A fused silica Cherenkov radiator for high precision time-of-flight measurement of DT γ and neutron spectra (invited)

被引：30

作者：

Moore, A. S. ^{[1
]}

Schlossberg, D. J. ^{[1
]}

Hartouni, E. P. ^{[1
]}

Sayre, D. ^{[1
]}

Eckart, M. J. ^{[1
]}

Hatarik, R. ^{[1
]}

Barbosa, F. ^{[1
]}

Root, J. ^{[1
]}

Waltz, C. ^{[1
]}

Beeman, B. ^{[1
]}

Rubery, M. S. ^{[2
]}

Grim, G. P. ^{[1
]}

机构：

[1] Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94551 USA

[2] AWE Aldermaston, Directorate Sci & Technol, Reading RG7 4PR, Berks, England

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2018年 / 89卷 / 10期

关键词：

NUCLEAR-DATA;

D O I：

10.1063/1.5039322

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A fused silica Cherenkov radiator has been implemented at the National Ignition Facility to provide a new high precision measurement of the time-of-flight spectrum of 14.1 MeV DT fusion neutrons. This detector enables a high precision (< 30 ps) co-registered measurement of both a thresholded gamma-ray and a neutron spectrum on a single record. Other methods typically require gamma and neutron signals to be co-registered via other diagnostics and/or dedicated timing experiments. Analysis of the co-registered gamma and neutron signals allows precise extraction of the mean neutron energy and bulk hot-spot velocity, both of which were not possible with prior scintillator technologies. Initial measurements demonstrate the feasibility of this measurement and indicate that combined detection of neutrons and gamma-rays on multiple lines-of-sight should enable the bulk vector velocity of the implosion hot-spot to be determined to approximate to 5 km/s and reduced uncertainty in the spectral width approximate to 0.1 keV. Published by AIP Publishing.

引用

页数：9

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