Table I-1: Characteristics of typical radiation belt particles

 

Particle

 

1 MeV Electron

10 MeV Proton

Range in aluminium (mm)

2

0,4

Peak equatorial omni­directional flux (cm-2s-1)*

4 × 106

3,4 × 105

Radial location (L) of peak flux (Earth­radii)*

4,4

1,7

Radius of gyration (km)

 

 

                @ 500 km

                @ 20 000 km

0,6

10

50

880

Gyration period (s)

 

 

                @ 500 km

                @ 20 000 km

10-5

2 × 10-4

7 × 10-3

0,13

Bounce period (s)

 

 

                @ 500 km

                @ 20 000 km

0,1

0,3

0,65

1,7

Longitudinal drift period (min)

 

 

                @ 500 km

                @ 20 000 km

10

3,5

3

1,1

* derived from the models of clause 9.3.1