電子在磁鏡系統(tǒng)中的運(yùn)動
MOTION OF ELECTRON ACROSS AN ALPHA MAGNETIC MIRROR SYSTEM
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摘要: 本文研究具有任意初始入射條件的電子在磁鏡系統(tǒng)中的運(yùn)動。研究發(fā)現(xiàn),在中心軌道確定之后,任何其它軌道可以區(qū)分為正常軌道或非正常軌道。在正常軌道上運(yùn)動的電子接受動量選擇狹縫的選擇,而在非正常軌道上運(yùn)動的電子不受動量選擇狹縫的作用。文中給出了正常軌道上的任一微分弧元在中心軌道坐標(biāo)系中的投影的計算方法,并且經(jīng)大量的數(shù)值計算證明是可靠的。這一工作對于了解帶電粒子束在通過磁鏡系統(tǒng)時的運(yùn)動的詳細(xì)過程有重要意義。
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關(guān)鍵詞:
- 電子光學(xué); 磁鏡; 標(biāo)準(zhǔn)粒子; 軌道投影
Abstract: Motion of an electron across an alpha magnetic mirror system with arbitray incident conditions is studied. It is found that when the central trajectory is given, any other trajectories can be distinguished as normai and abnormal ones. Electrons moving along normal trajectories accept filtering of momentum filter slit, while the others along abnormal trajectories will not. The method of computing the projections onto the central trajectory co-ordinate system of a differential arc element along normal trajectory is given, which is numerically demonstrated with enough precision. This work is of significance for understanding the details of motion of charged particle beam across alpha magnetic mirror system. -
S. V. Benson, et al., Nucl. Instr. and Meth., A250(1986), 39.[2]T. C. Marshall, Free Electron Lasers, Macmillan, Inc., (1985).[3]G. A. Westenskow, J. M. J. Madey, Lasers and Particle Beams, 2(1984), 223.[4]H. A. Enge, Rev. Sci. Instr., 34(1963), 385.[5] G. A. Westenskow et al., HEPL Technical Note TN-86-1, (1986).[5]K. L. Brown, R. Belbeoch, P. Bounin, Rev. Sci. Instr., 35(1964), 481. -
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