X-ray Induced Electric Currents in Anodized TaO: Towards a Large-Area Thin-Film Sensor.

Purpose: We investigated the characteristics of radiation-induced current in nano-porous pellet and thin-film anodized tantalum exposed to kVp X-ray beams. We aim at developing a large area (≫cm) thin-film radiation sensor for medical, national security and space applications.

Methods: Large area (few cm) micro-thin Ta foils were anodized and coated with a counter electrode made of conductive polymer.

Self-powered nano-porous aerogel x-ray sensor employing fast electron current.

Purpose: We developed a new class of aerogel-based thin-film self-powered radiation sensors employing high-energy electron current (HEC) in periodic multilayer (high-Z | polyimide aerogel (PA) | low-Z) electrode microstructures.

Materials: Low-Z (Al) and high-Z (Ta) electrodes were deposited on 50 μm-thick PA films to obtain sensors with Al-PA-Ta-PA-Al structures. Sensors were tested with x rays in the 40-120 kVp range and with 2.