A magnetic particle time-of-flight (MagPTOF) diagnostic for measurements of shock- and compression-bang time at the NIF (invited)

H G Rinderknecht; H Sio; J A Frenje; J Magoon; A Agliata; M Shoup; S Ayers; C G Bailey; M Gatu Johnson; A B Zylstra; N Sinenian; M J Rosenberg; C K Li; F H Sèguin; R D Petrasso; J R Rygg; J R Kimbrough; A Mackinnon; P Bell; R Bionta; T Clancy; R Zacharias; A House; T Döppner; H S Park; S LePape; O Landen; N Meezan; H Robey; V U Glebov; M Hohenberger; C Stoeckl; T C Sangster; C Li; J Parat; R Olson; J Kline; J Kilkenny

doi:10.1063/1.4886775

A magnetic particle time-of-flight (MagPTOF) diagnostic for measurements of shock- and compression-bang time at the NIF (invited)

Rev Sci Instrum. 2014 Nov;85(11):11D901. doi: 10.1063/1.4886775.

Authors

H G Rinderknecht¹, H Sio¹, J A Frenje¹, J Magoon², A Agliata², M Shoup², S Ayers³, C G Bailey³, M Gatu Johnson¹, A B Zylstra¹, N Sinenian¹, M J Rosenberg¹, C K Li¹, F H Sèguin¹, R D Petrasso¹, J R Rygg³, J R Kimbrough³, A Mackinnon³, P Bell³, R Bionta³, T Clancy³, R Zacharias³, A House³, T Döppner³, H S Park³, S LePape³, O Landen³, N Meezan³, H Robey³, V U Glebov², M Hohenberger², C Stoeckl², T C Sangster², C Li⁴, J Parat⁴, R Olson⁵, J Kline⁶, J Kilkenny⁷

Affiliations

¹ Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
² Laboratory for Laser Energetics, Rochester, New York 14623, USA.
³ Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
⁴ Dexter Magnetic Technologies, Elk Grove Village, Illinois 60007, USA.
⁵ Sandia National Laboratory, Albuquerque, New Mexico 87123, USA.
⁶ Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
⁷ General Atomics, San Diego, California 92121, USA.

PMID: 25430279
DOI: 10.1063/1.4886775

Abstract

A magnetic particle time-of-flight (MagPTOF) diagnostic has been designed to measure shock- and compression-bang time using D(3)He-fusion protons and DD-fusion neutrons, respectively, at the National Ignition Facility (NIF). This capability, in combination with shock-burn weighted areal density measurements, will significantly constrain the modeling of the implosion dynamics. This design is an upgrade to the existing particle time-of-flight (pTOF) diagnostic, which records bang times using DD or DT neutrons with an accuracy better than ±70 ps [H. G. Rinderknecht et al., Rev. Sci. Instrum. 83, 10D902 (2012)]. The inclusion of a deflecting magnet will increase D(3)He-proton signal-to-background by a factor of 1000, allowing for the first time simultaneous measurements of shock- and compression-bang times in D(3)He-filled surrogate implosions at the NIF.