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In this issue:
From the Acting Director of ETS: A Collaboration of Engineering and Technical Teams
Library Offers New E-subscription to California Building Codes
Word of the Week: Radiation

SLAC Today

Friday - April 10, 2009

From the Acting Director, ETS: A Collaboration of Engineering and Technical Teams

(Photo - Karen Fant)

The Engineering and Technical Support Directorate has a logo. At first glance this may seem trivial, but the process of creating a logo provided an opportunity for the six unique departments that make up the directorate to consider how we are united around our common goal to support the laboratory. Department heads from the Controls, Klystron, Mechanical Design, Mechanical Fabrication, Metrology, and Power Conversion departments brainstormed to find our unifying concept: "ETS delivers hardware and technology that enables SLAC's science." We asked ETS staff to submit logo ideas. Jim Stanfield of Mechanical Design quickly came up with a winning solution, illustrating progress from nuts and bolts, through technology to delivering science. Barbara Hemstad of ETS Administration and Greg Stewart of InfoMedia Solutions provided the finishing touches.

(Image - ETS logo)

The departments that make up ETS have been together in one form or another since SLAC's beginning, starting with the Technical Division of Project M—the Stanford University venture that later became the Stanford Linear Accelerator Center. Organizational charts from the 1960s included group names such as Klystron, Microwave Engineering, Modulators, Instrumentation and Control, Mechanical Design and Fabrication, and Electronics. It doesn't take much imagination to see the evolution from those early days to the current departments. Laboratory reorganization in 2005 moved the six departments from the Technical Division into the newly formed Operations Directorate, and restructuring within the past eighteen months created the current ETS Directorate.  Read more...

Library Offers New E-subscription to California Building Codes

With the laboratory in an era of expansion and renewal, including construction of the Linac Coherent Light Source and other projects and infrastructure improvements, there is an increasing demand for construction-related state codes, standards and specifications. To meet this demand, the SLAC Library has purchased an online subscription to the 2007 California State Building Codes. The subscription includes the building, fire, mechanical and plumbing codes.  Read more...

(Image - the Sun)
(Image: Symmetry magazine.)

Word of the Week: Radiation

"Radiation" may evoke visions of glowing green nuclear goo, but the word is much more general than that, and most often benign. Radiation is the emission of energy by a source and its journey through space, or any medium. The term can refer to the emission process or to the energy itself.

One kind of radiation is electromagnetic, in which a moving charge generates self-propagating waves. Radio waves, microwaves and visible light are examples. Another type, acoustic radiation, is vibration transmitted through matter—"sound," when we can hear it. A third category is particle radiation, as illustrated by the shedding of alpha or beta particles from radioactive materials such as uranium or thorium.

Radiation is not generally dangerous unless it has enough energy to knock electrons from atoms or molecules. At high doses, this "ionizing" radiation can damage tissue; with long-term exposure, it can cause cancer. Alpha and beta particles are ionizing. So is short-wavelength electromagnetic radiation, including X-rays and gamma rays at high doses. Low and brief doses, as from a dental X-ray or normal daily exposure to cosmic background radiation, are not generally considered dangerous. 

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