Please wait a minute...
Chin. Phys. B, 2014, Vol. 23(2): 024102    DOI: 10.1088/1674-1056/23/2/024102
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

Effects of self-fields on gain in two-stream free electron laser with helical wiggler and an axial guiding magnetic field

Saviz Sa, Lashani Ea, Ashkarran Ab
a Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Tehran, P. O. Box 14665-678, Iran;
b Department of Physics, Faculty of Basic Sciences, University of Mazandaran, Babolsar, Iran
Abstract  The theory for the two-stream free electron laser (FEL) consisting of a relativistic electron beam transporting along the axis of a helical wiggler in the presence of an axial guiding magnetic field is proposed and investigated. In the analysis, the effects of self-fields are taken into account. The electron trajectories and the small signal gain are derived. The characteristics of the linear-gain and the normalized maximum gain are studied numerically. The results show that there are seven stable groups of orbits in the presence of self-fields instead of two groups reported in the absence of the self-fields. It is also shown that the normalized gains of three groups decrease while the rest increase with the increasing of normalized cyclotron frequency Ω0. Furthermore, it is found that the two-stream instability and the self-field lead to a decrease in the maximum gain except for group 3. The results show that the normalized maximum gain is enhanced in comparison with that of the single stream.
Received:  24 March 2013      Revised:  15 May 2013      Accepted manuscript online: 
PACS:  41.60.Cr (Free-electron lasers)  
Corresponding Authors:  Saviz S     E-mail:  Shahrooz.saviz@srbiau.ac.ir
About author:  41.60.Cr

Cite this article: 

Saviz S, Lashani E, Ashkarran A Effects of self-fields on gain in two-stream free electron laser with helical wiggler and an axial guiding magnetic field 2014 Chin. Phys. B 23 024102

