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Bulletin of the Lebedev Physics Institute最新文献

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Concentration of Soft X-rays by Conical Pores in Track Membranes 径迹膜中锥形孔对软x射线的富集
IF 0.7 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-09-21 DOI: 10.3103/S1068335625602286
A. V. Mitrofanov, R. M. Feshchenko
{"title":"Concentration of Soft X-rays by Conical Pores in Track Membranes","authors":"A. V. Mitrofanov,&nbsp;R. M. Feshchenko","doi":"10.3103/S1068335625602286","DOIUrl":"10.3103/S1068335625602286","url":null,"abstract":"<p>We study the propagation of soft X-rays in conical hollow through nano- and micropores of polymer track membranes. The distribution of the field amplitude and the transmission coefficient of the conical structures are determined. The problem is of interest for two reasons. First, the conical shape of pores in track membranes is the norm rather than an exception to the rule. It is determined by the final ratio of the etching rates of the intact polymer and the membrane material in the track region. Secondly, the concentration of soft X-rays at the output from the conical pores of the sample has been scarcely studied. Calculations are performed for porous membranes made of polyethylene terephthalate at wavelengths of 13.3 and 30.4 nm at normal incidence of radiation on the pore end and at various angles of the pore cone. Examples of calculations for oblique incidence of radiation on the sample are presented, and the effect of the damaged pore wall layer on the calculation results is discussed.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 8","pages":"361 - 366"},"PeriodicalIF":0.7,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145090698","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
Spectrum of Galactic Particles in the 10‒500 TeV Energy Range from the Results of Reprocessing of the Data Obtained by the Stratospheric X-ray Emulsion Chamber Method 平流层x射线乳化室法数据再处理结果的10-500 TeV能量范围内星系粒子谱
IF 0.7 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-09-21 DOI: 10.3103/S1068335625602341
I. S. Zayarnaya
{"title":"Spectrum of Galactic Particles in the 10‒500 TeV Energy Range from the Results of Reprocessing of the Data Obtained by the Stratospheric X-ray Emulsion Chamber Method","authors":"I. S. Zayarnaya","doi":"10.3103/S1068335625602341","DOIUrl":"10.3103/S1068335625602341","url":null,"abstract":"<p>We present a spectrum of primary galactic particles with energies of 10 TeV &lt; <i>E</i><sub>0</sub> &lt; 500 TeV, obtained from the data of reprocessing of events related to nucleon‒nucleus interactions measured in four X-ray emulsion chambers (RECs) exposed in the stratosphere at ∼10 g/cm<sup>2</sup> for 6‒7 days in the Russian‒Japanese RUNJOB balloon experiment. The spectrum agrees within statistical errors with the proton spectrum published on the results of the final processing of the RUNJOB experiment [1]. The presented spectrum of galactic particles includes events with found and missing single-charged primary particles in nucleon‒nucleus interactions, and is compared with the spectrum constructed only from events with detected primary protons and the final spectrum of the cosmic ray proton component of the RUNJOB experiment.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 8","pages":"347 - 350"},"PeriodicalIF":0.7,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145090699","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
Study of the Photocatalytic Degradation and the Enhanced Antibacterial Activity Against Septicemia of Sm-Doped ZnO Nanoparticles sm掺杂ZnO纳米粒子的光催化降解及对败血症的增强抗菌活性研究
IF 0.7 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-09-21 DOI: 10.3103/S1068335625602079
A. Jasmine, P. Baskaran, M. Karunakaran, L. Bruno Chandrasekar, J. Thirumalai, T. Balakrishnan, P. Shunmuga Sundaram, J. Merciline Leonora, Sonaimuthu Mohandoss, Subramanian Palanisamy
