Dale Knutson Returns to PNNL; Bob Hettel Becomes Acting ALD for Accelerator Directorate

Dale Knutson (left) and Bob Hettel. (Photos by Brad Plummer.)

by Kelen Tuttle

SLAC Director Persis Drell has named Bob Hettel as acting associate laboratory director for the Accelerator Directorate. Hettel takes the reins from Dale Knutson, who has returned to Pacific Northwest National Laboratory after his two-year deployment to SLAC.

Hettel, who most recently served as deputy director for the Accelerator Directorate, first came to work at SLAC as a student in 1968. In the ensuing years, he helped design the first instrumentation for SPEAR and eventually became head of the Stanford Synchrotron Radiation Lightsource Accelerator Systems Division. Hettel will serve as Knutson's replacement until the search for a permanent replacement is completed. Read more...

Arthur Bienenstock Named to Royal Swedish Academy of Engineering Sciences

Arthur Bienenstock. (Photo courtesy Arthur Bienenstock.)

by Shawne Workman

The news came by fax. On March 31, the Royal Swedish Academy of Engineering Sciences sent Arthur Bienenstock word that he had been elected a foreign member of the academy during its general meeting on March 24.

"I was most pleasantly surprised by this unexpected honor, in spite of some signals that had arrived earlier," Bienenstock wrote in an e-mail to SLAC Today. "I had been doing what I love to do in Sweden – encourage science and university improvement."

Bienenstock was director of the Stanford Synchrotron Radiation Laboratory at SLAC from 1978 to 1997, among many other accomplished roles, and is currently special assistant for federal research policy to Stanford University President John Hennessy and director of the Wallenberg Research Link/Swedish Contact Center. Read more...

Risa Wechsler:
Shedding Light on the Dark Side

Risa Wechsler, assistant professor of physics at Stanford University and the SLAC National Accelerator Laboratory. (Photo: Stanford University.)

from the Kavli Foundation

At the Kavli Institute for Particle Astrophysics and Cosmology, Risa Wechsler looks for visible clues to unlock the riddles of the unseen Universe.

In short, her career path has led to three Kavli institutes and one program, giving her particularly extensive roots in the Kavli community. Read more from the Kavli Foundation...

Colloquium Today: Anthropogenic Nitrogen: Too Much of a Good Thing?

Today at 4:15 p.m. today in Panofsky Auditorium, Stanford University bio-geo-chemist Peter Vitousek will present "Anthropogenic Nitrogen: Too Much of a Good Thing?" The colloquium is free and open to all.

While human changes to the global carbon cycle have received a great deal of attention, humanity has altered several other cycles to a greater extent. More nitrogen is now fixed anthropogenically (mostly for fertilizer) than is fixed biologically in all terrestrial ecosystems. The resultant enrichment makes a relatively small contribution to climate change and a larger one to air quality—and it transforms the structure, dynamics, and diversity of many terrestrial and coastal marine ecosystems. Mitigating these changes will require far more efficient use of nitrogen in agricultural systems—a challenge that is complicated by the heterogeneity of intensive agricultural systems around the world.

Vitousek is a professor of biology at Stanford and senior fellow at the Wood Institute for the Environment.

Next week, Stanford and SLAC astrophysicist Phil Marshall will present "Gravitational Optics - Measuring Distances in the Universe with Galaxy-sized Lenses."

Events

Today (4:15 p.m.) SLAC Colloquium: Anthropogenic Nitrogen - Too Much of a Good Thing?
May 4 (3:00 p.m.) Photon Science Seminar: SSRL R&D: Present and Future Plans

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Astronomy Without A Telescope – Astronomy On Ice Universe Today
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<% Response.AddHeader "Last-modified", getArticleDate() 'Response.AddHeader "Last-modified","Mon, 01 Sep 1997 01:03:33 GMT" 'Monday, December 06, 2010 %>

View online at http://today.slac.stanford.edu/.

Dale Knutson Returns to PNNL; Bob Hettel Becomes Acting ALD for Accelerator Directorate Dale Knutson (left) and Bob Hettel. (Photos by Brad Plummer.) by Kelen Tuttle SLAC Director Persis Drell has named Bob Hettel as acting associate laboratory director for the Accelerator Directorate. Hettel takes the reins from Dale Knutson, who has returned to Pacific Northwest National Laboratory after his two-year deployment to SLAC. Hettel, who most recently served as deputy director for the Accelerator Directorate, first came to work at SLAC as a student in 1968. In the ensuing years, he helped design the first instrumentation for SPEAR and eventually became head of the Stanford Synchrotron Radiation Lightsource Accelerator Systems Division. Hettel will serve as Knutson's replacement until the search for a permanent replacement is completed. Read more... Arthur Bienenstock Named to Royal Swedish Academy of Engineering Sciences Arthur Bienenstock. (Photo courtesy Arthur Bienenstock.) by Shawne Workman The news came by fax. On March 31, the Royal Swedish Academy of Engineering Sciences sent Arthur Bienenstock word that he had been elected a foreign member of the academy during its general meeting on March 24. "I was most pleasantly surprised by this unexpected honor, in spite of some signals that had arrived earlier," Bienenstock wrote in an e-mail to SLAC Today. "I had been doing what I love to do in Sweden – encourage science and university improvement." Bienenstock was director of the Stanford Synchrotron Radiation Laboratory at SLAC from 1978 to 1997, among many other accomplished roles, and is currently special assistant for federal research policy to Stanford University President John Hennessy and director of the Wallenberg Research Link/Swedish Contact Center. Read more... Risa Wechsler: Shedding Light on the Dark Side Risa Wechsler, assistant professor of physics at Stanford University and the SLAC National Accelerator Laboratory. (Photo: Stanford University.) from the Kavli Foundation At the Kavli Institute for Particle Astrophysics and Cosmology, Risa Wechsler looks for visible clues to unlock the riddles of the unseen Universe. In short, her career path has led to three Kavli institutes and one program, giving her particularly extensive roots in the Kavli community. Read more from the Kavli Foundation... Colloquium Today: Anthropogenic Nitrogen: Too Much of a Good Thing? Today at 4:15 p.m. today in Panofsky Auditorium, Stanford University bio-geo-chemist Peter Vitousek will present "Anthropogenic Nitrogen: Too Much of a Good Thing?" The colloquium is free and open to all. While human changes to the global carbon cycle have received a great deal of attention, humanity has altered several other cycles to a greater extent. More nitrogen is now fixed anthropogenically (mostly for fertilizer) than is fixed biologically in all terrestrial ecosystems. The resultant enrichment makes a relatively small contribution to climate change and a larger one to air quality—and it transforms the structure, dynamics, and diversity of many terrestrial and coastal marine ecosystems. Mitigating these changes will require far more efficient use of nitrogen in agricultural systems—a challenge that is complicated by the heterogeneity of intensive agricultural systems around the world. Vitousek is a professor of biology at Stanford and senior fellow at the Wood Institute for the Environment. Next week, Stanford and SLAC astrophysicist Phil Marshall will present "Gravitational Optics - Measuring Distances in the Universe with Galaxy-sized Lenses."	Events Today (4:15 p.m.) SLAC Colloquium: Anthropogenic Nitrogen - Too Much of a Good Thing? May 4 (3:00 p.m.) Photon Science Seminar: SSRL R&D: Present and Future Plans Access (see all) Road Closure at Bldg. 34 Work on the SLAC Green New Hours for Alpine Gate Cooling Tower 101 Updates Announcements (see all \| submit) Lab Announcements New Safety Orientation for Non-Employees Released New Performance Evaluation Tool: Taleo Perform Community Bulletin Board Defusing the Nuclear Threat: Seven Free Events at Stanford Training ((see all \| register) Lab Training Calendar Registration Today (8:00 a.m.) CPR/First Aid Recertification Upcoming Workshops & Classes Online Tech Training Opportunities News (submit) Astronomy Without A Telescope – Astronomy On Ice Universe Today Positronium: Potential for Future Gamma Ray Lasers and Fusion Power? Physorg Reverse Engineering a Quantum Compass Science News
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<% Response.AddHeader "Last-modified", getArticleDate() 'Response.AddHeader "Last-modified","Mon, 01 Sep 1997 01:03:33 GMT" 'Monday, December 06, 2010 %> View online at http://today.slac.stanford.edu/.