Matter and Radiation at Extremes最新文献_第8页

Induction heating for desorption of surface contamination for high-repetition laser-driven carbon-ion acceleration 高重复激光驱动碳离子加速中表面污染的感应加热解吸

IF 5.1 1区物理与天体物理

Matter and Radiation at Extremes Pub Date : 2023-07-28 DOI: 10.1063/5.0153578

S. Kojima, T. Miyatake, H. Sakaki, Hiroyoshi Kuroki, Yusuke Shimizu, Hisanori Harada, N. Inoue, T. Dinh, M. Hata, N. Hasegawa, M. Mori, M. Ishino, M. Nishiuchi, K. Kondo, M. Nishikino, M. Kando, T. Shirai, K. Kondo

{"title":"Induction heating for desorption of surface contamination for high-repetition laser-driven carbon-ion acceleration","authors":"S. Kojima, T. Miyatake, H. Sakaki, Hiroyoshi Kuroki, Yusuke Shimizu, Hisanori Harada, N. Inoue, T. Dinh, M. Hata, N. Hasegawa, M. Mori, M. Ishino, M. Nishiuchi, K. Kondo, M. Nishikino, M. Kando, T. Shirai, K. Kondo","doi":"10.1063/5.0153578","DOIUrl":"https://doi.org/10.1063/5.0153578","url":null,"abstract":"This study reports the first experimental demonstration of surface contamination cleaning from a high-repetition supply of thin-tape targets for laser-driven carbon-ion acceleration. The adsorption of contaminants containing protons, mainly water vapor and hydrocarbons, on the surface of materials exposed to low vacuum (>10−3 Pa) suppresses carbon-ion acceleration. The newly developed contamination cleaner heats a 5-μm-thick nickel tape to over 400 °C in 100 ms by induction heating. In the future, this heating method could be scaled to laser-driven carbon-ion acceleration at rates beyond 10 Hz. The contaminant hydrogen is eliminated from the heated nickel surface, and a carbon source layer—derived from the contaminant carbon—is spontaneously formed by the catalytic effect of nickel. The species of ions accelerated from the nickel film heated to various temperatures have been observed experimentally. When the nickel film is heated beyond ∼150 °C, the proton signal considerably decreases, with a remarkable increase in the number and energy of carbon ions. The Langmuir adsorption model adequately explains the temperature dependence of desorption and re-adsorption of the adsorbed molecules on a heated target surface, and the temperature required for proton-free carbon-ion acceleration can be estimated.","PeriodicalId":54221,"journal":{"name":"Matter and Radiation at Extremes","volume":"18 1","pages":""},"PeriodicalIF":5.1,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87497109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 effects of incident light wavelength difference on the collective stimulated Brillouin scattering in plasmas 入射光波长差对等离子体集体受激布里渊散射的影响

IF 5.1 1区物理与天体物理

Matter and Radiation at Extremes Pub Date : 2023-07-28 DOI: 10.1063/5.0151372

Qian Wang, Zhi-chao Li, Zhanjun Liu, T. Gong, Wen-shuai Zhang, T. Xu, Bin Li, Ping Li, Xin Li, C. Zheng, L. Cao, Xincheng Liu, K. Pan, Hang Zhao, Yonggang Liu, B. Deng, Lifei Hou, Yingjie Li, Xiangming Liu, Yulong Li, X. Peng, Zanyang Guan, Qiangqiang Wang, X. Che, Sanwei Li, Qiang Yin, Wei Zhang, Liqiong Xia, Peng Wang, Xiaohua Jiang, Liang Guo, Qi Li, M. He, L. Hao, H. Cai, Wudi Zheng, S. Zou, Dong Yang, Feng Wang, Jiamin Yang, Bao-han Zhang, Yongkun Ding, Xiantu He

{"title":"The effects of incident light wavelength difference on the collective stimulated Brillouin scattering in plasmas","authors":"Qian Wang, Zhi-chao Li, Zhanjun Liu, T. Gong, Wen-shuai Zhang, T. Xu, Bin Li, Ping Li, Xin Li, C. Zheng, L. Cao, Xincheng Liu, K. Pan, Hang Zhao, Yonggang Liu, B. Deng, Lifei Hou, Yingjie Li, Xiangming Liu, Yulong Li, X. Peng, Zanyang Guan, Qiangqiang Wang, X. Che, Sanwei Li, Qiang Yin, Wei Zhang, Liqiong Xia, Peng Wang, Xiaohua Jiang, Liang Guo, Qi Li, M. He, L. Hao, H. Cai, Wudi Zheng, S. Zou, Dong Yang, Feng Wang, Jiamin Yang, Bao-han Zhang, Yongkun Ding, Xiantu He","doi":"10.1063/5.0151372","DOIUrl":"https://doi.org/10.1063/5.0151372","url":null,"abstract":"The first laser–plasma interaction experiment using lasers of eight beams grouped into one octad has been conducted on the Shenguang Octopus facility. Although each beam intensity is below its individual threshold for stimulated Brillouin backscattering (SBS), collective behaviors are excited to enhance the octad SBS. In particular, when two-color/cone lasers with wavelength separation 0.3 nm are used, the backward SBS reflectivities show novel behavior in which beams of longer wavelength achieve higher SBS gain. This property of SBS can be attributed to the rotation of the wave vectors of common ion acoustic waves due to the competition of detunings between geometrical angle and wavelength separation. This mechanism is confirmed using massively parallel supercomputer simulations with the three-dimensional laser–plasma interaction code LAP3D.","PeriodicalId":54221,"journal":{"name":"Matter and Radiation at Extremes","volume":"107 1","pages":""},"PeriodicalIF":5.1,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78090629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Methods of controlled formation of instabilities during the electrical explosion of thin foils 控制薄箔电爆炸时不稳定性形成的方法

