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Status of PAL-XFEL PAL-XFEL状态
Europe Optics + Optoelectronics Pub Date : 2015-05-12 DOI: 10.1117/12.2183141
H. Kang, K.-W. Kim, I. Ko
{"title":"Status of PAL-XFEL","authors":"H. Kang, K.-W. Kim, I. Ko","doi":"10.1117/12.2183141","DOIUrl":"https://doi.org/10.1117/12.2183141","url":null,"abstract":"The PAL-XFEL, a 0.1-nm hard X-ray FEL facility consisting of a 10-GeV S-band linac, is being constructed in Pohang, South Korea. Its building construction was completed at the end of 2014. The major procurement contracts were complete for the critical components of S-band linac modules and undulators. The installation of linac, undulator, and beam line will be completed by 2015. The commissioning will get started in January 2016 aiming for the first lasing in 2016. We will report the current status, construction progress, and commissioning plans for the PAL XFEL project, including major subsystem preparations.","PeriodicalId":347374,"journal":{"name":"Europe Optics + Optoelectronics","volume":"9512 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131149482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Characterization of partially coherent ultrashort XUV pulses 部分相干超短XUV脉冲的特性
Europe Optics + Optoelectronics Pub Date : 2015-05-12 DOI: 10.1117/12.2182428
C. Bourassin-Bouchet, M. Couprie
{"title":"Characterization of partially coherent ultrashort XUV pulses","authors":"C. Bourassin-Bouchet, M. Couprie","doi":"10.1117/12.2182428","DOIUrl":"https://doi.org/10.1117/12.2182428","url":null,"abstract":"Modern ultrafast metrology relies on the postulate that the pulse to be measured is fully coherent, i.e. that it can be completely described by its spectrum and spectral phase. However, synthesizing fully coherent pulses is not always possible in practice, especially in the domain of emerging ultrashort X-ray sources where temporal metrology is strongly needed. As an example, the lack of longitudinal coherence, that is shot-to-shot fluctuations, of Free-Electron Lasers (FEL) has prevented so far their full amplitude and phase temporal characterization. To sort out this issue, we have adapted Frequency-Resolved Optical Gating (FROG), the first and one of the most widespread techniques for pulse characterization, to enable the measurement of partially coherent XUV pulses even down to the attosecond timescale. Especially, this technique allows one to overcome the sources of decoherence that normally prevent a pulse measurement, such as the spectrometer resolution or the presence of XUV/laser arrival time jitter.","PeriodicalId":347374,"journal":{"name":"Europe Optics + Optoelectronics","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131866570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Characterization of the in-line x-ray phase contrast imaging beam line developed at ALLS and based on laser driven betatron radiation 在ALLS开发的基于激光驱动的betatron辐射的在线x射线相衬成像光束线的特性
Europe Optics + Optoelectronics Pub Date : 2015-05-12 DOI: 10.1117/12.2087603
S. Fourmaux, K. Otani, A. Saraf, S. MacLean, M. Wesołowski, P. Babyn, E. Hallin, A. Król, J. Kieffer
{"title":"Characterization of the in-line x-ray phase contrast imaging beam line developed at ALLS and based on laser driven betatron radiation","authors":"S. Fourmaux, K. Otani, A. Saraf, S. MacLean, M. Wesołowski, P. Babyn, E. Hallin, A. Król, J. Kieffer","doi":"10.1117/12.2087603","DOIUrl":"https://doi.org/10.1117/12.2087603","url":null,"abstract":"The 200TW ALLS laser system (30 fs, 5J) is used to accelerate electrons through laser wakefield and generate betatron emission in the 10keV range. Single shot phase contrast images of a series of nylon fibers with diameter ranging from 10μm to 400μm have been obtained in different geometries and are interpreted with a comprehensive model of x-ray propagation integrating the properties and geometries of the imaging beam line. A simple figure of merit, which can give indication on the interface sharpness of a phase object, is used to assess the quality of the imaging beam line.","PeriodicalId":347374,"journal":{"name":"Europe Optics + Optoelectronics","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133172455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Amplification of picosecond pulses to 100 W by an Yb:YAG thin-disk with CVBG compressor 用带CVBG压缩器的Yb:YAG薄板将皮秒脉冲放大到100w
