| 1. | The basic electronics of positron imaging systems are composed of the preamplifier , shaper , main amplifier , constant fraction discriminator ( cfd ) and so on
有用的数据采入计算机后，对其进行相关的处理后进行图像重建。 |
| 2. | The built - up and multi - pass amplifier is the mainstream of main amplifier nowadays , so the new scheme that is inserting the avm in the main amplifiers has important application value
目前主放大器的发展主流是组合式多程放大器，因此在组合式放大器中插入avm功率平衡新方案具有重要的应用价值。 |
| 3. | The pulse shape of " sg - ii " laser was controlled triumphantly by avm , attaining a better uniformity of multi - beam pulse shapes , and realizing the power balance control of multi - pass main amplifiers eventually ; 6
首次实现了avm对神光n输出脉冲波形的控制，获得了较好的脉冲波形畸变一致性，最终实现了多程主放大器的avm功率平衡控制。 |
| 4. | Avm is essentially a precision array film attenuator , which has a big diameter , high power load , continuous adjustment . the gain of each beam of the main amplifiers is controlled independently by the adjusting the angle of each cell of avm
Avm实质上是大口径、高功率负载、透过率连续可调的组合式精密薄膜衰减器，通过调节avm各单元偏转角度大小来独立控制住放大器各路的增益。 |
| 5. | The transmissivity balance between the output of rod70 amplifiers and main amplifiers of beam 2 and 4 is controlled by the avm successively , and the overall high energy balance was firstly done with avm . the good results showed the precision , continuity and stability of the avm adjustment ; 5
顺利地实现了avm对2 、 4两路的200 / 70透过率平衡控制，并且首次完成了总体高能能量平衡实验，良好的实验结果表明了avm调节的精密性、连续性和稳定性。 |
| 6. | Although it is much difficult to attain the engineering realization of avm in " sg - ii " main amplifiers , some important results have been achieved through the deep and full study of avm which is from the its engineering design improvement to the overall experiments . the achievements are as follows : 1
尽管在“神光? ”主放大器加入avm的工程实现难度很大，经过积极深入地展开从工程设计改进到总体实验的全面研究，在有限的实验里具体取得了以下成果： 1 |
| 7. | Power balance is necessary to icf , including the energy balance and pulse shape uniformity at the target . 90 percent of the output energy of " sg - ii " comes from its double - pass coaxial array main amplifiers , and pulse shape distortion caused by gain saturation also occurs mostly in there . therefore precise control of gain performance of the main amplifiers by avm ( angular variable mirror ) is the key to the precise power balance of " shenguang - ii "
“神光? ”装置90的激光能量由同轴双程主放大器提供，同时增益饱和效应产生脉冲波形畸变也主要发生在主放大器阶段，因此应用组合式角变反镜( avm ， angularvariablemirror )独立精密控制主放大器各路的增益性能是实现“神光? ”装置精密化功率平衡的关键。 |
