SLAC Today is available online at:
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In this issue:
Straightening the LCLS
A Bright Idea: Change a Light
Dorfan Today: LCLS Groundbreaking October 20th
Safety First

SLAC Today

Monday - October 16, 2006

Eric Lundahl demonstrates how a sapphire-tipped probe will be used to map the inside of the LCLS undulators.

Straightening the LCLS

In the Magnet Measurement Facility sits an impressive new measuring tool that will be instrumental in getting the Linac Coherent Light Source online. The Leitz coordinate measuring machine is the last stage of off-site preparation for the 40 LCLS undulators.

"It's the most accurate coordinate measuring device of its size in the U.S.," says Quality Inspection group leader Eric Lundahl. With a base that measures 4.5 meters in length, the new Leitz machine is almost six times as long as and far more sensitive than the next most advanced instrument on campus. Positions can be measured with an accuracy of 4 microns, one tenth the width of a human hair. Its computer-controlled arm holds a ceramic probe capped with a synthetic sapphire, which moves the along the surface of an object much like a fingertip. The location information is sent back to the computer, which produces a three-dimensional map with great accuracy. A pneumatic isolation system under the machine's granite bed blocks out ground vibrations from sources such as passing trucks. Read more...

(Director's Column - Dorfan Today)

LCLS Groundbreaking October 20th

As you are by now aware, excavation has commenced for the Linac Coherent Light Source project. To mark the beginning of this momentous new construction project, the biggest since the construction of the LINAC in the sixties, I would like to personally invite you to the official groundbreaking event on October 20, starting at 10 a.m.

In attendance will be many dignitaries from Washington DC, Stanford, Local and State government. Provost John Etchemendy will provide a warm Stanford welcome and introduce the keynote speaker Dr. Raymond Orbach, Under Secretary of Science for the Department of Energy. We anticipate participation from many Congressional leaders; so far Congress-persons Mike Honda and Zoe Lofgren are confirmed.

This is our opportunity to come together to thank the DOE, our political representatives and Stanford for their strong support for our laboratory. I urge you all to come to the groundbreaking and give them an appreciative SLAC welcome.

The LCLS team and Turner Construction have worked hard to make this a special celebration, equal to the magnitude of this exciting project. Crews will erect a special canopied facility for the ceremony in the parking lot of the Collider Hall (Building 750). Music, food and refreshments will be provided. Large plasma-screen televisions will show a special multimedia presentation preceding the ceremony and project, in real time, the ceremony and speeches.

There are two ways of getting to the celebration on Friday. Starting at 9:30 a.m., shuttle buses will run from Parking Lot C, opposite the Guest House. After the groundbreaking the same buses will provide transportation back to Parking Lot C. If the weather stays fine, which we all hope it does, you may prefer to walk. You can pass through Gate 17 and follow the north leg of PEP Ring Road, which will be closed to traffic. Please do not use your own cars to get to the groundbreaking. There is a complex organization in place to allow the buses, VIP limousines and pedestrians easy access to the site. There is no provision for private car parking at the event venue, and private cars will only serve to snarl up the system and cause excessive delays. More detailed information on the event will appear this week in SLAC Today.

The LCLS groundbreaking event will officially mark the beginning of a very exciting phase in SLAC's history. Excavation crews have already made tremendous progress in reforming the familiar landscape in preparation for civil construction of the LCLS, and this is an ideal opportunity for you to see the construction site up-close, which is otherwise strictly off-limits to unescorted personnel. Join your friends and colleagues to celebrate this truly unique event.

A Bright Idea:
Change a Light

(Image - CFLs vs. bulbs)

Nearly 10 years ago, Heather Woods put a new light bulb in one of her reading lamps at home. The bulb—a compact fluorescent light (CFL) bulb—has since shed light on hundreds of books, magazines, and newspapers, and only recently needed to be replaced.

"I have CFLs everywhere I can fit them at home," says Woods, a writer for the SLAC communications office. "I love knowing that I'm saving energy and doing something good for the environment. And it saves me trips to the hardware store."

Along with lasting up to 10 times longer than incandescent light bulbs, CFL bulbs use two-thirds less energy. For consumers, that translates into a savings of about $30 over the life of each bulb. For the environment, it translates into 450 fewer pounds of greenhouse gases emitted into the atmosphere from power plants.

With these benefits in mind, the Department of Energy's (DOE) Office of Science is encouraging all SLAC employees to take the "Change a Light" pledge. Pledgers agree to replace one or more incandescent bulbs at home with an ENERGY STAR-qualified CFL bulb.

The Change a Light pledge is part of a nationwide, energy-conservation initiative led by DOE and the U.S. Environmental Protection Agency. The DOE Office of Science aims to have nearly 2,750 of its own employees take the pledge by November 30. As of today, it is 47% of the way to that goal, with 1,287 employees pledging to change 2,625 bulbs.

To join this energy-saving effort and add your own pledge to the total, simply visit the Change a Light website and fill in the requested information, making certain that "DOE—Office of Science" appears in the referring organization box. Next, click the "Submit Pledge" button—and then remember to follow through by making the switch to an ENERGY STAR-qualified CFL bulb!

Safety Firsts

You often hear it said that people who survive major heart attacks re-start their lives with often a dramatically different perspective. Would you most likely be in the "no heart attack—no change needed" category?

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