7
XRF
principle:
the
atoms
illuminated
by
high-energy
X-ray
emit
X-ray
spectra
with
a
certain
characteristics,
the
wavelength
of
which
is
only
related
to
the
atomic
number
of
element,
not
X-ray
excitation
energy.
Therefore,
by
determine
the
wavelength,
we
find
what
contained
in
the
sample
and
start
the
qualitative
analysis;
by
measuring
the
line
intensity
and
comparing
with
a
known
standard,
we
know
the
content
of
the
element
and
start
the
quantitative
analysis.
Explorer
-
7000
working
principle:
Integrated
miniature
X-ray
source
provides
tube
voltage
and
tube
current,
the
light
tube
emits
continuous
X-spectral
lines,
X-rays
irradiating
to
the
sample
produce
X-ray
fluorescence
with
sample
characteristics,
transforming
into
voltage
signals
through
the
detector,
the
signal,after
being
amplified
and
data
acquisition,
is
sent
for
computer
processing
to
get
the
required
test
data.
2.3
System
Components
The
instrument
is
constructed
mainly
by
three
systems:
excitation
system,
optics
system
and
detection
system.
2.3.1
Excitation
System
The
excitation
system,
including
miniature
X-ray
source,
filter
and
collimator,
is
used
to
generate
X-rays.
2.3.2
Optics
System
Here
is
the
schematic
diagram
of
optics
system.
Fig.2-6
Switch the combination of filter and collimator by software.
2.3.3 Detection System
Mainly include:
1)
AMP and digital multi-channel data acquisition system - Get the signal and digitalize it
by amplifying the counter.
2)
Embedded PDA - Equipped with dedicated X-ray fluorescence analytical software, it can
control the instrument operations, process info. and display results.
Содержание Explorer-9000
Страница 1: ...Explorer 9000 User Manual ...