Laser and Particle Beams最新文献_第2页

Study on Gain Regularity of High Power Microwave Obtained by Using Path Encoding Pulse Compression 利用路径编码脉冲压缩获得高功率微波增益规律的研究

IF 0.9 4区物理与天体物理

Laser and Particle Beams Pub Date : 2023-04-18 DOI: 10.1155/2023/9101258

Jinyong Fang, Chang Zhai, Jiangniu Wu, Haoliang Zhang, Huijun Huang

{"title":"Study on Gain Regularity of High Power Microwave Obtained by Using Path Encoding Pulse Compression","authors":"Jinyong Fang, Chang Zhai, Jiangniu Wu, Haoliang Zhang, Huijun Huang","doi":"10.1155/2023/9101258","DOIUrl":"https://doi.org/10.1155/2023/9101258","url":null,"abstract":"This study is the further research of the path encoding pulse compression technique. In this study, the regularity of pulse compression gain is studied by adopting the numerical simulation and experiment measurement methods. For the lossless cavity, the power gain has the characteristic of equal pulse length with equal compression gain contribution according to the numerical simulation results. It means that the pulse compression gain is increased linearly along with the time length of the input pulse. The obtained pulse power gains are equal for the two subpulses intercepted arbitrarily form the input pulse with equal time length for the pulse compression. For the lossy cavity, the power gain usually does not increase significantly after the length of input pulse reaches to a certain value. The gain contribution decreases gradually along with the increase of time length of input pulse until the growth rate of gain contribution equals to zero. Assuming two subpulses with equal time length were intercepted from the input pulse, the gain contribution of the earlier subpulse is lower than that of the later subpulse. The measured results verified the simulated gain contribution regularity according to the established experimental system.","PeriodicalId":49925,"journal":{"name":"Laser and Particle Beams","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75772891","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

Oscillating Plasmas for Proton- Boron Fusion in Miniature Vacuum Discharge 微型真空放电中质子-硼聚变的振荡等离子体

IF 0.9 4区物理与天体物理

Laser and Particle Beams Pub Date : 2023-03-04 DOI: 10.1155/2023/9563197

Y. Kurilenkov, V. Tarakanov, A. V. Oginov, S. Gus’kov, I. Samoylov

{"title":"Oscillating Plasmas for Proton- Boron Fusion in Miniature Vacuum Discharge","authors":"Y. Kurilenkov, V. Tarakanov, A. V. Oginov, S. Gus’kov, I. Samoylov","doi":"10.1155/2023/9563197","DOIUrl":"https://doi.org/10.1155/2023/9563197","url":null,"abstract":"Earlier, the experiments on the aneutronic proton-boron (pB) fusion in a miniature nanosecond vacuum discharge (NVD) with oscillatory plasma confinement and correspondent α particles yield were presented. In this work, we consider some specific features of oscillatory confinement as a relatively new type of plasma confinement for fusion. Particle-in-cell (PiC) simulations of pB fusion processes have shown that the plasma in NVD, and especially on the discharge axis, is in a state close to a quasineutral one, which is rather different from the conditions in the well-known scheme of periodically oscillating plasma spheres (POPSs) suggested earlier for fusion. Apparently, small-scale oscillations in NVD are a mechanism of resonant ion heating, unlike coherent compressions in the original POPS scheme. Nevertheless, the favorable scaling of the fusion power in NVD turns out to be close to the POPS fusion but differs significantly both in the compression ratio and in the values of the parameter of quasineutrality. In addition, unlike the POPS scheme, PiC simulation reveals that the distribution functions of protons and boron ions in NVD are non-Maxwellian. Therefore, we have an aneutronic pB synthesis in a nonequilibrium plasma remaining “nonignited” on the discharge axis.","PeriodicalId":49925,"journal":{"name":"Laser and Particle Beams","volume":"8 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76570124","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: 2

A Methodology for the Discrimination of Alpha Particles from Other Ions in Laser-Driven Proton-Boron Reactions Using CR-39 Detectors Coupled in a Thomson Parabola Spectrometer 汤姆逊抛物线谱仪耦合CR-39探测器在激光驱动质子-硼反应中识别α粒子和其他离子的方法

