Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Characterization of individual particle atomic composition by aerosol mass spectrometry










Image Number 6 for United States Patent #6784423.

A method for determining the shape and size of particles and their constituent elements is disclosed. Particle ions are accelerated through a mass spectrometer useful in identifying the source particle of the resulting ions. By measuring the time-varying intensity of the identified ions as they strike a detector, a plot of the intensity of the ions over time is obtained for each ionized particle. The size of each ionized particle is determined by measuring a time span corresponding to the width of the peak of this plot. If the detector is a phosphor detector, the shape of the particle may be determined by using a high-speed camera to capture cross-section images of the ion-induced light pattern at closely-spaced successive moments in time. Alternatively, the intensity of ions striking the detector along at least one lateral dimension may be detected. By combining the multiple cross section images or the multiple lateral direction intensity profiles that are thus captured, an actual image of the shape of the original particle can be obtained.








 
 
  Recently Added Patents
Power saving methods for wireless systems
Image reading apparatus
Air driven alternators for battery powered vehicles
Method and apparatus for providing charging status information to subscriber of communication service
End to end email monitor
State detection device, electronic apparatus, measurement system and program
Method and system for modifying satellite radio program subscriptions in a mobile vehicle
  Randomly Featured Patents
Embedded software negotiation of PCM companding format
Method of measuring the concentration of gas in the presence of liquid particles
Tubless washing machine
Wire connecting apparatus and terminal therefor
Image search system, image search method, and storage medium
Flat covered leadless pressure sensor assemblies suitable for operation in extreme environments
Workpiece regrasping system for robot
Tricyclo[6.4.0.0.sup.2,7 ]-dodecane-1,8,2,7-tetracarboxylic acid dianhydride and polyimides therefrom
Loop filter architecture
Method and apparatus for recovering NRZ information from MFM data