Microgravity Research Opportunities for the 1990s (1995) / Chapter Skim
Currently Skimming:
Microgravity Research Opportunities for the 1990s: Chapter 7
Microgravity Research Opportunities for the 1990s: Chapter 7
Pages 120-127
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 120... ...
Nevertheless, there are a number of problems of interest in which access to space and the microgravity environment may allow important research advances. REPORT MENU NOTICE The subject of microgravity physics consists of many diverse topics united MEMBERSHIP by their common requirement for free-fall conditions.
|
From page 121... ...
Fluids under microgravity conditions constitute an extensive subject that is discussed separately in this report. THE CURRENT MICROGRAVITY PHYSICS PROGRAM Two extensive reviews of the field of fundamental science in space2,3 discuss in considerable depth experiments currently being developed for flight in the near future and longer-term prospects for the field.
|
From page 122... ...
Given a successful shuttle flight, there would be a strong motivation to fly this experiment on an independent satellite where the microgravity environment could be substantially improved and the full promise of this experiment might be realized. A second experiment developed by the Stanford group is the very ambitious attempt to observe the "frame-dragging" or magnetogravitational effects predicted by Einstein's general theory of relativity.
|
From page 123... ...
Liquid helium offers a number of properties that make it an almost ideal subject for such studies.7,8 It is an exceptionally pure system. In the superfluid state, helium possesses a very rapid relaxation time, and compared to the liquid vapor transition the superfluid transition is relatively insensitive to gravitational effects.
|
From page 124... ...
This is due to the advanced level of experimental and theoretical sophistication achieved in this area of condensed matter physics as a consequence of the vigorous progress of the last two decades. It is expected that the future will see continued experimental advances from the marriage of modern high-resolution measurement techniques with the vastly improved sample uniformity possible under microgravity conditions.
|
From page 125... ...
This type of experiment is a clear candidate for the microgravity environment, where the experimental observation time could be greatly extended with a further major increase in clock accuracy. The dynamics of crystal growth is another subject that can profit from microgravity conditions.
|
From page 126... ...
On both the space shuttle and the space station only a few experiments will be located close enough to the center of mass to ensure acceleration below the 10-6 level. It can be expected that a number of scientifically meritorious projects, such as the equivalence principle experiment and GPB, will require spaceflight independent of the crewed space facilities.
|
From page 127... ...
1986. Opportunities for Academic Research in a Low-Gravity Environment.
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.