Development of a polarization resolved spectroscopic diagnostic for measurements of the vector magnetic field in the Caltech coaxial magnetized plasma jet experiment
- Creators
- Shikama, T.
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Bellan, P. M.
Abstract
In the Caltech coaxial magnetized plasma jet experiment, fundamental studies are carried out relevant to spheromak formation, astrophysical jet formation/propagation, solar coronal physics, and the general behavior of twisted magnetic flux tubes that intercept a boundary. In order to measure the spatial profile of the magnetic field vector for understanding the underlying physics governing the dynamical behavior, a non-perturbing visible emission spectroscopic method is implemented to observe the Zeeman splitting in emission spectra. We have designed and constructed a polarization-resolving optical system that can simultaneously detect the left- and right-circularly polarized emission. The system is applied to singly ionized nitrogen spectral lines. The magnetic field strength is measured with a precision of about ±13 mT. The radial profiles of the azimuthal and axial vector magnetic field components are resolved by using an inversion method.
Additional Information
© 2013 American Institute of Physics. Received 28 November 2012; accepted 11 February 2013; published online 28 February 2013. One of the authors (T.S.) acknowledges A. L. Moser, V. H. Chaplin, X. Zhai, and D. Felt for their technical assistance. This work was supported by U.S. DOE, NSF, and JSPS Institutional Program for Young Researcher Overseas Visits (Program for Educating and Cultivating International and Transdisciplinary Academians for Mechanical Engineering Education and Research) and Grant-in-Aid for Young Scientist (B) No. 24740367.Attached Files
Published - RevSciInstrum_84_023507.pdf
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Additional details
- Eprint ID
- 37549
- Resolver ID
- CaltechAUTHORS:20130319-090212361
- Department of Energy (DOE)
- NSF
- Japan Society for the Promotion of Science (JSPS)
- 24740367
- Created
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2013-03-20Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field