Determining the ENA Composition From TWINS Flight Data: A Data-Analysis Technique

Details Determining the ENA Composition From TWINS Flight Data: A Data-Analysis Technique Determining the ENA Composition From TWINS Flight Data: A Data-Analysis Technique

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agusmsm73a..03a&link_type=abstract

American Geophysical Union, Spring Meeting 2009, abstract #SM73A-03

Physics

2778 Ring Current, 2788 Magnetic Storms And Substorms (7954), 2794 Instruments And Techniques, 7837 Neutral Particles (2151), 7894 Instruments And Techniques

Scientific paper

We present a data-analysis technique that is able to estimate the mass composition of the TWINS (Two Wide- angle Imaging Neutral-atom Spectrometers) measured energetic neutral atom (ENA) data using the amplitudes of electron distributions derived from the micro-channel plates (MCP). These distributions are generated through the registration of secondary electrons emitted from a thin carbon foil as the TWINS instruments measure the time-of-flight of incoming ENAs. For a given particle time-of-flight (or ENA velocity), the secondary electron yield depends on ENA energy or mass. Utilizing the theory of multiple emissions of secondary electrons, we can fit the distributions from the flight data using a superposition of a standard number of peaks, each represented by a three-parameter Cauchy-Lorentzian function. Through this we estimate an effective secondary electron yield value through comparison to TWINS calibration data. From the number of valid events for a given set of data and its effective SE-yield value, we can extract the composition of the flight data for a selected velocity range based on the anticipated most abundant two-species of magnetospheric ENAs, i.e., hydrogen (H) and oxygen (O). We present the results of applying this technique to selected periods of TWINS flight data over the past year.

Affiliated with

Also associated with

No associations

Rating

Determining the ENA Composition From TWINS Flight Data: A Data-Analysis Technique does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Determining the ENA Composition From TWINS Flight Data: A Data-Analysis Technique, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Determining the ENA Composition From TWINS Flight Data: A Data-Analysis Technique will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1109258