SLAC Today is
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In this issue:
First Pump-Probe Experiment at LCLS Completed
Second Harvest Food Drive Begins Tomorrow
Colloquium Today: Toward Self-Driving Cars
Monday - November 30, 2009 |
First Pump-Probe Experiment at LCLS CompletedThe first experiment using the Linac Coherent Light Source to illuminate molecules via a "pump-probe" technique has been completed by an international team of more than 30 scientists from institutions including Lawrence Berkeley National Laboratory, LCLS and the joint SLAC/Stanford PULSE Institute. Ryan Coffee, physicist with the LCLS Laser Group, presented initial results in a seminar at SLAC on Wednesday, November 18. Pump-probe experiments use one laser pulse, in this case an infrared pulse, to pump energy into a sample and then probe it with another laser pulse, in this case an LCLS X-ray pulse. Such experiments are ideal for looking at atomic and molecular interactions, which take place in tiny fractions of a second. The LCLS probe pulses were as short as a few quadrillionths of a second and a billion times brighter than any X-ray source produced in a laboratory. Coffee and his colleagues looked at the quantum behavior of electrons in nitrogen molecules, N2. The results represent a step toward a fundamental understanding of how nature converts light into chemical energy and might one day help revolutionize solar power, Coffee said. Read more... Second Harvest Food Drive Begins TomorrowIt's that time of year again when thoughts go to helping those in need, and this year it's hitting even closer to home. The local food banks have had a tremendous amount of requests and need our support now more than ever. Barrels will start showing up at SLAC tomorrow, December 1, and will remain until December 17. (See Barrel locations below.) If you would prefer to help with a monetary donation, you can do that by going to the Virtual Harvest Web site. There, enter companies: 250 or more, then scroll to SLAC National Accelerator Laboratory. Our Special ID number is 47748. Last year SLAC won a Silver Award helping families in the greater Bay Area. Let's do it again this year! Barrel Locations:
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