In-Situ
Atom
and
Molecule Absorption Measuring Systems
Measures
atomic
or
molecular density by resonance absorption.
Species
is
determined
by the type of lamp and detector used.
Species
include
atomic
Oxygen, Nitrogen, Chlorine, and Hydrogen as well as
molecular OH, NO and CO.
Typical
detection
limits
are:
- 10^9 atoms per cubic
centimeter for a 10 centimeter path (detection limit goes down in
proportion to path increase). This detection limit corresponds to
approximately 100 parts per trillion of a standard atmosphere.
- 10^12 molecules per
cubic centimeter for a 10 centimeter path (detection limit goes down in
proportion to path increase). This detection limit corresponds to
approximately 100 parts per billion of a standard atmosphere.
A
typical
dynamic
range is 10^4 for a given path. This range can be
extended by adjusting the path.
System
is
"plug
and run" and includes everything required to make measurements.
System includes:
- Atomic or Molecular
spectral emission lamp which includes an integral shielded RF power
supply and vacuum coupling
- Photodiode including
integral shielded preamp and vacuum coupling
- Conflat Mounting flanges and
adapters to lamp and detector assemblies
- Control electronics
module which includes:
- Power supplies for lamp
and detector
- Microcomputer controlled
phase sensitive detector
- Serial interface to
notebook or desktop PC
- Software for acquiring
and displaying real time atomic or molecular density data on a PC
In-Situ
Atom
and
Molecule Fluorescence Measuring Systems
Measures
atomic
or
molecular density by resonance fluorescence that is the same
technique used by Resonance to measure atomic oxygen in the
thermosphere. (WINDO)
Species
is
determined
by the type of lamp and detector used.
Species
include
atomic
Oxygen, Nitrogen, Chlorine, and Hydrogen as well as
molecular OH, NO and CO.
Typical
detection
limits
are:
- 10^6 atoms per cubic
centimeter. This detection limit corresponds to approximately 0.1 parts
per trillion of a standard atmosphere.
- 10^9 molecules per cubic
centimeter for a 10 centimeter path (detection limit goes down in
proportion to path increase). This detection limit corresponds to
approximately 1 part per billion of a standard atmosphere.
A
typical
dynamic
range is 10^4.
System
is
"plug
and run" and includes everything required to make measurements.
System includes:
- Atomic or Molecular
spectral emission lamp which includes an integral shielded RF power
supply and vacuum coupling
- Photomultiplier
including integral shielded preamp and vacuum coupling
- Conflat Mounting flanges and
adapters to lamp and detector assemblies
- Control electronics
module which includes:
- Power supplies for lamp
and detector
- Microcomputer controlled
pulse counting phase sensitive detector
- Serial interface to
notebook or desktop PC
- Software for acquiring
and displaying real time atomic or molecular density data on a PC
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