| Title |
A CCD Camera Lens Degradation Caused by High Dose-Rate Gamma Irradiation |
| Authors |
조재완(Cho, Jai-Wan) ; 이준구(Lee, Joon-Koo) ; 허섭(Hur, Seop) ; 구인수(Koo, In-Soo) ; 홍석붕(Hong, Seok-Boong) |
| Keywords |
IPTV ; CCD Imaging Sensor ; Gamma Ray ; Color Center ; Radiation ; Color Component Analysis |
| Abstract |
Assumed that an IPTV camera system is to be used as an ad-hoc sensor for the surveillance and diagnostics of safety-critical equipments installed in the in-containment building of the nuclear power plant, an major problem is the presence of high dose-rate gamma irradiation fields inside the one. In order to uses an IPTV camera in such intense gamma radiation environment of the in-containment building, the radiation-weakened devices including a CCD imaging sensor, FPGA, ASIC and microprocessors are to be properly shielded from high dose-rate gamma radiation using the high-density material, lead or tungsten. But the passive elements such as mirror, lens and window, which are placed in the optical path of the CCD imaging sensor, are exposed to a high dose-rate gamma ray source directly. So, the gamma-ray irradiation characteristics of the passive elements, is needed to test. A CCD camera lens, made of glass material, have been gamma irradiated at the dose rate of 4.2 kGy/h during an hour up to a total dose of 4 kGy. The radiation induced color-center in the glass lens is observed. The degradation performance of the gamma irradiated lens is explained using an color component analysis. |