Instrument Specifications
SWIS Specifications
Sr. No. | Parameter | Specification |
---|---|---|
Sensor units (Top hat analyzers, THA) | Two (THA-1: FOV in the ecliptic plane and with MMA, THA-2: FOV in the plane perpendicular to ecliptic without MMA) | |
Energy range | 100 eV to 20 keV | |
Energy Resolution | 10% for both THA-1 and THA-2 | |
Instrumental factor | 18 for both THA-1 and THA-2 | |
FOV | 2π for both the sensors in the azimuth and 3 degree in elevation | |
Detector | 80 mm Chevron MCP with position sensitive anode (RAE) for both sensors | |
Magnets | 16 m-Co magnets in THA-1. |
STEPS Specifications
Sr.No. | Parameter | Specification |
---|---|---|
Energy range | 20 keV/n – 5 MeV/n | |
Total detector units | Six
3 units for species separated spectra 3 units for integrated species spectra |
|
No. of detectors | 3 detectors for species separated spectra
1 detector for species integrated spectra |
|
Detector type | Dual window Si-PIN detector
Single window Si-PIN detector BC408 Scintillator Silicon Photomultiplier (SiPM) |
|
Integration time | 1 second nominal | |
Data rate | 11 kB/s (1s integration), ~1GB per Earth day | |
Magnetic leakage | 100 nT at a distance of ~700 mm from STEPS (side walls) | |
Field of view | SR (sun-radial) Unit: FoV: ±10.5∘, GF: 0.04 PS (Parker spiral) Unit: FoV: ±15∘, GF: 0.08 IM (intermediate between SR and PS) Unit: FoV: ±7.5∘, GF: 0.02 NP (North-pointing) Unit: FoV: ±14∘, GF: 0.09 EP (Earth-pointing) Unit: FoV: ±8.5∘, GF: 0.12 SP (South-pointing) Unit: FoV: ±14∘, GF: 0.09 |
|
Quantization | 8 bits 7 bits (20 keV to 2 MeV) 7 bits (2 MeV to 20 MeV) |
|
Spectral measurement rate | Full spectrum every second | |
Energy threshold | Commandable through FPGA | |
No. of packages | 4; STEPS-1, STEPS-2A, STEPS-2B, ASPEX-PE |