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Effects of target pre-heating and expansion on terahertz radiation production from intense laser-solid interactions

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High Power Laser Science and Engineering 2014年第1期2卷 13-17页

作者： X.H.Yuan Y.Fang D.C.Carroll D.A.MacLellan F.Du n.booth M.Burza M.Chen R.J.Gray Y.F.Jin Y.T.Li Y.Liu D.neely H.Powell G.Scott C.-G.Wahlstrm J.Zhang P.McKenna Z.M.Sheng Key Laboratory for Laser Plasmas (Ministry of Education) and Department of Physics and Astronomy Shanghai Jiao Tong University Beijing national Laboratory of Condensed Matter Physics Institute of Physics Chinese Academy of Sciences SUPA Department of Physics University of Strathclyde Central Laser Facility Rutherford Appleton Laboratory Department of Physics Lund University

The first experimental measurements of intense(～7 × 1019 W cm-2) laser-driven terahertz(THz) radiation from a solid target which is preheated by an intense pulse of laser-accelerated protons is reported. The total energy of the THz radiation is found to decrease by approximately a factor of 2 compared to a cold target reference. This is attributed to an increase in the scale length of the preformed plasma, driven by proton heating, at the front surface of the target,where the THz radiation is generated. The results show the importance of controlling the preplasma scale length for THz production.

关键词： target heating terahertz radiation

Optimization of a laser plasma-based x-ray source according to WDM absorption spectroscopy requirements

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Matter and Radiation at Extremes 2021年第1期6卷 37-44页

作者： A.S.Martynenko S.A.Pikuz I.Yu.Skobelev S.n.Ryazantsev C.D.Baird n.booth L.n.K.Dohl P.Durey A.Ya.Faenov D.Farley R.Kodama K.Lancaster P.McKenna C.D.Murphy C.Spindloe T.A.Pikuz n.Woolsey Joint Institute for High Temperatures of the Russian Academy of Sciences 125412 MoscowRussia national Research nuclear University MEPhI Kashirskoe Sh.31115409 MoscowRussia York Plasma Institute Department of PhysicsUniversity of YorkYork YO105DDUnited Kingdom Central Laser Facility STFC Rutherford Appleton LaboratoryDidcot OX110QXUnited Kingdom Open and Transdisciplinary Research Initiative Osaka UniversityOsaka 565-0871Japan Institute of Laser Engineering Osaka UniversitySuita 565-0871Japan Department of Physics SUPAUniversity of StrathclydeGlasgow G40NGUnited Kingdom

X-ray absorption spectroscopy is a well-accepted diagnostic for experimental studies of warm dense *** requires a short-lived X-ray source of sufficiently high emissivity and without characteristic lines in the spectral range of *** the present work,we discuss how to choose an optimum material and thickness to get a bright source in the wavelength range 2A–6A(∼2 keV to 6 keV)by considering relatively low-Z *** demonstrate that the highest emissivity of solid aluminum and silicon foil targets irradiated with a 1-ps high-contrast sub-kJ laser pulse is achieved when the target thickness is close to 10μ*** outer plastic layer can increase the emissivity even further.

关键词： laser WDM source

Proton deflectometry of a capacitor coil target along two axes

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High Power Laser Science and Engineering 2020年第2期8卷 10-18页

作者： P.Bradford M.P.Read M.Ehret L.Antonelli M.Khan n.booth K.Glize D.Carroll R.J.Clarke R.Heathcote S.Ryazantsev S.Pikuz C.Spindloe J.D.Moody B.B.Pollock V.T.Tikhonchuk C.P.Ridgers J.J.Santos n.C.Woolsey York Plasma Institute Department of PhysicsUniversity of YorkHeslingtonYork YO105DDUK Centre Lasers Intenses et Applications University of Bordeaux-CNRS-CEA33405 TalenceFrance Institut fur Kernphysik Tech.Univ.Darmstadt64289 DarmstadtGermany Central Laser Facility Rutherford Appleton LaboratoryChiltonDidcotSTFCUKRIOxfordshireUK Joint Institute for High Temperatures RASMoscow 125412Russia national Research nuclear University MEPhI Moscow 115409Russia Lawrence Livermore national Laboratory LivermoreCalifornia 94551USA ELI Beamlines Institute of PhysicsCzech Academy of SciencesZa Radnicic 83525241 DolníBrezanyCzech Republic

A developing application of laser-driven currents is the generation of magnetic fields of picosecond-nanosecond duration with magnitudes exceeding B=10 ***-loop and helical coil targets can direct laser-driven discharge currents along wires to generate spatially uniform,quasi-static magnetic fields on the millimetre ***,we present proton deflectometry across two axes of a single-loop coil ranging from 1 to 2 mm in *** with proton tracking simulations shows that measured magnetic fields are the result of kiloampere currents in the coil and electric charges distributed around the coil *** this dual-axis platform for proton deflectometry,robust measurements can be made of the evolution of magnetic fields in a capacitor coil target.

关键词： strong magnetic field laser-driven coil targets laser-plasma interaction proton deflectometry laboratory astrophysics

Observation and modelling of stimulated Raman scattering driven by an optically smoothed laser beam in experimental conditions relevant for shock ignition

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High Power Laser Science and Engineering 2021年第4期9卷 160-178页

作者： G.Cristoforetti S.Hüller P.Koester L.Antonelli S.Atzeni F.Baffigi D.Batani C.Baird n.booth M.Galimberti K.Glize A.Héron M.Khan P.Loiseau D.Mancelli M.notley P.Oliveira O.Renner M.Smid A.Schiavi G.Tran n.C.Woolsey L.A.Gizzi Intense Laser Irradiation Laboratory INO-CNRINO-CNR56124 PisaItaly Centre de Physique Théorique CPHT CNRSIP ParisEcole Polytechnique91128 PalaiseauFrance York Plasma Institute Department of PhysicsUniversity of YorkYork YO105DDUK Dipartimento SBAI Universitàdi Roma'La Sapienza'00161 RomaItaly Universitéde Bordeaux CNRSCEACELIA33405 TalenceFrance STFC Rutherford Appleton Lab Central Laser FacilityDidcot SN21SZUK Key Laboratory for Laser Plasmas(MOE) Shanghai Jiao Tong UniversityShanghai 200240China CEA DAMDIF91297 ArpajonFrance UniversitéParis-Saclay CEALMCE91680 Bruyeres-le-ChatelFrance Institute of Physics ELI BeamlinesInstitute of Plasma PhysicsCzech Academy of Sciences18221 PragueCzech Republic Helmholtz-Zentrum Dresden-Rossendorf 01328 DresdenGermany

We report results and modelling of an experiment performed at the Target Area West Vulcan laser facility,aimed at investigating laser±plasma interaction in conditions that are of interest for the shock ignition scheme in inertial confinement fusion(ICF),that is,laser intensity higher than 10^(16) W/cm^(2) impinging on a hot(T>1 keV),inhomogeneous and long scalelength pre-formed *** show a significant stimulated Raman scattering(SRS)backscattering(;%-20%of laser energy)driven at low plasma densities and no signatures of two-plasmon decay(TPD)/SRS driven at the quarter critical density *** are satisfactorily reproduced by an analytical model accounting for the convective SRS growth in independent laser speckles,in conditions where the reflectivity is dominated by the contribution from the most intense speckles,where SRS becomes *** and kinetic simulations well reproduce the onset of SRS at low plasma densities in a regime strongly affected by non-linear Landau damping and by filamentation of the most intense laser *** absence of TPD/SRS at higher densities is explained by pump depletion and plasma smoothing driven by *** prevalence of laser coupling in the low-density profile justifies the low temperature measured for hot electrons(7-12 keV),which is well reproduced by numerical simulations.

关键词： plasma simulations shock ignition stimulated Raman scattering inertial confinement fusion laser-plasma interaction

Zwitterion-doped liquid crystal speckle reducers for immersive displays and vectorial imaging

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Light(Science & Applications) 2023年第11期12卷 2363-2377页

作者： Yihan Jin nathan P.Spiller Chao He Grahame Faulkner Martin J.booth Steve J.Elston Stephen M.Morris Department of Engineering Science University of OxfordParks RoadOxford OX13PJUK

Lasers possess many attractive features(e.g.,high brightness,narrow linewidth,well-defined polarization)that make them the ideal illumination source for many different scientific and technological endeavors relating to imaging and the display of high-resolution ***,their high-level of coherence can result in the formation of noise,referred to as speckle,that can corrupt and degrade ***,we demonstrate a new electro-optic technology for combatting laser speckle using a chiral nematic liquid crystal(LC)dispersed with zwitterionic *** are presented that demonstrate when driven at the optimum electric field conditions,the speckle noise can be reduced by>90%resulting in speckle contrast(C)values of C=0.07,which is approaching that required to be imperceptible to the human *** LC technology is then showcased in an array of different display and imaging applications,including a demonstration of speckle reduction in modern vectorial laser-based imaging.

关键词： polarization speckle crystal

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护理行业如何应对数字化未来

英国医学杂志中文版 2021年第12期24卷 691-694页

作者： Richard G booth Gillian Strudwick Susan McBride Siobhán O'Connor Ana Laura Solano López 李高华(译) Arthur Labatt Family School of nursing Western UniversityLondonCanada Centre for Addiction and Mental Health TorontoCanada School of nursing Texas Tech University Health Sciences CenterLubbockUSA School of Health in Social Science University of EdinburghEdinburghUK University of Costa Rica San JoséCosta Rica 剑桥朗思口语考官

数字技术对全球护理行业的影响不断增加:人工智能(AI)和机器人系统的影响力与日俱增;社会对手机、网络、社交媒体高度依赖,尤其是新型冠状病毒肺炎疫情暴发后,社会越来越依赖于远程医疗及其他通过虚拟手段进行的医疗服务。

关键词：护理行业疫情暴发机器人系统远程医疗社交媒体医疗服务新型冠状病毒数字化

Low cross-talk optical addressing of trapped-ion qubits using a novel integrated photonic chip

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Light(Science & Applications) 2024年第10期13卷 2179-2191页

