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Proceedings Paper

Practical implementation and on the field test results of an enhanced algorithm for polarization optimization of the line length corrector of ALMA central local oscillator
Author(s): J. A. Castillo; E. A. Michael
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Paper Abstract

This paper describes the practical implementation and on the field test results of an Enhanced algorithm, based on Jones matrix Eigen analysis, to find the minimal polarization change points for the ALMA's line length corrector fiber stretcher. These points are complicated to find because they can be located at any point of the Poincare sphere and they also change after manipulation of fibers and with time, so the optimization of the fibers stretcher needs to be systematically checked and redone. The execution time of the original algorithm takes up to 20 minutes depending on the starting polarization state. This enhanced algorithm reduces this time in most of cases to less than a minute, with no intrinsic dependency on the starting point.

Paper Details

Date Published: 5 October 2012
PDF: 7 pages
Proc. SPIE 8452, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI, 84522N (5 October 2012); doi: 10.1117/12.925253
Show Author Affiliations
J. A. Castillo, Atacama Large Millimeter Array (Chile)
Univ. de Chile (Chile)
E. A. Michael, Univ. de Chile (Chile)


Published in SPIE Proceedings Vol. 8452:
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI
Wayne S. Holland, Editor(s)

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