Design of a submillimeter-wave alpha particle Thomson scattering diagnostic for fusion plasmas

Journal Article · Mon Oct 01 00:00:00 EDT 1990 · Review of Scientific Instruments; (USA)

DOI:https://doi.org/10.1063/1.1141637· OSTI ID:6205806

Shefer, R E; Watterson, R L; Goodman, D; Klinkowstein, R E ^[1]

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1. Science Research Laboratory, Inc., Somerville, MA (USA)

A collective Thomson scattering system based on a NH{sub 3} laser master oscillator and a free-electron laser (FEL) amplifier operating at a wavelength of 152 {mu}m is described. The FEL is driven by a compact, high repetition rate induction linear accelerator developed at SRL. Operation of a prototype linac at a repetition rate of 1 kHz has been demonstrated. Simulations show that the FEL is capable of supplying the required 11 kW average (220 MW peak) radiated power for a successful Thomson scattering measurement with a measurement time of 100 ms. A detailed design of the tapered FEL wiggler and beam transport system has been completed. A high repetition rate CO{sub 2 } pump laser to be used in the FIR master oscillator has also been designed. This laser will employ a compact closed flow loop to achieve 1 kW average power, narrow line operation at a 1 kHz pulse rate.

• DOE Contract Number: AC01-89ER80829
• OSTI ID: 6205806
• Journal Information: Review of Scientific Instruments; (USA), Vol. 61:10; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
PLASMA DIAGNOSTICS
THOMSON SCATTERING
ALPHA PARTICLES
COMPACT IGNITION TOKAMAK
FREE ELECTRON LASERS
LINEAR ACCELERATORS
OPERATION
WIGGLER MAGNETS
ACCELERATORS
CHARGED PARTICLES
CLOSED PLASMA DEVICES
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
EQUIPMENT
INELASTIC SCATTERING
LASERS
MAGNETS
SCATTERING
THERMONUCLEAR DEVICES
THERMONUCLEAR REACTORS
TOKAMAK DEVICES
TOKAMAK TYPE REACTORS
700102* - Fusion Energy- Plasma Research- Diagnostics