{"title":"Study of the Photocatalytic Degradation and the Enhanced Antibacterial Activity Against Septicemia of Sm-Doped ZnO Nanoparticles","authors":"A. Jasmine,&nbsp;P. Baskaran,&nbsp;M. Karunakaran,&nbsp;L. Bruno Chandrasekar,&nbsp;J. Thirumalai,&nbsp;T. Balakrishnan,&nbsp;P. Shunmuga Sundaram,&nbsp;J. Merciline Leonora,&nbsp;Sonaimuthu Mohandoss,&nbsp;Subramanian Palanisamy","doi":"10.3103/S1068335625602079","DOIUrl":"10.3103/S1068335625602079","url":null,"abstract":"<p>The present work reported the preparation of Sm-doped zinc oxide (ZnO:Sm) nanoparticles using a chemical precipitation method. Particle size, morphology, luminescence and optical properties are studied. The role of doping concentration on the antibacterial and photocatalytic properties is explored. The atomic doping concentration of Sm is chosen as 0, 1, 3, and 5%. The uniformity and grain sizes of the prepared nanoparticles are effectively controlled by doping. Violet, blue and greenish yellow emissions are observed in the photoluminescence spectrum. The band gap of the material ranges from 3.322 to 3.143 eV as the doping concentration of Sm changes from 0 to 5%. The electron and hole concentrations are examined. The prepared nanoparticles have a high refractive index and are examined using various models. Antibacterial studies against the bacteria that cause the disease septicemia have been reported. The enhanced photocatalytic performance is observed. A maximum of 94% of the degradation of methylene blue is obtained using ZnO:Sm (5%) nanoparticles.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 8","pages":"383 - 394"},"PeriodicalIF":0.7,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145090703","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
Investigation of Radiation Stability of UV Optical Materials for Thermonuclear Power Plant with KrF Laser Driver at a Linear 10-MeV Electron Accelerator. Part I. Adaptation of the Accelerator and Dose Characteristics of Irradiation 用KrF激光在10-MeV直线电子加速器上研究热核电厂用紫外光学材料的辐射稳定性。第一部分：加速器的适应与辐照剂量特性
IF 0.7 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-09-21 DOI: 10.3103/S1068335625602924
V. D. Zvorykin, S. V. Arlantsev, V. V. Khankin, V. I. Shvedunov, N. N. Ustinovskii
{"title":"Investigation of Radiation Stability of UV Optical Materials for Thermonuclear Power Plant with KrF Laser Driver at a Linear 10-MeV Electron Accelerator. Part I. Adaptation of the Accelerator and Dose Characteristics of Irradiation","authors":"V. D. Zvorykin,&nbsp;S. V. Arlantsev,&nbsp;V. V. Khankin,&nbsp;V. I. Shvedunov,&nbsp;N. N. Ustinovskii","doi":"10.3103/S1068335625602924","DOIUrl":"10.3103/S1068335625602924","url":null,"abstract":"<p>After achieving thermonuclear ignition in inertial confinement fusion (ICF), a new stage of research began, the ultimate goal of which is creation of an industrial ICF reactor for generating electric energy. This work is devoted to radiation stability of the optical components of ICF reactor chamber and a promising KrF laser driver as one of the unsolved problems along this path. The adaptation of a ten-megaelectronvolt pulsed linear electron accelerator with an average power of 15 kW for testing a number of optical materials transparent to UV radiation of KrF laser is described. With a peak electron beam power of 4 MW and a repetition rate of 8-μs pulses of 50 Hz, the accelerator provided a maximum dose rate of electron irradiation of materials of 2.5 kGy/s at controlled temperature of optical samples under conditions close to the operation of KrF laser driver windows. The results of current and dosimetric measurements are in good agreement with Monte Carlo calculations.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 4 supplement","pages":"S341 - S350"},"PeriodicalIF":0.7,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145100826","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
Generation of High-Power Terahertz Radiation in the Relativistic Regime of Laser-Electron Acceleration in a Gas-Cluster Target 高能太赫兹辐射在气团靶中激光电子加速的相对论性条件下的产生
IF 0.7 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-09-21 DOI: 10.3103/S1068335625602948
M. M. Nazarov, T. A. Semenov, P. A. Shcheglov, M. V. Chashchin, A. A. Tausenev, D. A. Sidorov-Biryukov, A. V. Mitrofanov, A. V. Lazarev, V. M. Gordienko
