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Bulletin of the Lebedev Physics Institute最新文献

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Laser Wakefield Acceleration in a Plasma Channel 等离子体通道中的激光韦克菲尔德加速
IF 0.4 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2023-10-07 DOI: 10.3103/S1068335623180057
M. S. Dorozhkina, K. V. Baluev, D. D. Kutergin, I. K. Lotov, V. A. Minakov, R. I. Spitsyn, P. V. Tuev, K. V. Lotov
{"title":"Laser Wakefield Acceleration in a Plasma Channel","authors":"M. S. Dorozhkina,&nbsp;K. V. Baluev,&nbsp;D. D. Kutergin,&nbsp;I. K. Lotov,&nbsp;V. A. Minakov,&nbsp;R. I. Spitsyn,&nbsp;P. V. Tuev,&nbsp;K. V. Lotov","doi":"10.3103/S1068335623180057","DOIUrl":"10.3103/S1068335623180057","url":null,"abstract":"<p>It is shown by numerical simulations that, if a laser pulse from the eXawatt Center for Extreme Light Studies (Sarov) is used as a driver for a laser wakefield accelerator, an electron bunch with a charge of 50 pC can be accelerated to energy of 100 GeV with an energy spread of less than 1%. To this end, it is necessary to form a plasma channel 70 m long with a characteristic radius of 200 μm and a plasma density of 3 × 10<sup>15</sup> cm<sup>–3</sup> on the axis. In a denser plasma, the acceleration rate is higher, but the acceleration length and the resulting energy are smaller. The accelerator parameters can be numerically optimized using a quasistatic model describing the laser pulse in terms of its envelope, which reduces the computation time by several orders of magnitude as compared to complete models.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"50 6","pages":"S715 - S723"},"PeriodicalIF":0.4,"publicationDate":"2023-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41088610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Bell-Shaped Refractive Index Profiles of Multimode Optical Fibers and Method for Calculating Their Optical Properties 多模光纤的钟形折射率分布及其光学性质的计算方法
IF 0.4 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2023-10-07 DOI: 10.3103/S1068335623170049
V. M. Gololobov, V. S. Motolygin, V. V. Zemlyakov, J. Gao
{"title":"Bell-Shaped Refractive Index Profiles of Multimode Optical Fibers and Method for Calculating Their Optical Properties","authors":"V. M. Gololobov,&nbsp;V. S. Motolygin,&nbsp;V. V. Zemlyakov,&nbsp;J. Gao","doi":"10.3103/S1068335623170049","DOIUrl":"10.3103/S1068335623170049","url":null,"abstract":"<p>Optical properties of multimode fibers with refractive index profiles represented by a wide class of bell-shaped analytical functions are investigated. We consider profiles with different curvatures, which are described by functions such as the Fermi–Dirac distributions, Gaussian, cycloid, and a family of hyperbolic functions. Main approaches to determining the solutions to the eigenvalue problem are described. Comparative analysis of optical properties of a set of fiber modes is presented, and their advantages and disadvantages in fiber-optic data transmission systems are considered.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"50 5","pages":"S624 - S634"},"PeriodicalIF":0.4,"publicationDate":"2023-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41088704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
International Exawatt Center for Extreme Light Studies (XCELS): Laser System and Experiment Program 国际极端光研究中心（XCELS）：激光系统和实验项目
IF 0.4 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2023-10-07 DOI: 10.3103/S1068335623180136
I. Yu. Kostyukov, E. A. Khazanov, A. A. Shaikin, A. G. Litvak, A. M. Sergeev
{"title":"International Exawatt Center for Extreme Light Studies (XCELS): Laser System and Experiment Program","authors":"I. Yu. Kostyukov,&nbsp;E. A. Khazanov,&nbsp;A. A. Shaikin,&nbsp;A. G. Litvak,&nbsp;A. M. Sergeev","doi":"10.3103/S1068335623180136","DOIUrl":"10.3103/S1068335623180136","url":null,"abstract":"<p>The goal of the XCELS (eXawatt Center for Extreme Light Studies) project is to establish a large-scale scientific infrastructure based on laser sources with gigantic peak power. A brief description of the laser system and the radiation focusing system from different channels, taking into account their synchronization, is presented. The program of possible experiments at the XCELS facility is discussed, including experiments to test strong-field quantum electrodynamics, particle acceleration, radiation generation in less accessible regions of the electromagnetic spectrum, laboratory astrophysics, high-energy-density processes, extreme light diagnostics, and other applications.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"50 6","pages":"S635 - S640"},"PeriodicalIF":0.4,"publicationDate":"2023-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41088485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Instability of High-Order Optical Phase and Polarization Singularities in a Homogeneous Linear Medium 均匀线性介质中高阶光学相位的不稳定性和偏振奇异性
IF 0.4 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2023-10-07 DOI: 10.3103/S1068335623170116
N. N. Rosanov
