Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Laser Research Shows Promise for Cancer Treatment: New insights gained on how lasers generate ions in dense plasmas

Sasi Palaniyappan (right) and Rahul Shah (left) inside a target chamber where the TRIDENT short pulse laser is aimed at a very thin foil target.
Sasi Palaniyappan (right) and Rahul Shah (left) inside a target chamber where the TRIDENT short pulse laser is aimed at a very thin foil target.

Abstract:
Scientists at Los Alamos National Laboratory have observed for the first time how a laser penetrates dense, electron-rich plasma to generate ions. The process has applications for developing next generation particle accelerators and new cancer treatments.

Laser Research Shows Promise for Cancer Treatment: New insights gained on how lasers generate ions in dense plasmas

Los Alamos, NM | Posted on August 20th, 2012

The results, published online August 19 in Nature Physics, also confirm predictions made more than 60 years ago about the fundamental physics of laser-plasma interaction. Plasmas dense with electrons normally reflect laser light like a mirror. But a strong laser can drive those electrons to near the speed of light, making the plasma transparent and accelerating the plasma ions.

"That idea has been met with some skepticism in the field," said Rahul Shah of LANL's plasma physics group. "We think that we've settled that controversy."

The team, which also included researchers from the Max Planck Institute for Quantum Optics in Garching, Germany and Queens University in Belfast, UK, used the 200 trillion-watt short-pulse TRIDENT laser at Los Alamos National Laboratory to observe the transparency phenomenon at 50 femtosecond resolution. Until now, those dynamics have been witnessed only in computer simulations.

The team found close agreement between the model and their experiments, which confirms what Los Alamos National Laboratory scientists have long suspected—that directing a short-pulse laser at a very thin carbon foil target will make the foil transparent to the laser.

"In a sense it also validates the simulation code that researchers have been using for some time," said Sasi Palaniyappan of LANL's plasma physics group. "At the same time it also tells us that we're doing an experiment that's as close as possible to simulation."

The results will help advance work to control the shape and timing of laser pulses, precision that is necessary for developing next-generation, laser-driven particle accelerators, he said. The researchers have recently been awarded internal laboratory funding from the office of Laboratory Directed Research and Development (LDRD) to pursue these applications.

They now plan to add a second foil target, which could benefit from further focusing and faster turn-on of the laser light transmitted through the first foil. One application of the resulting ultra-short ion bunches is to rapidly heat material and study the ensuing dynamics.

Particles accelerated by conventional accelerators aren't fast enough for such physics experiments. Also, energetic ions are applicable to cancer therapy. A more compact, laser-driven ion source would make treatment less expensive and more accessible to patients.

This work was sponsored by the Los Alamos National Laboratory Directed Research and Development program, U.S. Department of Energy, the U.S. Office of Fusion Energy Sciences and the U.S. Domestic Nuclear Detection Office.

####

About Los Alamos National Laboratory
Los Alamos National Laboratory, a multidisciplinary research institution engaged in strategic science on behalf of national security, is operated by Los Alamos National Security, LLC, a team composed of Bechtel National, the University of California, The Babcock & Wilcox Company, and URS for the Department of Energy’s National Nuclear Security Administration.

Los Alamos enhances national security by ensuring the safety and reliability of the U.S. nuclear stockpile, developing technologies to reduce threats from weapons of mass destruction, and solving problems related to energy, environment, infrastructure, health, and global security concerns.

For more information, please click here

Contacts:
Sarah Keller
(505) 667-7000

Copyright © Los Alamos National Laboratory

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

The paper is titled “Dynamics of relativistic transparency and optical shuttering in expanding overdense plasmas.” It can be accessed via digital object number http://dx.doi.org/10.1038/NPHYS2390. The DOI can be used to retrieve the abstract and full text (Nature Physics abstracts are available to everyone, full text only to subscribers).