{"title":"Generation of High-Power Terahertz Radiation in the Relativistic Regime of Laser-Electron Acceleration in a Gas-Cluster Target","authors":"M. M. Nazarov,&nbsp;T. A. Semenov,&nbsp;P. A. Shcheglov,&nbsp;M. V. Chashchin,&nbsp;A. A. Tausenev,&nbsp;D. A. Sidorov-Biryukov,&nbsp;A. V. Mitrofanov,&nbsp;A. V. Lazarev,&nbsp;V. M. Gordienko","doi":"10.3103/S1068335625602948","DOIUrl":"10.3103/S1068335625602948","url":null,"abstract":"<p>We report efficient (∼10<sup>–4</sup>) generation of terahertz (THz) radiation under relativistic laser irradiation of nitrogen and oxygen gas-cluster targets. The relationship between the THz radiation yield and the process of laser-plasma generation of a megaelectronvolt electron beam, the divergence of which depends on the target density, has been studied. For a femtosecond laser beam intensity of ∼10<sup>19</sup> W/cm<sup>2</sup>, an energy of 20 μJ is recorded in the frequency range from 0.1 to 3 THz at an accelerated electron bunch charge of nanocoulomb units. Directionality and polarization of the THz pulse, as well as the dependence of its energy on the gas type, pressure, power, and duration of the pump pulse, are measured.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 4 supplement","pages":"S364 - S376"},"PeriodicalIF":0.7,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145100827","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
Generation of Symmetrical Binary Emulsion Droplets 对称二元乳化液滴的生成
IF 0.7 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-09-21 DOI: 10.3103/S1068335624602243
V. M. Dorogotovtsev
{"title":"Generation of Symmetrical Binary Emulsion Droplets","authors":"V. M. Dorogotovtsev","doi":"10.3103/S1068335624602243","DOIUrl":"10.3103/S1068335624602243","url":null,"abstract":"<p>The paper examines conditions for obtaining a precursor of polymer microcapsules of binary emulsion droplets with specified geometric parameters and acceptable droplet dispersion symmetry in coaxial capillary systems. The conditions for generating droplets of a given size and the factors affecting the droplet symmetry during dispersion are analyzed. The flows of droplet-forming phases and a dispersed medium necessary for obtaining emulsion droplets with specified parameters are estimated. The ways of improving the model determining the flow rate of dispersion and dispersed phases in the process of coaxial dispersion are shown. Alternative processes of droplet splitting are analyzed from the point of view of generating droplets with acceptable symmetry. It is shown that the compositions of droplet-forming phases can be optimized by using the capillary number of the spinning regime.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 8","pages":"377 - 382"},"PeriodicalIF":0.7,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145090701","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
Laser Diffraction Imaging of Highly Ionized Plasma Microchannels in a Pulsed Nanosecond Gas Discharge 脉冲纳秒气体放电中高电离等离子体微通道的激光衍射成像
IF 0.7 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-09-21 DOI: 10.3103/S1068335625602092
S. Yu. Gavrilov, E. V. Parkevich, A. I. Khirianova
{"title":"Laser Diffraction Imaging of Highly Ionized Plasma Microchannels in a Pulsed Nanosecond Gas Discharge","authors":"S. Yu. Gavrilov,&nbsp;E. V. Parkevich,&nbsp;A. I. Khirianova","doi":"10.3103/S1068335625602092","DOIUrl":"10.3103/S1068335625602092","url":null,"abstract":"<p>We discuss the key principles of laser diffraction imaging of plasma microchannels with a high degree of ionization, arising during a pulsed nanosecond gas discharge and registered at a wavelength of 1064 nm. The direct problem of laser radiation diffraction on a model plasma microchannel is solved numerically, and the propagation of diffracted radiation in an optical lens system up to the image plane of the object is described. Important properties of diffraction patterns of plasma microchannels obtained in the optical lens system are demonstrated, which can be used for their processing and subsequent accurate reconstruction of the plasma permittivity distributions. The results can be of wide interest for the development of new precision methods for optical imaging of rapidly evolving phase micro-objects.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 4 supplement","pages":"S474 - S482"},"PeriodicalIF":0.7,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145100668","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
