Welcome to DU!
The truly grassroots left-of-center political community where regular people, not algorithms, drive the discussions and set the standards.
Join the community:
Create a free account
Support DU (and get rid of ads!):
Become a Star Member
Latest Breaking News
General Discussion
The DU Lounge
All Forums
Issue Forums
Culture Forums
Alliance Forums
Region Forums
Support Forums
Help & Search
Environment & Energy
Related: About this forumSimulations uncover obstacle to harnessing laser-driven fusion
https://www.osc.edu/press/simulations-uncover-obstacle-to-harnessing-laser-driven-fusion[font face=Serif][font size=5]Simulations uncover obstacle to harnessing laser-driven fusion[/font]
[font size=4]Under realistic conditions, hollow cones fail to guide energetic electrons to fuel[/font]
[font size=3]A once-promising approach for using next-generation, ultra-intense lasers to help deliver commercially viable fusion energy has been brought into serious question by new experimental results and first-of-a-kind simulations of laser-plasma interaction.
Researchers at The Ohio State University are evaluating a two-stage process in which a pellet of fusion fuel is first crushed by lasers on all sides, shrinking the pellet to dozens of times its original size, followed by an ultra-intense burst of laser light to ignite a chain reaction. This two-stage approach is called Fast Ignition, and there are a few variants on the theme.
In a recent paper, the Ohio State research group considered the long-discussed possibility of using a hollow cone to maintain a channel for the ultra-intense ignitor pulse to focus laser energy on the compressed pellet core. Drawing on both experimental results from studies at the Titan Laser at Lawrence Livermore National Laboratory in California, and massively-parallel computer simulations of the laser-target interaction performed at the Ohio Supercomputer Center (OSC) in Columbus, Ohio, the research team found compelling evidence that the cone-guided approach to Fast Ignition has a serious flaw.
In the history of fusion research, two-steps-forward and one-step-back stories are a common theme, said Chris Orban, Ph.D., a researcher of the High Energy Density Physics research group at Ohio State and the lead theorist on the project. But sometimes progress is about seeing whats not going to work, just as much as it is looking forward to the next big idea.
[/font][/font]
http://dx.doi.org/10.1103/PhysRevE.86.065402[font size=4]Under realistic conditions, hollow cones fail to guide energetic electrons to fuel[/font]
[font size=3]A once-promising approach for using next-generation, ultra-intense lasers to help deliver commercially viable fusion energy has been brought into serious question by new experimental results and first-of-a-kind simulations of laser-plasma interaction.
Researchers at The Ohio State University are evaluating a two-stage process in which a pellet of fusion fuel is first crushed by lasers on all sides, shrinking the pellet to dozens of times its original size, followed by an ultra-intense burst of laser light to ignite a chain reaction. This two-stage approach is called Fast Ignition, and there are a few variants on the theme.
In a recent paper, the Ohio State research group considered the long-discussed possibility of using a hollow cone to maintain a channel for the ultra-intense ignitor pulse to focus laser energy on the compressed pellet core. Drawing on both experimental results from studies at the Titan Laser at Lawrence Livermore National Laboratory in California, and massively-parallel computer simulations of the laser-target interaction performed at the Ohio Supercomputer Center (OSC) in Columbus, Ohio, the research team found compelling evidence that the cone-guided approach to Fast Ignition has a serious flaw.
In the history of fusion research, two-steps-forward and one-step-back stories are a common theme, said Chris Orban, Ph.D., a researcher of the High Energy Density Physics research group at Ohio State and the lead theorist on the project. But sometimes progress is about seeing whats not going to work, just as much as it is looking forward to the next big idea.
[/font][/font]
InfoView thread info, including edit history
TrashPut this thread in your Trash Can (My DU » Trash Can)
BookmarkAdd this thread to your Bookmarks (My DU » Bookmarks)
2 replies, 650 views
ShareGet links to this post and/or share on social media
AlertAlert this post for a rule violation
PowersThere are no powers you can use on this post
EditCannot edit other people's posts
ReplyReply to this post
EditCannot edit other people's posts
Rec (0)
ReplyReply to this post
2 replies
= new reply since forum marked as read
Highlight:
NoneDon't highlight anything
5 newestHighlight 5 most recent replies
Simulations uncover obstacle to harnessing laser-driven fusion (Original Post)
OKIsItJustMe
Mar 2013
OP
eppur_se_muova
(36,289 posts)1. "shrinking the pellet to dozens of times its original size"
Science journalism at its best.
hunter
(38,326 posts)2. I think high school science teachers get paid more than honest science journalists these days.
But the right wing plutocrats are working on that too.