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In this issue:
SiD Reaches Design Milestone
Library Task Force Survey Ends Today
Colloquium Today: Diamondoids

SLAC Today

Monday - April 20, 2009

SiD Reaches Design Milestone

A rendering of the CAD model of the Silicon Detector. (Image courtesy of Marco Oriunno and Norman Graf.)

This week, scientists from around the world are gathering in Tsukuba, Japan, for a major linear collider meeting called TILC09. There, three detector design concepts for the next linear collider will take center stage. The International Large Detector, the Fourth Concept Detector (so named because it was originally the final of four detector designs), and the Silicon Detector will be presented and reviewed.

Design groups for each of the three detector concepts recently submitted Letters of Intent to the International Linear Collider Physics and Experiments Research Director, Sakue Yamada, for review by the International Detector Advisory Group. Members of this group will begin reviewing the various proposals' strengths and weaknesses at TILC09.

SLAC plays a significant role in the design of the Silicon Detector, or SiD. "Completing the LoI represents a major milestone for SiD, and is the culmination of quite a lot of work designing, costing and benchmarking the detector," said physicist John Jaros, who leads the Linear Collider Detector department at SLAC with Marty Breidenbach.  Read more...

Library Task Force Survey Ends Today

Today is the final day of the SLAC Library Future Task Force Survey. The Library Task Force is seeking your input, to explore and define how the library can best meet your information needs. If you haven't yet, please take the survey today.

Colloquium Today: Diamondoids

(Image - SLAC Colloquium banner)

Today at 4:15 p.m. in Panofsky Auditorium, Stanford Assistant Professor of Materials Science & Engineering Nick Melosh will present "Molecular Diamond Science and Energy Applications."

Diamondoids are molecular fragments of diamond recently discovered in oil. These tiny diamonds (~10-21 carat) combine many of the facile processing of small molecules together with the unique properties of diamond. As one example, diamond surfaces are able to emit electrons much more easily than one would initially expect when the surface is hydrogen. Since diamondoids are essentially completely hydrogen-terminated diamond, Melosh's research group has investigated electron emission from ultra-thin films of these materials, with surprising results. Based on these observations the researchers suggest a new strategy to improve the efficiency of solar harvesting systems that relies upon direct electron emission rather than solid-state devices.

In his talk, Melosh will describe a general outline of this technique, with some initial theoretical efficiency limits. The talk is free and open to all.

Next Week: Arsenic in Southeast Asia

In next Monday's colloquium, Stanford University geochemist Scott Fendorf will speak about the problem of arsenic in southeast Asia.

Subscribers can read about Fendorf's work tracking arsenic from the Himalayas to southeast Asia's water supply in the July 2008 issue of Nature.

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