Navigation Links
Ion armageddon: Measuring the impact energy of highly charged ions
Date:8/31/2011

Much like a meteor impacting a planet, highly charged ions hit really hard and can do a lot of damage, albeit on a much smaller scale. And much like geologists determine the size and speed of the meteor by looking at the hole it left, physicists can learn a lot about a highly charged ion's energy by looking at the divots it makes in thin films.

Building upon their work for which they were recently awarded a patent,* scientists at the National Institute of Standards and Technology (NIST) and Clemson University have measured the energy of highly charged ion impacts on a thin film surface for the first time in detail.** Understanding how ions discharge their energy upon impact will help researchers to make better predictive models of how the particles affect surfaces.

The question isn't trivial. Ions are used in exactly that way for a variety of micro- and nanoscale production processes, techniques such as ion milling and etching. Better predictive models may also help researchers curtail ionic erosion where it would be a bad thing, such as inside a fusion reactor.

The research team used xenon atoms from which they had stripped all but 10 of the atoms' original 54 electrons. Making an atom so highly ionized takes a lot of energyabout 50,000 electron volts. The atom soaks up all the energy that went into freeing the electrons until it is capable of imparting more energy, and thus more damage, than could be done with kinetic energymass and speedalone.

"When the highly charged ion is finally released and hurtles into its target, most of its energy, about 60 percent, blows back in the 'splash' and dissipates into the vacuum," says Josh Pomeroy. "According to our measurements, 27 percent of the remaining 40 percent of the ion's energy goes into changing the shape of the materialmaking divots."

Pomeroy says that the remaining 13 percent is most likely converted to heat.

The group first began looking into nanoscale pitting of thin films to help improve the performance of data storage hard drives, which used aluminum oxide thin films as an insulator between magnetic plates. They used ions to pockmark the surface of these films and showed that the depth of the pitting could be determined by measuring minute changes in electrical conductance through the film.

The original motivation for the work has abated, but the group's method and materials remain useful for measuring the energy transfer of highly charged ions and calibrating industrial systems using high-energy ion beams.


'/>"/>

Contact: Mark Esser
mark.esser@nist.gov
301-975-8735
National Institute of Standards and Technology (NIST)
Source:Eurekalert  

Related biology technology :

1. Measuring the electrical properties of nano-crystals
2. Reportlinker Adds Cancer Vaccines: Measuring Market Potential
3. Elsevier Announces 2010 Journal Impact Factor Highlights
4. MDOUTLOOK® 4th Annual Quick Polls From ASCO 2011: Report on Clinical Impact of New Developments in Cancer Therapeutics
5. Environmental Training Center Prepares Companies to Handle Nanotechnology Environmental and Human Safety Impacts
6. Newly Updated for 2011: Medical Science Liaison Study Shows Growth in KOL Outreach, Impact
7. Clean fuel worsens climate impacts for some vehicle engines: UBC study
8. WARFARIN Study Launched at WellStar Health System to Assess Impact of Genetic Testing in Reducing Hospitalizations and Deaths Caused by Warfarin
9. WARFARIN Study Launched at Overlake Hospital Medical Center to Assess Impact of Genetic Testing in Reducing Hospitalizations and Deaths Caused by Warfarin
10. Advancing Patient Care and Driving Economic Impact, Indianas Health Information Technology Innovation Cluster Serves as National Model
11. Small material, big impact
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Ion armageddon: Measuring the impact energy of highly charged ions
(Date:2/4/2016)... ... February 04, 2016 , ... Shimadzu Scientific ... LC-MS, host live demos and poster sessions, and present on the analysis of ... takes place March 6 to 10 at the Georgia World Congress Center in ...
(Date:2/4/2016)... and MENLO PARK, Calif. , ... DMPI) ("DelMar" and the "Company"), a biopharmaceutical company focused on ... that it will present at the 18 th ... 8, 2016 at 10:00 a.m. EST in New ... DelMar,s president and CEO, will provide an update on the ...
(Date:2/4/2016)... Feb. 4, 2016 Sinovac Biotech Ltd. ("Sinovac" ... provider of biopharmaceutical products in China ... board of directors received on February 4, 2016 a ... a consortium comprised of PKU V-Ming ( Shanghai ... Ltd., CICC Qianhai Development ( Shenzhen ) ...
(Date:2/3/2016)...   ViaCyte, Inc ., a leading, privately-held ... cell-derived islet replacement therapy for the treatment of ... that ViaCyte and Janssen Biotech, Inc., one of ... have agreed to consolidate the assets of the ... ViaCyte with an exclusive license to all BetaLogics ...
Breaking Biology Technology:
(Date:2/2/2016)... NEW YORK , Feb. 2, 2016 Technology ... service presents an analysis of the digital and computed ... Malaysia , and Indonesia ... current trends and market size, as well as regional ... by country and discusses market penetration and market attractiveness, ...
(Date:2/1/2016)... smart wallet ( www.wocketwallet.com ) announces the launch of a new video ... Las Vegas , where Joey appeared at the Wocket ... Vegas , where Joey appeared at the Wocket booth to meet ... filmed at the Consumer Electronics Show (CES2016) in Las Vegas ... greet fans. --> --> The ...
(Date:1/22/2016)... , January 22, 2016 ... the addition of the  "Global Behavioral ... offering. --> http://www.researchandmarkets.com/research/4lmf2s/global_behavioral ) ... "Global Behavioral Biometric Market 2016-2020"  report ... Research and Markets ( http://www.researchandmarkets.com/research/4lmf2s/global_behavioral ) has ...
Breaking Biology News(10 mins):