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Development of a phase contrast imaging system based on a yttrium aluminum garnet laser with folded beam for observations of density fluctuations in compact helical system

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7 Author(s)
Matsuo, K. ; Fukuoka Institute of Technology, 3-30-1 Wajirohigashi Higashi-ku, Fukuoka-shi, Fukuoka 811-0295, Japan ; Uchida, N. ; Kawakubo, M. ; Iguchi, H.
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A near-infrared laser phase contrast optical system incorporating a folded beam was developed in order to measure the distribution of density fluctuations in a high-temperature plasma. The coherent light source used was an yttrium aluminum garnet laser stabilized by a ring oscillator. The probe beam system separates and reflects the incident and exiting beams with a polarizer and a fully reflective mirror with a waveplate. This system was employed with a compact helical system to detect fluctuations at the plasma edge.

Published in:

Review of Scientific Instruments  (Volume:79 ,  Issue: 10 )