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Table 1 Summary of the LEPe instrument specifications

From: Low-energy particle experiments–electron analyzer (LEPe) onboard the Arase spacecraft

Parameter

 

Unit

Remark

Dimension

\(180.0\hbox {DIA} \times 204.5\hbox {H}\)

mm

Upper cylinder part

\(193.\hbox {0D} \times 131.0\hbox {W }\times 64.0\hbox {H}\)

mm

Lower box part

Mass

5.512

Kg

 

Power consumption

8.8

W

44 V, 0.20 A, incl. PSU’s efficiency

Raw data production

24.6

kbyte/spin

Science data, w/o compression

G-factor

  

Incl. mesh transmission

\(9.34\times 10^{-4}\)

\(\hbox {cm}^2\) sr keV/keV

Coarse ch, averaged

\(2.15\times 10^{-4}\)

\(\hbox {cm}^2\) sr keV/keV

Fine ch, averaged

Energy range

 19–19,000

eV

At 4 kV HV

Energy step

32

steps

 

Energy resolution

9.2

%

FWHM

Field of views

\(2.98\,\times \sim 270\)

deg

 

Angular resolution

  

\(\hbox {EL}\times \hbox {AZ}\), FWHM

\(2.89 \times 21.5\)

deg

Coarse ch, averaged

\(3.05 \times 4.71\)

deg

Fine ch, averaged