作者： Ana S.Sotirova Bangshan Sun Jamie D.Leppard Andong Wang Mohan Wang Andres Vazquez-Brennan David P.nadlinger Simon Moser Alexander Jesacher Chao He Fabian Pokorny Martin J.booth Christopher J.Ballance University of Oxford Department of PhysicsOxford Ox13PUUK University of Oxford Department of Engineering ScienceOxford Ox13PJUk institute of Biomedical Physics Medical University of InnsbruckMullerstraBe 446020 InnsbruckAustria

Individual optical addressing in chains of trapped atomic ions requires the generation of many small,closely spaced beams with low ***,implementing parallel operations necessitates phase,frequency,and amplitude control of each individual ***,we present a scalable method for achieving all of these capabilities using a high-performance integrated photonic chip coupled to a network of optical fibre *** chip design results in very low cross-talk between neighbouring channels even at the micrometre-scale spacing by implementing a very high refractive index contrast between the channel core and ***,the photonic chip manufacturing procedure is highly flexible,allowing for the creation of devices with an arbitrary number of channels as well as non-uniform channel spacing at the chip *** present the system used to integrate the chip within our ion trap apparatus and characterise the performance of the full individual addressing setup using a single trapped ion as a light-field *** measurements showed intensity cross-talk below~10^(-3) across the chip,with minimum observed cross-talk as low as~10^(-5).

关键词： spacing cross optical

Lack of Association between Impulse Control Disorders and REM Sleep Behavior Disorder in Patients with Parkinson’s Disease

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Advances in Parkinson's Disease 2016年第4期5卷 67-72页

作者： Lisette Bazán-Rodríguez Mayela Rodríguez-Violante Amin Cervantes-Arriaga Guillermo Parra-López Diego Cruz-Fino Francisco Pascasio-Astudillo Vanessa Alatriste-booth Clinical Laboratory of neurodegenerative Diseases National Institute of Neurology and Neurosurgery Mexico City Mexico Movement Disorders Clinic National Institute of Neurology and Neurosurgery Mexico City Mexico Sleep Disorders Unit National Institute of Neurology and Neurosurgery Mexico City Mexico

Purpose: Rapid eye movement sleep behavior disorder (RBD) and impulse control disorders (ICDs) are common in subjects with Parkinson’s disease. The association between these two conditions has been contradictory. The aim of this study is to analyze the association between these two non-motor symptoms. Methods: Consecutive subjects with Parkinson’s disease attending the Movement Disorders Outpatient Clinic were included. The presence of ICDs was assessed using the Questionnaire for Impulse Control Disorders Rating Scale. RBD was diagnosed by an overnight, single night polysomnography. Results: Fifty-five consecutive subjects with Parkinson’s disease were included. The prevalence of ICDs and related behaviors was 23.6% (ICD in 14.5% and related behaviors in 9.1%). RBD was diagnosed in 47.2% of the patients. no differences were found in the frequency of ICDs and related behaviors when comparing subjects with and without RBD (23% versus 24.1%, p = 0.926, respectively). Conclusion: no association between the presence of RBD and the frequency of ICDs in subjects with Parkinson’s disease was found.

关键词： Parkinson’s Disease Impulse Control Disorders REM Sleep Behavior Disorder

Diagnostic challenges in Salla disease

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Open Journal of Genetics 2013年第2期3卷 46-49页

作者： Jessica n. Hartley Michael S. Salman Frances A. booth Lorne Seargeant David A. Wenger Jens Wrogemann Aizeddin A. Mhanni Department of Biochemistry and Medical Genetics University of Manitoba Winnipeg Canada Program of Genetics and Metabolism Winnipeg Canada Department of Biochemistry and Medical Genetics University of Manitoba Winnipeg Canada Program of Genetics and Metabolism Winnipeg Canada Department of Pediatrics and Child Health University of Manitoba Winnipeg Canada Department of Pediatrics and Child Health University of Manitoba Winnipeg Canada Diagnostic Services Manitoba University of Manitoba Winnipeg Canada Department of Pediatrics and Child Health University of Manitoba Winnipeg Canada Section of Pediatric Neurology University of Manitoba Winnipeg Canada Department of Radiology Section of Pediatric Radiology University of Manitoba Winnipeg Canada Lysosomal Diseases Testing Laboratory Thomas Jefferson University Philadelphia USA

Sialic acid storage disease (Salla disease) is an autosomal recessive disorder caused by mutations in a lysosomal sialic acid export protein, SLC17A5 (OMIM #604369). This disorder was initially described in northern Finland but more recently has been reported in patients of other ethnicities. We describe the clinical presentation and the neuroimaging findings of two non-Finnish children where a diagnosis of Salla disease was suspected on the basis of brain magnetic resonance imaging. The biochemical confirmation of this diagnosis posed a challenge as both patients had elevated percent free urine sialic acid but biochemical analyses in fibroblasts were not conclusive;therefore, molecular testing was necessary for confirmation of the diagnosis. The described encounters demonstrate the importance of pursuing confirmatory molecular diagnostic testing when a sialic acid storage disorder is suspected.

关键词： Sialic Acid Salla Disease Lysosomal SLC17A5