ASTM B713-82(1997)e1

Standard Terminology Relating to Superconductors (Withdrawn 2001)

General Information

• Status: Withdrawn
• Publication Date: 31-Dec-1996
• Withdrawal Date: 09-Mar-2001
• ICS: 01.040.29 - Electrical engineering (Vocabularies)
• ICS: 29.050 - Superconductivity and conducting materials
• Technical Committee: B01 - Electrical Conductors

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn. Contact ASTM International (www.astm.org) for the latest information.
e1
Designation: B 713 – 82 (Reapproved 1997)
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Terminology Relating to
Superconductors
This standard is issued under the fixed designation B 713; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
e NOTE—Editorial changes were made throughout in March 1997.
Note—The designation after the definition indicates that the definition is either taken directly from the Compilation of ASTM
Standard Definitions, and cites the standard in which it is used (for example, D2864) and the committee with jurisdiction (for
example, D-27), or if new, it is designated B713, B-1.
1. Referenced Documents braid, n—a narrow tubular or flat fabric produced by inter-
twining strands of materials according to a definite pattern.
1.1 ASTM Standards:
D 123, D-13
A 340 Terminology of Symbols and Definitions Relating to
cable (concentric lay conductor)—conductor constructed
Magnetic Testing
with a central core surrounded by one or more layers of
B 354 Terminology Relating to Uninsulated Metallic Elec-
3 helically laid wires.
trical Conductors
B 374 Terminology Relating to Electroplating
DISCUSSION—Several types of cables (concentric lay conductors) are
D 123 Terminology Relating to Textiles
compact round, conventional concentric, equilay, parallel core, rope-
lay, unidirectional, and unilay, as follows:
D 1356 Terminology Relating to Sampling and Analysis of
Atmospheres
conductor, compact round—a conductor constructed with a
D 2864 Terminology Relating to Electrical Insulating Liq-
central core surrounded by one or more layers of helically
uids and Gases
laid wires and formed into final shape by rolling, drawing, or
E 7 Terminology Relating to Metallography
other means.
E 41 Terminology Relating to Conditioning
conductor, conventional concentric—conductor constructed
E 269 Definitions of Terms Relating to Magnetic Particle
with a round central core surrounded by one or more layers
Inspection
of helically laid round wires. The direction of lay is reversed
F 17 Terminology Relating to Flexible Barrier Materials
in successive layers, and generally with an increase in length
F 303 Practices for Sampling Aerospace Fluids from Com-
of lay for successive layers.
ponents
conductor, equilay—conductor constructed with a central core
surrounded by more than one layer of helically laid wires, all
2. Terminology
layers having a common length of lay, direction of lay being
aspect ratio—ratio of the longer to the shorter transverse
reversed in successive layers.
dimensions of a rectangular composite superconductor.
conductor, parallel core—conductor constructed with a cen-
B 713, B-1
tral core of parallel-laid wires surrounded by one layer of
barrier—any material limiting passage through itself of solids,
helically laid wires.
liquids, semisolids, gases, or forms of energy such as
conductor, rope-lay—conductor constructed of a bunch-
ultraviolet light. F 17, F-2
stranded or a concentric-stranded member or members, as a
central core, around which are laid one or more helical layers
of such members.
conductor, unidirectional—conductor constructed with a cen-
This terminology is under the jurisdiction of ASTM Committee B-1 on
Electrical Conductors and is the direct responsibility of Subcommittee B01.08 on
tral core surrounded by more than one layer of helically laid
Superconductors.
wires, all layers having a common direction of lay, with
Current edition approved Dec. 31, 1982. Published February 1983.
increase in length of lay for each successive layer.
A nnual Book of ASTM Standards, Vol 03.04.
Annual Book of ASTM Standards, Vol 02.03.
conductor, unilay—conductor constructed with a central core
Annual Book of ASTM Standards, Vol 02.05.
surrounded by more than one layer of helically laid wires, all
Annual Book of ASTM Standards, Vol 07.01.
6 layers having a common length and direction of lay.
Annual Book of ASTM Standards, Vol 11.03.
B 354, B-1
Annual Book of ASTM Standards, Vol 10.03.
Annual Book of ASTM Standards, Vol 03.01.
component—an individual piece or a complete assembly of
Annual Book of ASTM Standards, Vol 14.02.
individual pieces. F 303, F-7
Discontinued; see 1990 Annual Book of ASTM Standards, Vol 03.03.
composite conductor—a conductor consisting of two or more
Annual Book of ASTM Standards, Vol 15.09.
Annual Book of ASTM Standards, Vol 15.03. types of material, each type of material being plain, clad, or
B 713
coated, and assembled together to operate mechanically and magnetic field strength—the measured intensity of a
electrically as a single conductor. B 713, B-1 magnetic field at a point, usually expressed in oersteds or
composite superconductor—a conductor incorporating super- amperes per metre. E 269, E-7
conductive material. magnetic flux, F—the product of the magnetic induction, B,
and the area of a surface (or cross section), A, when the
DISCUSSION—Some types of composite superconductors are compos-
magnetic induction B is uniformly distributed and normal to
ite conductor, coreless, tape, tubular, and hollow, as follows:
the plane of the surface.
conductor, composite—see composite conductor.
F5 BA
conductor, coreless—a conductor constructed of one or more
layers of helically laid wires and formed into final shape by
where:
F5 magnetic flux,
rolling, drawing, or other means.
B 5 magnetic induction, and
conductor, tape—a conductor constructed in the form of a flat
A 5 area of the surface.
ribbon or strip.
conductor, tubular—a conductor constructed in the form of a
NOTE 2—If the magnetic induction is not uniformly distributed over the
tube.
surface, the flux, F, is the surface integral of the normal component of B
conductor, hollow (also tubular conductor)—a conductor in
over the area.
which the individual elements are disposed about one or
F5 B·dA
more hollow passages, the direction of which is along the ** s
axial length of the conductor. B 713, B-1
NOTE 3—Magnetic flux is a scalar and has no direction. A 340,
composition—the quantity of each of the components of a
A-6
mixture; usually expressed in terms of the weight percent-
magnetic flux jump—the collective, discontinuous motion of
age, or the atomic percentage of each of the components in
magnetic flux lines in a superconductor, produced by
the mixture. E 7, E-4
mechanical, thermal, magnetic, or electrical disturbances.
conductivity, electrical—the ratio of the current density car-
B 713, B-1
ried through a specimen to the potential gradient paralleling
magnetic flux pinni
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