IF 0.9 4区物理与天体物理

Laser and Particle Beams Pub Date : 2023-02-27 DOI: 10.1155/2023/3125787

V. Kantarelou, A. Velyhan, P. Tchórz, M. Rosiński, G. Petringa, G. Cirrone, V. Istokskaia, J. Krása, M. Krůs, A. Picciotto, D. Margarone, L. Giuffrida

{"title":"A Methodology for the Discrimination of Alpha Particles from Other Ions in Laser-Driven Proton-Boron Reactions Using CR-39 Detectors Coupled in a Thomson Parabola Spectrometer","authors":"V. Kantarelou, A. Velyhan, P. Tchórz, M. Rosiński, G. Petringa, G. Cirrone, V. Istokskaia, J. Krása, M. Krůs, A. Picciotto, D. Margarone, L. Giuffrida","doi":"10.1155/2023/3125787","DOIUrl":"https://doi.org/10.1155/2023/3125787","url":null,"abstract":"Solid-state nuclear track detectors (CR-39 type) are frequently used for the detection of ions accelerated by laser-plasma interaction because they are sensitive to each single particle. To the present day, CR-39 detectors are the main diagnostics in experiments focused on laser-driven proton-boron (p11B) fusion reactions to detect alpha particles, which are the main products of such a nuclear reaction, and to reconstruct their energy distribution. However, the acceleration of multispecies ions in the laser-generated plasma makes this spectroscopic method complex and often does not allow to unambiguously discriminate the alpha particles generated from p11B fusion events from the laser-driven ions. In this experimental work, performed at the PALS laser facility (600 J, 300 ps, laser intensity 1016 W/cm2), CR-39 detectors were used as main detectors for the angular distribution of the produced alpha particles during a p11B fusion dedicated experimental campaign. Additionally, a CR-39 detector was set inside a Thomson Parabola (TP) spectrometer with the aim to calibrate the CR-39 response for low energetic laser-driven ions originating from the plasma in the given experimental conditions. The detected ion energies were ranging from hundreds of keV to a few MeV, and the ion track diameters were measured for etching times up to 9 hours. The goal of the test was the evaluation of the detectors’ ability to discriminate the alpha particles from the aforementioned ions. Within this study, the calibration curves for protons and silicon low energy ions are accomplished, the overlapping of the proton tracks and alpha particles is verified, and a methodology to avoid this problem is realized.","PeriodicalId":49925,"journal":{"name":"Laser and Particle Beams","volume":"59 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73823359","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: 4

Numerical Studies on Bow Waves in Intense Laser-Plasma Interaction 强激光等离子体相互作用中弓形波的数值研究

IF 0.9 4区物理与天体物理

Laser and Particle Beams Pub Date : 2023-02-15 DOI: 10.1155/2023/9414451

Liao Ning, Mu Jie, F. Kong

{"title":"Numerical Studies on Bow Waves in Intense Laser-Plasma Interaction","authors":"Liao Ning, Mu Jie, F. Kong","doi":"10.1155/2023/9414451","DOIUrl":"https://doi.org/10.1155/2023/9414451","url":null,"abstract":"Laser-driven wakefield acceleration (LWFA) has attracted lots of attention in recent years. However, few writers have been able to make systematic research into the bow waves generated along with the wake waves. Research about the bow waves will help to improve the understanding about the motion of the electrons near the wake waves. In addition, the relativistic energetic electron density peaks have great potential in electron acceleration and reflecting flying mirrors. In this paper, the bow waves generated in laser-plasma interactions as well as the effects of different laser and plasma parameters are investigated. Multidimensional particle-in-cell simulations are made to present the wake waves and bow waves by showing the electron density and momentum distribution as well as the electric field along x and y directions. The evolution of the bow wave structure is investigated by measuring the open angle between the bow wave and the wake wave cavity. The angle as well as the peak electron density and transverse momentum is demonstrated with respect to different laser intensities, spot sizes, plasma densities, and preplasma lengths. The density peak emits high-order harmonics up to 150 orders and can be a new kind of “flying mirror” to generate higher order harmonics. The study on the bow waves is important for further investigation on the electron motion around the wake waves, generation of dense electron beams, generation of high-order harmonics, and other research and applications based on the bow waves.","PeriodicalId":49925,"journal":{"name":"Laser and Particle Beams","volume":"39 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85135791","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: 1

Cross-Section Measurements of the 11B(p,α)2α Reaction near the First Resonant Energy 第一共振能量附近11B(p，α)2α反应的截面测量

