Accelerator
PETRA IV will be a fourth-generation synchrotron radiation source with which the principle of storage-ring-based light sources reaches its physical limit. It will be built in the existing 2300-metre ring tunnel of PETRA III, and the existing instruments and infrastructure will be partially recycled.
A significant conversion step
The existing electromagnets in the storage ring will be replaced by a larger number of permanent magnets. Around 4000 magnets are to be installed around the ring. This will also help to save energy because, unlike electromagnets, permanent magnets do not require any electric current to run.
By installing the new magnets, the experts have one main goal: The permanent magnets force the electrons bunches in the ring onto a much more precise circular path. Thanks to the more precise deflection, the electrons bunches will be held together much more tightly than before.
“The smaller electron bunches will emit X-rays that are much more narrowly focused, by a factor of 100 to 1000.”
PETRA IV Project Office
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