First Year of BEAM Demo Offers Valuable Data on Expandable Habitats

Astronauts aboard the space station 3-D printed a shield to cover one of the two Radiation Environment Monitors inside the BEAM. The shield, the white hemispherical shape at the center of the photograph, is shown above inside the BEAM module. In the coming months, the crew will print successively thicker shields to determine the shielding effectiveness at blocking radiation. (Credit: NASA)

HAMPTON, Va. (NASA PR) — Halfway into its planned two-year demonstration attached to the International Space Station, the Bigelow Expandable Activity Module, or BEAM, is showing that soft materials can perform as well as rigid materials for habitation volumes in space. The BEAM was launched and attached to station through a partnership between NASA’s Advanced Exploration Systems Division (AES) and Bigelow Aerospace, headquartered in North Las Vegas, Nevada.

NASA and Bigelow are primarily evaluating characteristics directly related to the module’s ability to protect humans from the harsh space environment. Astronauts aboard station work with researchers on the ground to monitor the module’s structural integrity, thermal stability, and resistance to space debris, radiation, and microbial growth.

Researchers at NASA’s Langley Research Center in Hampton, Virginia, continually analyze data from internal sensors designed to monitor and locate external impacts by orbital debris, and, as expected, have recorded a few probable micrometeoroid debris impacts so far. BEAM has performed as designed in preventing debris penetration with multiple outer protective layers exceeding space station shielding requirements.

Over the next several months, NASA and Bigelow will focus on measuring radiation dosage inside the BEAM. Using two active Radiation Environment Monitors (REM) inside the module, researchers at NASA’s Johnson Space Center in Houston are able to take real-time measurements of radiation levels. They have found that Galactic Cosmic Radiation (GCR) dose rates inside the BEAM are similar to other space station modules, and continue to analyze contributions to the daily dose from the Earth’s trapped radiation belts to better understand the shielding properties of the module for application to long-term missions. The space station and the BEAM enjoy a significant amount of protection from Earth’s magnetosphere. Future deep space missions will be far more exposed to energized radiation particles speeding through the solar system, so NASA is actively working on ways to mitigate the effects of radiation events.

In late April, NASA’s radiation researchers at Johnson began a multi-month BEAM radiation experiment by installing a .04 inch (1.1 mm) thick shield onto one of the two REM sensors in BEAM. The station crew produced a hemispherical shield using the 3-D printer on the space station, and in the next few months this first shield will be replaced by two successively thicker shields, also 3-D printed, with thicknesses of about .13 inches (3.3mm) and .4 inches (10mm), respectively. The difference in measurements from the two REMs—one with a shield and one without—will help better resolve the energy spectra of the trapped radiation particles, particularly those coming from the South Atlantic Anomaly.

Space station crew members have entered the BEAM nine times since its expansion in May 2016. In addition to the REM shielding experiment activities, the crew has swapped out passive radiation badges called Radiation Area Monitors and they routinely collect microbial air and surface samples. These badges and samples are sent back to Earth for standard microbial and radiation analysis at Johnson.

The BEAM technology demonstration is helping NASA to advance and learn about expandable space habitat technology in low-Earth orbit for application toward future human exploration missions. The partnership between NASA and Bigelow supports NASA’s objective to develop a deep space habitat for human missions beyond Earth orbit while fostering commercial capabilities for non-government applications.


  • I’m going to say it, that radiation “shield” is just a ping pong ball!

    I do think BEAM and Bigelow are doing great work though.

  • JamesG

    Are you referring to the little ping pong ball or the big one? ;0

  • Jacob Samorodin

    Agreed. I like the fact that Bigelow corporation has gone from paper & digital design to an actual habitable structure in space…But why couldn’t Bigelow & Musk see eye-to-eye on joining forces? Bigelow would provide the hab, Musk should have provided the booster, etc.

  • JamesG

    Bigalow has has habitable (by cockroaches) structures in space for a decade.

    Musk isn’t in the space station business. He is in the payload launch business. Bigelow Aerospace is a potential customer of his, not a partner.

  • Mr Snarky Answer

    Maybe he had some help from ET?

  • Kapitalist

    Indeed, the very word “station” is contrary to SpaceX’s objectives. SpaceX is a new shipping business. The three rules of shipping are: Relocation, relocation, relocation.

  • windbourne

    musk does not care if he goes to the station(s) or luna. To him and SpaceX, they are just cargo and he will happily fly them.
    He just will not fund them.

  • savuporo

    They never did the same experiments on Zarya..

  • Robert G. Oler

    it is time to ditch the space station as a microgravity hub and reorient it as a technology/spacecraft services group with a microgravity co flyer.

  • mattmcc80

    The missing component is the crew capsule. SpaceX would be happy to fly Bigelow’s habitats. But there’s no point in doing it until there’s a way to get crew to them. Bigelow at one point had agreements with both SpaceX and Boeing in place, they just need to finish their spacecraft.

  • publiusr

    A year already? Wow,