Laser-Target Experiments at PALS for Deuterium Plasma Beam Fusion

被引：1

作者：

Krasa, J. ^{[1
]}

Klir, D. ^{[2
]}

Cikhardt, J. ^{[2
,3
]}

Pfeifer, M. ^{[1
,3
]}

Hora, H. ^{[4
,5
]}

Krupka, M. ^{[1
,3
,6
]}

Rezac, K. ^{[2
]}

Dudzak, R. ^{[1
,3
]}

Dostal, J. ^{[1
,3
]}

Burian, T. ^{[1
,3
]}

Krus, M. ^{[3
]}

Skala, J. ^{[1
]}

Jungwirth, K. ^{[1
]}

Rusiniak, Z. ^{[7
]}

Pisarczyk, T. ^{[7
]}

Chodukowski, T. ^{[7
]}

机构：

[1] Czech Acad Sci, Inst Phys, Prague, Czech Republic

[2] Czech Tech Univ, Fac Elect Engn, Prague, Czech Republic

[3] Czech Acad Sci, Inst Plasma Phys, Prague, Czech Republic

[4] HB11 Energy PL, 11 Wyndora Ave, Freshwater, NSW 2096, Australia

[5] Univ NSW, Dept Theoret Phys, Sydney, NSW, Australia

[6] Czech Tech Univ, Fac Nucl Sci & Phys Engn, Prague, Czech Republic

[7] Inst Plasma Phys & Laser Micro Fus, Warsaw, Poland

来源：

ACTA PHYSICA POLONICA A | 2020年 / 138卷 / 04期

关键词：

NEUTRON-PRODUCTION;

D O I：

10.12693/APhysPolA.138.579

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The Prague Asterix Laser System (PALS) is a terawatt iodine laser (1.2 kJ, 350 ps, 1315 nm), designed to deliver irradiance on target of about 3 x 10(16) W/cm(2). The PALS laser together with a Ti:sapphire laser (1 J, 50 fs, 800 nm) is used for experiments allowing femtosecond probing of laser-produced plasma. We present an experimental study of emission of hot electrons, fast ions and fusion neutrons generated through the H-2(d;n)He-3 fusion reaction of deuterons. During the laser-plasma interaction and plasma expansion, a multi-population of electrons appears. Non-isotropic emission of fast as well as thermal electrons is typical for the interaction of nanosecond laser radiation with plasma. The production of relativistic electrons makes it possible to accelerate protons to MeV energy and generate fusion neutrons via fusion reactions. The DD-neutron yield is compared to yields obtained from other experiments. Depending on the energy of the laser pulse, it is shown that the competition of laser contrast and laser pulse intensity sets a fundamental constraint on the ion emission and the resultant neutron yield performance of deuterated targets.

引用

页码：579 / 585

页数：7

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