Stable Sheet-Beam Transport in Periodic Nonsymmetric Quadrupole Field

Stable sheet electron-beam transport is critical for sheet-beam microwave device which is attractive for high-power millimeter wave to terahertz-regime radiation. This paper studies the stable sheet-beam transport in periodic nonsymmetric quadrupole field. First, the conditions for stable round- and sheet-beam transport in periodic magnetic quadrupole field are deduced. In the deduction, we find that the symmetric quadrupole field and the space-charge field of sheet beam are not well matched. In order to settle this problem, we use periodic nonsymmetric quadrupole field instead of periodic symmetric quadrupole field to transport sheet beam. Finally, 3-D PIC simulations verify the conditions for stable sheet-beam transport and show that periodic nonsymmetric quadrupole field is intrinsically well suited for sheet-beam transport.

[1]  Bruce E. Carlsten,et al.  First observation of elliptical sheet beam formation with an asymmetric solenoid lens , 2005 .

[2]  Z. X. Zhang,et al.  Experimental and numerical studies of sheet electron beam propagation through a planar wiggler magnet , 1993 .

[3]  S. Humphries,et al.  Focusing of high-perveance planar electron beams in a miniature wiggler magnet array , 2005, IEEE Transactions on Plasma Science.

[4]  J. Booske,et al.  Magnetic quadrupole formation of elliptical sheet electron beams for high-power microwave devices , 1994 .

[5]  Thomas M. Antonsen,et al.  Stability and confinement of nonrelativistic sheet electron beams with periodic cusped magnetic focusing , 1993 .

[6]  W. W. Destler,et al.  Periodic magnetic focusing of sheet electron beams , 1994 .

[7]  Martin Reiser,et al.  Theory and Design of Charged Particle Beams , 1994 .

[8]  Record High Power Terahertz Radiation from Relativistic Electrons , 2002 .

[9]  John H. Booske,et al.  Plasma physics and related challenges of millimeter-wave-to-terahertz and high power microwave generationa) , 2008 .

[10]  E. Regenstreif.  FOCUSING WITH QUADRUPOLES, DOUBLETS, AND TRIPLETS , 1967 .

[11]  Wayne R. McKinney,et al.  High-power terahertz radiation from relativistic electrons , 2002, Nature.

[12]  E. Linfield,et al.  Terahertz semiconductor-heterostructure laser , 2002, Nature.

[13]  J. Anderson,et al.  Formation and transport of sheet-electron beams and multibeam configurations for high-power microwave devices , 1995, Optics & Photonics.

[14]  Frank L. Krawczyk,et al.  Stable two-plane focusing for emittance-dominated sheet-beam transport , 2005 .