Path: senator-bedfellow.mit.edu!faqserv
From: Robert F. Heeter <
[email protected]>
Newsgroups: sci.physics.fusion,sci.answers,news.answers
Subject: Conventional Fusion FAQ Glossary Part 24/26 (X)
Supersedes: <fusion-faq/glossary/
[email protected]>
Followup-To: sci.physics.fusion
Date: 11 Nov 1999 12:26:39 GMT
Organization: Princeton University
Lines: 55
Approved:
[email protected]
Distribution: world
Expires: 23 Feb 2000 12:24:17 GMT
Message-ID: <fusion-faq/glossary/
[email protected]>
References: <fusion-faq/glossary/
[email protected]>
Reply-To:
[email protected]
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:
[email protected]
Xref: senator-bedfellow.mit.edu sci.physics.fusion:44272 sci.answers:10869 news.answers:170855
Archive-name: fusion-faq/glossary/x
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 24: Terms beginning with "X"
FREQUENTLY USED TERMS IN CONVENTIONAL FUSION RESEARCH
AND PLASMA PHYSICS
Edited by Robert F. Heeter,
[email protected]
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).
==================================================================
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
# Xe: Chemical symbol for the element Xenon.
* X-Point: Place where the poloidal magnetic field vanishes in such
a way that two flux surfaces appear to cross, e.g. where the main
plasma joins the divertor (see entry) or between magnetic islands.
Location where magnetic reconnection takes place. (See magnetic
reconnection; see also divertors and O-point.)
& X Ray: A penetrating form of electromagnetic radiation emitted
either when the inner orbital electrons of an excited atom
return to their normal state (characteristic x-rays), or when a
high speed electron collides sharply with an ion or atomic target
(bremsstrahlung). X-rays have energies from roughly 100 eV to
roughly 100 keV. (Below X-rays are ultraviolet rays, and above
X-rays in energy are gamma rays.) X-rays are (basically by
definition) non-nuclear in origin. (Nuclear electromagnetic
radiation termed gamma radiation.) See also ultraviolet, gamma
rays, bremsstrahlung.