IF 5.1 1区物理与天体物理

Matter and Radiation at Extremes Pub Date : 2023-07-18 DOI: 10.1063/5.0146820

T. Shelkovenko, I. N. Tilikin, A. Oginov, A. R. Mingaleev, V. Romanova, S. Pikuz

引用次数: 0

The role of charge-exchange processes in probing hydrogen plasma with a heavy ion beam 重离子束探测氢等离子体中电荷交换过程的作用

IF 5.1 1区物理与天体物理

Matter and Radiation at Extremes Pub Date : 2023-07-01 DOI: 10.1063/5.0157170

I. Tolstikhina, V. P. Shevelko

引用次数: 0

A systematic investigation of radiation collapse for disruption avoidance and prevention on JET tokamak JET托卡马克辐射坍缩避免和预防干扰的系统研究

IF 5.1 1区物理与天体物理

Matter and Radiation at Extremes Pub Date : 2023-06-13 DOI: 10.1063/5.0143193

R. Rossi, M. Gelfusa, T. Craciunescu, L. Spolladore, I. Wyss, E. Peluso, J. Vega, C. Maggi, J. Mailloux, M. Maslov, A. Murari

{"title":"A systematic investigation of radiation collapse for disruption avoidance and prevention on JET tokamak","authors":"R. Rossi, M. Gelfusa, T. Craciunescu, L. Spolladore, I. Wyss, E. Peluso, J. Vega, C. Maggi, J. Mailloux, M. Maslov, A. Murari","doi":"10.1063/5.0143193","DOIUrl":"https://doi.org/10.1063/5.0143193","url":null,"abstract":"To produce fusion reactions efficiently, thermonuclear plasmas have to reach extremely high temperatures, which is incompatible with their coming into contact with material surfaces. Confinement of plasmas using magnetic fields has progressed significantly in the last years, particularly in the tokamak configuration. Unfortunately, all tokamak devices, and particularly metallic ones, are plagued by catastrophic events called disruptions. Many disruptions are preceded by anomalies in the radiation patterns, particularly in ITER-relevant scenarios. These specific forms of radiation emission either directly cause or reveal the approaching collapse of the configuration. Detecting the localization of these radiation anomalies in real time requires an innovative and specific elaboration of bolometric measurements, confirmed by visible cameras and the inversion of sophisticated tomographic algorithms. The information derived from these measurements can be interpreted in terms of local power balances, which suggest a new quantity, the radiated power divided by the plasma internal energy, to determine the criticality of the plasma state. Combined with robust indicators of the temperature profile shape, the identified anomalous radiation patterns allow determination of the sequence of macroscopic events leading to disruptions. A systematic analysis of JET campaigns at high power in deuterium, full tritium, and DT, for a total of almost 2000 discharges, proves the effectiveness of the approach. The warning times are such that, depending on the radiation anomaly and the available actuators, the control system of future devices is expected to provide enough notice to enable deployment of effective prevention and avoidance strategies.","PeriodicalId":54221,"journal":{"name":"Matter and Radiation at Extremes","volume":"43 1","pages":""},"PeriodicalIF":5.1,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85418959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

A multi-material diagnosis method based on high-energy proton radiography 基于高能质子放射成像的多材料诊断方法

IF 5.1 1区物理与天体物理

Matter and Radiation at Extremes Pub Date : 2023-05-26 DOI: 10.1063/5.0138725

Feng Chen, Haibo Xu, Junhui Shi, Xinge Li, Na Zheng

引用次数: 0

Demonstration of multi-pass amplification of 46.9 nm laser pumped by capillary discharge 毛细管放电抽运46.9 nm激光器的多通放大论证

IF 5.1 1区物理与天体物理

Matter and Radiation at Extremes Pub Date : 2023-05-23 DOI: 10.1063/5.0150165

Dongdi Zhao, Yongpeng Zhao, Bo An, Jiaqi Li, H. Cui

引用次数: 0

Shock standards Cu, Ag, Ir, and Pt in a wide pressure range 冲击标准Cu, Ag, Ir, Pt，压力范围广

