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Demonstration of laser pulse amplification by stimulated Brillouin scattering

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High Power Laser Science and Engineering 2014年第4期 46-51页

作者： E.Guillaume K.Humphrey H.Nakamura r.M.G.M.Trines r.heathcote M.Galimberti Y.Amano D.Doria G.Hicks E.Higson S.Kar G.Sarri M.Skramic J.Swain K.Tang J.Weston P.Zak E.P.Alves r.A.Fonseca F.Fi ′uza H.Habara K.A.Tanaka r.Bingham M.Borghesi Z.Najmudin L.O.Silva P.A.Norreys Laboratoire d'Optique Appliqu′ee Ecole PolytechniquePalaiseau 91128 France STFC rutherford Appleton Laboratory Didcot Oxon OX11 0QX United Kingdom University of Strathclyde Glasgow G11XQ United Kingdom Blackett Laboratory Imperial College London Prince Consort RoadLondon SW7 2BZ United Kingdom Graduate School of Engineering Osaka University Queens University Belfast Belfast BT7 1NN United Kingdom University of Oxford Parks RoadOxford OX1 3PU United Kingdom

The energy transfer by stimulated Brillouin backscatter from a long pump pulse(15 ps) to a short seed pulse(1 ps)has been investigated in a proof-of-principle demonstration experiment. The two pulses were both amplified in different beamlines of a Nd:glass laser system, had a central wavelength of 1054 nm and a spectral bandwidth of 2 nm, and crossed each other in an underdense plasma in a counter-propagating geometry, off-set by 10?. It is shown that the energy transfer and the wavelength of the generated Brillouin peak depend on the plasma density, the intensity of the laser pulses, and the competition between two-plasmon decay and stimulated raman scatter instabilities. The highest obtained energy transfer from pump to probe pulse is 2.5%, at a plasma density of 0.17 ncr, and this energy transfer increases significantly with plasma density. Therefore, our results suggest that much higher efficiencies can be obtained when higher densities(above0.25ncr) are used.

关键词： laser–plasma interactions optical pulse generation and compression stimulated Brillouin and raman scattering ultra-fast optical processes

Optimizing laser coupling,matter heating,and particle acceleration from solids using multiplexed ultraintense lasers

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Matter and radiation at Extremes 2024年第4期9卷 16-28页

作者： Weipeng Yao Motoaki Nakatsutsumi Sébastien Buffechoux Patrizio Antici Marco Borghesi Andrea Ciardi Sophia N.Chen Emmanuel d’Humières Laurent Gremillet robert heathcote Vojtech Horny Paul McKenna Mark N.Quinn Lorenzo romagnani ryan royle Gianluca Sarri Yasuhiko Sentoku Hans-Peter Schlenvoigt Toma Toncian Olivier Tresca Laura Vassura Oswald Willi Julien Fuchs LULI-CNrS CEASorbonne UniversitéEcole PolytechniqueInstitut Polytechnique de ParisF-91128 Palaiseau CedexFrance Sorbonne Université Observatoire de ParisUniversité PSLCNRSLERMAF-75005 ParisFrance INrS-EMT 1650 BoulLionel-BouletVarennesQuebec J3X 1S2Canada Center for Plasma Physics School of Mathematics and PhysicsQueen’s University BelfastBelfast BT71NNUnited Kingdom “Horia Hulubei”National Institute for Physics and Nuclear Engineering 30 Reactorului StreetRO-077125 Bucharest-MagureleRomania University of Bordeaux Centre Lasers Intenses et ApplicationsCNRSCEAUMR 5107F-33405 TalenceFrance CEA DAMDIFF-91297 ArpajonFrance Université Paris-Saclay CEALMCE91680 Bruyères-le-ChatelFrance Central Laser Facility STFC Rutherford Appleton LaboratoryDidcotUnited Kingdom SUPA Department of PhysicsUniversity of StrathclydeGlasgow G40NGUnited Kingdom Department of Physics University of NevadaRenoNevada 89557USA Institute of Laser Engineering Osaka University2-6 YamadaokaSuitaOsaka 565-0871Japan Institut fur Laser und Plasmaphysik Heinrich Heine Universitat DusseldorfDusseldorfGermany

realizing the full potential of ultrahigh-intensity lasers for particle and radiation generation will require multi-beam arrangements due to technology ***,we investigate how to optimize their coupling with solid ***,we show that overlapping two intense lasers in a mirror-like configuration onto a solid with a large preplasma can greatly improve the generation of hot electrons at the target front and ion acceleration at the target *** underlying mechanisms are analyzed through multidimensional particle-in-cell simulations,revealing that the self-induced magnetic fields driven by the two laser beams at the target front are susceptible to reconnection,which is one possible mechanism to boost electron *** addition,the resistive magnetic field generated during the transport of the hot electrons in the target bulk tends to improve their *** simulations also indicate that such effects can be further enhanced by overlapping more than two laser beams.

关键词： laser acceleration particle

DrOUGHT MANAGEMENT IN SOUTH AUSTrALIA

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干旱区资源与环境 1993年第Z1期7卷 108-114页

作者： r.L.heathcote Flinders University AdelaideSouth Australia

1. Introduction The revived concern for environmental hazards implicit in the contemporary debatesupon Global Change questions, the Ozone Hole and the International Decade of NaturalDisaster reduction, raises once more the question of disaster relief. Much of the ensuingconcerm for disaster relief however has focused upon technical questions of supplying aid

关键词： South Astrilia Drought Management

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南澳大利亚的旱灾管理

干旱区资源与环境 1993年第Z1期7卷 104-107页

作者： r.L.heathcote 福林德斯大学

1.引言在现代全球变化,臭氧洞和国际自然灾害减灾问题的十年讨论中,出于对环境灾害的担心,人们再次提出了减灾问题。可是,许多对减灾的关注集中在困难条件下提供援助的技术问题,或许最新载在联合国救灾处通讯的文章就是以极端的形式描... 详细信息

1.引言在现代全球变化,臭氧洞和国际自然灾害减灾问题的十年讨论中,出于对环境灾害的担心,人们再次提出了减灾问题。可是,许多对减灾的关注集中在困难条件下提供援助的技术问题,或许最新载在联合国救灾处通讯的文章就是以极端的形式描述不用降落伞从美国大力士C—130军用飞机上投掷粮食而不致在落地时袋子破碎的技巧。

关键词：南澳大利亚旱灾管理

中英百年贸易包装设计的文化交融性研究(1840—1949)

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包装工程 2021年第20期42卷 346-351页

作者：甘泉高瞩 David heathcote 上海工程技术大学上海201620 利物浦约翰摩尔大学利物浦L32AJ

目的1840—1949年是中英两国商品贸易交流最频繁的百余年,包装作为西方物质文明的载体,伴随着西学东渐之风大量、集中地传入中国,以至于中国现代包装设计上带有鲜明的西方烙印。以跨文化视角研究包装设计的历史进程,将中英百年的设计现... 详细信息

目的1840—1949年是中英两国商品贸易交流最频繁的百余年,包装作为西方物质文明的载体,伴随着西学东渐之风大量、集中地传入中国,以至于中国现代包装设计上带有鲜明的西方烙印。以跨文化视角研究包装设计的历史进程,将中英百年的设计现象放置于全球视域中,探究中英两国百年包装设计文化互摄的面貌以及互动中的复杂关系,梳理中国包装设计现代化进程中对异质文化的接纳与融合。方法采用图像学研究法分析中英包装设计的风格;使用谱系研究法梳理比对材料及包装印刷的技术手段;深入解析中英贸易往来的时代背景、贸易制度和社会环境。结论中国包装设计的形态、风格和审美意识在中英贸易文化交流中深受西方艺术设计思潮的影响;包装设计背后的文化流动是交汇的,一方面是英国对东方韵味的好奇与想象,一方面是中国对西方器物的追从与崇尚;现代中国包装设计风格的形成是在中西方文化接触、借鉴和创造中不断强化自我认同形成的,是地域属性背景下的吐故纳新。

关键词：包装设计文化交融中英对比百年贸易

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红色电话亭:完全的英国范儿

新东方英语（中英文版） 2017年第1期 60-62页

作者： Edwin heathcote 白伊阳

去英国旅游,每一个人都免不了要与伫立在街头的红色电话亭来一张合影,毕竟它是英国最具特色的文化标记之一。在手机普及的今天,红色电话亭已基本失去当初的功用,但它优雅而精巧的设计仍然受人喜爱。而从文化的角度来说,它更像是英国那... 详细信息

去英国旅游,每一个人都免不了要与伫立在街头的红色电话亭来一张合影,毕竟它是英国最具特色的文化标记之一。在手机普及的今天,红色电话亭已基本失去当初的功用,但它优雅而精巧的设计仍然受人喜爱。而从文化的角度来说,它更像是英国那个已经逝去的时代的象征,同时又是英国自我意识的隐喻。让我们一起跟随本文来了解它的历史由来与文化内涵。

