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:10/11/2017)... ... October 11, 2017 , ... Personal eye wash is a basic first aid supply ... a time. So which eye do you rinse first if a dangerous substance enters both ... Duo Eye Wash with its unique dual eye piece. , “Whether its dirt and ...
(Date:10/11/2017)... Netherlands and LAGUNA HILLS, Calif. ... Institute of Cancer Research, London (ICR) ... MMprofiler™ with SKY92, SkylineDx,s prognostic tool to risk-stratify patients with ... known as MUK nine . The University of ... which is partly funded by Myeloma UK, and ICR will ...
(Date:10/10/2017)... ... 10, 2017 , ... San Diego-based team building and cooking events company, Lajollacooks4u, ... The bold new look is part of a transformation to increase awareness, appeal ... growth period. , It will also expand its service offering from its signature gourmet ...
(Date:10/10/2017)... research firm Parks Associates announced today that Tom Kerber ... Annual Meeting , October 11 in Scottsdale, Arizona . ... how smart safety and security products impact the competitive landscape. ... Parks Associates: Smart Home Devices: Main Purchase Driver ... "The residential security market has experienced continued growth, and the ...
Breaking Biology Technology:
(Date:4/5/2017)... 2017  The Allen Institute for Cell Science today ... one-of-a-kind portal and dynamic digital window into the human ... first application of deep learning to create predictive models ... and a growing suite of powerful tools. The Allen ... future publicly available resources created and shared by the ...
(Date:3/30/2017)... , March 30, 2017  On April 6-7, ... Hack the Genome hackathon at Microsoft,s headquarters ... two-day competition will focus on developing health and wellness ... Hack the Genome is the first ... tremendous. The world,s largest companies in the genomics, tech ...
(Date:3/27/2017)... ROCKVILLE CENTRE, N.Y. , March 27, 2017 ... by Healthcare Information and Management Systems Society (HIMSS) ... Analytics Outpatient EMR Adoption Model sm . In ... top 12% of U.S. hospitals using an electronic ... recognized CHS for its high level of EMR ...
Breaking Biology News(10 mins):