Interpretation of Recent Data from the Voyager 1 Plasma Instrument

Details Interpretation of Recent Data from the Voyager 1 Plasma Instrument Interpretation of Recent Data from the Voyager 1 Plasma Instrument

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agusmsh41a..19a&link_type=abstract

American Geophysical Union, Spring Meeting 2004, abstract #SH41A-19

Physics

2124 Heliopause And Solar Wind Termination, 2164 Solar Wind Plasma, 7807 Charged Particle Motion And Acceleration, 7851 Shock Waves

Scientific paper

Voyager 1 (V1) was launched in September 1978 and the onboard M.I.T. Plasma (PLS) instrument returned a wealth of information, most notably for the plasma environments around Jupiter and Saturn. Shortly after the Saturn encounter in 1980 the V1 PLS instrument failed. Despite this failure the instrument was still able to make limited "DC" measurements of integral current and DC data was collected from 1981 to 1985. Until recently, the V1 PLS instrument was turned off for power sharing reasons. Given the controversial evidence that V1 crossed the termination shock around August 2002, the V1 PLS instrument was reactivated in May of 2003. A second similar event/crossing began at V1 in mid 2003 and recent data from the V1 Cosmic Ray Subsystem (CRS) instrument show fluxes as high as those observed for the 2002 event. In this paper we attempt to calculate likely electron/ion fluxes seen by the V1 PLS instrument during the most recent 2003 event. We also present estimates of the present capabilities of the V1 PLS instrument. These calculations and estimates are compared alongside recent data taken from the V1 instrument. We also present recent V2 observations and discuss their implications for plasma conditions at V1 during the recent energetic particle events.

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