SLAC Today is available online at:
http://today.slac.stanford.edu

In this issue:
B Factory - Full Steam Ahead
People Today: Diana Rogers' Love - Wildlife Photography
SLACSpeak: R2A2 - A Sci-Fi Robot?

SLAC Today

Wednesday - April 5, 2006

The two damaged ceramic tiles that caused PEP-II and BaBar to run at low luminosity. (Click on image to see the damaged tiles in context.)

B Factory - Full Steam Ahead

The PEP-II and BaBar teams have found and fixed the vacuum problem that had limited luminosity to about half normal values for the past three months. The problem was due to electrical arcing that damaged two ceramic tiles in the center of a critical vacuum system bellows near the BaBar detector.  This damage created small, sudden releases of ceramic particles that temporarily spiked vacuum pressure, created background in the detector, and ultimately tripped off the beam.

Since Monday morning, the PEP-II rings have once again been running at high current, well above the currents that had previously caused the arcing. BaBar is already taking data again while the vacuum is being "scrubbed" back to pristine conditions, a normal procedure after the accelerator is turned back on.

"Everybody is very pleased and looking forward to resuming our plans for tripling the data set," said BaBar spokesman David MacFarlane.  Read more...

(Weekly Column - Profile)

Diana Rogers' Love: Wildlife Photography

(Image - Diana Rogers) "Wildlife photography is my passion and my joy," SLAC Photographer Diana Rogers says with a smile. "It's really cool the way it started. I began doing photo story-boards on my website with pictures and text like 'A Day at the San Francisco Zoo.'" Soon after, Rogers began receiving emails from people who were housebound, thanking her for taking them on a trip to the zoo. Thus encouraged, her avocation began to grow.

In her years of communing with the world of nature, Rogers has formed a special connection to animals. "You have to be very aware of one thing: their behavior is dictated by a 'predator-prey' logic and you must play by the rules," she says. According to Rogers, the moment you lock eyes with an animal, you must stop and let the animal decide whether you are predator or prey. If you move forward, the animal will most likely determine you are a predator and respond in kind. But if you remain still, she says, it will consider you prey and simply continue with what it was doing.

"Wherever there are animals I will be there, trying to get the pictures," she says.

Rogers' strikingly beautiful wildlife photos coupled with story lines can be found on her website, www.crystal-reflections.com.

R2A2: A Sci-Fi Robot?

(Image - SLACSpeak) Break the code and learn the lingo: SLACSpeak is a resource for staff, students, visitors and contractors at the SLAC site. Both a continuously updated website and an occasionally re-issued hard-copy publication produced by the SLAC Archives and History Office, SLACSpeak provides definitions for acronyms and terms used in all directorates.

There are several easy and convenient ways to locate SLACSpeak when you need to look up an unfamiliar acronym or term:

On the web:
- Type slacspeak (one word) in the grey and white global navigation (search) box on any of SLAC's pages.
- Go to any top-level page on the SLAC site with left-hand navigation links, and click on the "SLACSpeak Glossary" flyout link under "About SLAC."
- Go to the Detailed Index and look under S.
- Bookmark SLACSpeak on your web browser.

The SLACSpeak glossary may be searched on the web by acronym or by definition, or readers may browse an online alphabetical list of the terms and acronyms it contains. There is also a "Suggest Term" link on the site that allows users to submit terms and acronyms that they have searched for and not found, and that they would like to have added to the glossary.

If you would prefer to have a hard copy of SLACSpeak, stop by the SLAC Library or Archives to pick up the June 2000 paperback edition.

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