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In this issue:
Prepare for Warm Days during Cooling Tower Replacement
Silicon Detector Validated, Moves Forward
Welcome New SLACers!

SLAC Today

Tuesday - September 8, 2009

Prepare for Warm Days during Cooling Tower Replacement

(Photo - Cooling Tower 101)
Cooling Tower 101 has served SLAC for more than 40 years. (Photo by Shawne Workman.)

From its hillside domain at the intersection of Loop and PEP Ring Roads, Cooling Tower 101 recirculates water to cool air compressors, a low-conductivity water system and building air conditioning across the SLAC campus. The tower is a SLAC original, serving the lab since the 1960s, and it's due for an earthquake retrofit and upgrade. So it's coming down, starting next Monday, September 14, to make way for a new cooling tower with a reinforced base, upgraded electrical components and higher-capacity, 250-horsepower pumps.

The $1.62M tower replacement is the final phase in a larger Seismic and Operational Reliability Improvement project, which also included upgrades to cooling water piping and seismic retrofits for the Building 50 computing center floor. Scheduled completion for the entire SORI project is December 31 of this year. The cooling tower replacement team aims to have the new tower online in early December.

During the transition, from September to December, the lab will rely on a temporary cooling tower. Staff in affected buildings will need to be prepared for cooling shortages if the weather turns unusually hot. The temporary tower has limited capacity. To keep critical systems operating on very hot days, the team will need to limit air conditioning in some buildings.  Read more...

Silicon Detector Validated, Moves Forward

The Silicon Detector would be built on rollers, so that it can be pulled in and out of the beamline. (CAD model rendering courtesy of Marco Oriunno.)

Two of the three detector design concepts for the proposed next linear collider have been validated by the International Detector Advisory Group, and their conclusions endorsed by the International Linear Collider Steering Committee. These detector designs had been presented to the IDAG earlier this year in Letters of Intent, which outlined the type of detectors the researchers wish to build and the physics performance to be expected from each.

"This was a challenging and time consuming process," said physicist John Jaros, who co-heads SLAC's Linear Collider Detector department with Marty Breidenbach and also serves as a co-spokesperson for the Silicon Detector, one of the two validated design concepts. "All of these efforts ran on heroes who accomplished a lot with relatively little in the way of resources."

The validation process ensured that the proposed detectors can do justice to the physics that would be undertaken with the next linear collider, and that the proposing group has the ability and resources to complete a full detector design. Researchers working on the two validated detector concepts will now begin creating much more detailed designs.  Read more...

Welcome New SLACers!

(Photo by Doug Kreitz.)

New SLAC Staff attending the New Employee Orientation on September 3, 2009 included:

Front row, from left: Juan  Lezama Pacheco, Joe Blaylock, Joanne Stubbs, Jasmine Hasi

Middle row, from left: Yumiko Baba, Julia Chaffin, Lars Adamson, William Moore

Back row from left: LaPria Genevro, William Schlotter, Bob Nagler, Jim Gordon, Steven Berry, Dmitri Starodub, Jeffrey Rzepiela, Michele Swiggers, Varun Gopalakrishna, (Not pictured: Kenney, Chris)

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