{"title":"Instability of High-Order Optical Phase and Polarization Singularities in a Homogeneous Linear Medium","authors":"N. N. Rosanov","doi":"10.3103/S1068335623170116","DOIUrl":"10.3103/S1068335623170116","url":null,"abstract":"<p>The development of the instability of beams of monochromatic radiation with high-order singularities in a homogeneous isotropic linear medium is analyzed. The results are compared with those for nonlinear media, and the possibility of experiment is discussed.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"50 5","pages":"S594 - S598"},"PeriodicalIF":0.4,"publicationDate":"2023-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41088622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optimization of Cavity Parameters of High-Power InGaAs/AlGaAs/GaAs Laser Diodes (λ = 1060 nm) for Efficient Operation at Ultrahigh Pulsed Pump Currents 高功率InGaAs/AlGaAs/GaAs激光二极管（λ=1060nm）在超高脉冲泵浦电流下高效工作的腔参数优化
IF 0.4 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2023-10-07 DOI: 10.3103/S1068335623170153
S. O. Slipchenko, O. S. Soboleva, V. S. Golovin, N. A. Pikhtin
{"title":"Optimization of Cavity Parameters of High-Power InGaAs/AlGaAs/GaAs Laser Diodes (λ = 1060 nm) for Efficient Operation at Ultrahigh Pulsed Pump Currents","authors":"S. O. Slipchenko,&nbsp;O. S. Soboleva,&nbsp;V. S. Golovin,&nbsp;N. A. Pikhtin","doi":"10.3103/S1068335623170153","DOIUrl":"10.3103/S1068335623170153","url":null,"abstract":"<p>Using the developed 2D numerical model of laser diodes, we study the effect of the cavity characteristics on the loss, and analyze the choice of the cavity parameters for efficient operation of the laser at ultrahigh pump currents. It is shown that at a fixed pump-current amplitude, a maximum output power is achieved for a combination of the optimal cavity parameters, namely, the cavity length <i>L</i><sub>opt</sub> and the output mirror reflectivity <i>R</i><sub>ARopt</sub>. It is found that the possibility of increasing the power by reducing the <i>R</i><sub>AR</sub> coefficient is limited due to the formation of a local region of high optical loss and recombination loss currents near the cavity face with a high reflectivity.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"50 5","pages":"S535 - S546"},"PeriodicalIF":0.4,"publicationDate":"2023-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41088470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Quasi-CW, High-Power, Extended-Cavity Laser Diode Microarrays (λ = 976 nm) Based on Asymmetric Heterostructures with an Ultrawide Waveguide 基于超宽波导非对称异质结构的准连续大功率扩展腔激光二极管阵列（λ=976nm）
IF 0.4 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2023-10-07 DOI: 10.3103/S106833562317013X
S. O. Slipchenko, A. A. Podoskin, V. A. Kryuchkov, V. A. Strelets, I. S. Shashkin, N. A. Pikhtin
{"title":"Quasi-CW, High-Power, Extended-Cavity Laser Diode Microarrays (λ = 976 nm) Based on Asymmetric Heterostructures with an Ultrawide Waveguide","authors":"S. O. Slipchenko,&nbsp;A. A. Podoskin,&nbsp;V. A. Kryuchkov,&nbsp;V. A. Strelets,&nbsp;I. S. Shashkin,&nbsp;N. A. Pikhtin","doi":"10.3103/S106833562317013X","DOIUrl":"10.3103/S106833562317013X","url":null,"abstract":"<p>We report the development of laser diode microarrays with a cavity length of 6 mm, which include emitting regions 5 × 100 μm in size with a fill factor of 25%. It is found that in the range of pump-current pulse durations of 1.0–9.5 ms (a repetition rate of 10 Hz) and a pump-current amplitude up to 50 A, a high lasing efficiency is maintained, corresponding to the slope of the light–current characteristic of 1.03 W/A, with a maximum peak power reaching 48.4 W. A possibility is demonstrated of the microarray operation in a quasi-CW regime with an increase in the heatsink temperature up to 100°C and with the linearity of the light–current characteristic at a power of 25.7 W and a pump current of 42 A. A high uniformity of the radiation intensity distribution in the far field is shown with a vertical divergence angle (at the FWHM level) of about 13° and a lateral divergence angle of about 8°.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"50 5","pages":"S520 - S526"},"PeriodicalIF":0.4,"publicationDate":"2023-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41088482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Epidermis of Plant Leaves on Their Interaction Efficiency with Low-Intensity Laser Light 植物叶片表皮对低强度激光相互作用效率的影响
IF 0.4 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2023-10-07 DOI: 10.3103/S1068335623170074
Yu. N. Kulchin, E. P. Subbotin, A. S. Kholin, S. O. Kozhanov, V. V. Demidchik, Yu. V. Trofimov, K. V. Kovalevskii, N. I. Subbotina, A. S. Gomol’skii
{"title":"Effect of Epidermis of Plant Leaves on Their Interaction Efficiency with Low-Intensity Laser Light","authors":"Yu. N. Kulchin,&nbsp;E. P. Subbotin,&nbsp;A. S. Kholin,&nbsp;S. O. Kozhanov,&nbsp;V. V. Demidchik,&nbsp;Yu. V. Trofimov,&nbsp;K. V. Kovalevskii,&nbsp;N. I. Subbotina,&nbsp;A. S. Gomol’skii","doi":"10.3103/S1068335623170074","DOIUrl":"10.3103/S1068335623170074","url":null,"abstract":"<p>The effect of low-intensity laser light on the optical anisotropy of the epidermis of plant leaves is studied. It is shown that a layer of plant cells of various cultures has an optical activity that can lead to a transformation of the polarization state of laser light and to a change in the nature of its interaction with the molecular system of the cell. The data obtained allow one to ascertain that the degree of polarization may depend on the cell structure and shape of plant epidermal cells. This is an important factor in the interaction of polarized laser light with proteins and enzymes in plant leaf cells, which are characterized by isomerism of physical and chemical properties.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"50 5","pages":"S613 - S623"},"PeriodicalIF":0.4,"publicationDate":"2023-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41088577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Locally Constant and Crossed-Field Approximation for Description of the Photon Emission in a Strong Oscillating Electric Field 描述强振荡电场中光子发射的局部常数和交叉场近似
