RADCAM-A radiation camera system combining foil bolometers, AXUV diodes, and filtered soft x-ray diodes

Area of Science:

• Plasma Physics and Fusion Energy Research
• Diagnostic Systems for Tokamak Reactors

Background:

• Accurate measurement of radiated power is crucial for optimizing tokamak performance.
• Existing diagnostic systems often lack sufficient spatial resolution and sensitivity.

Purpose of the Study:

• To introduce and characterize the RADCAM system for improved plasma radiation measurements.
• To demonstrate enhanced spatial resolution and stable sensitivity for tokamak diagnostics.

Main Methods:

• Construction and design overview of the RADCAM system, including foil bolometers and AXUV diodes.
• Implementation of anti-reflection carbon coatings on bolometer foils to improve sensitivity.
• Detailed calibration procedures and cross-calibration methodology between different detector types.

Main Results:

• RADCAM significantly increases spatial resolution compared to legacy systems.
• System sensitivity shows less than 5% variation over 1000 discharges, ensuring reliability.
• Cross-calibration enables high temporal resolution measurements of plasma radiation profiles.

Conclusions:

• The RADCAM system is a compact and versatile diagnostic tool for TCV.
• It provides high-resolution radiated power profiles, crucial for tokamak optimization.
• The system demonstrates robust performance and improved measurement capabilities.