The Development and Implementation of an Infrared Video Bolometer for the Edge Region of Wendelstein 7-X

Direct measurements of the radiated power in the island divertor domain are key to understanding stable detachment and its link to plasma confinement in Wendelstein 7-X (W7-X). The Infrared Video Bolometer (IRVB) is an instrument used to measure radiation in plasmas, and has been successfully implemented at W7-X following the setups at LHD, JT-60U, and KSTAR. The commissioning and full application of this system will commence in the upcoming experimental campaign. This poster describes the development and set-up of the IRVB diagnostic observing the plasma edge region for W7-X. The system itself is described and compared to the traditional setup using resistive foil based detectors. Benefits of the IRVB, such as its high spatial resolution, are introduced. Spatial distortions affecting average temperature measurements in the setup at W7-X were evaluated, and a 2-D field of view was determined. With collected in-situ data, calibration was completed for increased temperature data reliability. These are the first steps to fully incorporate this new diagnostic.