Europe Optics + Optoelectronics最新文献_第5页

Laser accelerated ions from near critical gaseous targets 激光加速来自临界气体目标附近的离子

Europe Optics + Optoelectronics Pub Date : 2015-05-14 DOI: 10.1117/12.2178878

M. Helle, D. Gordon, D. Kaganovich, Y.-H. Chen, A. Ting

引用次数: 5

Betatron radiation from laser plasma accelerators 激光等离子体加速器产生的电子加速器辐射

Europe Optics + Optoelectronics Pub Date : 2015-05-14 DOI: 10.1117/12.2178685

F. Albert, B. Pollock, J. Shaw, K. Marsh, J. Ralph, A. Pak, C. Clayton, S. Glenzer, C. Joshi

引用次数: 0

Laser-driven Thomson scattering for the generation of ultra-bright multi-MeV gamma-ray beams 激光驱动的汤姆逊散射产生超亮的多兆电子伏特伽马射线束

Europe Optics + Optoelectronics Pub Date : 2015-05-14 DOI: 10.1117/12.2182569

G. Sarri, D. Corvan, J. Cole, W. Schumaker, A. Di Piazza, H. Ahmed, M. Yeung, Z. Zhao, C. Harvey, C. Keitel, K. Krushelnick, S. Mangles, Z. Najmudin, A. Thomas, M. Zepf

{"title":"Laser-driven Thomson scattering for the generation of ultra-bright multi-MeV gamma-ray beams","authors":"G. Sarri, D. Corvan, J. Cole, W. Schumaker, A. Di Piazza, H. Ahmed, M. Yeung, Z. Zhao, C. Harvey, C. Keitel, K. Krushelnick, S. Mangles, Z. Najmudin, A. Thomas, M. Zepf","doi":"10.1117/12.2182569","DOIUrl":"https://doi.org/10.1117/12.2182569","url":null,"abstract":"Compact γ-ray sources are of key importance not only for fundamental research but also for paramount practical applications such as cancer radiotherapy, active interrogation of materials, and high-energy radiography. Particular characteristics are required for meaningful implementation: multi-MeV energies per photon, a high degree of collimation, and a high peak brilliance. Laser-driven sources are theoretically expected to deliver such capabilities but experiments to date have reported either sub-MeV photon energies, or relatively low brilliance. By entering the non-linear regime of Thomson scattering, we report here on the first experimental realisation of a compact laser-driven γ-ray source that simultaneously ensures ultra-high brilliance (≈1019 photons s-1 mm-2 mrad-2 0.1% BW), low divergence (≈ mrad), and high photon energy (up to 18 MeV). The reported brilliance exceeds by two orders of magnitudes those of alternative mechanisms and it is the highest ever achieved in the multi-MeV regime in a laboratory experiment.","PeriodicalId":347374,"journal":{"name":"Europe Optics + Optoelectronics","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116465610","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

Simulations of ion acceleration from ultrathin targets with the VEGA petawatt laser 用VEGA千瓦激光器模拟超薄目标的离子加速

Europe Optics + Optoelectronics Pub Date : 2015-05-14 DOI: 10.1117/12.2178522

L. C. Stockhausen, R. Torres, E. Conejero Jarque

{"title":"Simulations of ion acceleration from ultrathin targets with the VEGA petawatt laser","authors":"L. C. Stockhausen, R. Torres, E. Conejero Jarque","doi":"10.1117/12.2178522","DOIUrl":"https://doi.org/10.1117/12.2178522","url":null,"abstract":"The Spanish Pulsed Laser Centre (CLPU) is a new high-power laser facility for users. Its main system, VEGA, is a CPA Ti:Sapphire laser which, in its final phase, will be able to reach petawatt peak powers in pulses of 30 fs with a pulse contrast of 1 : 1010 at 1 ps. The extremely low level of pre-pulse intensity makes this system ideally suited for studying the laser interaction with ultrathin targets. We have used the particle-in-cell (PIC) code OSIRIS to carry out 2D simulations of the acceleration of ions from ultrathin solid targets under the unique conditions provided by VEGA, with laser intensities up to 1022Wcm-2 impinging normally on 5 - 40 nm thick overdense plasmas, with different polarizations and pre-plasma scale lengths. We show how signatures of the radiation pressure dominated regime, such as layer compression and bunch formation, are only present with circular polarization. By passively shaping the density gradient of the plasma, we demonstrate an enhancement in peak energy up to tens of MeV and monoenergetic features. On the contrary linear polarization at the same intensity level causes the target to blow up, resulting in much lower energies and broader spectra. One limiting factor of Radiation Pressure Acceleration is the development of Rayleigh-Taylor like instabilities at the interface of the plasma and photon fluid. This results in the formation of bubbles in the spatial profile of laser-accelerated proton beams. These structures were previously evidenced both experimentally and theoretically. We have performed 2D simulations to characterize this bubble-like structure and report on the dependency on laser and target parameters.","PeriodicalId":347374,"journal":{"name":"Europe Optics + Optoelectronics","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130844293","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

