1 - IAEA Nuclear Data Services
1 - IAEA Nuclear Data Services
1 - IAEA Nuclear Data Services
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k . Isochronous Cyclotron<br />
- 14 -<br />
i+,1. Development of the T.o.F. Spectrometer<br />
S. Cierjacks, H. Unseld, P. Forti, D. Kopsch, L. Kropp, J. Nebe<br />
During the period covered by this report the time-of-flight spectro<br />
meter worked for several operation periods of each about two weeks<br />
without serious breakdowns. In the past year several modifications of<br />
the apparatus were made C *\ J, By solving some material problems for<br />
the deflection systems which arise under conditions of increased beam<br />
intensities the overall reliability was further improved. Additionally<br />
the outer deflection plates in March 67 were set to the last remaining<br />
hill section of the pole faces. In this new position the much time<br />
consuming adjustment,which was necessary previously, could be<br />
avoided. For the 3 : 1 frequency divider a new phase stable electronic<br />
circuit which is in use since May 6?,'was constructed by members of the<br />
cyclotron laboratory.<br />
The application of a modified version of the AEG ion sources (concerning<br />
the material of some component's of the sources) now allows an operation of the<br />
cyclotron with an unreduced internal beam current of several hundred Ufu<br />
(these new sources were developed in the cyclotron laboratory too).<br />
In June 67 the CDC 3100 was equipped with an additional 8 U - 2k bit<br />
memory. With this extended storage capacity higher input rates (up to<br />
k C<br />
1.10 /sec for 8.000 time channels in the transmission experiments)<br />
or more data channels (mainly important for partial cross section measure<br />
ments) can be accepted with this new acquisiton system. For both de<br />
flection systems romótecontrolled deflection plates are under construction<br />
and are to be completed in the early 1968.<br />
As B result on the studies concerning the increase of the repetition rate<br />
a new concept has been worked out ¿~ 2 J'. With a meander shaped upper de<br />
flection plate of the outer deflector (used as strip~line) a considerable<br />
more economic system (from the power consideration point of view) could<br />
be realised. The use of such a deflection system may allow a power eco-
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