25 ps neutron detector for measuring ICF-target burn history

Abstract

Thisisa preprint of a paper intended forpubUcation in a joumalor proceedings. Since changes may be made before publication, this preprint is made available with the .. understanding that it will not be cited or reproduced without the permission of the author. I)ISCI.AIM ER This document was prepared as an account of work sponsoredby an agency of the tlnited States Government. Neither the United States Government nor the L1niversity of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process diselosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial products, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring hy the I,_nited States Government or the [!niversity of ('alifornia. The views and opinions of authors expressed herein do not necessarily state or reflect those of the [ lnited States Government thereof, and shall not be used for advertising or product endorsement purposes.

Measuring shock-bang timing and ρR evolution of D3He implosions at OMEGA

“…These implosions were studied using a proton temporal diagnostic (PTD) for measurement of D 3 He burn history [20], and several proton spectrometers for measurements of time-integrated D 3 He proton energy spectra. Additional information about the implosions was obtained from the neutron temporal diagnostic (NTD) [21][22] …”

Time-resolved compression of a capsule with a cone to high density for fast-ignition laser fusion

“…rR is determined from the core centre to infinity. Error bars in time are based on the measurement accuracy of the timing diagnostics 38 . The rR error bars are based on a 14% uncertainty in the inferred rR, which is determined from the errors in the measured optical depth t (12%) and the mass absorption coefficient m (7%).…”

Multiple-view spectrally resolved x-ray imaging observations of polar-direct-drive implosions on OMEGA

“…[19][20][21][22][23]. Other diagnostics fielded in the experiments included a neutron time-of-flight detector comprising a scintillator counter connected to a photomultiplier for total neutron yield measurements [24], a nuclear temporal diagnostic (NTD) [25] to measure the fusion reaction-rate time-history of the implosion and bang time (i.e., peak of the burn rate time-history), and a gated filtered (10mil Be and 0.5mil Ti), broadband x-ray imager (LFC) equipped with 10µm pinholes, six MCP's and capable of recording up to six images per MCP for a total of up to 36 images [26]. The Ti filter employed in LFC significantly reduces image contributions from photon energies above the Ti K-edge at 4.966keV.…”