceedings of LINAC2012, Tel-Aviv (2012)
T. Inagaki, C. Kondo, H. Maesaka, T. Ohshima, Y. Otake, T. Sakurai, K. Shirasawa, T. Shintake, High-gradient C-band linac for a compact x-ray free-electron laser facility. PRST-AB Phys. Rev. Spec. Top. Accel. Beams 17, 080702 (2014)
T. Ishikawa et al., A compact X-ray free-electron laser emitting in the sub-angstrom region. Nat. Photon. 6, 540–544 (2012). 2012.141
A. Jensen et al., 25 year performance review of the SLAC 5045 S-band klystron, in Proceedings of IPAC2011, San Sebastian (2011)
C. Kondo, T. Inagaki, K. Shiarasawa, T. Sakurai, T. Shintake, Cooling system design of compact klystron modulator power supply in the XFEL Project at SPring-8, in Proceedings of the LINAC08, Victoria, 2008
LC Group, JLC-I, KEK Report 92-16, Dec 1992, A/H/M (1992)
H. Maesaka et al., Development of the optical timing and RF distribution system for XFEL/SPring-8, in Proceedings of FEL’08, Gyeongju (2008), p. 352
H. Matsumoto, Dark currents, in Proceedings in LINAC’96, XVIII International Linac Conference, Geneva, 26–30 Aug 1996 (1996)
H. Matsumoto et al., R&D of the C-band klystron modulator, in Presented at: 2nd Modulator-Klystron Workshop for Future Linear Colliders, Stanford, Oct 1995 [SLAC 481], pp. 138–147 (1995)
H. Matsumoto, T. Shintake, N. Akasaka, Development of C-band (5712 MHz) high power waveguide components, in Proceeding PAC’97, Particle Accelerator Conference, Vancouver, 12–16 May 1997 (1997)
R.B. Neal, The Stanford two-mile linear accelerator, SLAC -PUB-233. Stanford Linear Accelerator Center, Stanford University, Stanford (1966)
J.S. Oh et al., Efficiency issue in C-band klystron-modulator system for linear collider, in Proceeding PAC,97, 1997 Particle Accelerator Conference, Vancouver, 12–16 May 1997 (1997)
J.S. Oh et al., Development of a smart modulator and efficiency evaluation of 500-GeV e+ e− C-band linear collider, in Proceedings of 20th International Linear Accelerator Conference (LINAC’2000), Monterey (2000)
Y. Ohkubo et al., The C-band 50MW klystron using traveling-wave output structure, in Proceedings of 19th International Linear Accelerator Conference (LINAC’98), Chicago (1998)
K. Okihira et al., Mass production report of C-band choke mode accelerating structure and rf pulse compressor, in IPAC2011, San Sebastian (2011)
Y. Otake et al., Beam monitor system for an x-ray free electron laser and compact laser. Phys. Rev. ST Accel. Beams 16, 042802 (2013)
SCSS X-FEL R&D Group, SCSS XFEL Conceptual Design Report, edited by T. Shintake and T. Tanaka, RIKEN/SPring-8, Japan (2004)
T. Shintake, The choke mode cavity. Jpn. J. Appl. Phys. 31, L1567–L1570 (1992)
T. Shintake, Klystron simulation and design using the Field Charge Interaction (FCI) code. Nucl. Instrum. Methods Phys. Res. A 363, 83–89 (1995)
T. Shintake, Recent status of FCI: PIC simulation of coupled-cavity structure, in LINAC96, XVIII International Linear Accelerator Conference, Geneva, 26–30 Aug 1996 (1996)
T. Shintake et al., C-band linac RF-system for e+ e− linear collider, in Proceedings of 16th Biennial Particle Accelerator Conference: PAC’95, Dallas (1995)
T. Shintake, N. Akasaka, H. Matsumoto, Development of C-band 50 MW Pulse Klystron for e+ e− Linear Collider, in Proceedings of the International Particle Accelerator Conference (PAC97), Vancouver, 12–16 May 1997 (1997a)
T. Shintake, N. Akasaka, H. Matsumoto, Development of C-band RF pulse compression system for e+ e− linear collider, in PAC’97, Particle Accelerator Conference, Vancouver, 12–16 May 1997 (1997b)
T. Shintake et al., Results from hardware R&D on C-band RF-system for e+ e− linear collider, in proceedings of XIX International Linac Conference LINAC98, Chicago, Aug 1998
T. Shintake et al., The first wakefield test on the C-band choke-mode accelerating structure, in Proceedings of PAC’99, New York (1999)
T. Shintake et al., SPring-8 compact SASE source (SCSS), in SPIE’s 46th Annual Meeting, The International Symposium on Optical Science and Technology, San Diego, 29 July–3 Aug 2001
T. Shintake et al., Status of SPring-8 compact SASE source FEL project, NIM A21188. Nucl. Instrum. Methods Phys. Res. A 507, 382–397 (2003)
T. Shintake et al., A compact free-electron laser for generating coherent radiation in the extreme ultraviolet region. Nat. Photon. 2, 555–559 (2008)
T. Shintake et al., Stable operation of a self-amplified spontaneous-emission free-electron laser in the extremely ultraviolet region. Phys. Rev. ST Accel. Beams 12, 070701 (2009)
T. Shintake, Compact klystron modulator for XFEL/SPring-8, in IPAC’10, Kyoto, p. 3287 (2010)
T. Shintake, XFEL/SPring-8 Joint Team, Status report on Japanese XFEL construction project at SPring-8, in Proceedings of IPAC’10, Kyoto (2010)
C. Suzuki et al., Input coupler design for C-band accelerating structure, in Proceeding 17th IEEE Particle Accelerator Conference (PAC 97), Vancouver, 12–16 May 1997 (1997)
H. Tanaka et al., Low Emittance Injector at SCSS, Prod. FEL2006, Aug 2006, BESSY, Berlin (2006)
R. Tanaka et al., First operation of the SACLA control system in Spring-8, in Proceedings of IPAC2011, San Sebastián (2011)
K. Togawa et al., CeB6 electron gun for low-emittance injector. Phys. Rev. ST Accel. Beams 10, 020703 (2007)
Acknowledgements
The author would like to thank all contributors on C-band R&D and SACLA construction. The author wishes to acknowledge specially Dr. Hiroshi Matsumoto and Dr. Masakazu Yoshioka for their long periods of supports and encouragements. Finally, the author would like to thank Dr. Takahiro Inagaki for his excellent contribution on C-band system development by designing details, careful quality test, and patiently debugging the whole system; without his effort we could not achieve this result.
The author would like to thank the industry people who contributed to C-band R&D and SACLA construction with careful and patient work, especially Dr. Sadao Miura and Dr. Atsushi Miura for their excellent contributions on C-band high power waveguide and accelerator development, and Dr. Yoshihisa Ohkubo for his extensive work on 50 MW C-band klystron development. Finally, the author would like to thank Prof. Hitoshi Baba for his various contributions and long period of encouragement to us.
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Shintake, T. (2015). The SACLA X-Ray Free-Electron Laser Based on Normal-Conducting C-Band Technology. In: Jaeschke, E., Khan, S., Schneider, J., Hastings, J. (eds) Synchrotron Light Sources and Free-Electron Lasers. Springer, Cham. https://doi.org/10.1007/978-3-319-04507-8_9-2
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DOI: https://doi.org/10.1007/978-3-319-04507-8_9-2
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The SACLA X-Ray FEL Based on Normal-Conducting C-Band Technology- Published:
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DOI: https://doi.org/10.1007/978-3-319-04507-8_9-1