[1] Freund H P and Antonsen T M 1996 Principles of Free-Electron Lasers (London: Chapman and Hall) pp. 45–50
[2] Roberson C W and Sprangle P 1989 Phys. Fluids B 3 1
[3] Jaber I and Demokan O 1996 Phys. Plasmas 3 4190
[4] Freund H P and Sprangle P 1982 Phys. Rev. A 26 2004
[5] Freund H P, Kehs R A and Granatstein V L 1985 IEEE J. Quantum Electron. 21 1080
[6] Mehdian H, Jafari S and Hasanbeigi A 2008 Phys. Plasmas 15 073102
[7] Chen C and Davidson R C 1991 Phys. Rev. A 43 5541
[8] Michel L, Bourdier A and Buzzi J M 1991 Nucl. Instrum. Methods Phys. Res. A 304 465
[9] Bourdier A and Michel L 1994 Phys. Rev. E 49 3353
[10] Spindler G and Renz G 1991 Nucl. Instrum. Methods Phys. Res. A 304 492
[11] Freund H P, Jackson R H and Pershing D E 1993 Phys. Fluids B 5 2318
[12] Mirzanejhad S, Maraghechi B and Mohsenpour T 2004 Phys. Plasmas 11 4777
[13] Esmaeilzadeh M and Willett J E 2007 Phys. Plasmas 14 033102
[14] McNeil B W J, Robb G R M and Poole M W 2004 Phys. Rev. E 70 035501
[15] Bekefi G and Jacobs K D 1982 J. Appl. Phys. 53 4113
[16] Liu W X, Yang Z Q and Liang Z 2006 J. Infrared Millim. Terahertz Waves 27 1073
[17] Mehdian H and Abasi N 2008 Phys. Plasmas 15 013111
[18] Mehdian H and Saviz S 2010 Chin. Phys. B 19 014214
[1] Picosecond terahertz pump-probe realized from Chinese terahertz free-electron laser
Chao Wang(王超), Wen Xu(徐文), Hong-Ying Mei(梅红樱), Hua Qin(秦华), Xin-Nian Zhao(赵昕念), Hua Wen(温华), Chao Zhang(张超), Lan Ding(丁岚), Yong Xu(徐勇), Peng Li(李鹏), Dai Wu(吴岱), Ming Li(黎明). Chin. Phys. B, 2020, 29(8): 084101.
[2] Axial magnetic field effect in numerical analysis of high power Cherenkov free electron laser
F Bazouband, B Maraghechi. Chin. Phys. B, 2019, 28(6): 064101.
[3] Electric field in two-dimensional complex plasma crystal: Simulated lattices
Behnam Bahadory. Chin. Phys. B, 2018, 27(2): 025202.
[4] Design and development of high linearity millimeter wave traveling-wave tube for satellite communications
He Jun (何俊), Huang Ming-Guang (黄明光), Li Xian-Xia (李现霞), Li Hai-Qiang (李海强), Zhao Lei (赵磊), Zhao Jian-Dong (赵建东), Li Yue (李跃), Zhao Shi-Lei (赵石雷). Chin. Phys. B, 2015, 24(10): 104102.
[5] Plural interactions of space charge wave harmonics during the development of two-stream instability
Victor Kulish, Alexander Lysenko, Michael Rombovsky, Vitaliy Koval, Iurii Volk. Chin. Phys. B, 2015, 24(9): 095201.
[6] Effects of self-fields on electron trajectory and gain in planar wiggler free-electron lasers with two-stream and ion-channel guiding
S. Saviz, M. Karimi. Chin. Phys. B, 2014, 23(3): 034103.
[7] Effect of normalized plasma frequency on electron phase-space orbits in a free-electron laser
Ji Yu-Pin (吉驭嫔), Wang Shi-Jian (王时建), Xu Jing-Yue (徐竟跃), Xu Yong-Gen (徐勇根), Liu Xiao-Xu (刘晓旭), Lu Hong (卢宏), Huang Xiao-Li (黄小莉), Zhang Shi-Chang (张世昌). Chin. Phys. B, 2014, 23(2): 024103.
[8] Effects of self-fields on dispersion relation and growth rate in two-stream electromagnetically pumped free electron laser with axial guide magnetic field
S. Saviz, H. Rajabalinia. Chin. Phys. B, 2013, 22(12): 124101.
[9] Dispersion relation and growth rate for a corrugated channel free-electron laser with a helical wiggler pump
A. Hasanbeigi, H. Mehdiank. Chin. Phys. B, 2013, 22(7): 075205.
[10] Three-dimensional simulation of long-wavelength free-electron lasers with helical wiggler and ion-channel guiding
F. Jafari Bahman, B. Maraghechi. Chin. Phys. B, 2013, 22(7): 074102.
[11] The effects of self-fields on the electron trajectory in a two-stream free electron laser with a helical wiggler and an axial guiding magnetic field
S. Saviz, E. Lashani, Farzin M. Aghamir. Chin. Phys. B, 2012, 21(10): 104104.
[12] Gain enhancement in two-stream free electron laser with planar wiggler and axial guide magnetic field
S. Saviz, Z. Rezaei, Farzin M. Aghamir. Chin. Phys. B, 2012, 21(9): 094103.
[13] Efficiency enhancement of a two-beam free-electron laser using a nonlinearly tapered wiggler
Maryam Zahedian, B. Maraghechi, and M.H. Rouhani . Chin. Phys. B, 2012, 21(3): 034101.
[14] Gain calculation of a free-electron laser operating with a non-uniform ion-channel guide
A. Hasanbeigi, H. Mehdian, and S. Jafari . Chin. Phys. B, 2011, 20(9): 094103.
[15] Effects of self-fields on electron trajectory and gain in two-stream electromagnetically pumped free-electron laser with ion channel guiding
S. Saviz, Farzin M. Aghamir, H. Mehdian, and M. Ghorannevis. Chin. Phys. B, 2011, 20(7): 074101.
No Suggested Reading articles found!