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Shanghai synchrotron radiation facility

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National Science Review 2014年第2期1卷 171-172页

作者： Jianhua He zhentang zhao Shanghai Institute of Applied Physics Chinese Academy of Sciences

Synchrotron radiation was discovered by chance at an electron synchrotron accelerator in *** irst experiments applying synchrotron radiation were conducted in the early 1960s,with measurements using synchrotron radiation for standards and as a source for ultraviolet wavelength *** radiation later atracted considerable interest for use in solid-state physics *** increased development of both facilities and applications,a surge of interest in synchrotron

关键词： SSRF In Shanghai synchrotron radiation facility

Hard X-ray free-electron laser based on echo-enabled staged harmonic generation scheme

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Chinese Science Bulletin 2010年第3期55卷 221-227页

作者： FENG Chao zhao zhentang Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

A novel approach to producing coherent hard X-ray based on the echo-enabled staged harmonic generation (EESHG) free-electron laser scheme is proposed. This scheme is not a simple cascaded echo-enabled harmonic generation (EEHG) but consists of an EEHG and a conventional high-gain harmonic generation (HGHG) like configuration, which also works in the EEHG principle. It is shown that fully coherent hard X-ray radiation can be obtained directly from a conventional VUV seed laser with reduced size and cost in comparison with the self-amplified spontaneous emission (SASE) based hard X-ray facilities.

关键词：硬X射线辐射自由电子激光谐波产生激光回波放大的自发辐射种子激光真空紫外高增益

Clock distribution and local oscillator of a digital low-level radio-frequency board for SSRF

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Nuclear Science and Techniques 2010年第1期21卷 7-10页

作者： FU Zechuan zhao Yubin LIU Jianfei zhao zhentang Shanghai Institute of AppliedPhysics Chinese Academy of Sciences Shanghai 201800 China Graduate University of Chinese Academy of Sciences Beijing 100049 China Shanghai Key Laboratory of Cryogenics ＆Superconducting FR Technology Shanghai 201800 China

In the storage ring RF system of Shanghai Synchrotron Radiation Facility,the clock distribution and the local oscillator are two parts of the digital low level radio frequency hardware *** this paper,we designed and produced the clock distribution and the local oscillator board using the AD9858 and AD9510 *** results show that the phase noise of the local oscillator signal is lower than 100dBc/Hz with 50 kHz offset.

关键词：上海同步辐射装置时钟分配本振信号电路板射频本地振荡器光源和数

Filling patterns in the SSRF storage ring

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Nuclear Science and Techniques 2010年第3期21卷 129-133页

作者： LIANG Yongnan JIANG Bocheng zhao zhentang Shanghai Institute of Applied Physics the Chinese Academy of Sciences Shanghai 201800 China Graduate School of the Chinese Academy of Sciences Beijing 100049 China

There are various filling patterns in a storage ring for the users' requirements and consideration of the machine performances,such as beam lifetime,instability and chamber *** effects have been experimentally studied in the SSRF storage ring for typical filling *** experiment results and general trends of observations discussed in this *** explanations of the results are given.

关键词：充填模式储存环光源上海机器性能束流寿命室内采暖不稳定

Design and experimental study of a C-band traveling-wave accelerating structure

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Chinese Science Bulletin 2011年第1期56卷 18-23页

作者： FANG WenCheng TONG DeChun GU Qiang zhao zhentang Shanghai Institute of Applied Physics (SINAP) Chinese Academy of Sciences Shanghai 201800 China Department of Engineering Physics Tsinghua University Beijing 100084 China Graduate University of Chinese Academy of Sciences Beijing 100039 China

Research and design of a C-band (5712 MHz) high-gradient traveling-wave accelerating structure is being carried out at Shanghai Institute of Applied Physics,Chinese Academy of *** structure consists of 53 regular disk-loaded cells and two waveguide couplers,and its length is about 1 *** paper presents a design method for the accelerating structure,an experimental model and the preliminary results of an RF cold test of the model structure.

