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- Path: senator-bedfellow.mit.edu!faqserv
- From: Robert F. Heeter <rfheeter@princeton.edu>
- Newsgroups: sci.physics.fusion,sci.answers,news.answers
- Subject: Conventional Fusion FAQ Glossary Part 21/26 (U)
- Supersedes: <fusion-faq/glossary/u_934543711@rtfm.mit.edu>
- Followup-To: sci.physics.fusion
- Date: 11 Nov 1999 12:26:27 GMT
- Organization: Princeton University
- Lines: 75
- Approved: news-answers-request@MIT.EDU
- Distribution: world
- Expires: 23 Feb 2000 12:24:17 GMT
- Message-ID: <fusion-faq/glossary/u_942323057@rtfm.mit.edu>
- References: <fusion-faq/glossary/intro_942323057@rtfm.mit.edu>
- Reply-To: rfheeter@pppl.gov
- NNTP-Posting-Host: penguin-lust.mit.edu
- Summary: Fusion energy represents a promising alternative to
- fossil fuels and nuclear fission for world energy
- production. This Glossary is a compendium of Frequently Used
- Terms in Plasma Physics and Fusion Energy Research. Refer
- to the FAQ on Conventional Fusion for more detailed info
- about topics in fusion research. This Glossary does NOT
- discuss unconventional forms of fusion (like Cold Fusion).
- X-Last-Updated: 1995/02/26
- Originator: faqserv@penguin-lust.MIT.EDU
- Xref: senator-bedfellow.mit.edu sci.physics.fusion:44269 sci.answers:10866 news.answers:170852
-
- Archive-name: fusion-faq/glossary/u
- Last-modified: 25-Feb-1995
- Posting-frequency: More-or-less-quarterly
- Disclaimer: While this section is still evolving, it should
- be useful to many people, and I encourage you to distribute
- it to anyone who might be interested (and willing to help!!!).
-
- ===============================================================
- Glossary Part 21: Terms beginning with "U"
-
- FREQUENTLY USED TERMS IN CONVENTIONAL FUSION RESEARCH
- AND PLASMA PHYSICS
-
- Edited by Robert F. Heeter, rfheeter@pppl.gov
-
- Guide to Categories:
-
- * = plasma/fusion/energy vocabulary
- & = basic physics vocabulary
- > = device type or machine name
- # = name of a constant or variable
- ! = scientists
- @ = acronym
- % = labs & political organizations
- $ = unit of measurement
-
- The list of Acknowledgements is in Part 0 (intro).
- ==================================================================
-
- UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU
-
- # u: variable commonly used for energy density of electric or
- magnetic fields; also sometimes used for velocity.
-
- @ UT, UTA: University of Texas at Austin; see entry
-
- @ UV: Ultraviolet (range of the electromagnetic spectrum)
-
- @ UW, UWM: University of Wisconsin at Madsion; see entry
-
- & Ultraviolet: Region of the electromagnetic spectrum
- intermediate between the visible and the x-ray portions.
- UV photons have energies greater than a few eV, but less
- than (roughly) 100 ev to 1 keV.
-
- * Unipolar Arc: Arc between a metal surface and a plasma in
- contact with it. Such an arc requires only one electrode
- and is maintained by the thermal energy of the electrons.
-
- & Universal gas constant: R = 8.314 x 10^7 ergs per
- degree C per mole.
-
- * Universal Instability: Low-frequency instability resulting
- from the presence of density gradients perpendicular to the
- magnetic field lines. An instability of this type is generally
- localized and usually has a small rate of growth.
-
- % University of Texas at Austin (UT): Among other things, UT has
- a large theoretical plasma physcs research center. (info, anyone?)
- The TEXT experimental tokamak is also located here.
-
- % University of Wisconsin at Madison: Among other facilities,
- "Wisconsin" has a large research program in both plasma physics
- and fusion engineering.
-
- * Upper Hybrid Waves: Similar to lower hybrid waves, but at a
- higher frequency. (more description?) Not truly propagating
- waves, but plasma oscillations. (?)
-
- & Uranium: (from Herman) A radioactive metallic element whose
- isotope, uranium-235, is a nuclear fission fuel. Plutonium,
- another fission fuel, can be produced from the more
- plentiful isotope uranium-238.
-
-
-