All Sky Imaging System for Atmospheric Plasma Diagnostics
Abstract
A mobile optical observatory was established at the Plasma Science and Fusion Center on campus at MIT. It consists of an All Sky Imaging System (ASIS) and a pick-up truck with a camper-like-box. The major components of ASIS includes: (1) all-sky lenses with different fields of view (FoV) i.e., 24mm/F4.O fish-eye -180 deg. FoV, 45mm/F2.8 - 76 deg. FoV, and 210mm I F4.O - 19 deg. FoV, (2) narrow-band interference spectral filters, (3) 2- and 3-log neutral density filters, (4) image intensifier unit, (5) cooled CCD camera, and (6) data acquisition and remote controlling systems. ASIS is a powerful instruments for atmospheric plasma diagnostics. For example, in radio wave injection and chemical release experiments, rich information can be deduced from the measured airglow. The images of highly structured plasma clouds in chemical release experiments will help identify the source mechanisms, producing plasma density irregularities. Measured intensity of airglow emissions (at 630.0 nm) in radio wave injection experiments will show plasma density depletion. Emissions may also be based on estimating the fluxes of generated energetic particles (at 427.8 rim in E region and at 630.0 rim in F region), neutral wind (at 557.7 rim), and plasma drifts (at 777.4 rim).
Document Details
- Document Type
- Technical Report
- Publication Date
- May 16, 2004
- Accession Number
- ADA424134
Entities
People
- Min-chang Lee
Organizations
- Massachusetts Institute of Technology