Details

Autor(en) / Beteiligte

• Shan, L Q
• Cai, H B
• Zhang, W S
• Tang, Q
• Zhang, F
• Song, Z F
• Bi, B
• Ge, F J
• Chen, J B
• Liu, D X
• Wang, W W
• Yang, Z H
• Qi, W
• Tian, C
• Yuan, Z Q
• Zhang, B
• Yang, L
• Jiao, J L
• Cui, B
• Zhou, W M
• Cao, L F
• Zhou, C T
• Gu, Y Q
• Zhang, B H
• Zhu, S P
• He, X T

Titel

Experimental Evidence of Kinetic Effects in Indirect-Drive Inertial Confinement Fusion Hohlraums

Ist Teil von

• Physical review letters, 2018-05, Vol.120 (19), p.195001-195001, Article 195001

Ort / Verlag

United States: American Physical Society

Erscheinungsjahr

2018

Quelle

PROLA

Beschreibungen/Notizen

• We present the first experimental evidence supported by simulations of kinetic effects launched in the interpenetration layer between the laser-driven hohlraum plasma bubbles and the corona plasma of the compressed pellet at the Shenguang-III prototype laser facility. Solid plastic capsules were coated with carbon-deuterium layers; as the implosion neutron yield is quenched, DD fusion yield from the corona plasma provides a direct measure of the kinetic effects inside the hohlraum. An anomalous large energy spread of the DD neutron signal (∼282  keV) and anomalous scaling of the neutron yield with the thickness of the carbon-deuterium layers cannot be explained by the hydrodynamic mechanisms. Instead, these results can be attributed to kinetic shocks that arise in the hohlraum-wall-ablator interpenetration region, which result in efficient acceleration of the deuterons (∼28.8  J, 0.45% of the total input laser energy). These studies provide novel insight into the interactions and dynamics of a vacuum hohlraum and near-vacuum hohlraum.