Abstract
There are difficulties in developing high-power and small-size terahertz (THz) sources that can be used for field applications. In an attempt to design small-size THz free-electron laser (FEL) devices capable of producing higher output powers in the THz spectral region of 1–2 THz, we have developed a microtron accelerator that can accelerate electron beams to 3–6 meV, with a macropulse current of more than 40 mA. The new THz FELs use hybrid electromagnetic (EM) undulators that are two to four times shorter in length than the previous undulator and waveguide resonators with mode cross-sectional areas that are more than two times smaller than the parallel-plate waveguide in the existing FEL. We confirm that the gains and losses of the compact FELs are sufficient for lasing, and we estimate that average output power of approximately 1 W is possible with an efficiency approximately 10 times greater than the existing FEL. The minimum size of the THz FEL system, including a high-voltage pulse modulator, is estimated to be approximately 1.5 m × 2.0 m.
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References
J.H. Son, S.J. Oh, H. Cheon, J. Appl. Phys. 125, 190901 (2019)
Q. Sun et al., Quant. Imaging Med. Surg. 7, 345 (2017)
D. Alves-Lima et al., Sensors 20, 1441 (2020)
X.Y. Miao et al., Sci. China-Phys. Mech. Astron. 61, 104211 (2018)
L. Consolino, S. Bartalini, P. De Natale, J. Infrared Milli Terahertz Waves 38, 1289 (2017)
K. Kawase, Y. Ogawa, Y. Watanabe, Opt. Express 20, 2549 (2003)
G.-R. Kim, T.-I. Jeon, D. Grischkowsky, Opt. Express 25, 25422 (2017)
L. Yu et al., RSC Adv. 9, 9354 (2019)
J.F. Federici et al., Semicond. Sci. Technol. 20, 266 (2005)
C. Corsi, F. Sizov, THz and Security Applications (Springer, Berlin, 2014).
C. Sirtori, Nature 417, 132 (2002)
L.R. Elias, IEEE J. Quantum Electron. 23, 1470 (1987)
D. Oepts, A.F.G. van der Meer, P.W. van Amersfoort, Infrared Phys. Technol. 36, 297 (1995)
R. Prazeres et al., Nucl. Instrum. Methods A 445, 204 (2000)
A. Doria et al., Nucl. Instrum. Methods A 475, 296 (2001)
Y.U. Jeong et al., Nucl. Instrum. Methods A 528, 88 (2004)
J.M. Klopf et al., Nucl. Instrum. Methods A 582, 114 (2007)
G.N. Kulipanov et al., Terahertz Sci. Technol. 1, 107 (2008)
G.N. Kulipanov et al., IEEE Trans. Terahertz Sci. 5, 798 (2015)
B.A. Knyazev, G.N. Kulipanov, N.A. Vinokurov, Meas. Sci. Technol. 21, 054017 (2010)
Y.U. Jeong et al., Nucl. Instrum. Methods A 475, 47 (2001)
Y.U. Jeong et al., Nucl. Instrum. Methods A 483, 363 (2002)
G.M. Kazakevitch et al., Nucl. Instrum Methods A 507, 146 (2003)
Y.U. Jeong et al., Nucl. Instrum. Methods A 543, 90 (2005)
H.J. Cha et al., J. Korean Phys. Soc. 49, 354 (2006)
G.N. Zhizhin et al., Infrared Phys. Technol. 49, 108 (2006)
Y. Hwang et al., Opt. Express 22, 11465 (2014)
J. Mun et al., Phys. Rev. ST Accel. Beams 17, 080701 (2014)
Y.U. Jeong et al., IEEE Trans. Nucl. Sci. 63, 898 (2016)
T. Yoon, et al., 2019 IVEC, IEEE, https://doi.org/10.1109/IVEC.2019.8745332 (Busan, Korea, 2019).
S. Bae, et al., 2019 IVEC, IEEE, https://doi.org/10.1109/IVEC.2019.8745262 (Busan, Korea, 2019).
S.V. Miginsky et al., Bull. Russ. Acad. Sci. Phys. 82, 1604 (2018)
S.P. Kapitza, V.N. Melekhin, The Microtron (Harwood Academic Publishers, Reading, 1978).
W.B. Colson, C. Pellegrini, A. Renieri, Laser Handbook, vol. 6 (North Holland, New York, 1990).
H. Zen, H. Ohgaki, R. Hajima, Phys. Rev. Accel. Beams 23, 070701 (2020)
H. Zen, H. Ohgaki, R. Hajima, Appl. Phys. Express 13, 102007 (2020)
Y.U. Jeong et al., J. Korean Phys. Soc. 51, 416 (2007)
Acknowledgements
The authors would like to thank the late Dr. Sergey Miginsky for helpful discussions and gratefully acknowledge support from the internal R&D program of KAERI, funded by the Ministry of Science and ICT (MSIT) of the Republic of Korea (524420-21), and a National Research Council of Science & Technology (NST) Grant awarded by the Korean government (MSIT) (No. CAP-18-05-KAERI).
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Bae, S., Mun, J., Jang, KH. et al. Gain and efficiency of table-top terahertz free-electron lasers driven by a microtron accelerator. J. Korean Phys. Soc. 78, 1047–1054 (2021). https://doi.org/10.1007/s40042-021-00161-8
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DOI: https://doi.org/10.1007/s40042-021-00161-8