Optimized transmission-line impedance transformers for petawatt-class pulsed-power accelerators

被引：36
|
作者：
Welch, D. R. [1 ]
Genoni, T. C. [1 ]
Rose, D. V. [1 ]
Bruner, N. L. [1 ]
Stygar, W. A. [2 ]
机构：
[1] LLC, Voss Sci, Albuquerque, NM 87108 USA
[2] Sandia Natl Labs, Albuquerque, NM 87185 USA
来源：
PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS | 2008年 / 11卷 / 03期
关键词：
D O I：
10.1103/PhysRevSTAB.11.030401
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
We have developed 1D analytic and 2D fully electromagnetic models of radial transmission-line impedance transformers. The models have been used to quantify the power-transport efficiency and pulse sharpening of such transformers as a function of voltage pulse width and impedance profile. For the cases considered, we find that in the limit as Gamma -> 0 ( where Gamma is the ratio of the pulse width to the one-way transit time of the transformer), the transport efficiency is maximized when the impedance profile is exponential. As Gamma increases from zero, the optimum profile gradually deviates from an exponential. A numerical procedure is presented that determines the optimum profile for a given pulse shape and width. The procedure can be applied to optimize the design of impedance transformers used in petawatt-class pulsed-power accelerators.
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页数：8
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