IF 5.1 1区物理与天体物理

Matter and Radiation at Extremes Pub Date : 2023-05-16 DOI: 10.1063/5.0124555

L. Burakovsky, D. Preston, S. Ramsey, C. Starrett, R. Baty

引用次数: 0

Observation of plasma dynamics in a theta pinch by a novel method 用一种新方法观察theta掐位中的等离子体动力学

IF 5.1 1区物理与天体物理

Matter and Radiation at Extremes Pub Date : 2023-05-16 DOI: 10.1063/5.0144921

Zhao Wang, Rui Cheng, Guodong Wang, Xuejian Jin, Yong Tang, Yanhong Chen, Zexian Zhou, Lulin Shi, Yuyu Wang, Y. Lei, Xiaoxia Wu, Junliang Yang

{"title":"Observation of plasma dynamics in a theta pinch by a novel method","authors":"Zhao Wang, Rui Cheng, Guodong Wang, Xuejian Jin, Yong Tang, Yanhong Chen, Zexian Zhou, Lulin Shi, Yuyu Wang, Y. Lei, Xiaoxia Wu, Junliang Yang","doi":"10.1063/5.0144921","DOIUrl":"https://doi.org/10.1063/5.0144921","url":null,"abstract":"A novel experimental method is proposed for observing plasma dynamics subjected to magnetic fields based on a newly developed cylindrical theta-pinch device. By measuring simultaneously the temporal profiles of multiple parameters including the drive current, luminosity, plasma density, and plasma temperature, it provides a basis for observing the plasma dynamics of the theta pinch, such as shock transport and magnetohydrodynamic instability. We show that the plasma evolution can be distinguished as three phases. First, in the radial implosion phase, the trajectories of the current sheath and shock wave are ascertained by combining experimental data with a snowplow model (Lee model) in a self-consistent way. Second, in the axial flow phase, we demonstrate that m = 0 (sausage) instability associated with the plasma axial flow suppresses the plasma end-loss. Third, in the newly observed anomalous heating phase, the lower-hybrid-drift instability may develop near the current sheath, which induces anomalous resistivity and enhanced plasma heating. The present experimental data and novel method offer better understanding of plasma dynamics in the presence of magnetic fields, thereby providing important support for relevant research in magneto-inertial fusion.","PeriodicalId":54221,"journal":{"name":"Matter and Radiation at Extremes","volume":"104 1","pages":""},"PeriodicalIF":5.1,"publicationDate":"2023-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80770315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

No evidence of superconductivity in a compressed sample prepared from lutetium foil and H2/N2 gas mixture 在由镥箔和H2/N2气体混合物制备的压缩样品中没有超导性的证据

IF 5.1 1区物理与天体物理

Matter and Radiation at Extremes Pub Date : 2023-05-16 DOI: 10.1063/5.0153447

Shu Cai, Jing Guo, Haiyun Shu, Liuxiang Yang, Pengyu Wang, Yazhou Zhou, Jinyu Zhao, Jinyu Han, Qi Wu, Wenge Yang, T. Xiang, H. Mao, Liling Sun

{"title":"No evidence of superconductivity in a compressed sample prepared from lutetium foil and H2/N2 gas mixture","authors":"Shu Cai, Jing Guo, Haiyun Shu, Liuxiang Yang, Pengyu Wang, Yazhou Zhou, Jinyu Zhao, Jinyu Han, Qi Wu, Wenge Yang, T. Xiang, H. Mao, Liling Sun","doi":"10.1063/5.0153447","DOIUrl":"https://doi.org/10.1063/5.0153447","url":null,"abstract":"A material described as lutetium–hydrogen–nitrogen (Lu-H-N in short) was recently claimed to have “near-ambient superconductivity” [Dasenbrock-Gammon et al., Nature 615, 244–250 (2023)]. If this result could be reproduced by other teams, it would be a major scientific breakthrough. Here, we report our results of transport and structure measurements on a material prepared using the same method as reported by Dasenbrock-Gammon et al. Our x-ray diffraction measurements indicate that the obtained sample contains three substances: the face-centered-cubic (FCC)-1 phase (Fm-3m) with lattice parameter a = 5.03 Å, the FCC-2 phase (Fm-3m) with a lattice parameter a = 4.755 Å, and Lu metal. The two FCC phases are identical to the those reported in the so-called near-ambient superconductor. However, we find from our resistance measurements in the temperature range from 300 K down to 4 K and the pressure range 0.9–3.4 GPa and our magnetic susceptibility measurements in the pressure range 0.8–3.3 GPa and the temperature range down to 100 K that the samples show no evidence of superconductivity. We also use a laser heating technique to heat a sample to 1800 °C and find no superconductivity in the produced dark blue material below 6.5 GPa. In addition, both samples remain dark blue in color in the pressure range investigated.","PeriodicalId":54221,"journal":{"name":"Matter and Radiation at Extremes","volume":"37 1","pages":""},"PeriodicalIF":5.1,"publicationDate":"2023-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87450296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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: 8