Europe Optics + Optoelectronics Pub Date : 2015-05-12 DOI: 10.1117/12.2178900
M. Smrž, M. Chyła, O. Novák, T. Miura, A. Endo, T. Mocek
{"title":"Amplification of picosecond pulses to 100 W by an Yb:YAG thin-disk with CVBG compressor","authors":"M. Smrž, M. Chyła, O. Novák, T. Miura, A. Endo, T. Mocek","doi":"10.1117/12.2178900","DOIUrl":"https://doi.org/10.1117/12.2178900","url":null,"abstract":"High average power picosecond lasers have become an import tool in many fields of science and industry. We report on progress in development of 100 kHz, 100 W picosecond Yb:YAG thin disk laser amplifier with fundamental spatial mode at the HiLASE laser center. More efficient direct pumping to an upper laser level has been employed in order to suppress thermal loading of the thin disk active medium and to increase system stability. We also carefully analyzed and described all benefits of this so called zero phonon line pumping (ZPL) for fundamental spatial mode cavity design and successfully increased extraction efficiency of the amplifier to > 28 %. A novel approach of high-power picosecond pulse compression using a space saving and easy-to-align chirped-volume Bragg grating (CVBG) with high dispersion and high net efficiency approaching 88 % allowed us to build a robust and highly compact pulse compressor. A 100 kHz train of sub-1-milijoule pulses compressed bellow 2 ps (FWHM) in almost diffraction limited Gaussian beam has been successfully generated from this highly compact (900 x 1200 mm) thin-disk-based Yb:YAG regenerative amplifier.","PeriodicalId":347374,"journal":{"name":"Europe Optics + Optoelectronics","volume":"126 13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124039150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 18
Temperature dependent absorption measurement of various transition metal doped laser materials 各种过渡金属掺杂激光材料的温度依赖性吸收测量
Europe Optics + Optoelectronics Pub Date : 2015-05-12 DOI: 10.1117/12.2178608
L. Horáčková, J. Šulc, H. Jelínková, V. Jambunathan, A. Lucianetti, T. Mocek
{"title":"Temperature dependent absorption measurement of various transition metal doped laser materials","authors":"L. Horáčková, J. Šulc, H. Jelínková, V. Jambunathan, A. Lucianetti, T. Mocek","doi":"10.1117/12.2178608","DOIUrl":"https://doi.org/10.1117/12.2178608","url":null,"abstract":"In recent years, there has been a vast development of high energy class lasers of the order of 100 J to kJ level which have potential applications in the field of science and technology. Many such systems use the gain media cooled at cryogenic temperatures which will help in enhancing the spectroscopic and thermo-optical properties. Nevertheless, parasitic effects like amplified spontaneous emission enhance and affect the overall efficiency. The best way to suppress this effect is to use cladding element attached to the gain material. Based on these facts, this work was focused on the systematic investigation of temperature dependent absorption of several materials doped with transition metals, which can be used as cladding, as laser gain material, or as passive Q-switching element. The Ti:sapphire, Cr:YAG, V:YAG, and Co:MALO samples were measured in temperature range from 80 K to 330 K by step of 50 K. Using Beer-Lambert law we estimated the absorption coefficient of these materials.","PeriodicalId":347374,"journal":{"name":"Europe Optics + Optoelectronics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114105901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
The new design of the THz streak camera at PSI PSI的太赫兹条纹相机的新设计
Europe Optics + Optoelectronics Pub Date : 2015-05-12 DOI: 10.1117/12.2182204
