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Tuesday, August 30, 2005 |
| Tuesday, August 30 3:30 p.m. Director's Coffee Break - 2nd Flr X-Over Note: There will be no Accelerator Physics and Technology Seminar today Wednesday, August 31 |
 Partly Cloudy 81º/60º Extended Forecast |
Secon Level 3 |
| Tuesday, August 30 - Chicken & Rice Soup - Mushroom Swiss Burger - Baked Meatloaf with a Roasted Tomato Demi-Glace - Parmesan Baked Fish - Peppered Beef - Ham & Pastrami Calzones - South of the Border Burritos with Chips & Queso The Wilson Hall Cafe now accepts Visa, Master Card, Discover and American Express at Cash Register #1. |
| Wednesday, August
31 Lunch Grilled Duck Salad with Green Beans Pear Almond Strudel Thursday, September
1 Chez Leon
Menu |
| Water from Village Lakes Keeps Tevatron Running | ||
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| Most people familiar with the
engineering of the Tevatron know that water cools the accelerator,
but few know just how much. According to Steve Krstulovich, an
engineer with FESS services, more than 40 million gallons evaporate
from the Main Injector and Tevatron's ring waterways and other
cooling ponds each month due to the accelerator's heat and the sun's
rays. That's the equivalent of 60 Olympic-sized swimming pools!
The ring ponds are a vital part of the Main Injector and Tevatron, dispersing heat into the air as water evaporates. But if these ponds become shallow their temperature creeps upward, stressing equipment and causing the accelerator to run less efficiently. "In turn, the accelerator requires more power and gives off more heat, increasing evaporation and making the water level drop even further," said Krstulovich. Keeping enough water in the Main Injector/Tevatron ring waterways
has been especially difficult this summer because of the drought
conditions. Precipitation is the main water source for the ponds,
and with normal rainfall, FESS can usually keep the waterways full
with some additional water pumped from the nearby Fox River and from
NuMI's underground experimental hall sump discharge. But because
this year's drought has been so extreme, Fermilab hasn't been able
to recharge its ponds with rain, and pumping from the Fox has been
severely limited by low river flow. This has left the site with a
water deficit it must manage through spring of 2006. |
| A Successful Workshop - Snowmass Organizers Express Appreciation | ||
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| Now that the two-week Snowmass Workshop
is over, the organizers, Ed Berger, of Argonne National Laboratory,
Uriel Nauenberg, of the University of Colorado at Boulder, Jim Brau
of the University of Oregon, and Mark Oreglia of the University of
Chicago, are breathing a sigh of relief. From getting funding to
reserving conference rooms to writing letters of invitation for
foreign participants in the middle of the night, the organizers made
every effort for a successful outcome. "The workshop was
scientifically very productive," said Berger. "The attitudes of all
the participants and conveners were great. Everyone came committed
to getting the job done." Read More |
| From
Interactions.org, August 29, 2005 Finding a Way to Test for Dark Energy Theorists show how satellite searches can distinguish among dark energy scenarios. What is the mysterious dark energy that's causing the expansion
of the universe to accelerate? Is it some form of Einstein's famous
cosmological constant, or is it an exotic repulsive force, dubbed
"quintessence," that could make up as much as three-quarters of the
cosmos? Scientists from Lawrence Berkeley National Laboratory
(Berkeley Lab) and Dartmouth College believe there is a way to find
out. |
| Après Snowmass | ||
Because we will be building this machine several years after the initial baseline configuration, a mechanism to allow evolution is absolutely necessary if the machine is to be "modern" when we finally build it. So in areas where we expect improvements, the working groups made recommendations for alternate configurations. While these alternate choices promise either technical improvements or cost savings, they also require additional R&D before they can replace the choices made for the initial baseline configuration. By the end of this year the Global Design Effort under Barry Barish's direction will place the baseline design under a "change control" mechanism to allow for disciplined changes of the design. This will be a novel application of "change control" since it will be done so early in the design phase of the project. Of course much work remains. Recommendations for some of the very difficult technical choices, such as one tunnel vs. two tunnels, or the choice of the damping ring design, remain to be made even after a huge amount of discussion. But recommendations on many other difficult choices, including the accelerating gradient, the luminosity parameters, the method for producing positrons and the IR configuration, have now been given to the GDE. The achievements at Snowmass bode well both for reaching an agreement on the baseline configuration by the end of this year and a reference design and cost estimate by the end of 2006. The 80 participants from Fermilab made significant contributions to the results of the workshop across a broad front that included accelerators, detectors, theory, communication and public outreach. I offer my personal thanks to each of them for their efforts. |
| There was a mistake in yesterday's story about West Nile virus. It states: "Recently, we recorded the first instance of a mosquito testing positive for the virus at Fermilab." Actually, we had 2 positive test results from mosquito samples last year. |
| Open Enrollment for the Life Insurance Plan The open enrollment period ends on Monday, September 12, 2005. The open enrollment form must be in by 5:00 P.M on September 12, 2005. You can access further information on the Web. Power Outage Fermilab Health Fair Upcoming classes Scottish Country Dancing International Folk Dancing |
