||Local Water Shielding to Space Radiation with the Protective Curtain in ISS Crew Cabin
Kodaira, Satoshi ,
KItamura, HisashiUchihori, Yukio
The ISS Service Module crew cabins are known to be less shielded fron space radiation as compared with the neighboring compartments. The outer wall of the cabin is only 1.5g/cm2 aluminum shielding. To increase the crew cabin shielding a special protective cuetain was designed and then delivered to ISS in 2010. The hygienic wipes and towels containing water are stored in the protective curtain in 4 layers thus producing an additional shielding thickness of about 6g/cm2 water-equivalent matter. Total mass of the curtain with wipes and towels is 65kg. The protective curtain was installed along the outer wall of the starboard crew cabin. To study the radiation chielding effect 12 passive detector packages with thermoluminescent detectors(TLD) and solid state track detectors(SSTD) are used. 6 packages are installed on the protective curtain surface and the other 6 packages are installed directly on the crew cabin wall behind or aside the curtain. The passive detector packages have been exposed in the Service Module starboard crew cabin during 5 sessions from 2010to 2014. The radiation shielding effect of the protective curtain is from 20 to 60% for absorbed dose. In this experiment, water.shielding proved to be more effective than aluminum. It was demonstrated that additional local shielding if properly mounted can effectively mitigate the radiation dose in space station compartments.
Space Radiation and Heavy Ions in Therapy Symposium 2015(SRHITS2015)