中国科学院机构知识库网格系统: 检索

浏览/检索结果: 共5条，第1-5条

帮助

条数/页：排序方式：
	Performance on absolute scattering intensity calibration and protein molecular weight determination at BL16B1, a dedicated SAXS beamline at SSRF 期刊论文 OAI收割 JOURNAL OF SYNCHROTRON RADIATION, 2017, 卷号: 24, 页码: 509-520 作者: Zeng, JR; Bian, FG; Wang, J; Li, XH; Wang, YZ \| 收藏 \| 浏览/下载：20/0 \| 提交时间：2017/12/08 Beamline Saxs Absolute Intensity Calibration Molecular Weight
	A Comparative Study of the Laser Induced Breakdown Spectroscopy in Single- and Collinear Double-Pulse Laser Geometry 期刊论文 OAI收割 PLASMA SCIENCE & TECHNOLOGY, 2014, 卷号: 16, 页码: 374-379 作者: Sun Duixiong; Su Maogen; Dong Chenzhong; Wen Guanhong \| 收藏 \| 浏览/下载：32/0 \| 提交时间：2018/07/05 Plasma Diagnostics Intensity Calibration Emission Signal Enhancement
	The calibration of faint simulation star magnitude based on single photon count technique (EI CONFERENCE) 会议论文 OAI收割 International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Imaging Detectors and Applications, June 17, 2009 - June 19, 2009, Beijing, China 作者: Xu S.-Y.; Guo J.; Guo J. 收藏 \| 浏览/下载：37/0 \| 提交时间：2013/03/25 A calibration method of faint star magnitude of the star scene simulation device is proposed in this paper. In the research of simulation star magnitude luminometers and CCD devices are the general calibration devices which are used to measure the illumination intensity and calibrate its magnitude. But if the simulation magnitude is only sixth magnitude its illumination intensity is only 1.010-8 Lux. This illumination intensity level is the lowest illumination intensity that the commercial luminometer can detect. Hence the simulation star magnitude lower than six magnitude cannot be calibrated by luminoters. Likewise CCD devices also need an additive cooler in this case. When the single photon characteristic is presented due to the low luminosity of simulating light sources the simulation star magnitude can be calibrated by detecting its photon flux of radiation with the method of single photon count. In this paper the detection principle of single photon based on a compact designed PMT detecting of the radiation level of simulation star magnitude is advanced. Especially a spectrum match method is proved theoretically to be an effective means for selecting PMT photosensitive type. In the case of the detection object of the simulation star in visible wavelength a analysis indicates that the material of tri-alkali cathode materials its best choice after being compared the Signal-to-Noise of photon detector of several PMT photosensitive materials based on the different spectrum match ratio of different object light sources and different cathode materials. An experiment is employed to show the relationship of control voltage of PMT and its dark counter the relationship of the environment temperature of PMT and its dark counter which proves its only decades of CPS at room temperature. The so low dark counter avoids a bulky cooler and is convenient for installing it on the star scene simulation equipment. Finally in the experiment of calibrating the simulation star magnitudes the ability of its calibration is confirmed to reaches up to 12m meanwhile its calibration error is within 0.2m. 2009 SPIE.
	Design and calibration of the measuring system for soft X-ray absolute intensity 期刊论文 OAI收割 HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION, 1998, 卷号: 22, 期号: 2, 页码: #REF! 作者: Cui CW(崔聪悟); Cui MQ(崔明启); Cui, CW; Cui, MQ; Yi, RQ 收藏 \| 浏览/下载：28/0 \| 提交时间：2016/04/12 soft X-ray absolute intensity measurement ionization chamber calibration
	A new ion chamber with a movable photodiode monitor for absolute intensity measurements of soft X-rays 期刊论文 OAI收割 JOURNAL OF SYNCHROTRON RADIATION, 1998, 卷号: 5, 期号: 3, 页码: 872-873 作者: Cui CW(崔聪悟); Cui MQ(崔明启); Cui, CW; Cui, MQ; Yi, RQ 收藏 \| 浏览/下载：23/0 \| 提交时间：2016/06/28 ion chambers calibration soft X-ray absolute intensity measurements