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In-vessel design of a two-color heterodyne laser interferometer system for SPARC.

The Review of scientific instruments·2024
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Evaluating deuterated-xylene for use as a fusion neutron spectrometer.

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Design studies on electronics and data acquisition of a real time diamond spectrometer for the SPARC neutron camera.

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Synthetic measurements of runaway electron synchrotron emission in the SPARC tokamak.

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Publisher's Note: "Ion optical design of the magnetic proton recoil neutron spectrometer for the SPARC tokamak" [Rev. Sci. Instrum. 95, 103502 (2024)].

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Overview of the early campaign diagnostics for the SPARC tokamak (invited).

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SPARC x-ray diagnostics: Technical and functional overview.

D Vezinet1, C J Perks2, E Panontin2

  • 1Commonwealth Fusion Systems, Devens, Massachusetts 01434, USA.

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|September 9, 2024
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Area of Science:

  • Nuclear Fusion Science
  • Plasma Physics
  • X-ray Diagnostics

Background:

  • Tokamak fusion devices require sophisticated diagnostics for operational control and physics understanding.
  • X-ray measurements are crucial for monitoring plasma behavior, instabilities, and particle content.

Purpose of the Study:

  • To detail SPARC's three primary x-ray diagnostics and their roles in tokamak operation.
  • To explain the design and function of in-vessel tomography, ex-vessel scintillators, and Bragg spectrometers.
  • To highlight how diagnostic design supports safety (tritium containment, neutron shielding) and future sensor development.

Main Methods:

  • In-vessel soft x-ray tomography for plasma position, MHD activity, and impurities.
  • Ex-vessel hard x-ray scintillators for detecting runaway electrons during plasma startup.
  • X-ray Bragg spectrometers for ion temperature, plasma rotation, and impurity emission measurements.

Main Results:

  • The soft x-ray tomography provides early operational data.
  • Hard x-ray scintillators effectively detect runaway electrons.
  • Bragg spectrometers yield crucial data on ion temperature and plasma dynamics.

Conclusions:

  • SPARC's x-ray diagnostics are integral to tokamak operation and physics research.
  • The diagnostic designs balance data acquisition with critical safety and future innovation requirements.
  • These diagnostics enhance fusion power uncertainty reduction and plasma control capabilities.