"The portable camera, which will apply technology jointly developed with the Japan Aerospace Exploration Agency (JAXA), is designed to allow for more efficient clean-up of radioactive contamination, an issue of great concern in Japan because of the nuclear disaster last year. The camera will use technology now in place on observation equipment aboard the ASTRO-H X-ray astronomy satellite operated by JAXA.an armored seat that would reduce heavy equipment operators' exposure to radiation by half, and theoretically allow workers to remain twice as long in hazardous areas before receiving maximum permitted radiation doses:
Tadayuki Takahashi, a professor of space physics at JAXA and project manager of the ASTRO-X, said, "The camera can measure radiation in high places, such as on roofs, and will lead to more efficient decontamination of radiation." Using two types of semiconductor sensors, the direction and strength of gamma rays emitted by radioactive materials such as cesium are measured and brought to light as a superimposed image on the visible landscape."
The seat material, including body armor parts (shoulders, arms, chest/abdominal area, thighs, neck), consists mainly of tungsten sheet, which offers excellent radiation shielding capability. Although the seat weighs a considerable 130 kilograms (kg), individual parts weigh less than 20kg and most of their weight is integrally supported by the seat, so the burden on the operator is minimal.Here, Mitsubishi Heavy Industries demonstrates the Astrocam and explains its technology in this one-hour press conference video (in Japanese, no subtitles).
In addition, the operator can put on and remove the armor-like parts easily by opening/closing the front like a vest...these features provide a high rate of radiation shielding while simultaneously minimizing fatigue during continuous work and inconvenience to machine operation from wearing such shielding.
[Image of demonstration camera view courtesy of Asahi Shimbun Online] More on the Mitsubishi Astrocam 7000HS camera:
- Mitsubishi Heavy Machinery press release: Radiation-resistant armored seat
- Japan Times: "Mitsubishi Heavy develops camera for real-time visualization of radiation"
- eNikkei.com: "Mitsubishi Heavy's Camera Visualizes Radioactive Materials"
- Japan Daily Press: "Mitsubishi creates camera that can 'see' radiation, goes on sale in February"