Study of the Compression of a Condensed Deuterated Target Installed on the Wire Array Axis
- 作者: Aleksandrov V.1, Volkov G.1, Grabovski E.1, Gritsuk A.1, Volobuev I.2, Kalinin Y.3, Korolev V.3, Laukhin Y.1, Medovshchikov S.1, Mitrofanov K.1, Oleinik G.1, Pimenov V.4, Smirnova E.3, Frolov I.1
-
隶属关系:
- Troitsk Institute for Innovation and Fusion Research
- Lebedev Physical Institute, Russian Academy of Sciences
- National Research Center “Kurchatov Institute”
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences
- 期: 卷 45, 编号 9 (2019)
- 页面: 805-820
- 栏目: Plasma Dynamics
- URL: https://journals.rcsi.science/1063-780X/article/view/187030
- DOI: https://doi.org/10.1134/S1063780X19090022
- ID: 187030
如何引用文章
详细
The implosion of combined loads consisting of an outer wire (fiber) array and inner cylindrical target was studied experimentally at the Angara-5-1 facility (3.5 MA, 100 ns) at currents of up to 3.5 MA. The experiments were carried out with 12- and 20-mm-diameter outer arrays made of 15-μm-diameter aluminum wires, composite arrays made of aluminum wires and 25-μm-diameter kapron fibers, and arrays made of kapron fibers with a 1-μm-thick aluminum coating. The number of wires varied from 10 to 40. The targets were made of agar-agar or low-density deuterated polyethylene. The parameters of the Z-pinch plasma were determined using the Angara-5-1 diagnostic complex, which included optical streak cameras, X-ray frame cameras, X-ray detectors, X-ray pinhole cameras, neutron detectors, and a mica-crystal X-ray spectrograph. It is established that the plasma compression dynamics and the formation of local plasma structures generating neutrons depend on the load configuration: the array diameter, the number of wires (fibers), and the diameter and density of the target. The most efficient compression and the highest plasma parameters (the compression ratio and plasma temperature), as well as the highest neutron yield, were achieved in experiments with 12-mm-diameter aluminum wire arrays inside which a 1-mm-diameter deuterated target with a mass density of 0.3 g/cm3 was installed As a result of collision of the bulk of the array mass with the inner target, a compact pinch with a diameter of ≈0.5 mm forms. The pinch formation is accompanied by the generation of a soft X-ray pulse. The development of MHD instabilities in the pinch plasma results in the formation of multiple hot spots (HSs) on the pinch axis with a typical size of 200–300 μm and an electron temperature of 0.4–0.7 keV. The HS formation is accompanied by emission of neutrons with a mean energy of 2.7 ± 0.2 MeV. The maximum neutron yield achieved in these experiments was 2.6 × 1010 neutrons/shot.
作者简介
V. Aleksandrov
Troitsk Institute for Innovation and Fusion Research
Email: Korolev_VD@nrcki.ru
俄罗斯联邦, Moscow, 142190
G. Volkov
Troitsk Institute for Innovation and Fusion Research
Email: Korolev_VD@nrcki.ru
俄罗斯联邦, Moscow, 142190
E. Grabovski
Troitsk Institute for Innovation and Fusion Research
Email: Korolev_VD@nrcki.ru
俄罗斯联邦, Moscow, 142190
A. Gritsuk
Troitsk Institute for Innovation and Fusion Research
Email: Korolev_VD@nrcki.ru
俄罗斯联邦, Moscow, 142190
I. Volobuev
Lebedev Physical Institute, Russian Academy of Sciences
Email: Korolev_VD@nrcki.ru
俄罗斯联邦, Moscow, 119991
Yu. Kalinin
National Research Center “Kurchatov Institute”
Email: Korolev_VD@nrcki.ru
俄罗斯联邦, Moscow, 123182
V. Korolev
National Research Center “Kurchatov Institute”
编辑信件的主要联系方式.
Email: Korolev_VD@nrcki.ru
俄罗斯联邦, Moscow, 123182
Ya. Laukhin
Troitsk Institute for Innovation and Fusion Research
Email: Korolev_VD@nrcki.ru
俄罗斯联邦, Moscow, 142190
S. Medovshchikov
Troitsk Institute for Innovation and Fusion Research
Email: Korolev_VD@nrcki.ru
俄罗斯联邦, Moscow, 142190
K. Mitrofanov
Troitsk Institute for Innovation and Fusion Research
Email: Korolev_VD@nrcki.ru
俄罗斯联邦, Moscow, 142190
G. Oleinik
Troitsk Institute for Innovation and Fusion Research
Email: Korolev_VD@nrcki.ru
俄罗斯联邦, Moscow, 142190
V. Pimenov
Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences
Email: Korolev_VD@nrcki.ru
俄罗斯联邦, Moscow, 119991
E. Smirnova
National Research Center “Kurchatov Institute”
Email: Korolev_VD@nrcki.ru
俄罗斯联邦, Moscow, 123182
I. Frolov
Troitsk Institute for Innovation and Fusion Research
Email: Korolev_VD@nrcki.ru
俄罗斯联邦, Moscow, 142190