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"It is truly a team effort," says Jonathan Dorfan, project leader for SLAC's B Factory, which consists of the rebuilt PEP-II collider and the BaBar detector. "PEP-II has involved people from all divisions within SLAC as well as in our DOE sister labs at Berkeley and Livermore." Authorized by Congress in October of 1993, the PEP-II construction project is budgeted at $177 million and scheduled for completion in fall of 1998, when collisions between the Low Energy Ring (LER) and the High Energy Ring (HER) will begin. These two independent storage rings sit atop each other in the converted PEP tunnel and operate at different energy levels. The project is on time and on budget, and much of the credit for this timeliness is attributed to the Department of Energy and Congress. "The support from all levels has been a tremendous boon to this project," said Dorfan. When completed, the B Factory will produce sub-atomic particles called B mesons which tend to come apart with more particles than antiparticles present. "This could reveal an important missing link to explain why there's more matter than anti-matter in the universe," according to Dorfan. Berkeley Lab took the lead in the design and implementation of the Low Energy Ring. They were responsible for the design and fabrication of the LER magnets. The LER arc rafts (assemblies of magnets and vacuum chambers that were moved as units to SLAC) were built at Berkeley. They contributed to the beam damping systems, first tested on the Advanced Light Source at Berkeley. Physicists from LBNL will participate in the commissioning of the LER. Livermore Lab managed the fabrication of the 24 radio frequency cavities for the two rings. They contributed to the fabrication of components of the vacuum chambers for both rings, in particular, the straight section drift chambers, the straight section bellows modules, and the distributed ion pumps (dips) for the High Energy Ring. They did the research and development on the dips. SLAC personnel were responsible for the HER, the interaction region and the Control System. They provided the design and implementation of the required infrastructure, such as the cooling, power, and personnel protection systems. They are responsible for overall system integration and installation. On-site safety during construction and operation is the responsibility of SLAC. SLAC and LBNL personnel designed, constructed, and commissioned the RF system. The beam damping systems were a collaborative effort between SLAC and LBNL. The operation and maintenance of the machine is SLAC's responsibility. Thanks to the team effort of these three labs, physicists will soon be able to gather data on what took place less than 10-34 seconds after the start of the Big Bang and thus fill in one of the mysteries of physics. Visit the B Factory web site at http://www.slac.stanford.edu/accel/pepii/home.html Submitted by the Stanford Linear Accelerator Center
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By making gene alterations to change the structure of a fat-bending enzyme called desaturase, he and his colleagues have succeeded in persuading plants to insert extra bends in their fat molecules, called fatty acids. This miniscule difference on the molecular scale makes a world of difference when the plants are harvested for their oil. A single bend in a straight molecule can mean the difference between solid fat and liquid oil; multiple bends make an edible oil polyunsaturated, and less likely to aggravate heart disease. Some oils can be eaten but not digested, reducing the calories absorbed from the foods they're in. So someday, Shanklin's research may help agribusiness companies do more for the figures of millions of Americans than a clothing designer ever could. Both foods and fibers made from oils--from margarine to nylon--could be improved using bioengineered plants like the ones Shanklin grows. The oil crop industry is worth $80 billion annually, and many more millions are spent to convert non-renewable petroleum products into useful oils for manufacturing. Shanklin's work could help give these industries sustainable sources of oil. Altering a plant's genes is not an easy task, but its rewards are great. Besides contributing to the world's quest for healthier foods and sustainable agriculture, Shanklin has been recognized by the White House with a Presidential Early Career Award for Scientists and Engineers, and by DOE with a Young Scientist Award. Submitted by Brookhaven National Laboratory |