关键词：加速结构设计方法行波实验物理研究所中国科学院波导耦合器高梯度

Design optimization of a C-band traveling-wave accelerating structure for a compact X-ray Free Electron Laser facility

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Chinese Science Bulletin 2011年第32期56卷 3420-3425页

作者： FANG WenCheng GU Qiang TONG DeChun zhao zhentang Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China＂ Department of Engineering Physics Tsinghua University Beijing 100084 China Graduate University of Chinese Academy of Sciences Beijing 100039 China

The research and development of a C-band (5712 MHz) high gradient traveling-wave accelerating structure has been in progress for some years at the Shanghai Institute of Applied Physics, Chinese Academy of Sciences. Conceptual design of the accelerating structure has been accomplished, and verified by cold testing an experimental model. The first prototype structure is now ready for high RF power tests. To develop a robust high gradient C-band accelerating structure, an optimized constant gradient structure with a 4 /5 operating mode for future X-ray Free Electron Laser facilities is proposed in this paper. This scheme can improve the breakdown stability and beam quality. The high power RF system, four operating modes and disk iris shape are analyzed and optimized.

关键词：自由电子激光加速结构优化设计 C波段 X射线设施行波紧凑型

A single stage EEHG at SXFEL for narrow-bandwidth soft X-ray generation

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Science Bulletin 2016年第15期61卷 1202-1212页

作者： Chao Feng Dazhang Huang Haixiao Deng Jianhui Chen Dao Xiang Bo Liu DongWang zhentang zhao Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China Department of Physics and Astronomy Key Laboratory for Laser Plasma Shanghai Jiao Tong University Shanghai 200240China

The echo-enabled harmonic generation （EEHG） scheme holds promising prospects for efficiently generat- ing intense coherent radiation at very high harmonics of the initial seed laser. In this paper, we study the feasibility of operating the Shanghai X-ray free-electron laser test facility with a single stage EEHG setup. With a combina- tion of existing numerical codes, start-to-end simulations considering various three-dimensional effects have been carried out to show the possible performance of the EEHG FEL. Simulation results demonstrate that a single stage EEHG can generate high power soft X-ray radiation pulses with narrow bandwidth directly from UV seed lasers. With the help of the harmonic lasing technique or upgraded linac, we also show the possibility of generating coherent soft X-ray radiation in the ＂water window＂ with a single stage EEHG.

关键词： X-ray free-electron lasers EEHG Coherent soft X-ray Harmonic lasing Waterwindow

Features and futures of X-ray free-electron lasers

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The Innovation 2021年第2期2卷 54-72页

作者： Nanshun Huang Haixiao Deng Bo Liu Dong Wang zhentang zhao Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China

Linear accelerator-based free-electron lasers(FELs)are the leading source of fully coherent X-rays with ultra-high peak powers and ultrashort pulse *** X-ray FEL facilities have proved their worth as useful tools for diverse scientific *** this paper,we present an overview of the features and future prospects of X-ray FELs,including the working principles and properties of X-ray FELs,the operational status of different FEL facilities worldwide,the applications supported by such facilities,and the current developments and outlook for X-ray FEL-based research.

关键词： lasers ultrashort free

Shanghai Synchrotron Radiation Facility

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Chinese Science Bulletin 2009年第22期54卷 4171-4181页

作者： JIANG MianHeng YANG Xiong XU HongJie zhao zhentang DING Hao Chinese Academy of Sciences Beijing 100864 China Shanghai Municipal Government Shanghai 200003 China Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China Shanghai Urban Construction & Communications Shanghai 200003 China

The Shanghai Synchrotron Radiation Facility (SSRF) is an intermediate energy, third generation light source located in Zhangjiang High-Tech Park, Shanghai. In December 2007, an electron beam was first stored and accumulated in the SSRF storage ring. Since then the accelerator commissioning and beam line installation had steadily progressed toward routine user operation in May 2009. This article presents an overview of the SSRF design, construction, commissioning and current status of its user operation.

关键词：上海同步辐射装置用户操作产业园区储存环光源高科技第三代电子束