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Emission characteristics and electron optical properties of the ZrO/W point cathode
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Emission characteristics and electron optical properties of the ZrO/W point cathode
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http://www.ohsu.edu/xd/education/library/services/theses-dissertations/rights-statement.cfm
Title
Emission
characteristics
and
electron
optical
properties
of the
ZrO/W
point
cathode
Creator.PersonalName
Tuggle
,
David
William
Thesis.Degree
Ph.D.
Thesis.Major
Applied Physics
Thesis.DateDegreeAwarded
June
1984
Institution
Oregon Graduate Center
Department
Dept. of Applied Physics
Thesis.Advisor/Mentor
Swanson, Lynwood W.
Thesis.Committee
Orloff, Jonathan H. (Jon)
Barofsky, Douglas F.
Elliott, Richard A.
Subject.LCSH
Electrons -- Emission
Electron beams
Zirconium
Tungsten
Call Number
Q183.5.OGC T831 1984
Description.Abstract
The
Zr/W
point
cathode
electron
source
is
a
high
brightness
,
low
noise
point
source
of
electrons
which
has been
used
in
several
electron
optical
systems
.
It
has the
capability
of
forming
a
high
current
,
narrow
cone
angle
focused
electron
beam
at a
relatively
large
working
distance
. In
particular
,
it
exceeds
the
performance
of the
LaB6
thermionic
cathode
, its
closest
competitor
, in
systems
where
a
sub-quarter
micron
,
several
nanoampere
electron
beam
is
required
. In
order
to
apply
this
emitter
to an
electron
optical
system
,
characteristics
such
as
angular
intensity
distribution
,
beam
energy
spread
,
beam
noise
,
I-V
curves
,
electron
gun
transmission
and
virtual
source
size
should be
known
as a
function
of
emitter
radius
,
current
density
,
temperature
and
other
variable
parameters
. The
present
work
covers
all
of the
above
characteristics
except
energy
spread
.
Experimental
data
,
theoretical
explanations
and
computer
simulations
are
included
.
Language
eng
Type
Text
Format.Use
Needs Adobe Acrobat Reader to view.
Format.FileType
pdf
Format.FileSize
4510.325 KB
OCLC number
13111195
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