Extension of charged-particle spectrometer capabilities for diagnosing implosions on OMEGA, Z, and the NIF

B Lahmann; M Gatu Johnson; J A Frenje; A J Birkel; P J Adrian; N Kabadi; J H Kunimune; T M Johnson; J A Pearcy; B L Reichelt; F H Séguin; G Sutcliffe; R D Petrasso

doi:10.1063/5.0062584

Extension of charged-particle spectrometer capabilities for diagnosing implosions on OMEGA, Z, and the NIF

Rev Sci Instrum. 2021 Aug 1;92(8):083506. doi: 10.1063/5.0062584.

Authors

Affiliation

¹ Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.

PMID: 34470381
DOI: 10.1063/5.0062584

Abstract

New designs and a new analysis technique have been developed for an existing compact charged-particle spectrometer on the NIF and OMEGA. The new analysis technique extends the capabilities of this diagnostic to measure arbitrarily shaped ion spectra down to 1 MeV with yields as low as 10⁶. Three different designs are provided optimized for the measurement of DD protons, T³He deuterons, and ³He³He protons. The designs are highly customizable, and a generalized framework is provided for optimizing the design for alternative applications. Additionally, the understanding of the detector's response and uncertainties is greatly expanded upon. A new calibration procedure is also developed to increase the precision of the measurements.