Bronze level automatically awarded US beta

This data has achieved Bronze level on 25 October 2015 which means this data makes a great start at the basics of publishing open data.

Solar Coronagraph Optical Test Chamber (SCOTCH)

Description

FUNCTION: Provides a facility for the assembly, test, and vacuum optical characterization of solar and coronal satellite instrumentation under ultraclean conditions. DESCRIPTION: The large SCOTCH is the primary test chamber located within a 400 ft2 Class 10 clean room. This completely dry-pumped, 550 ft3 vacuum chamber is maintained at synchrotron levels of cleanliness. Solar instrumentation up to 1 m in diameter and 5 m in length can be physically accommodated in the chamber. An instrument’s optical performance is probed and calibrated with a variety of visible and extreme-ultraviolet (XUV) sources mounted on the chamber’s 11-m beamline. The instrument is mounted on a precision pointing table equipped with motorized slides, which allows controlled adjustment of instrument pointing with subarc-second precision under evacuated conditions. The main beamline is baffled to eliminate stray reflections from the beamline walls and minimize the effect of light scattered off the instrument surfaces. A solar disk stray light rejection of 10–12 was successfully measured in the Large Angle Spectrometric Coronagraph (LASCO) C3 channel. INSTRUMENTATION: The SCOTCH is instrumented with temperature-controlled quartz crystal monitors and residual gas analyzers for real-time, quantitative measurements of volatile contamination. Various light sources can be introduced at one end of the 11-m chamber. This includes a solar spectrum simulator as well as other visible and XUV sources. The chamber contains an instrument-pointing table capable of supporting payloads with a mass of 75 kg. The precision of the pointing table is less than 1 arc second.

General Information

Legal Information

This dataset has been created by US Government which means it is required to be in the public domain. However US copyright law only allows open access by US citizens, we have assumed the data is equivalently licensed as CC0 for the rest of the world as this is in the spirit of the US Government’s Open Data policy.

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