Related News Press

News and information

Study finds long-term survival of human neural stem cells transplanted into primate brain April 23rd, 2014

High-Performance, Low-Cost Ultracapacitors Built with Graphene and Carbon Nanotubes: Future devices based on technology could bridge gap between batteries and conventional capacitors in portable electronics and hybrid electric vehicles April 23rd, 2014

Guo Lab Shows Potential of RNA as Heat-resistant Polymer Material for Nanoarchitectures April 23rd, 2014

National Space Society Congratulates SpaceX on the Success of CRS-3 and the First Flight of the Falcon 9R April 22nd, 2014

Nanoreporters tell 'sour' oil from 'sweet': Rice University's hydrogen sulfide nanoreporters gather intel on oil before pumping April 22nd, 2014

Laboratories

Berkeley Lab Researchers Demonstrate First Size-based Chromatography Technique for the Study of Living Cells April 22nd, 2014

Scientists Capture Ultrafast Snapshots of Light-Driven Superconductivity: X-rays reveal how rapidly vanishing 'charge stripes' may be behind laser-induced high-temperature superconductivity April 16th, 2014

Physics

A new key to unlocking the mysteries of physics? Quantum turbulence April 21st, 2014

Thinnest feasible membrane produced April 17th, 2014

Scientists Capture Ultrafast Snapshots of Light-Driven Superconductivity: X-rays reveal how rapidly vanishing 'charge stripes' may be behind laser-induced high-temperature superconductivity April 16th, 2014

Govt.-Legislation/Regulation/Funding/Policy

High-Performance, Low-Cost Ultracapacitors Built with Graphene and Carbon Nanotubes: Future devices based on technology could bridge gap between batteries and conventional capacitors in portable electronics and hybrid electric vehicles April 23rd, 2014

Guo Lab Shows Potential of RNA as Heat-resistant Polymer Material for Nanoarchitectures April 23rd, 2014

Cloaked DNA nanodevices survive pilot mission: Successful foray opens door to virus-like DNA nanodevices that could diagnose diseased tissues and manufacture drugs to treat them April 22nd, 2014

Berkeley Lab Researchers Demonstrate First Size-based Chromatography Technique for the Study of Living Cells April 22nd, 2014

Nanomedicine

Study finds long-term survival of human neural stem cells transplanted into primate brain April 23rd, 2014

Cloaked DNA nanodevices survive pilot mission: Successful foray opens door to virus-like DNA nanodevices that could diagnose diseased tissues and manufacture drugs to treat them April 22nd, 2014

Berkeley Lab Researchers Demonstrate First Size-based Chromatography Technique for the Study of Living Cells April 22nd, 2014

Amino-functionalized carbon nanotubes act as a carrier for nerve growth factor April 21st, 2014

Discoveries

Study finds long-term survival of human neural stem cells transplanted into primate brain April 23rd, 2014

High-Performance, Low-Cost Ultracapacitors Built with Graphene and Carbon Nanotubes: Future devices based on technology could bridge gap between batteries and conventional capacitors in portable electronics and hybrid electric vehicles April 23rd, 2014

Guo Lab Shows Potential of RNA as Heat-resistant Polymer Material for Nanoarchitectures April 23rd, 2014

Berkeley Lab Researchers Demonstrate First Size-based Chromatography Technique for the Study of Living Cells April 22nd, 2014

Announcements

Study finds long-term survival of human neural stem cells transplanted into primate brain April 23rd, 2014

High-Performance, Low-Cost Ultracapacitors Built with Graphene and Carbon Nanotubes: Future devices based on technology could bridge gap between batteries and conventional capacitors in portable electronics and hybrid electric vehicles April 23rd, 2014

Guo Lab Shows Potential of RNA as Heat-resistant Polymer Material for Nanoarchitectures April 23rd, 2014

National Space Society Congratulates SpaceX on the Success of CRS-3 and the First Flight of the Falcon 9R April 22nd, 2014

Photonics/Optics/Lasers

High-temperature plasmonics eyed for solar, computer innovation April 17th, 2014

Scientists Capture Ultrafast Snapshots of Light-Driven Superconductivity: X-rays reveal how rapidly vanishing 'charge stripes' may be behind laser-induced high-temperature superconductivity April 16th, 2014

Lumerical files a provisional patent that extends the standard eigenmode expansion propagation technique to better address waveguide component design. Lumerical’s EME propagation tool will address a wide set of waveguide applications in silicon photonics and integrated optics April 16th, 2014

Near-field Nanophotonics Workshop in Boston April 14th, 2014

NanoNews-Digest
The latest news from around the world, FREE







  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More














ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE