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An improved method of bunch-by-bunch beam position calculation in a heavy-ion synchrotron 期刊论文  OAI收割
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2022, 卷号: 1021, 页码: 9
作者:  
Wei, Xiaojuan;  Li, Min;  Mao, Ruishi;  Li, Weilong;  Chen, Yucong
  |  收藏  |  浏览/下载:83/0  |  提交时间:2022/01/07
Hybrid Regularized Cone-Beam Reconstruction for Axially Symmetric Object Tomography 期刊论文  OAI收割
ACTA MATHEMATICA SCIENTIA, 2021, 页码: 17
作者:  
Li, Xinge;  Wei, Suhua;  Xu, Haibo;  Chen, Chong
  |  收藏  |  浏览/下载:14/0  |  提交时间:2022/04/02
Improving the creep resistance and tensile property of UHMWPE sheet by radiation cross-linking and annealing 期刊论文  OAI收割
RADIATION PHYSICS AND CHEMISTRY, 2016, 卷号: 125, 期号: -, 页码: 41—49
作者:  
Wang, HL;  Xu, L;  Li, R;  Hu, JT;  Wang, MH
收藏  |  浏览/下载:20/0  |  提交时间:2016/09/12
Optical system of golay-3 synthetic aperture telescope of Fizeau style (EI CONFERENCE) 会议论文  OAI收割
2010 3rd International Conference on Advanced Computer Theory and Engineering, ICACTE 2010, August 20, 2010 - August 22, 2010, Chengdu, China
作者:  
Sun Z.-Y.
收藏  |  浏览/下载:20/0  |  提交时间:2013/03/25
Far-field focusing of laser beam based on digital image processing techniques (EI CONFERENCE) 会议论文  OAI收割
Optoelectronic Imaging and Multimedia Technology, October 18, 2010 - October 20, 2010, Beijing, China
作者:  
Zhao S.;  Tian Y.-Z.;  Liu L.-S.;  Guo J.;  Zhang H.-Y.
收藏  |  浏览/下载:28/0  |  提交时间:2013/03/25
In order to lead the laser beam transmit in the atmosphere convergently  an experiment of laser focus at the distance of 450m and 300m has been operated in the outdoor place. The actual manipulations are as follows: Firstly  the laser was collimated by a beam expander  then the near-parallel laser beam was transmitted with a Galileo telescope system  and the distance between the concave lens and the convex lens can be tuned through a precise displacement platform  so the focus of the system changed due to the tiny displacement of the concave lens. Secondly  the average power of the laser spot can be measured using power meter  the power is 47.67mW and the standard deviation is 0.67mW while the focal length is 450m. Thirdly  the energy distribution was found through the laser beam analyzer. The spot images were saved using the beam analyzer  then the saved image can be processed with Matlab software afterwards. The function named EDGE and Sobel operator was used in the pre-processing of the saved image  then method of median filter was used in the course of image de-noising and 53H filter was adopted in the signal analysis. The diameter of laser spot was obtained by the method above  the diameter is 5.56mm and the standard deviation is 0.24mm. The spot center excursion is 0.56mm  it is 10.43% of the total diameter of the laser spot. At last  the key factors of the energy dissipation in the focusing system can be summarized as follows: restriction of the diffraction limit  attenuation in the atmosphere  geometrical aberration of optical system  and the diffraction limit and the geometrical aberration are significant in the three factors above  so we can reduce the impact of the both factors during the design of optical system. The reliable referenced data of the system design can be acquired through the primary experiment research. 2010 SPIE.  
The full hemisphere integrating measurement of the reflectance of black cavity (EI CONFERENCE) 会议论文  OAI收割
ICO20: Illumination, Radiation, and Color Technologies, August 21, 2005 - August 26, 2005, Changchun, China
作者:  
Wang Y.;  Yu B.;  Wang Y.;  Wang Y.;  Wang Y.
收藏  |  浏览/下载:21/0  |  提交时间:2013/03/25
The conical black cavities are used in the Solar Irradiance Absolute Radiometers (SIARs) of the solar constant monitor aboard on the SZ spaceship and of the Solar Total Irradiance Monitor (STIM) aboard on sun-synchronous polar orbit weather satellites. A low reflectance measurement instrument which is used for making the integrating measurement on the reflectance of the conical black cavity in a high precision within the full hemisphere (include the entrance of the Ulbrichtsphere) has been constructed. The characteristic of the instrument is the employment of a semi-transparent mirror  which is mounted in an inclination angle of 45 degrees in front of the entrance of the Ulbrichtsphere. The incident beam is reflected to the black cavity or white board by the semi-transparent mirror. A portion of those  which is made diffused reflection through the black cavity or white board  is measured by the detector located in the side face of the Ulbrichtsphere  and the other portion which is reflected to the entrance is measured by the other detector  after passing through the semi-transparent mirror  and then being focused on by an ellipsoidal mirror. The two measurement data are added up to get the integrating reflectance within full hemisphere. The presentation and verification on the measurement result of the reflectance of the black cavity and its precision are described in this article. The absolute accuracy can reach 0.012%.  
Study on optical parts of MOEMS optical switch with low insertion loss (EI CONFERENCE) 会议论文  OAI收割
MEMS/MOEMS Technologies and Applications II, November 10, 2004 - November 12, 2004, Beijing, China
作者:  
Wang W.;  Wang L.;  Wang L.;  Wang L.;  Chen W.
收藏  |  浏览/下载:39/0  |  提交时间:2013/03/25
We study insertion losses of optical switch when the laser beam is propagating during the free space between two single mode fibers (SMFs) and the related assemblage challenges  Then a new packaging structure is developed for the hybrid-integration of free-space MOEMS (micro-opto-electro-mechanical systems) chip with a silicon micromachined submount to improve alignment accuracy. The submount is designed to accommodate various free-space MOEMS chips with minimal active optical alignment  thus reducing the packaging cost. The silicon submount has a central recess to place the MOEMS chip in  sixteen V-grooves for optical fibers  and micropits for micro ball lenses  all bulk micromachined at the same time by a single anisotropic wet etching step. A corner compensation technique is employed to prevent erosion of the convex corners  where different geometries meet. Through this assembling method  the fiber  micro ball lens can be aligned preciously thus reduced lateral and angular misalignment between them. Then total insertion losses can be decreased.  
Measurement of total cross sections of nuclei produced by Ne-20 bombing at Be-9 target 期刊论文  OAI收割
HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION, 2002, 卷号: 26, 期号: 7, 页码: 683-689
作者:  
Chen, ZQ;  Wang, M;  Tian, WD;  Wang, JS;  Sun, ZY
  |  收藏  |  浏览/下载:19/0  |  提交时间:2010/10/29
A single charge state ECR ion source 期刊论文  OAI收割
HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION, 1999, 卷号: 23, 期号: 11, 页码: 1125-1128
作者:  
Zhao, YB;  Liu, ZW;  Zhao, HW;  Ding, JZ;  Cao, Y
  |  收藏  |  浏览/下载:21/0  |  提交时间:2011/08/26
Scanning tunneling microscopy study of gaas(001) surfaces 期刊论文  iSwitch采集
Applied surface science, 1999, 卷号: 141, 期号: 3-4, 页码: 244-263
作者:  
Xue, QK;  Hashizume, T;  Sakurai, T
收藏  |  浏览/下载:31/0  |  提交时间:2019/05/09
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