IF 0.9 4区物理与天体物理

Laser and Particle Beams Pub Date : 2023-02-14 DOI: 10.1155/2023/9697329

Shizheng Zhang, Hao Xu, Xing Xu, Wenqing Wei, J. Ren, Benzheng Chen, B. Ma, Zhongming Hu, Fang Li, LI-RONG Liu, Minqiang Yang, Zeyu Lai, Hongwei Yue, Jie Xiong, Zhongfeng Xu, Yanhong Chen, Zhao Wang, Zexian Zhou, Lulin Shi, R. Cheng, Z. Deng, W. Qi, Weimin Zhou, Guanchao Zhao, Bing Liu, D. Luo, D. Hoffmann, Yong-tao Zhao

引用次数: 1

Model of a 5-MA Linear-Transformer-Driver Accelerator: Comparison of MITL Performance for Bremsstrahlung Electron Beam Diodes and Z-Pinch Loads 5毫安线性变压器驱动加速器模型:轫致电子束二极管和z箍缩负载的MITL性能比较

IF 0.9 4区物理与天体物理

Laser and Particle Beams Pub Date : 2023-01-31 DOI: 10.1155/2023/2021696

Zhenzhou Gong, Hao Wei, Siyuan Fan, Weibo Yao, Hanyu Wu, A. Qiu

{"title":"Model of a 5-MA Linear-Transformer-Driver Accelerator: Comparison of MITL Performance for Bremsstrahlung Electron Beam Diodes and Z-Pinch Loads","authors":"Zhenzhou Gong, Hao Wei, Siyuan Fan, Weibo Yao, Hanyu Wu, A. Qiu","doi":"10.1155/2023/2021696","DOIUrl":"https://doi.org/10.1155/2023/2021696","url":null,"abstract":"A transmission line circuit model was conducted to compare the performances of the two-level 2.5 Ω magnetically insulated transmission lines (MITLs) system of a 5-MA linear-transformer-driver (LTD) accelerator for two kinds of typical loads, including bremsstrahlung electron beam diodes and Z-pinch loads. Both the electron current loss in the pulse front during the magnetic insulation setup process and the electron flow distribution in the magnetic insulation steady state were analyzed. When the accelerator drives an electron beam diode load with impedance of 1.20 Ω (a single level), the duration of the magnetic insulation setup is about 12 ns, the current loss is about 130 kA in a single MITL level, the maximum electron flow current is about 50 kA in the end of MITL, and its amplitude decreases gradually after the steady magnetic insulation is established. When the accelerator drives a Z-pinch load with length of 1.5 cm, radius of 1.2 cm, and mass of 0.3 mg/cm, the duration of the magnetic insulation setup is almost zero, the maximum electron flow current in the end of MITL can reach about 55 kA (a single level), and the waveform of the electron flow resembles a saddle shape, which reaches the peak at the pinch stagnation time.","PeriodicalId":49925,"journal":{"name":"Laser and Particle Beams","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83328210","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

High-Sensitivity Thomson Spectrometry in Experiments of Laser-Driven Low-Rate NeutronLess Fusion Reactions 高灵敏度汤姆逊光谱法在激光驱动低速率无中子聚变反应实验中的应用

IF 0.9 4区物理与天体物理

Laser and Particle Beams Pub Date : 2023-01-13 DOI: 10.1155/2023/3531875

M. Scisciò, G. Di Giorgio, P. Andreoli, M. Cipriani, G. Cristofari, R. De Angelis, M. Salvadori, G. Cirrone, L. Giuffrida, D. Margarone, G. Milluzzo, G. Petringa, F. Consoli

