This ring is one of the first of the 3rd generation light sources. The synchrotron light is thus mainly emitted by insertion devices, wigglers and undulators, placed in long straight sections. The ring design was initially focused on the Vacuum Ultraviolet and soft X-ray region and four undulators are now installed in the ring operating in these regions.
As the need of intense harder X-rays increased, multipole superconducting wigglers with cold bores of a novel type were constructed at MAX-lab. These devices opened up the harder X-ray spectral region and this type of wigglers are now commercially available and can be found at several other laboratories.
3rd generation sources are high-performing and expensive. Several tricks were played at MAX-lab to design a high performance, low cost machine. Some novel features, at that time, could be mentioned:
- Finite dispersion in the straight sections to reduce the electron beam emittance.
- Landau cavities, increasing the beam life-time to allow for a low energy (cheap) injector. These Landau cavities are also hampering the coupled bunch instabilities.
- A new magnet girder system, allowing for a precise magnet alignment.
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Circumference (m)
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90
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Injection energy (MeV)
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400
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Operating energy (MeV)
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1500
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Maximum stored current (mA)
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280
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Electron beam life-time (Ah)
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4@5% coupling
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Horizontal emittance (nm rad)
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9
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Coupling (%)
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0.1-5
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Nr of straight sections
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10
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One tenth of the MAX II ring.
