CAJ | 학술논문

基于电子轰击式CCD的大动态条纹相机研究?
기우전자굉격식CCD적대동태조문상궤연구?
Research on large dynamic range streak camera based on electron-b ombarded CCD

万方数据

物理学报物理學報 물이학보

2015年 9期 098501-8-098501-1 ,共1页

朱敏%田进寿%温文龙%王俊锋%曹希斌%卢裕%徐向晏%赛小锋%刘虎林%王兴%李伟华

주민%전진수%온문룡%왕준봉%조희빈%로유%서향안%새소봉%류호림%왕흥%리위화

条纹相机%电子轰击式CCD%空间分辨率%动态范围條紋相機%電子轟擊式CCD%空間分辨率%動態範圍
조문상궤%전자굉격식CCD%공간분변솔%동태범위
streak camera%electron-bombarded CCD%spatial resolution%dynamic range

为了实现对更弱、以及物理量跨度更大的信号探测,满足材料、生物、信息、半导体物理以及能源等重大科学领域对诊断精密化的进一步需求,需要提高条纹相机的动态范围、空间分辨率和信噪比.为此,本文研制了基于电子轰击式CCD(EBCCD)的大动态条纹相机,条纹变像管采用时间和空间方向分别聚焦的矩形框电极和电四极透镜结构,可降低空间电荷效应.并提高电子加速电压,减小电子渡越时间以降低空间电荷相互作用时间.采用基于电子轰击读出技术的背照式CCD(BCCD)作为读出器件,取代传统的像增强CCD(ICCD)以缩短图像转换链,较大地降低了超快诊断设备转换过程中的图像衰减,从而提高条纹相机图像的信噪比、空间分辨率和动态范围.实验得到静态空间分辨率高于35 lp/mm,动态空间分辨率达到20 lp/mm,偏转灵敏度为60.76 mm/kV,动态范围达到2094：1,扫描速度非线性为5.04%,条纹相机的电子轰击半导体(EBS)增益达到3000以上.
위료실현대경약、이급물리량과도경대적신호탐측,만족재료、생물、신식、반도체물리이급능원등중대과학영역대진단정밀화적진일보수구,수요제고조문상궤적동태범위、공간분변솔화신조비.위차,본문연제료기우전자굉격식CCD(EBCCD)적대동태조문상궤,조문변상관채용시간화공간방향분별취초적구형광전겁화전사겁투경결구,가강저공간전하효응.병제고전자가속전압,감소전자도월시간이강저공간전하상호작용시간.채용기우전자굉격독출기술적배조식CCD(BCCD)작위독출기건,취대전통적상증강CCD(ICCD)이축단도상전환련,교대지강저료초쾌진단설비전환과정중적도상쇠감,종이제고조문상궤도상적신조비、공간분변솔화동태범위.실험득도정태공간분변솔고우35 lp/mm,동태공간분변솔체도20 lp/mm,편전령민도위60.76 mm/kV,동태범위체도2094：1,소묘속도비선성위5.04%,조문상궤적전자굉격반도체(EBS)증익체도3000이상.
In order to detect the weaker on greater span of light signals, the dynamic range, spatial resolution, and the signal to noise ratio of the streak camera need to be improved to meet further diagnostic requirements in scientific area of materials, biology, information, semiconductor physics and energy, etc. Therefore, we design a streak camera with a larger dynamic range based on electron-bombarded CCD. Using the rectangle-framed electrode and electric quadruple lens in the streak camera can reduce its space charge effect and shorten the space charge interaction time by improving electron accelerating voltage to minimize the electron transit time. Using a back-illuminated CCD, which is based on the electron bombardment readout technology as image device to replace the traditional intensified CCD can shorten the chain of image conversion and greatly reduce the image degradation in the conversion of ultrafast diagnostic equipment. The signal to noise ratio, spatial resolution and dynamic range of the streak camera may gain improvement. Experimental results show that the static spatial resolution is better than 35 lp/mm and the dynamic spatial resolution is up to 20 lp/mm. Deflection sensitivity is 60.76 mm/kV and dynamic range reaches 2094: 1. Nonlinear scanning speed is 5.04%. EBS gain of the streak camera can be over 3000.