Design study of a combined interferometer and polarimeter for a high-field, compact tokamak

Creely, Alexander J.; Milanese, Lucio M.; Tolman, Elizabeth A.; Irby, James H.; Ballinger, Sean B.; Frank, Samuel; Kuang, Adam Q.; Linehan, Bryan L.; McCarthy, William; Montes, Kevin J.; Mouratidis, Theodore; Picard, Julian F.; Rodriguez-Fernandez, Pablo; Rosenthal, Aaron M.; Sandberg, Alexander J.; Sciortino, Francesco; Simpson, Raspberry A.; Tinguely, R. Alexander; Zhou, Muni; White, Anne E.

doi:10.1063/1.5142638

Title: Design study of a combined interferometer and polarimeter for a high-field, compact tokamak

Journal Article · Thu Apr 23 00:00:00 EDT 2020 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.5142638· OSTI ID:1800760

^[1];

^[1]; Tolman, Elizabeth A. ^[1]; Irby, James H. ^[1]; Ballinger, Sean B. ^[1]; Frank, Samuel ^[1];

^[1]; Linehan, Bryan L. ^[1]; McCarthy, William ^[1]; Montes, Kevin J. ^[1]; Mouratidis, Theodore ^[1]; Picard, Julian F. ^[1];

^[1]; Rosenthal, Aaron M. ^[1]; Sandberg, Alexander J. ^[1]; Sciortino, Francesco ^[1];

^[1];

^[1]; White, Anne E. ^[1]

Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center

This article is the first design study of a combined interferometer and polarimeter on a compact, high-field, high-density, net-energy tokamak. Recent advances in superconducting technology have made possible designs for compact, high magnetic field fusion power plants, such as ARC [Sorbom et al., Fusion Eng. Des. 100, 378 (2015)], and experiments, such as SPARC [Greenwald et al., PSFC Report No. RR-18-2 (2018)]. These new designs create both challenges and opportunities for plasma diagnostics. The diagnostic proposed in this work, called InterPol, takes advantage of unique opportunities provided by high magnetic field and density to measure both line-averaged density and poloidal magnetic field with a single set of CO₂ and quantum cascade lasers. These measurements will be used for fast density feedback control, constraint of density and safety factor profiles, and density fluctuation measurements. Synthetic diagnostic testing using a model machine geometry, called MQ1 (Mission Q ≥ 1), and profiles simulated with Tokamak Simulation Code indicate that InterPol will be able to measure steady state density and poloidal magnetic field, as well as fluctuations caused by toroidal Alfven eigenmodes and other phenomena on a high-field compact tokamak.

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Research Organization:: Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: FG02-91ER54109

OSTI ID:: 1800760

Alternate ID(s):: OSTI ID: 1615872

Journal Information:: Physics of Plasmas, Vol. 27, Issue 4; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 3 works

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