302
13.
THE ACCELERATION OF IONS
potential across the condensers has risen to a suiciently high
value, the spark gaps (S) break down in succession, starting at
the transformer end, connecting the condensers in series. The
7
R
+
lg
ÎÇËMË%W ël >_
_
_
_
R
TIME
The Marx impulse generator.
voltage of the output is then the sum of the potential drops across -
the condensers, minus the losses in the spark gaps. One impulse is
generated each time the condensers discharge, usually once each
'
cycle. The rectifying tube (T) serves to make the impulses unidirectional.
The wave—form is shown at the right of the gure,
where the peak i_sreached within, say, one-half micro—second”. ?
,
and the slow discharge lasts for as much as one hundred
…
_
seconds.
Obviously, the values given can be varied over a wide
range by suitable choice of
‘
the circuit constants.
Peak
_
—
voltages as high as 2 Mev
“!
have been produced.
'
‘
"
'
'
'
13—5.
A.
C.
Type.—A
'
;É
single transformer capable of
!
raising the voltage from, say
_
_,
'
1,000 to 1,000,000
:
:
'
require such excellent 1nsu—
«
T
"
,'
lation between the
,
and secondary as to become
'
i
.
‘
costly and” ineicien—t. Onthe
FIGl3—10
transformers.
tranSformers
Whose
.
thePrlmafYoftransforme… S‘üpplied from & comparatwely10w
EaChtranSfŒmefmustbe1nsuîatedfrom groundfor 1tsresrectlve