I. Gorgisyan, P. Juranić, R. Ischebeck, A. Stepanov, V. Schlott, C. Pradervand, L. Patthey, M. Radović, R. Abela, C. Hauri, B. Monoszlai, R. Ivanov, P. Peier, J. Liu, T. Togashi, S. Owada, K. Ogawa, T. Katayama, M. Yabashi, L. Rivkin
{"title":"The new design of the THz streak camera at PSI","authors":"I. Gorgisyan, P. Juranić, R. Ischebeck, A. Stepanov, V. Schlott, C. Pradervand, L. Patthey, M. Radović, R. Abela, C. Hauri, B. Monoszlai, R. Ivanov, P. Peier, J. Liu, T. Togashi, S. Owada, K. Ogawa, T. Katayama, M. Yabashi, L. Rivkin","doi":"10.1117/12.2182204","DOIUrl":"https://doi.org/10.1117/12.2182204","url":null,"abstract":"SwissFEL is the Free Electron Laser (FEL) facility under construction at the Paul Scherrer institute (PSI), aiming to provide users with X-ray pulses of lengths down to 2 femtoseconds at standard operation. The measurement of the length of the FEL pulses and their arrival time relative to the experimental laser is crucial for the pump-probe experiments carried out in such facilities. This work presents a new device that measures hard X-ray FEL pulses based on the THz streak camera concept. It describes the prototype setup called pulse arrival and length monitor (PALM) developed at PSI and tested in Spring-8 Angstrom Compact Free Electron Laser (SACLA) in Japan. Based on the first results obtained from the measurements, we introduce the new improved design of the second generation PALM setup that is currently under construction and will be used in SwissFEL photon diagnostics.","PeriodicalId":347374,"journal":{"name":"Europe Optics + Optoelectronics","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126148320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Narrow bandwidth and tunable hard x-rays from an all-laser-driven Thomson light source 窄带宽和可调谐硬x射线从全激光驱动的汤姆逊光源
Europe Optics + Optoelectronics Pub Date : 2015-05-12 DOI: 10.1117/12.2182696
D. Umstadter
{"title":"Narrow bandwidth and tunable hard x-rays from an all-laser-driven Thomson light source","authors":"D. Umstadter","doi":"10.1117/12.2182696","DOIUrl":"https://doi.org/10.1117/12.2182696","url":null,"abstract":"We report the results of experiments in which a single laser system is used to both accelerate electrons (0.5 GeV) and generate hard x-rays, by means of inverse Compton scattering. The x-rays are shown to have narrow bandwidth (50%) over a wide range of photon energies (50 keV -- 9 MeV). Results on the application of this novel source to x-ray radiography with high-resolution (< 5 micron) are also discussed.","PeriodicalId":347374,"journal":{"name":"Europe Optics + Optoelectronics","volume":"469 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124694355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
X-ray characterization of curved crystals for hard x-ray astronomy 硬x射线天文学中弯曲晶体的x射线表征
Europe Optics + Optoelectronics Pub Date : 2015-05-12 DOI: 10.1117/12.2179058
E. Buffagni, E. Bonnini, C. Ferrari, E. Virgilli, F. Frontera
{"title":"X-ray characterization of curved crystals for hard x-ray astronomy","authors":"E. Buffagni, E. Bonnini, C. Ferrari, E. Virgilli, F. Frontera","doi":"10.1117/12.2179058","DOIUrl":"https://doi.org/10.1117/12.2179058","url":null,"abstract":"Among the methods to focus photons the diffraction in crystals results as one of the most effective for high energy photons. An assembling of properly oriented crystals can form a lens able to focus x-rays at high energy via Laue diffraction in transmission geometry; this is a Laue lens. The x-ray diffraction theory provides that the maximum diffraction efficiency is achieved in ideal mosaic crystals, but real mosaic crystals show diffraction efficiencies several times lower than the ideal case due to technological problems. An alternative and convenient approach is the use of curved crystals. We have recently optimized an efficient method based on the surface damage of crystals to produce self-standing uniformly curved Si, GaAs and Ge tiles of thickness up to 2-3 mm and curvature radii R down to a few meters. We show that, for curved diffracting planes, such crystals have a diffraction efficiency nearly forty times higher than the diffraction efficiency