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@inproceedings{inagaki:ipac2021-wepab039,
author = {T. Inagaki and T. Asaka and H. Dewa and T. Fukui and T. Hara and S. Hashimoto and T. Hiraiwa and N. Hosoda and S.I. Inoue and E. Iwai and K. Kajimoto and C. Kondo and H. Maesaka and T. Magome and Y. Minagawa and S. Nakata and T. Ohshima and T. Sakurai and T. Seno and H. Sumitomo and R. Takesako and H. Tanaka and S. Tanaka and R. Yamamoto and K. Yanagida and M. Yoshioka},
% author = {T. Inagaki and T. Asaka and H. Dewa and T. Fukui and T. Hara and S. Hashimoto and others},
% author = {T. Inagaki and others},
title = {{Construction of a Compact Electron Injector Using a Gridded RF Thermionic Gun and a C-Band Accelerator}},
booktitle = {Proc. IPAC'21},
pages = {2687--2689},
eid = {WEPAB039},
language = {english},
keywords = {linac, electron, injection, operation, emittance},
venue = {Campinas, SP, Brazil},
series = {International Particle Accelerator Conference},
number = {12},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {08},
year = {2021},
issn = {2673-5490},
isbn = {978-3-95450-214-1},
doi = {10.18429/JACoW-IPAC2021-WEPAB039},
url = {https://jacow.org/ipac2021/papers/wepab039.pdf},
note = {https://doi.org/10.18429/JACoW-IPAC2021-WEPAB039},
abstract = {{A compact and low-cost 1 GeV injector linac was designed and constructed to provide injection beams to the soft X-ray synchrotron radiation facility NewSUBARU instead of the SPring-8 injector system, which will be shutdown. The total length of the injector linac needs to be less than 70 m to fit into the existing tunnel. To this end, an RF electron gun with a gridded thermionic cathode directly attached to a 238 MHz RF cavity was developed and adopted. The 500 keV, 0.6 ns, 1 nC beam emitted from the cavity is compressed to 3 ps by velocity bunching driven by a 476 MHz RF cavity and a S-band RF structure. The short-pulsed beams are accelerated up to 1 GeV with 16 C-band RF structures. In the C-band accelerator section, the klystron output of 50 MW is multiplied 4 times by a pulse compressor and fed to the 4 RF structures to generate a high accelerating field of 31 MV/m. A low-level RF system consisting of a MTCA.4 based high-speed digitizers and RF frontend boards has been constructed. This injector system is used at the 3 GeV SR facility currently under construction in Sendai. In this paper, we report the design outline and the operational performance of the injector system.}},
}