NDLI: Asymmetric emittance beam generation using round beam RF guns and nonlinear optics

Content Provider	IEEE Xplore Digital Library
Author	Fiorentini, G. Pagani, C. Serafini, L.
Copyright Year	1995
Description	Author affiliation: LASA, Istituto Nazionale di Fisica Nucl., Milan, Italy (Fiorentini, G.; Pagani, C.; Serafini, L.)
Abstract	Future generation electron-positron linear colliders need asymmetric flat beams in order to properly control the beam-beam interaction at the final focus. Room temperature collider designs ask for normalized rms transverse emittances which look not attainable by RF photo-injectors, whilst the requirements of the TESLA superconducting collider (/spl epsi//sub nx/=20 mm mrad, /spl epsi//sub ny/=1 mm mrad) are at the edge of the present RF gun status of the art, except for the asymmetric emittance requirements. In this paper we explore the efficiency of conventional round-beam RF guns in conjunction with non-linear optical devices, namely sextupole triplets, as converters of round beams into flat beams, in order to match the TESLA specifications. Basically the beam emittance, at the exit of the gun, must be dominated by non-linear effects (spherical aberrations). A quadrupole doublet and a sextupole triplet, placed downstream the beam transport line, provide respectively a geometric astigmatism and an asymmetric emittance correction in the vertical and in the horizontal phase-spaces. The possibilities to produce asymmetric beams using this technique are presented.
Starting Page	973
Ending Page	975
File Size	291712
Page Count	3
File Format	PDF
ISBN	0780329341
DOI	10.1109/PAC.1995.505099
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-05-01
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Radio frequency Guns Stimulated emission Nonlinear optics Colliding beam devices Vision defects Optical devices Solenoids Lenses Optical beams
Content Type	Text
Resource Type	Article

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