Design study of a combined interferometer and polarimeter for a high-field, compact tokamak
Abstract
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 Alfvén eigenmodes and other phenomena on a high-field compact tokamak.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 01, 2020
- Source ID
- 10.1063/1.5142638
Entities
People
- A. Rosenthal
- Adam Qingyang Kuang
- Alexander Creely
- Alexander J. Sandberg
- Anne E. White
- Bryan L. Linehan
- Elizabeth A. Tolman
- Francesco Sciortino
- James H. Irby
- Julian F. Picard
- Kevin Montes
- Lucio M. Milanese
- Muni Zhou
- P Rodriguez-Fernandez
- R. A. Tinguely
- Raspberry Simpson
- Samuel Frank
- Sean B. Ballinger
- Theodore Mouratidis
- William Mccarthy
Organizations
- ARPA-E
- Massachusetts Institute of Technology
- National Science Foundation