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Evolution of Individual Fractions in the Distribution of Metal Nanoparticles during Their Laser Fragmentation
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-03-18 DOI: 10.3103/S1068335625600081
K. O. Aiyyzhy, E. V. Barmina, P. S. Kuleshov, G. A. Shafeev
{"title":"Evolution of Individual Fractions in the Distribution of Metal Nanoparticles during Their Laser Fragmentation","authors":"K. O. Aiyyzhy,&nbsp;E. V. Barmina,&nbsp;P. S. Kuleshov,&nbsp;G. A. Shafeev","doi":"10.3103/S1068335625600081","DOIUrl":"10.3103/S1068335625600081","url":null,"abstract":"<p>The paper presents a concept of laser fragmentation of metal nanoparticles in liquids by nanoseconds pulses and demonstrates evolution of individual fractions in the nanoparticle size distributions. The concept is based on the capillary-wave mechanism for the formation of fractions of fragments of initial particles. The presented results of theoretical simulation are in good agreement with the experimental data.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 12 supplement","pages":"S1070 - S1083"},"PeriodicalIF":0.6,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645455","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
Features of X-Ray Spectra of Copper in Laser Plasma and a Hybrid X-Pinch
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-03-18 DOI: 10.3103/S1068335625600044
I. N. Tilikin, T. A. Shelkovenko, A. A. Rupasov, A. M. Chekmarev, S. A. Pikuz
{"title":"Features of X-Ray Spectra of Copper in Laser Plasma and a Hybrid X-Pinch","authors":"I. N. Tilikin,&nbsp;T. A. Shelkovenko,&nbsp;A. A. Rupasov,&nbsp;A. M. Chekmarev,&nbsp;S. A. Pikuz","doi":"10.3103/S1068335625600044","DOIUrl":"10.3103/S1068335625600044","url":null,"abstract":"<p>The results of studies of the copper spectra in the soft X-ray range in two fundamentally different (they differ in the heating method) high-temperature dense objects with high energy densities, laser plasma and a hybrid X-pinch, are presented. The uniqueness of the conducted experiments is that both sources were created at the Lebedev Physical Institute, Russian Academy of Sciences (FIAN), and are currently actively operating. The use of the same measuring equipment, which was also invented at FIAN, in these experiments made it possible to completely eliminate the influence of the conditions for observing and recording spectra on the obtained results. Calculations of the spectra have been performed using the radiation–collision model, from which it follows that only if a large number of transitions followed by averaging the obtained numerical results are taken into account, the results can be compared with the experimental data. It has been shown that it is necessary to take not only the plasma temperature and density into account when comparing the theory and particular experimental results, but the plasma size and shape must also be considered. Only in this case, it becomes possible to simulate the experimentally obtained results with satisfactory accuracy. In this case, it is possible to obtain information on the size of the emitting plasma region, which was never done previously.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 12 supplement","pages":"S975 - S982"},"PeriodicalIF":0.6,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645470","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
Technological Features of Selective Laser Etching in the Processes of Internal Modification of Optical Quartz
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-03-18 DOI: 10.3103/S1068335625600093
S. S. Lyubin, M. A. Murzakov, I. I. Ryashko, D. A. Antipov, D. Yu. Kuznetsova
