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Title: Magnetic fluorescent lamp having reduced ultraviolet self-absorption

Abstract

The radiant emission of a mercury-argon discharge in a fluorescent lamp assembly (10) is enhanced by providing means (30) for establishing a magnetic field with lines of force along the path of electron flow through the bulb (12) of the lamp assembly, to provide Zeeman splitting of the ultraviolet spectral line. Optimum results are obtained when the magnetic field strength causes a Zeeman splitting of approximately 1.7 times the thermal line width.

Inventors:
 [1];  [2]
  1. (San Francisco, CA)
  2. (Pelham, NY)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA
OSTI Identifier:
865651
Patent Number(s):
US 4549110
Assignee:
United States of America as represented by Department of Energy (Washington, DC) LBNL
DOE Contract Number:
AC03-76SF00098
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
magnetic; fluorescent; lamp; reduced; ultraviolet; self-absorption; radiant; emission; mercury-argon; discharge; assembly; 10; enhanced; providing; means; 30; establishing; field; lines; force; path; electron; flow; bulb; 12; provide; zeeman; splitting; spectral; line; optimum; results; obtained; strength; causes; approximately; times; thermal; width; spectral line; fluorescent lamp; magnetic field; field strength; electron flow; lamp assembly; providing means; line width; thermal line; argon discharge; /313/315/

Citation Formats

Berman, Samuel M., and Richardson, Robert W.. Magnetic fluorescent lamp having reduced ultraviolet self-absorption. United States: N. p., 1985. Web.
Berman, Samuel M., & Richardson, Robert W.. Magnetic fluorescent lamp having reduced ultraviolet self-absorption. United States.
Berman, Samuel M., and Richardson, Robert W.. 1985. "Magnetic fluorescent lamp having reduced ultraviolet self-absorption". United States. doi:. https://www.osti.gov/servlets/purl/865651.
@article{osti_865651,
title = {Magnetic fluorescent lamp having reduced ultraviolet self-absorption},
author = {Berman, Samuel M. and Richardson, Robert W.},
abstractNote = {The radiant emission of a mercury-argon discharge in a fluorescent lamp assembly (10) is enhanced by providing means (30) for establishing a magnetic field with lines of force along the path of electron flow through the bulb (12) of the lamp assembly, to provide Zeeman splitting of the ultraviolet spectral line. Optimum results are obtained when the magnetic field strength causes a Zeeman splitting of approximately 1.7 times the thermal line width.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1985,
month = 1
}

Patent:

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  • The radiant emission of a mercury-argon discharge in a fluorescent lamp assembly is enhanced by providing means for establishing a magnetic field with lines of force along the path of electron flow through the bulb of the lamp assembly, to provide Zeeman splitting of the ultraviolet spectral line. Optimum results are obtained when the magnetic field strength causes a Zeeman splitting of approximately 1.7 times the thermal line width.
  • The radiant emission of a mercury-argon discharge in a fluorescent lamp assembly is enhanced by providing means for establishing a magnetic field with lines of force along the path of electron flow through the bulb of the lamp assembly, to provide Zeeman splitting of the ultraviolet spectral line. Optimum results are obtained when the magnetic field strength causes a Zeeman splitting of approximately 1.7 times the thermal line width.
  • A fluorescent lamp wherein magnetic field generating means (e.g., permanent magnets) are utilized to generate a static magnetic field across the respective electrode structures of the lamp such that maximum field strength is located at the electrode's filament. An increase in efficacy during operation has been observed.
  • A fluorescent lamp unit having a magnetic field generating means for improving the performance of the fluorescent lamp is disclosed. In a preferred embodiment the fluorescent lamp comprises four longitudinally extending leg portions disposed in substantially quadrangular columnar array and joined by three generally U-shaped portions disposed in different planes. In another embodiment of the invention the magnetic field generating means comprises a plurality of permanent magnets secured together to form a single columnar structure disposed within a centrally located region defined by the shape of lamp envelope.
  • A fluorescent lamp wherein magnetic field generating means (e.g., permanent magnets) are utilized to generate a static magnetic field across the respective electrode structures of the lamp such that maximum field strength is located at the electrode's filament. An increase in efficacy during operation has been observed. 2 figs.