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.

引用

页数：8

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