Choi، نويسنده , , E. and Komori، نويسنده , , M. and Takahisa، نويسنده , , K. and Kudomi، نويسنده , , N. and Kume، نويسنده , , K. and Hayashi، نويسنده , , K. and Yoshida، نويسنده , , S. and Ohsumi، نويسنده , , H. and Ejiri، نويسنده , , H. and Kishimoto، نويسنده , , T. and Matsuoka، نويسنده , , K. and Tasaka، نويسنده , , S.، نويسنده ,
The radon emanation rates for materials were measured by using the electrostatic precipitation method as a radon monitor. It was found that a low level of radon was emanated from several material components in ELEGANT V. The radon monitor has been developed for the highly sensitive measurements of low-level radon concentration. The system was shown to have a sensitivity to radon concentrations as low as 1.6 mBq/m3 for one day measurement. The system was also used as the radon concentration monitor for the gas inside the airtight box of the ELEGANT V at Oto Cosmo Observatory.