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
Photovoltaic system with integrated photovoltaic panel and battery
Cylindrical LED fixture
Therapeutic human anti-IL-1R1 monoclonal antibody
Interposer having molded low CTE dielectric
All-in-one information handling system
Method and device for processing broadcast packets/multicast control messages
Control device for radiation imaging apparatus and control method therefor
  Randomly Featured Patents
Visual fishing aid
Liquid crystal display device and fabricating method and driving method thereof
Radio frequency data communications device with adjustable receiver sensitivity and method
Liquid level detector
Rotary valve for powdery and granular materials
Communication network interface with screeners for incoming messages
Methods and apparatus for CT system thermal control architecture
Capacitive accelerometer with hinges on top and bottom surface
Sheet containing a plurality of surgical needles
Devices to equip vehicles with close circuit television backup system