关键词：自我意识 infrastructure competition Gilbert everything manufactured money designer familiar remember

干扰素和核苷／核苷酸类似物哪种更适合作为乙型肝炎治疗的一线药物？——干扰素可作为治疗慢乙肝的一线药物

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传染病网络动态 2006年第1期 37-40页

作者： E．Jenny heathcote，MD 李冰（编译）杨露绮（审校）

本文讨论的是治疗HBV感染的最佳一线用药问题。Jenny heathcote博士的观点是干扰素作为一线治疗药物对乙肝病人更有益，而Marion Peter博士则认为乙肝病人选择核苷／核苷酸类似物作为一线治疗药物是最佳方案。现将两位学者的看法介绍如下。

关键词：核苷酸类似物肝炎治疗干扰素一线药物慢乙肝乙型合作治疗药物 HBV感染 Peter

阿德福韦长期治疗HBeAg阴性的慢性乙型肝炎

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世界核心医学期刊文摘（胃肠病学分册） 2005年第11期1卷 2-3页

作者： Hadziyannis S.J. Tassopoulos N.C. Jenny heathcote E. 李明 Department of Medicine Henry Dunant Hospital 107 Mesogion Ave. Athens 11526 Greece Dr.

BACKGrOUND: Treatment with adefovir dipivoxil for 48 weeks resulted in histologic, virologic, and biochemical improvement in patients with hepatitis B e antigen (HBeAg)- negative chronic hepatitis B. We evaluated the effect of continued therapy as compared with cessation of therapy. METHODS: One hundred eighty-five HBeAgnegative patients with chronic hepatitis B were assigned to receive 10 mg of adefovir dipivoxil or placebo once daily for 48 weeks (ratio, 2 ∶ 1). After week 48, patients receiving adefovir dipivoxil were again randomly assigned either to receive an additional 48 weeks of the drug or to switch to placebo. Patients originally assigned to placebo were switched to adefovir dipivoxil. Patients treated with adefovir dipivoxil during weeks 49 through 96 were subsequently offered continued therapy. The primary end points were changes in hepatitis B virus (HBV) DNA and alanine aminotransferase levels. rESULTS: Treatment with adefovir dipivoxil resulted in a median decrease in serum HBV DNA of 3.47 log copies per milliliter (on a base-10 scale) at 96 weeks and 3.63 log copies per milliliter at 144 weeks. HBV DNA levels were less than 1000 copies per milliliter in 71 percent of patients at week 96 and 79 percent at week 144. In the majority of patients who were switched from adefovir dipivoxil to placebo, the benefit of treatment was lost (median change in HBV DNA levels from baseline, - 1.09 log copies per milliliter; only 8 percent of patients had levels below 1000 copies per milliliter at week 96). Side effects during weeks 49 through 144 were similar to those during the initial 48 weeks. resistance mutations rtN236T and rtA181V were identified in 5.9 percent of patients after 144 weeks. CONCLUSIONS: In patients with HBeAg-negative chronic hepatitis B, the benefits achieved from 48 weeks of adefovir dipivoxil were lost when treatment was discontinued. In patients treated for 144 weeks, benefits were maintained, with infrequent emergence of viral resistance.

关键词：乙型肝炎 HBeAg阴性韦长慢性乙肝阿德基线水平终点指标安慰剂周和耐药基因

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急性病毒性肝炎的诊疗

胃肠病学和肝病学杂志 2004年第2期13卷 116-123页

作者：王豪 J.heathcote A.Elewaut S.Fedail A.Gangl S.Hamid M.Shah D.Lavanchy H.Liu J.Krabshuis 北京大学人民医院肝病研究所

一、定义急性病毒性肝炎(AVH)是一种全身感染但主要侵犯肝脏的疾病.AVH主要由嗜肝病毒引起(甲、乙、丙、丁、戊型肝炎).其他病毒感染偶然情况下可累及肝脏(巨细胞病毒CMV,疱疹病毒,柯萨奇病毒,腺病毒).甲型肝炎和戊型肝炎是自限性疾病... 详细信息

一、定义急性病毒性肝炎(AVH)是一种全身感染但主要侵犯肝脏的疾病.AVH主要由嗜肝病毒引起(甲、乙、丙、丁、戊型肝炎).其他病毒感染偶然情况下可累及肝脏(巨细胞病毒CMV,疱疹病毒,柯萨奇病毒,腺病毒).甲型肝炎和戊型肝炎是自限性疾病,但丙型肝炎及次之的乙型肝炎则主要转变成慢性感染.

关键词：急性病毒性肝炎诊断治疗自限性疾病