CEM's Role in the Discovery of Dark Energy
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CEM’s EV group has teamed with the University of Texas McDonald Observatory group to uncover the mysteries of Dark Energy.
Dark Energy:
In 1998 astrophysicists came to the conclusion the cosmic expansion of the universe was accelerating. This opposed previous theories that the cosmic expansion was slowing due to the influence of gravity. To account for the accelerating cosmic expansion astrophysicists have estimated that 70% of the mass-energy content of the universe must be composed of a gravitationally repulsive component that has been given the name “Dark Energy”. |
To help define the evolution and significant properties of dark energy, the Hobby Eberly telescope (HET) at the McDonald Observatory was chosen to survey and map the locations of other galaxies in space. The experiment, which is estimated to be completed over 100 nights of viewing, is now referred to as the Hobby Eberly Telescope – Dark Energy Experiment (HETDEX). http://www.as.utexas.edu/hetdex/
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CEM’s Role:
In order for the HET to successfully complete the dark energy experiment, it must undergo a significant upgrade. CEM has been awarded the design of a new tracker system. The tracker system will make high precision movements using a CEM designed tracker control system and mechanical design to carry heavy instruments 60 feet above a system of fragile mirrors.
Tracker Performance
| Tracker System and Payload Mass (Tons) |
12 |
X / Y travel (mm) |
3,900 |
| X / Y Speed , Max (mm/s) |
80 |
| X / Y Accuracy (mm) |
0.005 |
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For further information, please contact Dr. Joe Beno 512-232-1619 or Mr. Richard Hayes 512-232-1618
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