Space environment simulation and sensor calibration facility

Abstract

The Mumbo space environment simulation chamber discussed here comprises a set of tools to calibrate a variety of low flux, low energy electron and ion detectors used in satellite-mounted particle sensors. The chamber features electron and ion beam sources, a Lyman-alpha ultraviolet lamp, a gimbal table sensor mounting system, cryogenic sample mount and chamber shroud, and beam characterization hardware and software. The design of the electron and ion sources presented here offers a number of unique capabilities for space weather sensor calibration. Both sources create particle beams with narrow, well-characterized energetic and angular distributions with beam diameters that are larger than most space sensor apertures. The electron and ion sources can produce consistently low fluxes that are representative of quiescent space conditions. The particle beams are characterized by 2D beam mapping with several co-located pinhole aperture electron multipliers to capture relative variation in beam intensity and a large aperture Faraday cup to measure absolute current density.

Wound Healing Effects of Dracontomelon dao on Bacterial Infection Wounds in Rats and Its Potential Mechanisms under Simulated Space Environment

“…Under microgravity conditions, the e cacy of antibiotics decreases and the mutation rate of microorganisms increases signi cantly [2,3]. Assuming that there is no obvious microbial contamination in the structure of the spacecraft or its air, food, and water supply, any infection of the crew members will be caused by endogenous human and animal ora carried at the time of departure, which may limit the types of infection encountered in a predictable manner [4,5]. It is reported that the micro ora of bacteria was found after a short ight, which may be related to diet, mainly intestinal micro ora, such as Escherichia coli (E. coli) [6,7].…”