{"title":"Technological Features of Selective Laser Etching in the Processes of Internal Modification of Optical Quartz","authors":"S. S. Lyubin,&nbsp;M. A. Murzakov,&nbsp;I. I. Ryashko,&nbsp;D. A. Antipov,&nbsp;D. Yu. Kuznetsova","doi":"10.3103/S1068335625600093","DOIUrl":"10.3103/S1068335625600093","url":null,"abstract":"<p>A selective laser etching (SLT) technology has been developed and successfully applied for precision processing of quartz glass up to 2 mm thick. The technology has demonstrated efficiency for two operations: cutting and punching holes. The following parameters have been achieved: roughness, <i>Ra</i> = 0.2 μm and <i>Rz</i> = 0.4 μm; deviation from perpendicularity, 1°; and cutting width, from 10 to 45 μm. Technological intervals for pulse energy, speed, and frequency at which selective etching is possible have been identified. The maximum etching rate of laser-modified quartz glass with a hydrofluoric acid solution is 225 μm/h, indicating a selectivity of about 47 compared to the original glass.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 12 supplement","pages":"S1061 - S1069"},"PeriodicalIF":0.6,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645410","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
Processes of Terahertz Radiation Generation during Emission of a Bunch of Electrons Accelerated by a Short Laser Pulse from a Metal/Plasma Target
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-03-18 DOI: 10.3103/S1068335624602723
A. V. Brantov, V. Yu. Bychenkov
{"title":"Processes of Terahertz Radiation Generation during Emission of a Bunch of Electrons Accelerated by a Short Laser Pulse from a Metal/Plasma Target","authors":"A. V. Brantov,&nbsp;V. Yu. Bychenkov","doi":"10.3103/S1068335624602723","DOIUrl":"10.3103/S1068335624602723","url":null,"abstract":"<p>A consistent description of terahertz (THz) radiation generation by laser-accelerated electrons from a target irradiated by a short light pulse requires a complete understanding of the contribution of all processes of interaction between emitted relativistic electrons and the target, taking into account the arising self-consistent fields. Despite the fact that the dominant role in this radiation is assumed a priori to be due to transition radiation from electrons leaving the target, in addition to this mechanism, it is necessary to estimate a set of such processes as bremsstrahlung of trapped electrons accelerating and decelerating in the Debye sheath, as well as their transition radiation and synchrotron radiation during the rotation of the double sheath field. This paper, which relies on a physically justified qualitative analysis, does not pretend to be a strict quantitative calculation and uses methodological techniques that aid understanding. Estimates are also presented that allow one to assess the characteristics of the generated THz pulse.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 12 supplement","pages":"S969 - S974"},"PeriodicalIF":0.6,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645469","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
Dye Laser Pumping by Semiconductor Injection Lasers
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-03-18 DOI: 10.3103/S106833562560010X
O. A. Burdukova, V. A. Petukhov, M. A. Semenov
{"title":"Dye Laser Pumping by Semiconductor Injection Lasers","authors":"O. A. Burdukova,&nbsp;V. A. Petukhov,&nbsp;M. A. Semenov","doi":"10.3103/S106833562560010X","DOIUrl":"10.3103/S106833562560010X","url":null,"abstract":"<p>Semiconductor lasers are actively used for optical pumping of various solid-state lasers such as Nd:YAG, Nd:YVO<sub>4</sub>, Ti:Sapphire, Cr:Colquiriite, and Cr:Alexandrite among others. Diode pumping reduces considerably the overall dimensions of laser systems and cuts their cost. There have been repeated attempts to excite dye lasers with semiconductor lasers, but the efficiency of such systems was extremely low due to lack of pump radiation power. Acceptable results were produced only after the advent of high-power visible semiconductor lasers (445 nm and 520 nm, Nichia). Application of various methods of pumping by semiconductor lasers produced wide tuning ranges of laser wavelength (~200 nm), achieved high-efficiency (26%) lasing, carried out diode pumping of a continuous dye laser, and demonstrated mode-locking (pulse duration of about 200 ps). The following is an overview of research on diode pumping of dye lasers.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 12 supplement","pages":"S994 - S1003"},"PeriodicalIF":0.6,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645523","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
Gamma-Ray Source Based on Laser Acceleration of Electrons from Targets with a Low-Density Plasma Layer
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-03-18 DOI: 10.3103/S1068335624602735
A. V. Brantov, M. A. Rakitina, S. I. Glazyrin, M. G. Lobok
