APD detector electronics for the NSTX Thomson scattering system

Large area avalanche photodiode detector array upgrade for a ruby-laser Thomson scattering system

A low-cost upgrade has been implemented on the Madison Symmetric Torus ~MST! ruby-laser Thomson scattering ~TS! system to increase spectral coverage and substantially improve the signal-to-noise ratio ~SNR!. The spectral resolution has been increased from five channels on the long-wavelength side to an 11-channel system, which covers both sides of the laser line. Coverage on both sides of the s...

New High Resolution Thomson Scattering System for the COMPASS Tokamak

The COMPASS tokamak is being re-installed at IPP Prague after its transfer from Culham, U.K. Within the innovation, new diagnostics will be constructed, including a High Resolution Thomson Scattering System measuring electron temperature (Te) and electron density (ne) profiles. Scientific programme of the COMPASS tokamak is focused on the pedestal studies, thus the main stress will be laid on t...

Novel small-angle collective Thomson scattering system.

A Thomson scattering opticals system is described with the following characteristics: (1) it allows scattering angles down to 1 mrad before collection optics interfere with beam dumping; (2) it gives excellent k resolution for angles of > or approximately 1.5 mrad; (3) it collects light from a scattering volume which can be variably positioned without optical realignment; and (4) it is compact ...

Design of a new Nd:YAG Thomson scattering system for MAST.

A new infrared Thomson scattering system has been designed for the MAST tokamak. The system will measure at 120 spatial points with approximately 10 mm resolution across the plasma. Eight 30 Hz 1.6 J Nd:YAG lasers will be combined to produce a sampling rate of 240 Hz. The lasers will follow separate parallel beam paths to the MAST vessel. Scattered light will be collected at approximately f/6 o...

Recent improvement of the LHD Thomson scattering system