
45-16 Optical
minimizing cross talk and improving resolution. e overall light amplication achieved is of the order
of 10
4
, and higher gains can be achieved by stacking multiple MCPs and by increasing the accelerating
vo
ltages
. e MC
P
ha
s
a no
nlinear
re
sponse,
be
cause
th
e
cu
rrent
de
nsity
in
creases
at an ex
ponential
ra
te
un
til
li
mited
by sa
turation
. e II
T
ca
n
be ga
ted
in on
ly
a fe
w
na
noseconds
by pu
lsing
th
e
ca
thode
po
tential
fr
om
th
e
cu
to
le
vel
(a fe
w
vo
lts
po
sitive)
to th
e
no
rmal
op
erating
vo
ltage
. i
s
pr
ovides
a
hi
gh-speed
sh
utter
ca
pability
fo
r
sto
pping
mo
tion
as we
ll
as a me
ans
of ex
posure
co
ntrol
. Ge
neration
II
de
vices
ha
ve
hi
gh
ga
in ...