Ultra-low emittance beam generation using two-color ionization injection in laser-plasma accelerators 激光等离子体加速器中双色电离注入产生超低发射度光束

Europe Optics + Optoelectronics Pub Date : 2015-05-14 DOI: 10.1117/12.2178577

C. Schroeder, C. Benedetti, S. Bulanov, Min Chen, E. Esarey, C. Geddes, J. Vay, Lule Yu, W. Leemans

引用次数: 10

Independent control of laser wakefield-accelerated electron-beam parameters 激光尾场加速电子束参数的独立控制

Europe Optics + Optoelectronics Pub Date : 2015-05-14 DOI: 10.1117/12.2182707

G. Golovin, Shouyuan Chen, N. Powers, Cheng Liu, S. Banerjee, Jun Zhang, M. Zeng, Z. Sheng, D. Umstadter

引用次数: 0

Laser generation of ultra-short neutron bursts from high atomic number converters 高原子序数转换器产生的超短中子爆发激光

Europe Optics + Optoelectronics Pub Date : 2015-05-14 DOI: 10.1117/12.2181494

I. Pomerantz, E. Mccary, A. Meadows, A. Arefiev, A. Bernstein, C. Chester, J. Cortez, M. Donovan, G. Dyer, E. Gaul, D. Hamilton, D. Kuk, A. Lestrade, C. Wang, T. Ditmire, B. Hegelich

引用次数: 4

Enhanced electron acceleration via ultra-intense laser interaction with structured targets 通过与结构目标的超强激光相互作用增强电子加速度

Europe Optics + Optoelectronics Pub Date : 2015-05-14 DOI: 10.1117/12.2178816

L. Fedeli, A. Sgattoni, G. Cantono, I. Prencipe, M. Passoni, O. Klimo, J. Proska, A. Macchi, T. Ceccotti

引用次数: 4

A compact “water-window” microscope with 60-nm spatial resolution based on a double stream gas-puff target and Fresnel zone plate optics 一个紧凑的“水窗”显微镜与60纳米空间分辨率基于双流气体喷射器目标和菲涅耳带板光学

Europe Optics + Optoelectronics Pub Date : 2015-05-12 DOI: 10.1117/12.2181431

P. Wachulak, A. Torrisi, M. Nawaz, D. Adjei, A. Bartnik, J. Kostecki, Ł. Węgrzyński, Š. Vondrová, J. Turňová, T. Fok, A. Jancarek, H. Fiedorowicz

{"title":"A compact “water-window” microscope with 60-nm spatial resolution based on a double stream gas-puff target and Fresnel zone plate optics","authors":"P. Wachulak, A. Torrisi, M. Nawaz, D. Adjei, A. Bartnik, J. Kostecki, Ł. Węgrzyński, Š. Vondrová, J. Turňová, T. Fok, A. Jancarek, H. Fiedorowicz","doi":"10.1117/12.2181431","DOIUrl":"https://doi.org/10.1117/12.2181431","url":null,"abstract":"Radiation with shorter illumination wavelength allows for extension of the diffraction limit towards nanometer scale, which is a straightforward way to significantly improve a spatial resolution in photon based microscopes. Soft X-ray (SXR) radiation, from the so called ”water window” spectral range, λ=2.3-4.4 nm, which is particularly suitable for biological imaging due to natural optical contrast, providing much better spatial resolution than one obtained with visible light microscopes. The high contrast is obtained because of selective absorption of radiation by carbon and water, being constituents of the biological samples. We present a desk-top system, capable of resolving 60 nm features in few seconds exposure time. We exploit the advantages of a compact, laser-plasma SXR source, based on a double stream nitrogen gas puff target, developed at the Institute of Optoelectronics, Military University of Technology. The source, emitting quasi-monochromatic, incoherent radiation, in the “water widow” spectral range at λ = 2.88 nm, is coupled with ellipsoidal, grazing incidence condenser and Fresnel zone plate objective. The construction of the microscope with some recent images of test and real samples will be presented and discussed.","PeriodicalId":347374,"journal":{"name":"Europe Optics + Optoelectronics","volume":"93 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":"116950450","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

Time-resolved EUV spectra from nitrogen Z-pinching capillary discharge 氮螯合z毛细管放电的时间分辨EUV光谱

Europe Optics + Optoelectronics Pub Date : 2015-05-12 DOI: 10.1117/12.2196905

M. Nevrkla, A. Jancarek, F. Nawaz, T. Parkman, M. Vrbova

引用次数: 3