{"title":"Gamma-Ray Source Based on Laser Acceleration of Electrons from Targets with a Low-Density Plasma Layer","authors":"A. V. Brantov,&nbsp;M. A. Rakitina,&nbsp;S. I. Glazyrin,&nbsp;M. G. Lobok","doi":"10.3103/S1068335624602735","DOIUrl":"10.3103/S1068335624602735","url":null,"abstract":"<p>We report a study of electron beams and gamma radiation generation from targets with a preplasma and from targets with an extended plasma of near-critical density on the irradiated side. It is shown that for a laser pulse with an energy of about 1 J, a uniform layer of critical density makes it possible to generate a significantly larger number of high-energy electrons compared to targets with an exponentially decaying preplasma profile produced by the prepulse. The bremsstrahlung gamma radiation spectra of accelerated electron beams in a converter target are constructed, and the possibility of converting the laser pulse energy into gamma radiation energy (with photon energies above 1 MeV) at a level of 5% is demonstrated.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 12 supplement","pages":"S1030 - S1036"},"PeriodicalIF":0.6,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645434","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
Dynamic and Spectral Features of Superluminescence under Optical Pumping at λ = 532 nm in Synthetic HPHT Diamond with NV¯ Centers
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-03-18 DOI: 10.3103/S1068335624602644
V. F. Lebedev, E. A. Vasiliev, Ya. A. Ryvkina, I. V. Klepikov, T. S. Misnikova, A. V. Kolyadin, V. G. Vins
{"title":"Dynamic and Spectral Features of Superluminescence under Optical Pumping at λ = 532 nm in Synthetic HPHT Diamond with NV¯ Centers","authors":"V. F. Lebedev,&nbsp;E. A. Vasiliev,&nbsp;Ya. A. Ryvkina,&nbsp;I. V. Klepikov,&nbsp;T. S. Misnikova,&nbsp;A. V. Kolyadin,&nbsp;V. G. Vins","doi":"10.3103/S1068335624602644","DOIUrl":"10.3103/S1068335624602644","url":null,"abstract":"<p>A comparative analysis has been made of the superluminescence spectra of two HPHT diamond samples with NV¯-centers with the concentration in the growth sectors {111} of NV¯-centers ≈10 ppm and of C-centers ≈ 45 ppm. A broad structureless superluminescence band with a maximum about 706 nm and a narrow band in the region of 705 to 720 nm were identified in the spectral range of 650–750 nm when excited by pulsed laser radiation at λ = 532 nm. It was found that the narrow-band superluminescence was not excited by pumping with continuous radiation at λ = 532 nm and the intensities of both types of superluminescence were summated under simultaneous pumping by continuous and pulsed radiation at λ = 532 nm. These data indicate either the different nature of the two types of superluminescence or that they belonged to NV¯ centers but with different excitation mechanisms. The existence of connection between the shape of the spectra of narrow-band superluminescence and of radiation pulses has been demonstrated. The observed features of narrow-band superluminescence are explained for the first time by the occurrence of mode-locking laser generation. The mode-locking laser generation without the use of reflective coatings on the sample or an external resonator on other laser materials has not been observed before.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 12 supplement","pages":"S1022 - S1029"},"PeriodicalIF":0.6,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645435","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
Development of Numerical Methods for Applications of Coherent Radiation in Studies of the Internal Structure of Objects (Part II)
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-03-18 DOI: 10.3103/S1068335625600123
A. S. Busarov, A. V. Vinogradov, N. L. Popov, I. A. Artyukov
