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基于通用设备和专用程序信号采集技术
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2010-09-08
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本文采用高速A/D采集技术,来进行信号处理的过程。
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第27卷第3期
2 O O
7年9月
核聚变与等离子体物理
Nuclear
Fusion
and
Plasma
Physics
、,01.27.No.3
Sep.2007
文章编号:0254“086(2007)03一0260一04
薹鬻霾鬣霎羹雾鬻冀羹羹羹雾羹羹冀
羹冀薹雾鬟雾羹冀
譬
襄,鬣冀蓊;馨薹羹i型冀薰I蓁霾鞲j蓁
鲻j鬻雾蓁
!嗽型翼薹警哆《型委锚:警萋l』lli:!
萋
蠢;篓蒙地羹
gure
l,
elec仃。一
magnetic
wave
in
TM
mode
is
simu
lated
bV
FDTD.
The
x一1,
FDTD
simulation
sDace
i
s
made
with
0.1
n1=400
cells
in
the
x
directi
on
and
0.1
m=400
cells
in
the
y
direction
respectively
.The cen
sizes
are
出=匆=0.00025m.The
time
step
is
ch
osen
as
4f=4x/2C.A
continuous
wave
so
urce
s of
E
neld
at
f.requency∞=吐p/√2
with
t
ime
mnction
E(f)=(1一e一删)sin
c谢is
placed
in f而nt
of
10ssless
LHMs,
where
n;_-一c№ln(0.01)/(
107c),c%p=2丁c×28.7
×10’.The
distance
from
the
Doint
s
ource
to
the
slab
is存O.0
1
m=40
cells
at
S=n
20,200
1.The
slab
is
“=0.02m=80△z
thick
in
x
directi
on
with
6=0.06m
=2404y
wide
in
y
direction.At
r
esonant行equency以
岛=一1
and胁=一1
accordingly,the
ea’e
ctiVe refractiVe
index
of
slab
is
men
giVen
as
”=一
√占r所=一1.
Figure
2
shows
the
elec仃ic
field
distribution
of
the
whole
calculating
domain.A
cle
ar
focusing
image
could
be
seen.Figure
3
shows
me
d
istribution
of
E,
at
2400
time.steps.Figure
4
sho
ws
the
maximum
am【plitude
of
electric
field
aIong
me
focusing
line
at
y=O.05m.The
maximum
amplitude
of
electric
field
in
the
middle
of
LHMs
is
0.366
V·In_1
re
1ative
to
the
source
amplitude
4s=lV·m一1,whi
ch
is
quite
di腑rent
from
a
convex
lens
focus
that
based
on
equation(5).
Figure
5
shows
the
amplitude
of
pow
er
along
the
focusing
line
at
y=0.05m
which
is
also
difrerent
f.rom
the
one
of
convex
1ens.
X
Axis《△帕
FigⅢ.c
2
Electric
field dis订ibution
in
the
calculating
domain
Figure
3
Distribution
of
Ez
at
2400
tiTne-st印s
.0-
姻·
X8一
).7-
,.&
,.5.
’.4.
》.孓
弛≯
D.1.
1…
/n\.
10
Figure
4
Amplitude
of
electric
6led
along)50.05m
.O-
X8一
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