USMP-4 Closes With A Bit Of Astrophysics - Mission Prepares To Return Home

December 03, 1997

Scientists are doing a little bit of astrophysics research as activities aboard the fourth U.S. Microgravity Payload (USMP-4) wind down in preparation for Friday morning's landing.

Astrophysics is not really a part of the bill for the mission, but it's an important part of ensuring that data are interpreted for the Confined Helium Experiment, said Peter Curreri, the mission scientist here at NASA's Marshall Space Flight Center.

CHeX used a dewar full of liquid helium to measure the finite size effect where materials behave as if they are two-dimensional. The sensitivity of the experiment is so great that even cosmic rays can add heat and disrupt the activities.

The liquid helium ran out of CHeX at 12 days, three hours mission elapsed time, which was just about when engineers predicted it would be depleted. However, scientists have left the instruments on to measure cosmic ray and background radiation effects. One area of special concern is the South Atlantic Anomaly where the Van Allen radiation belts dip closer to Earth.

The radiation measurements will be used in figuring out how much background heating noise should be subtracted when the CHeX data are analyzed. The data will also be useful for other missions that have electronics that might be affected by the South Atlantic Anomaly or by cosmic rays, Curreri said.

Only one other USMP-4 experiment, the Isothermal Dendritic Growth Experiment (IDGE), remains active, Curreri said. IDGE, and the Space Acceleration Monitoring System, will run through late Thursday when the USMP-4 is shut down in preparation for landing.

The MEPHISTO furnace shut down early Wednesday when it finished processing its samples. The Advanced Automated Directional Solidification Furnace (AADSF) was shut down early Tuesday when its last sample cartridge apparently broke, leaking vapor into the furnace proper which destroyed the thermocouples.

IDGE, CHeX, MEPHISTO, and AADSF all are mounted in the payload bay on a special multipurpose carrier.

Inside the shuttle, the three middeck glovebox experiments - Enclosed Laminar Flames, Particle Engulfing and Pushing, and Wetting Characteristics of Immiscibles - completed all of their planned runs, too.

"The glovebox investigators had just great results," Curreri said. This included having the crew revise procedures with the scientists when experiments ran differently than expected.

The science teams are writing their end-of-mission summaries, and a final science press conference will be held Thursday morning. We will publish the final science story Thursday afternoon.
-end-


NASA/Marshall Space Flight Center--Space Sciences Laboratory

Related Cosmic Rays Articles from Brightsurf:

Cosmic X-rays reveal an indubitable signature of black holes
A black hole is an exotic cosmic object, from within which nothing, not even light, can escape.

Cosmic rays may soon stymie quantum computing
Infinitesimally low levels of radiation, such as from incoming cosmic rays, may soon stymie progress in quantum computing.

Using lung X-rays to diagnose COVID-19
This system uses deep learning to train a neural network model that can distinguish between healthy patients, pneumonia patients and COVID-19 patients.

How cosmic rays may have shaped life
Physicists propose that the influence of cosmic rays on early life may explain nature's preference for a uniform 'handedness' among biology's critical molecules.

Galactic cosmic rays now available for study on Earth, thanks to NASA
To better understand and mitigate the health risks faced by astronauts from exposure to space radiation, we ideally need to be able to test the effects of galactic cosmic rays (GCRs) here on Earth under laboratory conditions.

Not just for bones! X-rays can now tell us about soft tissues too
A new X-ray imaging technique could identify lesions and tumors before ultrasound or MRI can.

Galactic cosmic rays affect Titan's atmosphere
Planetary scientists using the Atacama Large Millimeter/submillimeter Array (ALMA) revealed the secrets of the atmosphere of Titan, the largest moon of Saturn.

Invisible X-rays turn blue
A new reaction system can detect X-rays at the highest sensitivity ever recorded by using organic molecules.

Chest X-rays contain information that can be harvested with AI
The most frequently performed imaging exam in medicine, the chest X-ray, holds 'hidden' prognostic information that can be harvested with artificial intelligence (AI).

X and gamma rays --Even more powerful
International group of researchers including scientists from Skoltech have invented a new method for the generation of intense X and gamma-ray radiation based on Nonlinear Compton Scattering.

Read More: Cosmic Rays News and Cosmic Rays Current Events
Brightsurf.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.