強(qiáng)流相對(duì)論電子束環(huán)產(chǎn)生的毫米波相干輻射
COHERENT RADIATION OF MILLIMETER WAVE GENERATED BY INTENSE ANNULAR RELATIVISTIC ELECTRON BEAM
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摘要: 本文研究由躍變磁場(chǎng)產(chǎn)生的繞軸高速旋轉(zhuǎn)的電子束環(huán)(E層)產(chǎn)生毫米波相干輻射的特性。我們采用符拉索夫-麥克斯韋方程分析E層與磁控管腔的相互作用,導(dǎo)出色散關(guān)系,并進(jìn)行了數(shù)值分析。結(jié)果表明,微波幅射頻率為r=l∥(其中∥是電子在軸向磁場(chǎng)中的相對(duì)論迴旋頻率;l是方位角方向上的模數(shù),l=n+mN,N是磁控管腔的邊腔數(shù),n=0,1,2,,N/2,m是任意整數(shù)),而且l很大時(shí)輻射仍有足夠高的增長率。這有利于在低的軸向磁場(chǎng)中產(chǎn)生毫米波輻射。如能很好地解決模式控制問題,就能做成低磁場(chǎng)的可調(diào)諧大功率毫米波器件。
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關(guān)鍵詞:
Abstract: Properties of coherent radiation of millimeter wave generated by a intense rotating annular relativistic electron beam (E-layer) which is from a cusp magnetic field are investigated. The linearized Vlasov-Maxwell equations are used to analyze the interaction between E-layer and re-sonnator of magnetron. The dispersion relation is deduced and numerical calculation is made. The results show that the frequency of microwave radiation is r(r = l∥ where ∥ is the electron relativistic cyclotron frequency in the axial magnetic field; l is the aximuthal mode number, l=n+mN; N is the number of side resonnators, n=0, 1, 2, N/2, m is any integer). The growth rate of radiation is still large enough even if l is good for generating millimeter wave radiation at low axial magnetic field. If the modes can be controlled well, a tunable, high power millimeter wave device can be made. -
J. L. Hirshfield, V. L. Granatstein, IEEE Trans. on MTT, MTT-25(1977), 522.[2]G. Dohler, Int. J. Electronics, 56(1984), 617.[3]R. H. Pantell, IRE Trans. on ED, ED-7(1960), 22.[4]N. C. Christefilos, Proc. of the Second International Conference on the Peaceful Uses of Atomic Energy, Geneva, 1958, Vol. 32, p279. [5] I. Alexeff, E. Dyer, Phys. Rev. Lett., 43(1980), 351.[5]W. W. Destler, R. Kulkarni, C. D. Striffler and R. L. Weiler, J. Appl. Phys., 54(1983), 4152.[6]H. S. Uhm, Chung M. Kim, Phys. Fluids, 27(1984), 488.[7]Y. Z. Yin, G. Bekefi, ibid., 28(1985), 1186.[8]W. W. Destler, F. M. Aghamir, D. A. Boyd, G. Bekefi, R. E. Shefer, Y. Z. Yin, ibid., 28(1985), 1962.[9]G. Bekefi, T. Orzechowski, Phys. Rev. Lett., 37(1976), 379.[10]G. Bekefi.[J].R. E. Shefer, B. D. Nevins, Proc. of the International Conf. on Lasers 82, Dec. 13-1.1982,:-[11]M. J. Rhee, W. W. Destler, Phys. Fluids, 17(1974), 1574.[12]G. B. Collins, Microwave Magnetrons, McGraw-Hill, New York, 1948, Chap. 2. -
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