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Home All issues Volume 642 (October 2020) A&A, 642 (2020) A7 Full HTML

Table 2.

Summary of key EPD measurement capabilities.

Species Energy range # of FoVs FoV size per aperture Geom. factor (cm2 sr) Max. time resolution
STEP e−, ions 2–80 keV 1 (15 sectors) 28 ° ×54° 8 × 10−3(a) 1 s
EPT e−, H, He 25–475 keV (e−) 4 (sunward, anti-sunward, north, south) 30° 0.01 1 s
25 keV–6.4 MeV (H)
1.6–6.4 MeV n−1 (He)
SIS H, 3He, 4He, C, N, O, 14 keV/n–20.5 MeV n−1 2 (sunward, anti-sunward) 22° 0.2 (b) 3 s
Ne, Mg, Si, S, Ca, Fe
HET e−, H, 3He, 4He, C, 0.3–30 MeV (e−) 4 (sunward, anti-sunward, north, south) 43° 0.27 (c) 1 s
N, O, Ne, Mg, Si, 6.8–107 MeV (H)
S, Ar, Ca, Fe, Ni 8.1–41 MeV n−1 (3He)
6.9–105 MeV n−1 (4He)
12–236 MeV n−1 (C, N, O)
16–360 MeV n−1 (Ne–S)
20–500 MeV n−1 (Ar–Ni)

Notes.

(a)

Can be reduced to 1.7 × 10−4 cm2 sr during high-intensity periods.

(b)

Can be reduced in several steps to a minimum of 0.002 cm2 sr using a variable aperture in front of the entrance foil.

(c)

Can be reduced to 0.01 cm2 sr during high-intensity periods.

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