skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Doublet III Thomson-scattering-system hemiconcentric triplet lens

Abstract

The D-III Thomson Profile System Hemiconcentric Triplet lens is described herein. This objective lens is used to image a 120 cm long segment of a focused TEM/sub 00/ ruby laser beam onto a curved image plane where the light is collected by fiber optic bundles. This lens has a 100/sup 0/ field of view, focal length approx. = 12 inches, and magnification approx. = 1. The small ports on the D-III tokamak make it necessary to situate the objective lens aperture near the front of the lens, and to funnel the light through the narrow port opening. The hemiconcentric triplet lens aperture is located at its front surface and the refraction at this surface acts to funnel the light. The result is excellent light collection (light collection F = 6.7, lens f = 3.9) at the expense of reduced off-axis resolution due to astigmatism. At the edge of the field of view the worst-case resolution along the laser beam is about 3 cm. The excellent correction of spherical and chromatic aberrations of this lens, however, result in minimal additional width of the light collection fiber optic bundles transverse to the beam image. Despite the peculiar geometry for this lens, itsmore » relative small size and use of common glasses results in a cost which is less than a comparable concentric design.« less

Authors:
Publication Date:
Research Org.:
General Atomic Co., San Diego, CA (USA)
OSTI Identifier:
5259344
Report Number(s):
GA-A-16378
ON: DE82017384; TRN: 82-014462
DOE Contract Number:  
AT03-76ET51011
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; DOUBLET REACTORS; PLASMA DIAGNOSTICS; THOMSON SCATTERING; OPTICAL SYSTEMS; COST; LASER RADIATION; LENSES; RUBY LASERS; ELECTROMAGNETIC RADIATION; INELASTIC SCATTERING; LASERS; RADIATIONS; SCATTERING; SOLID STATE LASERS; THERMONUCLEAR REACTORS; TOKAMAK TYPE REACTORS; 700102* - Fusion Energy- Plasma Research- Diagnostics

Citation Formats

Vaslow, D. Doublet III Thomson-scattering-system hemiconcentric triplet lens. United States: N. p., 1981. Web.
Vaslow, D. Doublet III Thomson-scattering-system hemiconcentric triplet lens. United States.
Vaslow, D. Tue . "Doublet III Thomson-scattering-system hemiconcentric triplet lens". United States.
@article{osti_5259344,
title = {Doublet III Thomson-scattering-system hemiconcentric triplet lens},
author = {Vaslow, D},
abstractNote = {The D-III Thomson Profile System Hemiconcentric Triplet lens is described herein. This objective lens is used to image a 120 cm long segment of a focused TEM/sub 00/ ruby laser beam onto a curved image plane where the light is collected by fiber optic bundles. This lens has a 100/sup 0/ field of view, focal length approx. = 12 inches, and magnification approx. = 1. The small ports on the D-III tokamak make it necessary to situate the objective lens aperture near the front of the lens, and to funnel the light through the narrow port opening. The hemiconcentric triplet lens aperture is located at its front surface and the refraction at this surface acts to funnel the light. The result is excellent light collection (light collection F = 6.7, lens f = 3.9) at the expense of reduced off-axis resolution due to astigmatism. At the edge of the field of view the worst-case resolution along the laser beam is about 3 cm. The excellent correction of spherical and chromatic aberrations of this lens, however, result in minimal additional width of the light collection fiber optic bundles transverse to the beam image. Despite the peculiar geometry for this lens, its relative small size and use of common glasses results in a cost which is less than a comparable concentric design.},
doi = {},
url = {https://www.osti.gov/biblio/5259344}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1981},
month = {12}
}

Technical Report:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that may hold this item. Keep in mind that many technical reports are not cataloged in WorldCat.

Save / Share: