SLAC Today is available online at:
http://today.slac.stanford.edu
In this issue:
The LSST Gets Twelve Thumbs Up
Safety Today: Fire Marshal Robert Reek to Retire
Albert Fert and Peter Grünberg Awarded 2007 Physics Nobel
Word of the Week: Scintillation
Tuesday - October 9, 2007 |
The LSST Gets Twelve Thumbs UpThe Large Synoptic Survey Telescope (LSST) has passed an important milestone on the way to becoming reality. An NSF Conceptual Design Review of LSST progress—the first of three such reviews—occurred in September in Tucson, Arizona. Eighty members of the LSST Collaboration participated in the review. Observers from the National Science Foundation (NSF), the Department of Energy (DOE) and the European Southern Observatory, along with potential collaborators from Germany and France, were present. The 12 NSF reviewers were "very impressed," according to SLAC physics professor Rafe Schindler, who is part of the SLAC team designing the camera for the telescope and recommended the second NSF or Preliminary Design Review be conducted within 10 to 12 months. The LSST is designed to scan the skies of the Southern hemisphere repeatedly over a period of 10 years, looking for evidence of dark matter and dark energy, as well as mapping nearby asteroids and observing supernovae and other transient phenomena. If the project goes forward as planned, the 3.2 billion pixel camera used by LSST—by far, the largest digital camera ever made—will be assembled and tested at SLAC before being shipped to the telescope site in Chile. Read more... |
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Fire Marshal
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Albert Fert and Peter Grünberg Awarded 2007 Physics NobelThis year's physics prize is awarded for the technology that is used to read data on hard disks. It is thanks to this technology that it has been possible to miniaturize hard disks so radically in recent years. Sensitive read-out heads are needed to be able to read data from the compact hard disks used in laptops and some music players, for instance. In 1988 the Frenchman Albert Fert and the German Peter Grünberg each independently discovered a totally new physical effect—Giant Magnetoresistance (GMR). Very weak magnetic changes give rise to major differences in electrical resistance in a GMR system. A system of this kind is the perfect tool for reading data from hard disks when information registered magnetically has to be converted to electric current. Soon researchers and engineers began work to enable use of the effect in read-out heads. In 1997 the first read-out head based on the GMR effect was launched and this soon became the standard technology. Even the most recent read-out techniques of today are further developments of GMR. Read more on the Nobel website... Word of the Week:
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