Strong magnetic fields generated with a simple open-ended coil irradiated by high power laser pulses

Zhu, Bingli; Li, Y. T.; Yuan, Ding; Li, Y. F.; Li, F.; Liao, G. Q.; Zhao, Jiarui; Zhong, Jiayong; Xue, Feibiao; He, Simin; Wang, W. W.; Liu, Feng; Zhang, F. Q.; Yang, Lei; Zhou, Kainan; Xie, Na; Wang, Hong; Wei, Huigang; Zhang, K.; Han, Bo; Pei, Xiaoxing; Liu, Chunlei; Zhang, Zhihai; Wang, W. M.; Zhu, Jianqiang; Gu, Yuqiu; Zhao, Ziqi; Zhang, B. H.; Zhao, Gang; Zhang, J.

doi:10.1063/1.4939119

Cited by 42 publications

(26 citation statements)

References 32 publications

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“…Using nondestructive magnets, fields on ∼ 1 MG a) Electronic mail: shi9@llnl.gov level are routinely generated at user facilities worldwide [10][11][12][13] . Moreover, with destructive magnets, much higher fields have been obtained using laser-driven targets [14][15][16][17][18] and magnetic flux compression [19][20][21] .…”

Section: Introductionmentioning

confidence: 99%

Amplification of mid-infrared lasers via backscattering in magnetized plasmas

Shi

Fisch

2019

Physics of Plasmas

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Plasmas may be used as gain media for amplifying intense lasers, and external magnetic fields may be applied to improve the performance. For mid-infrared lasers, the requisite magnetic field is on megagauss scale, which can already be provided by current technologies. Designing the laser amplifier requires knowing the magnetized threewave coupling coefficient, which is mapped out systematically in this paper. By numerically evaluating its formula, we demonstrate how the coupling depends on angle of wave propagation, laser polarization, magnetic field strength, plasma temperature, and plasma density in the backscattering geometry. Since the mediation is now provided by magnetized plasma waves, the coupling can differ significantly from unmagnetized Raman and Brillouin scatterings.

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Section: Introductionmentioning

confidence: 99%

Amplification of mid-infrared lasers via backscattering in magnetized plasmas

Shi

Fisch

2019

Physics of Plasmas

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“…Another technique is to use a laser-driven capacitor–coil target 22 to generate a strong magnetic field. The strength of the magnetic field was measured on GEKKO-XII 23 , 24 , LULI2000 25 , Shengguang-II 26 , and OMEGA-EP laser facilities 27 , 28 . As discussed in the Supplementary Discussion and summarized in Supplementary Table 1 , experimental results revealed that a 600–700-T magnetic field was generated by using a tightly focused kilo-joule and nano-second infrared ( λ L = 1.053 μm) laser beam.…”

Section: Introductionmentioning

confidence: 99%

Magnetized fast isochoric laser heating for efficient creation of ultra-high-energy-density states

et al. 2018

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Fast isochoric heating of a pre-compressed plasma core with a high-intensity short-pulse laser is an attractive and alternative approach to create ultra-high-energy-density states like those found in inertial confinement fusion (ICF) ignition sparks. Laser-produced relativistic electron beam (REB) deposits a part of kinetic energy in the core, and then the heated region becomes the hot spark to trigger the ignition. However, due to the inherent large angular spread of the produced REB, only a small portion of the REB collides with the core. Here, we demonstrate a factor-of-two enhancement of laser-to-core energy coupling with the magnetized fast isochoric heating. The method employs a magnetic field of hundreds of Tesla that is applied to the transport region from the REB generation zone to the core which results in guiding the REB along the magnetic field lines to the core. This scheme may provide more efficient energy coupling compared to the conventional ICF scheme.

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“…Strong magnetic field of hundreds of Teslas or several MG was demonstrated on the experimental platform of ShenGuang(SG)-II laser facility by irradiating 2 kJ in 1 ns on a planar plate attached on the end of one open-ended coil [23]. The magnetic field is generated by cold background electrons to neutralize the positively charged laser foci, which has a different physical mechanism from the previous study of magnetic fields driven by hot electron current in a capacitorcoil target [24].…”

Section: Controllable Way For Generating Magnetic Field Larger Than 1mentioning

confidence: 99%

Studies of high energy density physics and laboratory astrophysics driven by intense lasers

Zhang

Chen

et al. 2016

J. Phys.: Conf. Ser.

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Abstract. Laser plasmas are capable of creating unique physical conditions with extreme high energy density, which are not only closely relevant to inertial fusion energy studies, but also to laboratory simulation of some astrophysical processes. In this paper, we highlight some recent progress made by our research teams. The first part is about directional hot electron beam generation and transport for fast ignition of inertial confinement fusion, as well as a new scheme of fast ignition by use of a strong external DC magnetic field. The second part concerns laboratory modeling of some astrophysical phenomena, including 1) studies of the topological structure of magnetic reconnection/annihilation that relates closely to geomagnetic substorms, loop-top X-ray source and mass ejection in solar flares, and 2) magnetic field generation and evolution in collisionless shock formation.

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Strong magnetic fields generated with a simple open-ended coil irradiated by high power laser pulses

Cited by 42 publications

References 32 publications

Amplification of mid-infrared lasers via backscattering in magnetized plasmas

Amplification of mid-infrared lasers via backscattering in magnetized plasmas

Magnetized fast isochoric laser heating for efficient creation of ultra-high-energy-density states

Studies of high energy density physics and laboratory astrophysics driven by intense lasers

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