RF driven sulfur lamp having driving electrodes which face each other
- Lafayette, CA
- Castro Valley, CA
- Oakland, CA
- Orinda, CA
- San Francisco, CA
A high intensity discharge lamp without mercury is disclosed radiating a selected spectrum of which can be almost entirely in the visible range from an envelope that contains a sulfur containing substance. The lamp utilizes a signal source that generates an excitation signal that is externally coupled to the exterior surface of the envelope to excite the enclosed sulfur containing substance. Various embodiments of the lamp use electrodes adjacent the envelope to couple the excitation signal thereto with the face of the electrodes shaped to complement the shape of the exterior surface of the envelope. Two shapes discussed are spherical and cylindrical. To minimize filamentary discharges each envelope may include an elongated stem affixed to the exterior thereof whereby a rotational subsystem spins the envelope. In yet another embodiment the envelope has a Dewar configuration with two electrodes, one positioned near the external curved side surface of the body, and a second to the inner surface of the hole through the envelope. Further, the envelope may contain a backfill of a selected inert gas to assist in the excitation of lamp with that backfill at a pressure of less than 1 atmosphere, wherein the backfill pressure is directly related to the increase or decrease of peak output and inversely related to the increase and decrease of the emitted spectrum from the envelope. The emitting fill can be less than 6 mg/cc, or at least 2 mg/cc of the envelope of a sulfur containing substance.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- DOE Contract Number:
- AC03-76SF00098
- Assignee:
- Regents of University of California (Oakland, CA)
- Patent Number(s):
- US 5914564
- OSTI ID:
- 872346
- Country of Publication:
- United States
- Language:
- English
Detection of sulfur dimers in SF 6 and SF 6 /O 2 plasma‐etching discharges
|
journal | April 1989 |
Technique for measuring rotational temperature of microwave excited diatomic sulfur
|
journal | January 1980 |
Stable pure sulfur discharges and associated spectra
|
journal | August 1980 |
Radiative efficiencies of radio frequency sulfur discharges
|
journal | July 1985 |
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Related Subjects
driven
sulfur
lamp
driving
electrodes
intensity
discharge
mercury
disclosed
radiating
selected
spectrum
entirely
visible
range
envelope
contains
containing
substance
utilizes
signal
source
generates
excitation
externally
coupled
exterior
surface
excite
enclosed
various
embodiments
adjacent
couple
thereto
shaped
complement
shape
shapes
discussed
spherical
cylindrical
minimize
filamentary
discharges
elongated
affixed
whereby
rotational
subsystem
spins
embodiment
dewar
configuration
positioned
near
external
curved
inner
contain
backfill
inert
gas
assist
pressure
atmosphere
directly
related
increase
decrease
peak
output
inversely
emitted
emitting
fill
mg
cc
directly related
containing substance
intensity discharge
sulfur containing
various embodiments
discharge lamp
inner surface
inert gas
exterior surface
excitation signal
signal source
positioned near
inversely related
rf driven
selected spectrum
electrodes adjacent
driving electrodes
visible range
sulfur lamp
rf drive
driven sulfur
disclosed radiating
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