18WuD2x

162 cycling • Czochralski method
cycling The tendency of a parameter to oscillate
back and forth between two different values.
cyclogram A method of showing the relationship
between two signals on an oscilloscope. The two
signals must have a fixed phase relationship.
cyclotron A type of particle accelerator. An applied
electromagnetic field, acting together with an intense
applied magnetic field, cause charged subatomic
particles to travel with increasing velocity
in a spiral path between two semicircular metal
boxes called dees. When the particles go fast
enough in the correct path, they are expelled and
strike a target in their path.
Path of
accelerated
particles
cylindrical contour The most common curvature
of the face of a magnetic tape recording head; it is
a section of a cylinder having a constant radius of
0.5 inch to 1 inch.
cylindrical coordinate geometry A scheme for
robot-arm movement. There are three coordinates,
called reach, angle, and elevation. It allows
precise positioning of a robot end effector within a
region consisting of two concentric cylinders and
all the volume in between.
cylindrical coordinates A method of locating a
point in three-space in which height, distance,
and angle are used to uniquely define points.
h axis
Dee 1
Dee 2
P = (h, r,θ)
Deflector
Target
Hot
cathode
h r
θ
cylindrical coordinates
θ = 0
axis
cyclotron
cyclotron frequency The angular frequency of a
charged particle in a cyclotron. The cyclotron frequency
depends on the number of times per second
the magnetic field of the device is reversed.
cyclotron radiation An electromagnetic field produced
by the circular movement of charged particles
in a fluctuating magnetic field.
cylinder In computer operations, the combination
of equal-radius tracks on the platters of a hard
disk.
cylinder magnet A permanent magnet in the
shape of a cylinder.
cylindrical capacitor See CONCENTRIC CAPACI-
TOR.
cylindrical magnet See CYLINDER MAGNET.
cylindrical wave An electromagnetic wave whose
field surfaces are nearly perfect cylinders.
cylindrical waveguide A waveguide resembling a
round pipe.
cylindrical winding A method of coil winding in
which the wire is formed into a helix. There might
be only one layer, or there might be several layers.
The length of the coil is greater than the diameter.
Also called a linear winding.
Czochralski method A technique for obtaining a
relatively large single crystal from a substance,
such as the semiconductors germanium and silicon.
The method consists essentially of dipping a
seed crystal into a molten mass of the same substance,
then slowly withdrawing it while rotating it.