spacetoday.net: space news from around the webin association with SpaceNews


ISS radiation shielding not as good as hoped
Posted: Thu, Oct 24, 2002, 9:04 AM ET (1304 GMT)
ISS illustration (NASA) Upgraded radiation shielding on the International Space Station is not working as well as expected, New Scientist reported Wednesday. According to the report, radiation levels within the station are about one millisievert per day, about the same amount of radiation one would get on the ground from natural sources in one year. Those levels are within a few percent of those measured on Mir despite the use of new shielding on the station designed to lower radiation levels. The primary source of the radiation is the collision of cosmic rays with aluminum atoms in the hull, creating a shower of particles. The new shielding uses polyethylene, whose lighter atomic nuclei were designed to reduce the amount of secondary particles released in collisions. Experts told New Scientist that a whole new type of shielding may be required for future missions beyond the Earth's protective magnetosphere, which shields the ISS of high-speed particles from the Sun.
Related Links:
<<previous article   next article>>
news in brief
Weather scrubs Demo-2 launch attempt
Posted: Thu, May 28 6:26 PM ET (2226 GMT)

First LauncherOne mission fails to reach orbit
Posted: Thu, May 28 6:24 PM ET (2224 GMT)

Soyuz launches missile early warning satellite
Posted: Sun, May 24 10:55 AM ET (1455 GMT)

news links
Friday, May 29
Space Force's Newest Ad Asks What's Ahead for Humanity
Military.com — 6:21 am ET (1021 GMT)
What’s a Space Weapon? The Answer Can Be Complicated.
Air Force Magazine — 6:20 am ET (1020 GMT)
No stopping Rocket Lab in new alert level
Gisbourne (NZ) Herald — 6:19 am ET (1019 GMT)


about spacetoday.net   ·   info@spacetoday.net   ·   mailing list