Journal
PHYSICAL REVIEW ACCELERATORS AND BEAMS
Volume 21, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevAccelBeams.21.121302
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Funding
- U.S. National Science Foundation [PHY-1549132]
- Center for Bright Beams [PHY-1535639]
- U.S. Department of Energy [DE-SC0017648, DE-SC0009914]
- U.S. Department of Energy (DOE) [DE-SC0009914, DE-SC0017648] Funding Source: U.S. Department of Energy (DOE)
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The suppression of transverse wakefield effects using transversely elliptical drive beams in a planar structure is studied with a simple analytical model that unveils the geometric nature of this phenomenon. By analyzing the suggested model we derive scaling laws for the amplitude of the longitudinal and transverse wake potentials as a function of the Gaussian beam ellipticity-sigma(x)/a. We explicitly show that in a wakefield accelerator application it is beneficial to use highly elliptical beams for mitigating transverse forces while maintaining the accelerating field. We consider two scaling strategies: (1) aperture scaling, where we keep a constant charge to have the same accelerating gradient as in a cylindrical structure and (2) charge scaling, where aperture is the same as in the cylindrical structure and charge is increased to match the gradient.
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