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In this issue:
SLACerMan Says: "Watch Out When Backing Up!"
Fermi Telescope's Hunt for Cosmic Ray Origins
Lightsource Communicators Wrap Up Meeting at SLAC

SLAC Today

Thursday - February 25, 2010

SLACerMan Says:
"Watch Out When Backing Up!"

(Image and video by SLAC InfoMedia Solutions.)

SLAC Vehicle Safety Month wraps up this week with handy reminders from SLACerMan about keeping alert for obstacles, pedestrians, and the unexpected—especially while backing large vehicles—in "Avoiding Vehicle Accidents."

See also the first two videos, "SLAC Main Gate" and "Take It Easy Around Loop Road!"

Coming soon: a new traffic safety e-mail line from SLAC Security, where you can communicate concerns about vehicle safety issues around site. Keep an eye on SLAC Today in early March for the announcement.

Fermi Telescope's Hunt for Cosmic Ray Origins

(Image - supernova remnant W44)
Supernova remnant W44 as imaged by the Fermi telescope's Large Area Telescope and enhanced with a restoration technique. The green contours indicate the remnant seen with infrared light. (Image courtesy NASA/DOE/LAT collaboration.)

New images from the Fermi Gamma-ray Space Telescope show where supernova remnants emit radiation a billion times more energetic than visible light. The images bring astronomers a step closer to understanding the source of some of the universe's most energetic particles–cosmic rays.

Cosmic rays consist mainly of protons that move through space at nearly the speed of light. In their journey across the galaxy, the particles are deflected by magnetic fields. This scrambles their paths and masks their origins.

"Understanding the sources of cosmic rays is one of Fermi's key goals," said Stefan Funk, an astrophysicist at the Kavli Institute for Particle Astrophysics and Cosmology, jointly located at SLAC National Accelerator Laboratory and Stanford University.

When cosmic rays collide with interstellar gas, they produce gamma rays.

"Fermi now allows us to compare emission from remnants of different ages and in different environments," Funk added. He presented the findings Monday at the American Physical Society meeting in Washington, D.C.  Read more from Symmetry Breaking...

(Photo by Julie Karceski.)

Lightsource Communicators Wrap Up Meeting at SLAC

This week, SLAC hosted a meeting to discuss the communication goals of labs with light sources. Communication officers from around the world gathered in the Kavli Building for the two-day meeting, and also toured SLAC's Klystron Gallery and Linac Coherent Light Source as well as Berkeley Lab's Advanced Light Source. This group also collaborates on,, a Web site that distills light source news and information from around the world.


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