Atomic and Molecular Pulsed Lasers最新文献_第7页

Temperature dependence of the absorption edge of synthetic diamond 合成金刚石吸收边的温度依赖性

Atomic and Molecular Pulsed Lasers Pub Date : 2021-12-02 DOI: 10.1117/12.2616516

E. A. Kolesnik, V. Ripenko, S. Dzyadukh, E. Lipatov

引用次数: 0

Study of the complexation reaction between substituted [2,2'-bipyridine]-6,6'-diyl(phosphonates) and terbium ions 取代[2,2'-联吡啶]-6,6'-二基膦酸盐与铽离子络合反应的研究

Atomic and Molecular Pulsed Lasers Pub Date : 2021-12-02 DOI: 10.1117/12.2613666

Tsagana B. Sumyanova, N. Borisova, A. Kirsanova

引用次数: 0

Numerical simulation of the optical radiation absorption by dielectric microcapsules of different spatial shapes 不同空间形状介质微胶囊对光辐射吸收的数值模拟

Atomic and Molecular Pulsed Lasers Pub Date : 2021-12-02 DOI: 10.1117/12.2601285

Y. Geints, E. K. Panina

{"title":"Numerical simulation of the optical radiation absorption by dielectric microcapsules of different spatial shapes","authors":"Y. Geints, E. K. Panina","doi":"10.1117/12.2601285","DOIUrl":"https://doi.org/10.1117/12.2601285","url":null,"abstract":"The heating dynamics a micron-sized two-layer capsules simulating transport microcontainers with water-containing load and light-absorbing composite shell exposed to a near-IR laser pulse (wavelength 800 nm) is theoretically studied. Both single microcapsules and the microassemblies of particles with various spatial shapes and different packing densities are considered. Using FDTD and FEM calculations, the numerical simulations of the optical field distribution inside and near the microcapsules are carried out, and the temporal dynamics of the temperature profiles of microparticles shells is obtained. Based on the simulation results, one can conclude that the particle morphology introduces specificity in the spatial profile of the optical field and the distribution of light absorption regions. Variation in the geometric shape of a capsule leads to dramatic changes in the distribution of absorbed light energy and, accordingly, particle temperature field. In order to increase the efficiency of absorption of optical radiation in capsule volume and to obtain the maximum heating of absorbing shells, the capsules of cubic, cylindrical and partly rectangular shapes are preferable. Thus, having a 100-fs laser pulse with energy of only 20 μJ it becomes possible to heat a cylindrical microcapsule to the temperature of thermal destruction of its polymeric shell (~ 410 K). Worthwhile notice, the water-filling of a capsule core remains cold. At the same conditions, the ellipsoid-shaped capsule is heated to multiple lower temperatures (~ 340 K).","PeriodicalId":205170,"journal":{"name":"Atomic and Molecular Pulsed Lasers","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124646918","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

Comparison of visible spectra of the accelerating gap of a pulsed electron accelerator in a vacuum diode with cathodes made of different materials 阴极材料不同的真空二极管中脉冲电子加速器加速间隙可见光谱的比较

Atomic and Molecular Pulsed Lasers Pub Date : 2021-12-02 DOI: 10.1117/12.2616673

I. Egorov, A. Klimkin, A. Poloskov, D. Pomazkin, M. Serebrennikov, M. Trigub

引用次数: 0

Femtosecond filamentation dynamics of synthesized coronary profile laser beam in air: numerical simulations 合成冠状激光束在空气中的飞秒成丝动力学:数值模拟

Atomic and Molecular Pulsed Lasers Pub Date : 2021-12-02 DOI: 10.1117/12.2601461

Y. Geints, A. Zemlyanov

引用次数: 0

The calculation of the characteristics of the air refractive index fluctuations along line of sight for multiconjugated adaptive optics 多共轭自适应光学系统空气折射率沿视线波动特性的计算

Atomic and Molecular Pulsed Lasers Pub Date : 2019-12-11 DOI: 10.1117/12.2554697

A. Shikhovtsev, A. Kiselev, D. Kolobov, P. Kovadlo, I. Russkih, E. Kopylov

引用次数: 0

Super-atmospheric pressure CO2 lasers with duration of radiation pulses less than 10 nanoseconds and pulse repetition rates up to 20 Hz 超大气压CO2激光器，其辐射脉冲持续时间小于10纳秒，脉冲重复率高达20赫兹

Atomic and Molecular Pulsed Lasers Pub Date : 2019-12-11 DOI: 10.1117/12.2550678

Quang Manh Do, B. Kozlov, T. N. Mai, A. Y. Payurov, A. Yastrebkov

引用次数: 0

Obtaining of micro-powder coatings from Fe-Ni and Fe-Cr alloys by pulse-periodic laser action 脉冲周期激光作用制备Fe-Ni和Fe-Cr合金微粉末涂层

