Experimental method for plasma movement in a hole

Hang, 黎航 Li; Jiamin, 杨家敏 Yang; Haiying, 张海鹰 Zhang; Ruizhen, 于瑞珍 Yu; Shunchao, 巫顺超 Wu; Jianhua, 郑建华 Zheng; Yudong, 蒲昱东 Pu; Zhiwei, 林稚伟 Lin; Tuo, 朱托 Zhu; Zhurong, 曹柱荣 Cao; Wenyong, 缪文勇 Miao; Shenye, 刘慎业 Liu; Shaoen, 江少恩 Jiang; Yongkun, 丁永坤 Ding

doi:10.3788/hplpb20122410.2355

Cited by 2 publications

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“…The peak radiation temperature of the hohlraum used was about 180 eV (Ref. 16), and the self-emission of the radiationablated gold plasma was near Planckian with most of its radiation below 1 keV. Even if the plasma collided at the axis of the hole, the photon energy can hardly achieve 2 keV so quickly.…”

Section: Experimental Results and Analysismentioning

confidence: 99%

“…16 Because CCD counts Aðr; tÞ and XFC spectrum response R(E) [18][19][20] are relative, absolute gold plasma areal density d should be calculated by dividing the CCD counts A 1 , which is generated by the transmitted backlighter radiation through filling gold plasma in the small hole by A 0 , which is generated by direct backlighter radiation…”

Section: Experimental Results and Analysismentioning

confidence: 99%

“…In 2009, a new experiment was performed on the SG-II laser facility using laser-irradiated Ti disk to generate 2-5 keV X-ray as the intense backlighter source, 15 and a quantitative diagnostic method of plasma movement in the small hole was established. 16 In Sec. II, the experimental arrangements and the diagnostic method are introduced.…”

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confidence: 98%

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Observation of hydrodynamic processes of radiation-ablated plasma in a small hole

Song

Yang

et al. 2015

Physics of Plasmas

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In the hohlraum used in laser indirect-drive inertial confinement fusion experiments, hydrodynamic processes of radiation-ablated high-Z plasma have a great effect on laser injection efficiency, radiation uniformity, and diagnosis of hohlraum radiation field from diagnostic windows (DW). To study plasma filling in the DWs, a laser-irradiated Ti disk was used to generate 2–5 keV narrow energy band X-ray as the intense backlighter source, and laser-produced X-ray in a hohlraum with low-Z foam tamper was used to heat a small hole surrounded by gold wall with 150 μm in diameter and 100 μm deep. The hydrodynamic movement of the gold plasma in the small hole was measured by an X-ray framing camera and the results are analyzed. Quantitative measurement of the plasma areal density distribution and evolution in the small hole can be used to assess the effect of plasma filling on the diagnosis from the DWs.

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Section: Experimental Results and Analysismentioning

confidence: 99%

Section: Experimental Results and Analysismentioning

confidence: 99%

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Observation of hydrodynamic processes of radiation-ablated plasma in a small hole

Song

Yang

et al. 2015

Physics of Plasmas

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Variations of implosion asymmetry with hohlraum length and time in indirect-drive inertial confinement fusion

Li¹,

Pu²,

Jing³

et al. 2013

Acta Phys. Sin.

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In order to achieve the high density compression in laser indirect-drive inertial confinement fusion, the implosion symmetry and hohlraum radiation uniformity are strictly required. To study the variations of implosion asymmetry with hohlraum length and time, three kinds of hohlraum lengths are adopted in experiment. X-ray emission from capsule fuel is measured by an X-ray framing camera. Based on measured capsule compression process and ellipticity variation, it is preliminarily judged that the medium hohlraum of 1700 μm long is the closest to implosion symmetry demand of Shenguang Ⅲ prototype laser facility. Time-resolved implosion asymmetry is derived from a simplified analytic model, in which used is the time-resolved hohlraum radiation nonuniformity derived from a view-factor code. The derived results of the time-resolved implosion asymmetry are basically in agreement with experimental results. The physical mechanism for how hohlraum radiation nonuniformity evolution induces the variations of implosion asymmetry with hohlraum length and time is analyzed.

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Experimental method for plasma movement in a hole

Cited by 2 publications

References 0 publications

Observation of hydrodynamic processes of radiation-ablated plasma in a small hole

Observation of hydrodynamic processes of radiation-ablated plasma in a small hole

Variations of implosion asymmetry with hohlraum length and time in indirect-drive inertial confinement fusion

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