Solar wind helium isotopic composition from SWICS/ULYSSES

Details Solar wind helium isotopic composition from SWICS/ULYSSES Solar wind helium isotopic composition from SWICS/ULYSSES

Apr 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995ssrv...72...61b&link_type=abstract

Space Science Reviews, Volume 72, Issue 1-2, pp. 61-64

Computer Science

23

Scientific paper

This is the first study of the isotopic composition of solar wind helium with the SWICS time-of flight mass spectrometer. Although the design of SWICS is not optimized to measure3He abundances precisely,4He/3He flux ratios can be deduced from the data. The long term ratio is 2290±200, which agrees with the results obtained with the ICI magnetic mass spectrometer on ISEE-3 and with the Apollo SWC foil experiments. The ULYSSES spacecraft follows a trajectory which is ideal for the study of different solar wind types. During one year, from mid-1992 to mid-1993, it was in a range of heliographic latitudes where a recurrent fast stream from the southern polar coronal hole was observed every solar rotation. Solar wind bulk velocities ranged from 350 km/s to 950 km/s which would, in principle allow us to identify velocity-correlated compositional variations. Our investigation of solar wind helium, however, shows an isotopic ratio which does not depend on the solar wind speed.

Affiliated with

Also associated with

No associations

Rating

Solar wind helium isotopic composition from SWICS/ULYSSES 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 Solar wind helium isotopic composition from SWICS/ULYSSES, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Solar wind helium isotopic composition from SWICS/ULYSSES will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1694505