X-Ray/Gamma Ray Detectors
type: Concept

BCS
type: Concept
definition: The Bragg Crystal Spectrometer (BCS) is designed to study plasma heating and dynamics during the impulsive phase of solar flares. It consists of two bent crystal spectrometers, BCS-A and BCS-B, that observe the H-like line complex of Fe XXVI, and He-like complexes of Fe XXV, Ca XIX and S XV. Each spectrometer consists of a double detector placed behind a pair of germanium crystals that diffract the incoming X-rays into the detectors. The two structures are mounted at the front of the Yohkoh spacecraft, on either side of the central panel, with a thermal filter mounted in front of each spectrometer. The crystal dispersion axes are oriented north-south. Additional information available at "http://umbra.nascom.nasa.gov/yohkoh/docs/yag/iguide/node3.html" [Summary provided by NASA]
in scheme: instruments