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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Ticos, C.M. Wang, Z. Wurden, G.A. |
| Copyright Year | 2007 |
| Description | Author affiliation: Los Alamos Nat. Lab., Los Alamos (Ticos, C.M.; Wang, Z.; Wurden, G.A.) |
| Abstract | Summary form only given. A shower of 50-mum-diameter carbon dust grains has been accelerated to speeds up to 6 km/s in laboratory for the first time. A coaxial plasma gun is used for dust acceleration. A distinctive feature of this plasma accelerator is that it can use any gas and can operate with microparticles having any shape. Deuterium gas and carbon dust is chosen to be compatible with fusion plasmas as a diagnostic tool. The measured voltages and discharge currents of the plasma gun are up to 10 kV and 230 kA, respectively. The plasma ejected from the gun bv JxB forces at speeds of about 28 km/s is well collimated for a distance of about 2 m. A hydrodynamic model, as well as a direct collision model which accounts for direct collisions of ions with the grains, is used to explain the dust acceleration. The drag force depends on the ratio of the plasma density to the dust material density. The plasma density and the electron and ion temperatures in the models are of the order of $10^{19}$ $m^{-3},$ and about 1 eV, respectively. Possible applications of hypervelocity dust are studies of dust-plasma interaction and magnetic field mapping in fusion plasmas. |
| Starting Page | 689 |
| Ending Page | 689 |
| File Size | 33853 |
| Page Count | 1 |
| File Format | |
| ISBN | 9781424409150 |
| ISSN | 07309244 |
| DOI | 10.1109/PPPS.2007.4345995 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2007-06-17 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Storms Coaxial components Dusty plasma Plasma accelerators Plasma measurements Plasma diagnostics Acceleration Plasma density Plasma temperature Laboratories |
| Content Type | Text |
| Resource Type | Article |
| Subject | Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering |
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