Ion optical design of the magnetic proton recoil neutron spectrometer for the SPARC tokamak
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103502_1_5.0219551.pdf
Description
Published version
Size
6.1 MB
Format
Adobe PDF
Checksum (MD5)
0c5245ce9273283dc731b0b3aef9b638
Author(s)
Mackie, S
Wink, CW
Dalla Rosa, M
Berg, GPA
Ball, JL
Wang, X
Carmichael, J
Tinguely, RA
Rigamonti, D
Tardocchi, M
Date Issued
October 1, 2024
Journal
Review of Scientific Instruments
Publisher
AIP Publishing
Citation
S. Mackie, C. W. Wink, M. Dalla Rosa, G. P. A. Berg, J. L. Ball, X. Wang, J. Carmichael, R. A. Tinguely, D. Rigamonti, M. Tardocchi, P. Raj, J. Frenje, J. Rice; Ion optical design of the magnetic proton recoil neutron spectrometer for the SPARC tokamak. Rev. Sci. Instrum. 1 October 2024; 95 (10): 103502.
Version
Final published version
Abstract
A magnetic proton recoil (MPR) neutron spectrometer is being designed for SPARC, a high magnetic field (BT = 12 T), compact (R0 = 1.85 m, a = 0.57 m) tokamak currently under construction in Devens, MA, USA. MPR neutron spectrometers are versatile tools for making high fidelity ab initio calibrated measurements of fusion neutron flux spectra and have been used to infer fusion power, ion temperature, fuel ion ratio, and suprathermal fuel populations at several high performance fusion experiments. The performance of an MPR neutron spectrometer is in large part determined by the design of the magnetic field, which disperses and focuses recoil protons. This article details the ion optical design of a high-resolution MPR neutron spectrometer, including the amelioration of image aberrations due to nonlinear effects. An optimized design is presented that achieves ion optical energy resolution δE/E < 1% and focal plane properties that enable straightforward integration with the hodoscope detector array.
MIT Department
Massachusetts Institute of Technology. Plasma Science and Fusion Center
Massachusetts Institute of Technology. Department of Chemistry
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Creative Commons Attribution-Noncommercial
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DOI of Published Version
https://doi.org/10.1063/5.0219551