of perfect similar flat crystals, thus very close to that of ideal mosaic crystals. Moreover, in an alternative configuration where the diffracting planes are perpendicular to the curved ones, a focusing effect occurs and will be shown. These results were obtained for several energies between 17 and 120 keV with lab sources or at high energy facilities such as LARIX at Ferrara (Italy), ESRF at Grenoble (France), and ANKA at Karlsruhe (Germany).","PeriodicalId":347374,"journal":{"name":"Europe Optics + Optoelectronics","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126768246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Optically induced Fe magnetization reversal in Fe/MnAs/GaAs(001) 光诱导铁在Fe/MnAs/GaAs中的磁化反转(001)
Europe Optics + Optoelectronics Pub Date : 2015-05-12 DOI: 10.1117/12.2184710
C. Spezzani, E. Ferrari, E. Allaria, F. Vidal, L. Lounis, A. Ciavardini, R. Delaunay, F. Capotondi, E. Pedersoli, M. Coreno, C. Svetina, L. Raimondi, M. Zangrando, R. Ivanov, I. Nikolov, A. Demidovich, M. Danailov, G. De Ninno, H. Popescu, M. Eddrief, M. Kiskinova, M. Sacchi
{"title":"Optically induced Fe magnetization reversal in Fe/MnAs/GaAs(001)","authors":"C. Spezzani, E. Ferrari, E. Allaria, F. Vidal, L. Lounis, A. Ciavardini, R. Delaunay, F. Capotondi, E. Pedersoli, M. Coreno, C. Svetina, L. Raimondi, M. Zangrando, R. Ivanov, I. Nikolov, A. Demidovich, M. Danailov, G. De Ninno, H. Popescu, M. Eddrief, M. Kiskinova, M. Sacchi","doi":"10.1117/12.2184710","DOIUrl":"https://doi.org/10.1117/12.2184710","url":null,"abstract":"Magnetization control without applying magnetic fields has potential for applications in sensors and devices. In Fe/MnAs/GaAs(001), the Fe magnetization can be modified by acting on the MnAs microstructure via temperature control, without applying external magnetic fields. Here we use an optical laser pulse to vary the local temperature and an x-ray free-electron laser pulse to probe the induced magnetic and structural dynamics in a time-resolved resonant scattering experiment, both pulses having ~100 fs duration. Modifications of the MnAs microstructure take place within a few ps, followed by a slower dynamics driven by thermal diffusion. We show that a single optical laser pulse can reverse the Fe magnetization locally, the process being driven not by the fast modifications of the MnAs structure, but rather by its slower return to equilibrium.","PeriodicalId":347374,"journal":{"name":"Europe Optics + Optoelectronics","volume":"140 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121756469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Development of a mode-locked fiber laser system for a high finesse enhancement cavity 高精细度增强腔锁模光纤激光系统的研制
Europe Optics + Optoelectronics Pub Date : 2015-05-12 DOI: 10.1117/12.2178619
R. Suzuki, T. Kobayashi, K. Sakaue, M. Washio, A. Endo
{"title":"Development of a mode-locked fiber laser system for a high finesse enhancement cavity","authors":"R. Suzuki, T. Kobayashi, K. Sakaue, M. Washio, A. Endo","doi":"10.1117/12.2178619","DOIUrl":"https://doi.org/10.1117/12.2178619","url":null,"abstract":"We have been studying a high finesse enhancement cavity for photon target of Laser Compton Scattering X-ray generation. It is very important to develop an extremely stable external optical cavity for laser Compton scattering. At the same time, a stable seed laser oscillator for an incident laser of an optical cavity is also very important tissue. Thus, we have been developing a stabil mode-locked Yb-doped fiber laser based on Non-Linear Polarization Rotation. We have generated laser pulses which have 102.9mW average power at repetition rate of 119MHz. Furthermore, we started accumulating lasers in the optical cavity, and we have already confirmed that our oscillator is able to accumulate in the cavity.","PeriodicalId":347374,"journal":{"name":"Europe Optics + Optoelectronics","volume":"57 9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123268579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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