Atomic and Molecular Pulsed Lasers Pub Date : 2019-12-11 DOI: 10.1117/12.2550426

M. Khomyakov, P. Pinaev, Aleksandr Smirnov, P. Statsenko, G. N. Grachev

{"title":"Obtaining of micro-powder coatings from Fe-Ni and Fe-Cr alloys by pulse-periodic laser action","authors":"M. Khomyakov, P. Pinaev, Aleksandr Smirnov, P. Statsenko, G. N. Grachev","doi":"10.1117/12.2550426","DOIUrl":"https://doi.org/10.1117/12.2550426","url":null,"abstract":"This paper presents the results of experimental research concerning the laser-plasma coating of steel substrate with the following powder grades: AP-FeCr4MnSiB (Fe71.75C4.81Cr3.33Si3.54B14.10Mn1.74V0.73), AP-FeCr11Mn4SiB (Fe66.8Mn2.84C2.85Si5.3B11.42Cr10.79), AP-FeNi19Mn10SiB (Fe56.12Ni15.82C1.65Si4.92B12.82Mn8.66) and AP-G14 (Fe29.4Ni32.24C5.32Cr14.78Si4.06B10.22Mo2.8W1.16). As a focusing head was used self-made lateral nozzle for feeding powder. The nozzle was used in conjunction with scanning the laser radiation in the direction perpendicular to the movement of the focusing head. Coated tracks with various nozzle head movement speed (7-20 mm/s) was obtained. The elemental compositions of the resulting coatings were studied. Alloying elements are uniform distributed throughout the coating. During surfacing the powder particles are completely melted and partially mixed with the base material. This leads to increased iron content in the resulting coatings compared with the original powder. The hardness and thickness of the deposited layers were measured depending on the speed of the process. The hardness of the coatings is in the range of 7-12 GPa, the thickness is 0.15-0.7 mm. The wear resistance of the resulting coatings is up to 10 times higher than that of a steel substrate.","PeriodicalId":205170,"journal":{"name":"Atomic and Molecular Pulsed Lasers","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116135372","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

Indirect action of VUV radiation on micro-organisms VUV辐射对微生物的间接作用

Atomic and Molecular Pulsed Lasers Pub Date : 2019-12-11 DOI: 10.1117/12.2548657

G. Zvereva, I. Y. Kirtsidely, E. Machs, E. Letova

{"title":"Indirect action of VUV radiation on micro-organisms","authors":"G. Zvereva, I. Y. Kirtsidely, E. Machs, E. Letova","doi":"10.1117/12.2548657","DOIUrl":"https://doi.org/10.1117/12.2548657","url":null,"abstract":"The contribution of the indirect mechanism to the inactivation of microorganisms by long wavelength VUV radiation (λ>170 nm) was investigated in this work. For these purposes dry spores of microscopic fungi Rhodotorula colostri and Saccharomyces cerevisiae were irradiated by Xe excilamp (λ= 173 nm).To determine the contribution of indirect action to the microfungi inactivation, the survival probabilities of the samples grown on a nutrient medium containing antioxidant (I2) and without it were carried out. The results have shown, that the survival probabilities of the spores containing antioxidant increases by no less than 20-25% compared to control ones. The increase value depends on VUV irradiation dose and microorganism type. It should be emphasized, that due to the masking of microfungi survival by I2 bactericidal action, the obtained survival probability increase values should be considered as a lower estimate. Electrophoresis of microfungi DNA have shown, that VUV irradiation of spores containing antioxidants leads to less DNA destruction and heaver DNA fragments appearance. The latter may indicate a decrease of reactive oxygen species effect on DNA in the presence of antioxidants. Atomic force microscopy and IR spectroscopy haven’t shown influence of antioxidant on cell wall destruction. This can indicate, that in contrast to wet spores, in the case of VUV irradiation of dry ones, the indirect mechanism of cell wall destruction is absent or weakly expressed.","PeriodicalId":205170,"journal":{"name":"Atomic and Molecular Pulsed Lasers","volume":"299 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122795092","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

Role of ozone in cryogenic plasma of carbon monoxide laser 臭氧在一氧化碳激光器低温等离子体中的作用

Atomic and Molecular Pulsed Lasers Pub Date : 2019-12-11 DOI: 10.1117/12.2543514

A. Ionin, I. Kinyaevskiy, Y. Klimachev, A. Kotkov, A. Kozlov, A. Kurnosov, D. Mokrousova, D. Sinitsyn

引用次数: 0