Synthesis of Laser-Induced Graphene Using a 450 nm Diode Laser 利用450 nm二极管激光器合成激光诱导石墨烯
IF 0.7 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-09-21 DOI: 10.3103/S1068335625601931
V. M. Styapshin, I. A. Zlobin, K. G. Mikheev, E. I. Ryabov, G. M. Mikheev
{"title":"Synthesis of Laser-Induced Graphene Using a 450 nm Diode Laser","authors":"V. M. Styapshin,&nbsp;I. A. Zlobin,&nbsp;K. G. Mikheev,&nbsp;E. I. Ryabov,&nbsp;G. M. Mikheev","doi":"10.3103/S1068335625601931","DOIUrl":"10.3103/S1068335625601931","url":null,"abstract":"<p>The results of experiments on the synthesis of laser-induced graphene (LIG) on the surface of polyimide film via pyrolysis induced by radiation from commercial pulsed diode lasers with a wavelength of 450 nm, operating in either line-by-line or raster regime, are presented. To better understand the unique aspects of LIG synthesis using diode lasers, an investigation was conducted into the operations of three distinct models of laser heads. It is demonstrated that the surface morphology, thickness, and hydrophilicity of LIG film structures synthesized in either a line-by-line or raster regime differ significantly from one another. The thickness of LIG films synthesized in the raster regime is not uniform over the area, with a variation reaching ±60% of the average value. In the line-by-line regime, LIG films about 130 μm thick have been produced with a scatter of ±20%. Regardless of the incident fluence, the LIG synthesized in the raster regime is hydrophobic. In the line-by-line regime, both hydrophilic and hydrophobic LIG films can be produced depending on fluence.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 4 supplement","pages":"S429 - S440"},"PeriodicalIF":0.7,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145100707","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
IF 0.7 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-09-21
{"title":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 8","pages":"351 - 360"},"PeriodicalIF":0.7,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145090705","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
Enhancing Laser Wavefront Parameters in Experiments Using a New-Generation Multichannel Laser Facility 利用新一代多通道激光设备增强实验中的激光波前参数
IF 0.7 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-09-21 DOI: 10.3103/S1068335625603000
S. A. Belkov, V. O. Vasyukevich, G. N. Kachalin, A. O. Lipatov, A. N. Manachinsky, Yu. V. Shagalkin, A.V. Yakhlov
{"title":"Enhancing Laser Wavefront Parameters in Experiments Using a New-Generation Multichannel Laser Facility","authors":"S. A. Belkov,&nbsp;V. O. Vasyukevich,&nbsp;G. N. Kachalin,&nbsp;A. O. Lipatov,&nbsp;A. N. Manachinsky,&nbsp;Yu. V. Shagalkin,&nbsp;A.V. Yakhlov","doi":"10.3103/S1068335625603000","DOIUrl":"10.3103/S1068335625603000","url":null,"abstract":"<p>This paper describes a high-power, multichannel solid-state laser setup. The characteristics of adaptive system elements within an eight-channel laser module are presented. A wavefront correction method at the output of the laser module’s amplifying path, using Zernicke polynomials, is described, investigated, and tested. The results of correcting 'thermal' aberrations in the amplification path caused by the heating of active elements were obtained experimentally. The amplitude of the wavefront, <i>PV</i> = 0.71 μm and its mean-square deviation from planar RMS = 0.11 μm. The results of testing the correction method for the remaining channels of the module are presented.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 4 supplement","pages":"S377 - S387"},"PeriodicalIF":0.7,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145100710","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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