Vertical-viewing electron cyclotron emission diagnostic for the DIII-D tokamak

Journal Article · Mon Aug 01 00:00:00 EDT 1988 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1140162· OSTI ID:6906354

James, R; Janz, S; Ellis, R; Boyd, D; Lohr, J

The vertical-viewing electron cyclotron emission diagnostic on DIII-D will be used to assess the nonthermal electron distributions resulting from electron cyclotron heating and electron cyclotron current drive experiments. Electron cyclotron emission along a vertical chord is collected using an ellipsoidal focusing mirror and retroreflector (the latter to minimize wall reflections). The emission is then transported approx.20 m using a quasioptical transport system composed of eight lenses and three mirrors, and detected between the 2nd and the 10th harmonics by a fast-scanning (40-Hz) Michelson interferometer. The entire system has been aligned using a Gaussian beam simulator and absolutely calibrated in situ using a cold liquid-nitrogen bath. Details of the design, installation, and calibration will be discussed.

• Research Organization: General Atomics Technologies, Inc., San Diego, California 92138
• OSTI ID: 6906354
• Journal Information: Rev. Sci. Instrum.; (United States), Vol. 59:8
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DOUBLET-3 DEVICE
PLASMA DIAGNOSTICS
OPTICAL EQUIPMENT
CALIBRATION
ECR HEATING
ELECTRON CYCLOTRON-RESONANCE
MIRRORS
OPTICAL SYSTEMS
CLOSED PLASMA DEVICES
CYCLOTRON RESONANCE
EQUIPMENT
HEATING
HIGH-FREQUENCY HEATING
PLASMA HEATING
RESONANCE
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
700102* - Fusion Energy- Plasma Research- Diagnostics