Analysis and simulation of the breakdown characteristic for PBG structure

LI Bo WU Congfeng LIANG Minqiang

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Analysis and simulation of the breakdown characteristic for PBG structure

更新时间：2021-03-05

- Analysis and simulation of the breakdown characteristic for PBG structure
- NUCLEAR TECHNIQUES Vol. 35, Issue 7, (2012)
- 作者机构：
  
  中国科学技术大学国家同步辐射实验室
- 作者简介：
- 基金信息：
  
  国家自然科学基金项目(10375060、10675116)资助
- DOI：
  CLC： TL503
- Published：01 July 2012
- 稿件说明：
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[1]李波,吴丛凤,梁敏强.PBG加速结构的击穿特性的分析与计算[J].核技术,2012,35(07):495-498.

LI Bo WU Congfeng LIANG Minqiang. Analysis and simulation of the breakdown characteristic for PBG structure[J]. Nuclear techniques, 2012, 35(7): 495-498.
[1]李波,吴丛凤,梁敏强.PBG加速结构的击穿特性的分析与计算[J].核技术,2012,35(07):495-498. DOI：

LI Bo WU Congfeng LIANG Minqiang. Analysis and simulation of the breakdown characteristic for PBG structure[J]. Nuclear techniques, 2012, 35(7): 495-498. DOI：

摘要

磁场对用在高频、高功率下的PBG（Photonic Band-Gap）加速结构的击穿性能有很大影响。用微波工作室对金属加载的PBG加速结构进行模拟计算并深入分析了k（棒的半径与棒间距的比值）在0.16–0.25范围内加速结构的电磁特性

电场与磁场的比值E/H、磁场的热效应等。结果表明

当k 0.19时

圆形金属棒加载的光子晶体加速结构的E/H值为240

磁场的热效应导致的温升T值高达300 K;而用椭圆金属棒代替内圈圆形的金属棒

加速结构的E/H值提高了140

温升T的值下降了150 K。另外

进一步讨论了一种新型的高Q值（10000以上）的准光子晶体加速结构的电磁场

其E/H峰值可达570

而且其内圈使用的是Al2O3陶瓷棒

由于介电物质的击穿强度比金属的高

因而可以预计该种新型准光子晶体加速结构有望实现更高梯度加速。

Abstract

In order to understand breakdown characteristic of the photonic band-gap(PBG) structures working at high power and high repetition rate

the PBG accelerator structure is simulated and analyzed at X band(11.424 GHz) in this paper.The results show that the E/H value of the PBG accelerating structure with ronnd metallic inner rods is at 240

and its T value is at 300 K.By replacing the ronnd inner rods with oval-shaped metal rods

the peak E/H value increases by 140 and the T value decreases by 150 K.The electromagnetic field of a new quasi-PBG accelerating structure is simulated

too

with the Q value of over 10000 and E/H = 570.Because of the inner Al2O3 ceramic rods

it is a structure of high gradient acceleration.

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