{"title":"Development of Numerical Methods for Applications of Coherent Radiation in Studies of the Internal Structure of Objects (Part II)","authors":"A. S. Busarov,&nbsp;A. V. Vinogradov,&nbsp;N. L. Popov,&nbsp;I. A. Artyukov","doi":"10.3103/S1068335625600123","DOIUrl":"10.3103/S1068335625600123","url":null,"abstract":"<p>We consider single-beam 3D imaging, i.e., an approach to reconstructing the complex dielectric constant ε(<i>x</i>, <i>y</i>, <i>z</i>) of a sample in question by processing data read from a detector during successive illumination of a stationary object with different Gaussian beams along the same direction (angle). The propagation of Gaussian beams through an object is described using the parabolic wave equation. The equation for single-beam volume imaging is derived, which relates the data obtained on the detector with the values of the dielectric constants ε(<i>x</i>, <i>y</i>, <i>z</i>). As an example of solving this equation using optimization methods, a simplified case of purely real dielectric constant ε(<i>x</i>, <i>z</i>) in two-dimensional space is considered.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 12 supplement","pages":"S1010 - S1021"},"PeriodicalIF":0.6,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645542","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
Lasing on Metastable Neon Atoms with Pulsed Transverse Optical Pumping
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-03-18 DOI: 10.3103/S1068335624601936
A. P. Torbin, A. K. Chernyshov, N. I. Ufimtsev, M. I. Svistun, P. A. Mikheyev
{"title":"Lasing on Metastable Neon Atoms with Pulsed Transverse Optical Pumping","authors":"A. P. Torbin,&nbsp;A. K. Chernyshov,&nbsp;N. I. Ufimtsev,&nbsp;M. I. Svistun,&nbsp;P. A. Mikheyev","doi":"10.3103/S1068335624601936","DOIUrl":"10.3103/S1068335624601936","url":null,"abstract":"<p>Optically pumped metastable rare gas lasers (OPRGL) have been investigated. Lasing based on metastable neon (Ne*) atoms in a Ne–He mixture in a pulsed regime with transverse optical pumping was produced for the first time. Ne* was produced in the plasma of a nanosecond repetitively pulsed glow discharge with a frequency of 200 kHz. Pulsed optical pumping was provided by a dye laser at wavelengths corresponding to neon transitions of 1s<sub>5</sub> → 2p<sub>9</sub> (640.2 nm) and 1s<sub>5</sub> → 2p<sub>8</sub> (633.4 nm). The effect of various gain medium parameters on lasing characteristics was experimentally determined. Ne*–He OPRGL generation thresholds were measured by optical pump intensity of 1s<sub>5</sub> → 2p<sub>9</sub> and 1s<sub>5</sub> → 2p<sub>8</sub> transitions.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 12 supplement","pages":"S1037 - S1046"},"PeriodicalIF":0.6,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645456","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
The Effect of Pulse Duration on Properties of Boron Nanoparticles Produced by Laser Fragmentation of Micropowders in Liquids
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-03-03 DOI: 10.3103/S1068335624602784
K. O. Aiyyzhy, M. S. Savinov, G. V. Tikhonovsky, A. A. Popov, D. I. Tselikov, I. V. Sozaev, A. A. Laktionov, M. V. Gorban, E. V. Barmina, M. S. Grigorieva, I. N. Zavestovskaya, S. M. Klimentov, A. V. Kabashin
{"title":"The Effect of Pulse Duration on Properties of Boron Nanoparticles Produced by Laser Fragmentation of Micropowders in Liquids","authors":"K. O. Aiyyzhy,&nbsp;M. S. Savinov,&nbsp;G. V. Tikhonovsky,&nbsp;A. A. Popov,&nbsp;D. I. Tselikov,&nbsp;I. V. Sozaev,&nbsp;A. A. Laktionov,&nbsp;M. V. Gorban,&nbsp;E. V. Barmina,&nbsp;M. S. Grigorieva,&nbsp;I. N. Zavestovskaya,&nbsp;S. M. Klimentov,&nbsp;A. V. Kabashin","doi":"10.3103/S1068335624602784","DOIUrl":"10.3103/S1068335624602784","url":null,"abstract":"<p>Optimization of laser synthesis regimes producing colloidal solutions of boron nanoparticles for their application as a promising boron-containing agent of boron neutron capture therapy (BNCT) of oncological diseases is an up to date trend in BNCT advancement. In this study, colloidal solutions of boron nanoparticles (BNPs) were synthesized by laser fragmentation in organic solvents using laser pulses of nanosecond and femtosecond duration range. The powder of the stable <sup>10</sup>B isotope of submicron fractions with arbitrary surface morphology served as starting material in both cases. The dependence of the properties of produced nanomaterials on the duration of laser pulses was compared directly.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 11 supplement","pages":"S962 - S968"},"PeriodicalIF":0.6,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533199","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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