VIS-NIR reflectance spectra collected before and after electron irradiation (2keV, 3.4 × 10^16 e- cm^(−2)) of spherical salty ice particles (10-100 µm typical particle diameter) produced by freezing droplets of a solution of 5wt.% NaCl | BYPASS

Experiment

Title: VIS-NIR reflectance spectra collected before and after electron irradiation (2keV, 3.4 × 10^16 e- cm^(−2)) of spherical salty ice particles (10-100 µm typical particle diameter) produced by freezing droplets of a solution of 5wt.% NaCl

DOI

10.26302/SSHADE/EXPERIMENT_RO_20240701_000

Data reference

Ottersberg, Rafael (2024): VIS-NIR reflectance spectra collected before and after electron irradiation (2keV, 3.4 × 10^16 e- cm^(−2)) of spherical salty ice particles (10-100 µm typical particle diameter) produced by freezing droplets of a solution of 5wt.% NaCl. SSHADE/BYPASS (OSUG Data Center). Dataset/Spectral Data. https://doi.org/10.26302/SSHADE/EXPERIMENT_RO_20240701_000

Publications

Ottersberg et al., 2025, Icarus

Owner

Database(s)

BYPASS

Experimentalists

Rafael Ottersberg

Spectra preview

Experiment type

Type(s): laboratory measurement
Description: Spherical ice particles are produced by spraying droplets of salt solution (5 wt.% NaCl) into liquid nitrogen with the SPIPA-C setup. A centimeter-thick sample made of these particles is then introduced in the MEFISTO simulation chamber where it is irradiated with high-energy electrons: 2keV, 3.4 × 10^16 e- cm^(−2).
Number of spectra: 2

Variable parameters

Variable type(s)

irradiation dose

Location

Laboratory: Space Research & Planetary Sciences Division of the University of Bern (WP Unibe)

Instrument #1

Instrument: MoHIS - Hyperspectral imaging system Vis-NIR

Spectral parameters

Standard medium

vacuum

Observation mode

spectrum

Spectral range type(s)

Vis, NIR

Valid spectral range(s)

	Min - Max ( $nm$ )	Sampling ( $nm$ )	Resolution ( $nm$ )	Position accuracy ( $nm$ )	Absorption edge
#1	400.0 - 2000.0	5.0	5.4
#2	2000.0 - 2400.0	5.0	10.8

Angular parameters

Definition: incidence and emergence angles are positive with origin at nadir, and vary in same direction. Azimuth origin (increasing clockwise) is for i = e (opposition geometry).

Observation geometry: biconical
Observation mode: fixed angles
Incidence angle: 0.0°
Emergence angle: 5.0°
Azimuth angle: 0.0°
Phase angle: 5.0°

Spatial parameters

Observation mode: roi averaged

History

Date begin - end: 2024-07-01 - 2024-07-01

Versions

Release date: 2025-04-18 09:50:55+0000 UTC
Version (Date): #1 (2025-04-18 09:50:55+0000 UTC, Updated: 2025-04-18 09:50:55+0000 UTC)

Image

Comparison of the sample before (left) and after (right) irradiation in the red ROI. All reflectance spectra shown here are integrated over the ROI drawn in red over the sample.