Abstract
A multi-chord interferometer system is established on the HUST Field Reversed Configuration (HFRC). Configured as a Mach-Zehnder heterodyne interferometer with seven probe chords distributed in the HFRC middle plane, the system is designed to estimate the integral density within the collisional-merging and compression region of the device. With a spatial resolution of 6 cm and a radial coverage range from -7 cm to 31 cm, it provides a density measurement range of 2 × 1018∼1 × 1021m−2. A 10.6 μm CO2 laser serves as the laser source, while an acoustic-optic modulator (AOM) generates a modulation frequency of 40 MHz corresponding to a temporal resolution of 25 ns. A laser interferometric reference chord and a fitting vibration compensation method are implemented to reduce frequency drift and vibration noise. Preliminary experimental results show that the phase resolution within 0.052rad has been achieved, which corresponds to a minimum measurable density of ∼2×1018m−2. Beyond the density profile measurements, the multi-chord interferometer system plays a pivotal role in observing instabilities of FRC plasmas.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
