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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 22/26 (V)
- Supersedes: <fusion-faq/glossary/v_934543711@rtfm.mit.edu>
- Followup-To: sci.physics.fusion
- Date: 11 Nov 1999 12:26:31 GMT
- Organization: Princeton University
- Lines: 81
- Approved: news-answers-request@MIT.EDU
- Distribution: world
- Expires: 23 Feb 2000 12:24:17 GMT
- Message-ID: <fusion-faq/glossary/v_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:44270 sci.answers:10867 news.answers:170853
-
- Archive-name: fusion-faq/glossary/v
- 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 22: Terms beginning with "V"
-
- 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).
- ==================================================================
-
- VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV
-
- # v: variable typically used for velocity
-
- # V: variable typically used for electrical potential (Voltage)
-
- $ V: abbreviation for Volts; see entry
-
- @ VDE: Vertical Displacement Event
-
- & Vector:
-
- & Vector Notation:
-
- & Velocity: The rate of change of position with time for a given
- object.
-
- & Velocity Space: Mathematical space where each point corresponds
- not to a certain location in reality, but to a certain velocity.
- Distribution functions typically involve mixes of both position and
- velocity spaces. (See distribution function.) Contrast with
- "position space" where each point corresponds to a given location.
-
- & Velocity Space Instability: A class of instabilities driven
- by particle distributions (in velocity space) which are not
- in thermal equilibrium.
-
- * Vertical Field, Vertical Field Coils: See Poloidal Field / Coils.
-
- * Vertical Instability: [mostly by James Crotinger] A type of
- MHD (n=0) instability where the plasma drifts vertically upward.
- Nearly all tokamaks are vertically unstable (all highly shaped
- ones are). Controlling this instability is possible in many
- cases, and is an important facet of machine design. Vertical
- instabilities give rise to halo effects (see entry for halo).
-
- & Viscosity:
-
- * Vlasov Equation:
-
- * Voltage Loop: A wire which encircles the main axis of a tokamak
- in the vicinity of the vacuum vessel. The voltage induced in this
- loop during the shot is a measure of the ohmic heating voltage
- induced by transformer action and applied to the plasma.
-
- $ Volt: Unit of electrical potential.
-
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