FluX is...2

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AbstractHelios 1 observed a magnetic cloud on the

spacecraft’s closest approach to the

Sun (0.3 AU) on March 26, 1976.

Fluxes of energetic particles

detected by the spacecraft

generally decrease during

the passage of a cloud,

but in this case the

smooth intensity

depression was

interrupted by

a sharp

peak

-like

increase

coinciding

with a deep drop

of the magnetic field

magnitude. This behavior

is observed for protons and

electrons in several energy bands.

A possible explanation of this event

is given by the spheroidal model of magnetic

clouds, applicable for the plasmoid geometry

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IndeX Terms:

2134 ... Interplanetary Physics:

Interplanetary

magnetic fields;

7519 SOlar Phy

sics, AstrOphy

sics,... and AstrOnOmy: Flares;

7524 SOlar Ph

ysics, AstrOph

ysics, and AstrOnOmy: Magn

etic fields.

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