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Title: Controlling the vapor pressure of a mercury lamp

Abstract

The invention described herein discloses a method and apparatus for controlling the Hg vapor pressure within a lamp. This is done by establishing and controlling two temperature zones within the lamp. One zone is colder than the other zone. The first zone is called the cold spot. By controlling the temperature of the cold spot, the Hg vapor pressure within the lamp is controlled. Likewise, by controlling the Hg vapor pressure of the lamp, the intensity and linewidth of the radiation emitted from the lamp is controlled. 2 figs.

Inventors:
;
Publication Date:
OSTI Identifier:
7168592
Patent Number(s):
US 4746832; A
Application Number:
PPN: US 6-816558
Assignee:
GTE Products Corp., Danvers, MA (United States) PTO; EDB-94-115804
DOE Contract Number:
AC03-76SF00098
Resource Type:
Patent
Resource Relation:
Patent File Date: 31 Dec 1985
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; LIGHT BULBS; DESIGN; MERCURY; PRESSURE CONTROL; TEMPERATURE CONTROL; TEMPERATURE GRADIENTS; CONTROL; ELEMENTS; METALS; 320106* - Energy Conservation, Consumption, & Utilization- Building Equipment- (1987-)

Citation Formats

Grossman, M.W., and George, W.A.. Controlling the vapor pressure of a mercury lamp. United States: N. p., 1988. Web.
Grossman, M.W., & George, W.A.. Controlling the vapor pressure of a mercury lamp. United States.
Grossman, M.W., and George, W.A.. 1988. "Controlling the vapor pressure of a mercury lamp". United States. doi:.
@article{osti_7168592,
title = {Controlling the vapor pressure of a mercury lamp},
author = {Grossman, M.W. and George, W.A.},
abstractNote = {The invention described herein discloses a method and apparatus for controlling the Hg vapor pressure within a lamp. This is done by establishing and controlling two temperature zones within the lamp. One zone is colder than the other zone. The first zone is called the cold spot. By controlling the temperature of the cold spot, the Hg vapor pressure within the lamp is controlled. Likewise, by controlling the Hg vapor pressure of the lamp, the intensity and linewidth of the radiation emitted from the lamp is controlled. 2 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1988,
month = 5
}
  • The present invention is directed to a method of eliminating the cold spot zones presently used on Hg.sup.196 isotope separation lamps and filters by the use of a mercury amalgams, preferably mercury - indium amalgams. The use of an amalgam affords optimization of the mercury density in the lamp and filter of a mercury enrichment reactor, particularly multilamp enrichment reactors. Moreover, the use of an amalgam in such lamps and/or filters affords the ability to control the spectral line width of radiation emitted from lamps, a requirement for mercury enrichment.
  • The present invention is directed to a method of eliminating the cold spot zones presently used on Hg[sup 196] isotope separation lamps and filters by the use of a mercury amalgams, preferably mercury - indium amalgams. The use of an amalgam affords optimization of the mercury density in the lamp and filter of a mercury enrichment reactor, particularly multilamp enrichment reactors. Moreover, the use of an amalgam in such lamps and/or filters affords the ability to control the spectral line width of radiation emitted from lamps, a requirement for mercury enrichment.
  • The invention described herein discloses a method and apparatus for controlling the Hg vapor pressure within a lamp. This is done by establishing and controlling two temperature zones within the lamp. One zone is colder than the other zone. The first zone is called the cold spot. By controlling the temperature of the cold spot, the Hg vapor pressure within the lamp is controlled. Likewise, by controlling the Hg vapor pressure of the lamp, the intensity and linewidth of the radiation emitted from the lamp is controlled.
  • A high pressure metal vapor discharge lamp including an arc tube having opposed ends at which are provided respective main electrodes and a fill including mercury and a starting gas, a radioactive source material including a radioactive substance having a half-life less than 1X10/sup 4/ years sealed in the arc tube, an outer tube enclosing the arc tube and a circuit for starting the arc tube.
  • Selective ultraviolet photolysis using an unfiltered mercury arc lamp has been used to substantially reduce the phosgene impurity in a mixture of boron trichloride and phosgene. Infrared spectrophotometric analysis of the sample before and after irradiation shows that it is possible to highly purify commercially available boron trichloride with this method.