April 23, 2014
Brookhaven scientists and engineers achieved a major milestone in the commissioning of the state-of-the-art National Synchrotron Light Source II on April 5, 2014. For the first time, the project team was able to store electron beam in the NSLS-II storage ring overnight into the next morning with an initial beam lifetime of about three hours.
Laboratory Director Doon Gibbs called it a “significant advance” and said, “Achieving stored beam means the team can now accelerate further optimization of the storage ring. Thanks in particular go to Division Director for Accelerator Systems Ferdinand Willeke for his strong leadership of the design, construction, and commissioning of the NSLS-II accelerator systems.”
This achievement is the result of more than seven years of planning, design, construction, and commissioning of Brookhaven’s newest facility by the Photon Sciences staff.
To learn more about the NSLS-II visit: www.bnl.gov/ps/nsls2/about-NSLS-II.asp
2014-4826 | INT/EXT | Media & Communications Office
April 23, 2014
Jiajun Wang, Karen Chen and Jun Wang prepare a sample for study at NSLS beamline X8C.
Brookhaven scientists have made the first 3D observations of how the structure of a lithium-ion battery anode evolves at the nanoscale in a real battery cell as it discharges and recharges. The details of this research could point to new ways to engineer battery materials to increase the capacity and lifetime of rechargeable batteries.
"This work offers a direct way to look inside the electrochemical reaction of batteries at the nanoscale to better understand the mechanism of structural degradation that occurs during a battery's charge/discharge cycles," said Brookhaven physicist Jun Wang, who led the research. "These findings can be used to guide the engineering and processing of advanced electrode materials and improve theoretical simulations with accurate 3D parameters."
Chemical reactions in which lithium ions move from a negatively charged electrode to a positive one are what carry electric current from a lithium-ion battery to power devices such as laptops and cell phones. When an external current is applied - say, by plugging the device into an
outlet - the reaction runs in reverse to recharge the battery.
Scientists have long known that repeated charging/discharging (lithiation and delithiation) introduces microstructural changes in the electrode material, particularly in some high-capacity silicon and tin-based anode materials. These microstructural changes reduce the battery's capacity - the energy the battery can store - and its cycle life - how many times the battery can be recharged over its lifetime. Understanding in detail how and when in the process the damage occurs could point to ways to avoid or minimize it.
To learn more visit: www.bnl.gov/newsroom/news.php?a=11619
2014-4827 | INT/EXT | Media & Communications Office
April 23, 2014
Brookhaven physicist Howard Gordon displays a Kapton electrode from the LHC's ATLAS detector to some of the high-school students who participated in the Masterclass. Front row: Theresa Bender, Spring Yu (both of Shoreham Wading River), Dazia Enriquez (William Floyd), Matthew Ciullo (Farmingdale); back row: Anupam Bubhram Mahadeo (William Floyd), Eda Algur (Smithtown High School West), Justin Lerner (Smithtown High School East) and Elijah Mas (Farmingdale).
Last month, 55 high school students from the Shoreham-Wading River, William Floyd, Farmingdale, and Smithtown school districts got a chance to experience what it’s like to be part of an international physics collaboration by participating in a particle physics “International Masterclass” with physicists involved in research at the Large Hadron Collider (LHC) located at Europe’s CERN laboratory. The students analyzed data from the LHC’s ATLAS experiment and presented their results via live videoconference from BNL to physicists at CERN, along with students from Germany and Ireland.
The event was part of a larger annual effort to engage students worldwide in the exciting world of particle physics. It was coordinated by Dresden University of Technology and QuarkNet – a program for teachers supported by the National Science Foundation and the U.S. Department of Energy.
The students prepared for the event by attending lectures and demonstrations, where under the guidance of Brookhaven physicist Helio Takai, they searched for evidence of subatomic particles in data from the LHC’s proton-proton collisions. They analyzed 1,000 ATLAS events to arrive at the results that were presented during the videoconference.
“The CERN Masterclass is a microcosm of how physicists collaborate to explore the frontier of particle physics,” Takai said. “We have been lucky to partner with great physics teachers from schools near us for this fabulous experience.”
Learn more about the CERN Masterclass here: www.bnl.gov/newsroom/news.php?a=24729
2014-4828 | INT/EXT | Media & Communications Office
April 23, 2014
Join Brookhaven Lab and Stony Brook University researchers on Sunday, May 18 at 2 PM for the screening of a documentary showcasing the hunt for the Higgs boson at CERN’s Large Hadron Collider. A panel discussion will follow with a live video feed with Brookhaven scientists at the ATLAS experiment in Geneva, Switzerland, where the Higgs particle was discovered. The screening will be held at Cinema Arts Centre, 423 Park Avenue, Huntington. Tickets are $15. Purchase Tickets (Cinema Arts Centre website)
2014-4830 | INT/EXT | Media & Communications Office
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April 23, 2014
*The events listed above are free and open to the public. Visitors 16 and older must bring a photo ID for access to BNL events.
2014-4829 | INT/EXT | Media & Communications Office