{"title":"High-Sensitivity Thomson Spectrometry in Experiments of Laser-Driven Low-Rate NeutronLess Fusion Reactions","authors":"M. Scisciò, G. Di Giorgio, P. Andreoli, M. Cipriani, G. Cristofari, R. De Angelis, M. Salvadori, G. Cirrone, L. Giuffrida, D. Margarone, G. Milluzzo, G. Petringa, F. Consoli","doi":"10.1155/2023/3531875","DOIUrl":"https://doi.org/10.1155/2023/3531875","url":null,"abstract":"The aneutronic 11B(p, α)2α fusion reaction driven by the interaction of high-energy lasers with matter has become a popular topic of research, since it represents a potential long-term goal alternative to the most studied deuterium-tritium reaction. However, the detection of the typical ionic products, especially alpha particles, of this low-rate fusion reaction is a challenging issue, due to their low flux. One of the diagnostic devices that can be implemented in laser-driven proton-boron fusion experiments is a Thomson spectrometer (TS), which is capable of detecting and discriminating ions according to their mass-to-charge ratio (\u0000 \u0000 A\u0000 /\u0000 Z\u0000 \u0000 , where \u0000 \u0000 A\u0000 \u0000 is the mass number and \u0000 \u0000 Z\u0000 \u0000 is the atomic number of the ions). In this work, we report on the ultimate test of a TS, which was designed and developed at the ENEA Research Centre in Frascati, Italy, in the context of a p + 11B fusion experiment. Our device—designed to have high sensitivity and a robust shielding against electromagnetic pulses (EMPs)—was implemented at the PALS laser facility (∼700 J in ∼350 ps pulses) at a distance of 367 mm from the laser-plasma interaction point. We analyse here the measured signals obtained with our device, focusing on the assessment of their signal-to-background ratio. Despite the presence of strong EMPs and background radiation at such a short distance from the laser-irradiated target, the TS proved to be suitable for effectively detecting protons and heavier ions stemming from the plasma source.","PeriodicalId":49925,"journal":{"name":"Laser and Particle Beams","volume":"8 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81293256","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: 1

Path to Increasing p-B11 Reactivity via ps and ns Lasers 利用ps和ns激光提高p-B11反应性的途径

IF 0.9 4区物理与天体物理

Laser and Particle Beams Pub Date : 2022-12-24 DOI: 10.1155/2022/2355629

T. Mehlhorn, L. Labun, B. Hegelich, D. Margarone, M. Gu, D. Batani, E. Campbell, S. Hu

{"title":"Path to Increasing p-B11 Reactivity via ps and ns Lasers","authors":"T. Mehlhorn, L. Labun, B. Hegelich, D. Margarone, M. Gu, D. Batani, E. Campbell, S. Hu","doi":"10.1155/2022/2355629","DOIUrl":"https://doi.org/10.1155/2022/2355629","url":null,"abstract":"The Lawson criterion for proton-boron (p-11B) thermonuclear fusion is substantially higher than that for deuterium-tritium (DT) because the fusion cross section is lower and peaks at higher ion energies. The Maxwellian averaged p-11B reactivity peaks at several hundred keV, where bremsstrahlung radiation emission may dominate over fusion reactions if electrons and ions are in thermal equilibrium and the losses are unrestricted. Nonequilibrium burn has often been suggested to realize the benefits of this aneutronic reaction, but the predominance of elastic scattering over fusion reactivity makes this difficult to achieve. The development of ultrashort pulse lasers (USPL) has opened new possibilities for initiating nonequilibrium thermonuclear burns and significant numbers of p-11B alpha particles have been reported from several experiments. We present an analysis that shows that these significant alpha yields are the result of beam fusion reactions that do not scale to net energy gain. We further find that the yields can be explained by experimental parameters and recently updated cross sections such that a postulated avalanche mechanism is not required. We use this analysis to understand the underlying physics of USPL-driven nonequilibrium fusion reactions and whether they can be used to initiate fusion burns. We conclude by outlining a path to increasing the p-11B reactivity towards the goal of achieving ignition and describing the design principles that we will use to develop a computational point design.","PeriodicalId":49925,"journal":{"name":"Laser and Particle Beams","volume":"17 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74955498","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: 7

Manipulating the Laser-Driven Proton Bunch with Plasma Wakefield 用等离子体韦克菲尔德操纵激光驱动质子束

IF 0.9 4区物理与天体物理

Laser and Particle Beams Pub Date : 2022-12-19 DOI: 10.1155/2022/4286598

Chao Jin, Xiao-ying Zhao, Han Cai, X. Qi, Zhi-jun Wang, Yuan He

引用次数: 0

A Pulsed Synchronous Linear Accelerator for Low-Energy Proton 低能质子脉冲同步直线加速器

IF 0.9 4区物理与天体物理

Laser and Particle Beams Pub Date : 2022-11-09 DOI: 10.1155/2022/2836767

Yi Shen, Yi Liu, Pan Dong, Mao Ye, Huang Zhang, Liansheng Xia, Jinshui Shi, Jianjun Deng

引用次数: 0