Send to

Choose Destination
See comment in PubMed Commons below
Rev Sci Instrum. 2009 Nov;80(11):113501. doi: 10.1063/1.3258199.

Electron density measurements of a field-reversed configuration plasma using a novel compact ultrastable second-harmonic interferometer.

Author information

  • 1Department of Physics, University of Pisa, Largo B. Pontecorvo 3, 56127 Pisa, Italy.


A compact high-sensitivity second-harmonic interferometer for line-integrated electron density measurements on a large plasma machine is presented. The device is based on a fiber coupled near-infrared continuous-wave Nd:YAG laser and is remotely controlled. The performances of the instrument are tested on the Irvine field-reversed configuration machine, and a sensitivity of few 10(14) cm(-2) in measuring line integrated electron density is demonstrated with a time resolution of a few microseconds. The interferometer is self calibrated, has an impressive stability, and it does not require any further alignment after proper installation. These features make this device a real turn-key system suitable for electron density measurement in large plasma machines.

PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for American Institute of Physics
    Loading ...
    Write to the Help Desk