Inertial confinement fusion neutron images

Journal Article · Mon May 15 00:00:00 EDT 2006 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.2174828· OSTI ID:20783165

Disdier, L; Rouyer, A; Lantuejoul, I; Landoas, O; Bourgade, J L; Sangster, T C; Glebov, V Yu; Lerche, R A ^[1]

---

1. CEA-DAM Ile de France, BP 12, 91680 Bruyeres Le Chatel (France)

At the OMEGA laser facility [T. R. Boehly et al., Opt. Commun. 133, 495 (1997)], 14-MeV neutron images are acquired with a 20-{mu}m resolution and a large signal-to-noise ratio (SNR) using penumbral and ring apertures. The two aperture types produce coded images of the source that are unfolded using a similar autocorrelation method. The techniques provide comparable images for various deuterium-tritium filled target implosions, with glass and plastic (CH) shells. SNR analysis reveals that the annular (ring) technique will achieve a good image quality at the 10-{mu}m resolution level with the planned upgrade of our novel detector. The detector is an array of 85-{mu}m-diam capillary tubes filled with a liquid scintillator. Its resolution is limited to 650 {mu}m by the track length of the elastically scattered recoil protons. Replacing the hydrogen in the scintillator with deuterium improves detector spatial resolution to 325 {mu}m, and makes high source resolution achievable. The readout design provides an efficient light collection of the scintillation photons by relaying the image through a fiber optic taper. Improved efficiency produces images with better SNR. Also, the increased detector sensitivity allows single event recording of 2.45-MeV neutron interactions. For the first time ever, we show neutron images of deuterium filled, warm, and cryogenic target implosions.

• OSTI ID: 20783165
• Journal Information: Physics of Plasmas, Vol. 13, Issue 5; Other Information: DOI: 10.1063/1.2174828; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
APERTURES
CAPILLARIES
DEUTERIUM
HYDROGEN
ICF DEVICES
IMAGES
INERTIAL CONFINEMENT
LASER IMPLOSIONS
LASERS
LIQUID SCINTILLATION DETECTORS
MEV RANGE
NEUTRON DETECTION
NEUTRONS
PHOTONS
PLASMA DIAGNOSTICS
PLASTICS
PROTONS
SIGNAL-TO-NOISE RATIO
SPATIAL RESOLUTION
TRITIUM