Main subjects are:
These topics are sketched in a bit more detail below
Linear high frequency accelerators for protons and ions
The concepts of the KONUS and EQUUS /1,2/ beam dynamics were developed. They allow for new drift tube accelerator designs resulting in compact and efficient ion acceleration.
New welding and production techniques as well as new magnet technologies and RF drive integration into the cavity will allow for a new boost in linear accelerator layout. The new technologies have to be analysed and transferred into the world of accelerators.
A special topic is the radio frequency quadrupole RFQ development. At present, a first 325 MHz RFQ of the 4-Rod type for proton acceleration is under construction and will be RF power and beam tested during the coming years.
End field investigations result in better matching in and out of the beam /3/.
The working group is offering state of the art simulation tools and is developing and improving own simulation tools where necessary.
Ion beam diagnostics
The ion beam has to be characterized in 6 - dimensional phase space, and for an increasingly wide range of beam current and energy levels. This affords new measurement techniques. Our group began the application of mini-cameras for that purpose /4/. In general destruction free techniques are a main focus of our activities.
Construction of the in house neutron source FRANZ
Small neutron sources for research are of increasing interest as some of the existing research reactors will be shut down in near future. FRANZ is based on a 2 MeV proton beam which will generate neutrons by the (p,n) reaction on a 7Li target /5/. Main features are the neutron energy spectrum and the 250 kHz /1 ns pulse specrum which enables diferential neutron capture cross section measurements as needed in nuclear astrophysics or in material research for fusion reactors etc.
At present, beam development from the ion source down to the neutron production target is underway.
|Fig.: Beam line from the ion source to the 2 MV RF accelerator.