IF 0.4 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2023-10-07 DOI: 10.3103/S1068335623170098
A. A. Mironov, E. G. Gel’fer, A. M. Fedotov
{"title":"Locally Constant and Crossed-Field Approximation for Description of the Photon Emission in a Strong Oscillating Electric Field","authors":"A. A. Mironov,&nbsp;E. G. Gel’fer,&nbsp;A. M. Fedotov","doi":"10.3103/S1068335623170098","DOIUrl":"10.3103/S1068335623170098","url":null,"abstract":"<p>The process of photon emission by a charged scalar particle (spinless analog of an electron) in a strong spatially homogeneous time-dependent electric field is considered. In the case where the emitting particle is ultrarelativistic and the field strength component oriented perpendicular to the particle motion direction is sufficiently large, the emission probability amplitude can be generally calculated within the locally constant field approximation (LCFA). By an example of a linearly polarized oscillating electric field, the applicability limits of this approximation are analyzed, and its predictions are compared with the results of numerical calculation of the process amplitude using the semiclassical solution of the Klein–Gordon equation in a time-dependent field.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"50 5","pages":"S587 - S593"},"PeriodicalIF":0.4,"publicationDate":"2023-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41088621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Calculation and Analysis of the Vacuum Polarization Signal in a Three-Beam Setup 三光束装置中真空偏振信号的计算与分析
IF 0.4 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2023-10-07 DOI: 10.3103/S1068335623180033
A. V. Berezin, A. M. Fedotov
{"title":"Calculation and Analysis of the Vacuum Polarization Signal in a Three-Beam Setup","authors":"A. V. Berezin,&nbsp;A. M. Fedotov","doi":"10.3103/S1068335623180033","DOIUrl":"10.3103/S1068335623180033","url":null,"abstract":"<p>We report the development of an efficient method for calculating the number and characteristics of photons emitted by a vacuum polarized by overlapping focused laser pulses. The dependence of the signal on the focusing and polarization of pulses is studied and optimized, and the possibility of its detection on the XCELS multipetawatt facility is substantiated.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"50 6","pages":"S641 - S651"},"PeriodicalIF":0.4,"publicationDate":"2023-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41088499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multistage Laser-Plasma Acceleration of Ultrashort Electron and Positron Bunches 超短电子束和正电子束的多级激光等离子体加速
IF 0.4 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2023-10-07 DOI: 10.3103/S1068335623180124
M. E. Veisman, I. R. Umarov, D. V. Pugacheva, N. E. Andreev
{"title":"Multistage Laser-Plasma Acceleration of Ultrashort Electron and Positron Bunches","authors":"M. E. Veisman,&nbsp;I. R. Umarov,&nbsp;D. V. Pugacheva,&nbsp;N. E. Andreev","doi":"10.3103/S1068335623180124","DOIUrl":"10.3103/S1068335623180124","url":null,"abstract":"<p>A version is proposed of multistage electron acceleration based on a multichannel laser facility with a peak laser pulse power of up to 15 PW in one channel. In contrast to strongly nonlinear acceleration regimes with the presence of electron density cavitation on the radiation propagation axis, the proposed moderately nonlinear regime will make it possible to achieve not only sufficiently high energies (60 to 100 GeV at three to five accelerator stages), but also a high quality of accelerated electron bunches (relative energy spread of maximum 1%, and normalized emittance maximum 1 mm ⋅ mrad), which is important for numerous applications such as precision tests of the Standard Model, experiments on quantum electrodynamics (generation of electron–positron pairs), and experiments on the development of high-power sources of short-wavelength (gamma quanta) radiation. The implementation of the project will allow to closely approach the studies that are important for the development of theory and modern practical applications. A preliminary analytical analysis and numerical simulation confirm the achievability of these parameters of electron bunches in case of the implementation of the proposed project.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"50 6","pages":"S724 - S733"},"PeriodicalIF":0.4,"publicationDate":"2023-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41088616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","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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