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EMP control and characterization on high-power laser systems

High Power Laser Science and Engineering 2018年第2期6卷 55-62页

作者： P.Bradford N.C.Woolsey G.G.Scott G.Liao H.Liu Y.Zhang B.Zhu C.Armstrong S.Astbury C.Brenner P.Brummitt F.Consoli I.East R.Gray D.Haddock E Huggard E J.R.Jones E.Montgomery I.Musgrave E Oliveira D.R.Rusby C.Spindloe B.Summers E.Zemaityte Z.Zhang Y.Li P.McKenna D.Neely Department of Physics York Plasma InstituteUniversity of YorkHeslingtonYork YO10 5DDUK Central Laser Facility STFC Rutherford Appleton LaboratoryDidcot OX110QXUK Key Laboratory for Laser Plasmas(Ministry of Education)and School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Department of Physics SUPA University of StrathclydeGlasgow G40NGUK ENEA-C.R.Frascati-Dipartimento FSN Via E.Fermi 4500044 FrascatiItaly Space Science Department STFC Rutherford Appleton LaboratoryDidcot OX110QXUK

Giant electromagnetic pulses(EMP) generated during the interaction of high-power lasers with solid targets can seriously degrade electrical measurements and equipment. EMP emission is caused by the acceleration of hot electrons inside the target, which produce radiation across a wide band from DC to terahertz frequencies. Improved understanding and control of EMP is vital as we enter a new era of high repetition rate, high intensity lasers(e.g. the Extreme Light Infrastructure).We present recent data from the VULCAN laser facility that demonstrates how EMP can be readily and effectively reduced. Characterization of the EMP was achieved using B-dot and D-dot probes that took measurements for a range of different target and laser parameters. We demonstrate that target stalk geometry, material composition, geodesic path length and foil surface area can all play a significant role in the reduction of EMP. A combination of electromagnetic wave and 3 D particle-in-cell simulations is used to inform our conclusions about the effects of stalk geometry on EMP,providing an opportunity for comparison with existing charge separation models.

关键词： high energy density physics high-power laser related laser components laser plasmas interaction target design and fabrication

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维普期刊数据库

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Efficient offline production of freestanding thin plastic foils for laser-driven ion sources

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High Power Laser Science and Engineering 2017年第2期5卷 8-12页

作者： Sebastian Seuferling Matthias Alexander Otto Haug Peter Hilz Daniel Haffa Christian Kreuzer Jorg Schreiber Fakultat fur Physik Ludwig-Maximilians-Universitat Munchen D-85748 Garching Germany

Modern chirped pulse amplification laser systems with continuously improving controllability and increasing power are about to reach intensities of up to 10^(22) W cm^(-2) and have proven their potential to accelerate ions out of plasma to several tens percent of the speed of light. For enabling application, one important step is to increase the repetition rate at which ion bunches are at the disposal. In particular, techniques used so far for thin foil target production can require several days of preparing reasonable amounts for a single campaign. In this paper we describe the reasonably droplet method which we have tested and improved so that the emerging foils with thicknesses of a few nanometres up to micrometre can be used as targets for laser ion acceleration. Their quality and performance can compete with so far employed techniques thereby enabling the production of hundreds of targets per day.

关键词： target design and fabrication ultra-short pulse laser interaction with matter

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维普期刊数据库

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Review of HPLSE special issue on target fabrication

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High Power Laser Science and Engineering 2018年第2期6卷 1-8页

作者： Christopher Spindloe Yuji Fukuda Paul Fitzsimmons Kai Du Colin Danson Science and Technology Facilities Council Rutherford Appleton LaboratoryUK Scitech Precision Ltd Rutherford Appleton LaboratoryUK Kansai Photon Science Institute QSTKyotoJapan General Atomics San DiegoUSA Research Center of Laser Fusion CAEPMianyangChina AWE plc AldermastonUK CIFS Blackett LaboratoryImperial College LondonUK

In 2017 the journal High Power Laser Science and Engineering produced a Special Issue on target *** scope of the special issue was to span the latest developments and reviews on topics related to their deployment on u... 详细信息

关键词： high-power laser high-power laser-related laser components target design and fabrication

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targets for high repetition rate laser facilities:needs,challenges and perspectives

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High Power Laser Science and Engineering 2017年第3期5卷 10-40页

作者： I.Prencipe J.Fuchs S.Pascarelli D.W.Schumacher R.B.Stephens N.B.Alexander R.Briggs M.Büscher M.O.Cernaianu A.Choukourov M.De Marco A.Erbe J.Fassbender G.Fiquet P.Fitzsimmons C.Gheorghiu J.Hund L.G.Huang M.Harmand N.J.Hartley A.Irman T.Kluge Z.Konopkova S.Kraft D.Kraus V.Leca D.Margarone J.Metzkes K.Nagai W.Nazarov P.Lutoslawski D.Papp M.Passoni A.Pelka J.P.Perin J.Schulz M.Smid C.Spindloe S.Steinke R.Torchio C.Vass T.Wiste R.Zaffino K.Zeil T.Tschentscher U.Schramm T.E.Cowan Lawrence Berkeley National Laboratory USA 25Institute of Microelectronics of Barcelona National Center of Microelectronic Spanish Research Council Spain 26University of St. Andrews UK

A number of laser facilities coming online all over the world promise the capability of high-power laser experiments with shot repetition rates between 1 and 10 Hz. target availability and technical issues related to the interaction environment could become a bottleneck for the exploitation of such facilities. In this paper, we report on target needs for three different classes of experiments: dynamic compression physics, electron transport and isochoric heating, and laser-driven particle and radiation sources. We also review some of the most challenging issues in target fabrication and high repetition rate operation. Finally, we discuss current target supply strategies and future perspectives to establish a sustainable target provision infrastructure for advanced laser facilities.

关键词： high-energy density physics target design and fabrication

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Surface characterization of ICF capsule by AFM-based profilometer

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High Power Laser Science and Engineering 2017年第3期5卷 55-61页

作者： Jie Meng Xuesen Zhao Xing Tang Yihao Xia Xiaojun Ma Dangzhong Gao Harhin Institute of Technolog3 Harbin 150001 PR China

Outside surface fluctuations of inertial confinement fusion （ICF） capsule greatly affect the implosion performance. An atomic lbrce microscope （AFM）-based profilometer is developed to precisely characterize the capsule surface with nanometer resolution. With the standard nine surface profiles and the complete coverage data, I D and 2D power spectra are obtained to quantitatively qualify the capsule. Capsule center fast aligning, orbit traces automatic recording, 3D capsule orientation have been studied to improve the accuracy and efficiency of the profilometer.

关键词： inertial confinement fusion target design and fabrication

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