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Free-electron lasers and their applications

机译：自由电子激光器及其应用

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The Indo-French workshop brought together accelerator physicists and usersfrom the CLIO (Collaboration for an Infrared FEL at Orsay) Free-Electron Laser(FEL) in Orsay, France, accelerator physicists from the Compact Ultrafast Terahertz FEL (CUTE-FEL), and the latter'spotential users in India. CLIO is an infrared FEL facility that has been operatingfor the last fifteen years at wavelengthsfrom 3 to 100 murn. The CUTE-FEL is aterahertz FEL that is being built at theRaja Ramanna Centre for AdvancedTechnology. Ten scientists from Franceand twenty scientists and two studentsfrom India attended the workshop.The workshop commenced with introductory remarks by Shiva Prasad, Directorof IFCPAR, who welcomed the participants and briefed them on the objectivesof the Centre. J.-M. Ortega then spoke onthe CLIO FEL, emphasizing the uniquefeatures of the FEL-broadly tunablespectral range, appropriate pulse structureof picosecond pulses at MHz repetitionrate, and high peak and average power(around 10 MW and 10 W respectively).He also pointed out the importance ofvalue-addition to the facility by providing conventional lasers that are synchronized to the FEL pulses. S. Krishnagopaldescribed the parameters of the CUTE-FEL being developed in India, and briefedthe participants on the present status ofactivities. He emphasized the fact that amajor part of the effort has been in thedevelopment of the technology of thelinear accelerator and undulator that arepart of the FEL. A standing-wave PlaneWave Transformer (PWT) linac has beendeveloped, only the second in the world,and a 10 mA electron beam has been accelerated in this 21 cm long structure tc3.5 MeV, corresponding to an accelerating gradient of around 20 MV/m. A 5 cmperiod, 2.5 m long, planar undulator, us-ing NdFeB magnets, has also been builand characterized. The remaining talkson the first day were devoted to furtherdetails of the two FELs. There were alsotalks from V. B. Asgekar on undulatordevelopment and Cherenkov FEL activities at Pune University, and from RaviKumar on FEL-related activities at theInstitute for Plasma Research.
机译：印度法语研讨会在法国奥赛召集了加速器物理学家和CLIO（奥赛红外FEL合作）自由电子激光器（FEL）的使用者，紧凑型超快太赫兹FEL（CUTE-FEL）的加速器物理学家与后者在印度的潜在用户。 CLIO是红外线FEL设施，在过去15年中，其波长在3至100微米之间。 CUTE-FEL是aterahertz FEL，由Raja Ramanna高级技术中心制造。来自法国的10位科学家和来自印度的20位科学家和2位学生参加了研讨会。研讨会的开幕词是IFCPAR主任Shiva Prasad的介绍性讲话，欢迎与会者并向他们简要介绍了中心的目标。 J.-M.然后，奥尔特加（Ortega）在CLIO FEL上发表讲话，强调了FEL宽可调光谱范围的独特功能，皮秒脉冲在MHz重复频率下具有适当的脉冲结构以及高峰值和平均功率（分别约为10 MW和10 W）。他还指出了价值的重要性通过提供与FEL脉冲同步的常规激光器，对设备进行了补充。 S. Krishnagopal描述了印度正在开发的CUTE-FEL的参数，并向参与者简要介绍了活动的现状。他强调了这样一个事实，即大部分努力都在开发作为FEL一部分的线性加速器和波动器技术中。已经开发出了驻波平面波线性加速器（PWT）直线加速器，这仅是世界上第二个，并且在这种21厘米长的结构tc3.5 MeV中加速了10 mA电子束，对应于约20 MV / m的加速梯度米也有一个使用了钕铁硼磁体的5厘米周期，2.5 m长的平面波荡器进行了表征。第一天剩下的讲话者将专门讨论这两个FEL的细节。 V. B. Asgekar在浦那大学就起伏器的发展和Cherenkov FEL活动进行了演讲，在RaviKumar在等离子研究所进行了有关FEL相关活动的演讲。

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