Permanent Magentic Undulators
The use of permanent magnets for undulator and wiggler construction dates back to the very first undulator described by Motz in 1953.
Compared to electromagnets and excluding the superconducting option, the permanent magnet solution is the preferred choice for short period undulators. Their only limitation is the maximum field achievable which can be easily doubled in case of a superconducting option. On the other hand they do not require coils, cooling and power supplies making them a rather economically attractive solution.
BNG is closely collaborating with DESY since 2006 on the design and fabrication of the undulators for X-FEL, FLASH and PETRA III. Recently we delivered 11 undulators in 11 months for the PETRA III project.
Fabrication of 11 Undulators for the PETRA III and FLASH Projects
PETRA III: DESY, Deutsches Elektronen-Synchrotron, Hamburg In 2009, PETRA III will take up operation as one of the most brilliant storage ring-based X-ray radiation sources worldwide. The installation of several specially adapted undulators delivering X-ray radiation of an exceptionally high brilliance guarantees excellent research opportunities – ranging from the investigation of new materials to molecular biology and medicine – for users from around the world. FLASH is a free-electron laser at DESY which was commissioned in 2004 and has been used for experiments with short-wavelength ultraviolet radiation and soft X-rays since 2005. The 260-metre-long facility is the world’s first light source to deliver laser radiation in the soft X-ray range with high peak brilliance and ultra-short light pulses. FLASH will remain unrivalled worldwide until the LCLS X-ray laser starts up in California in 2009. Babcock Noell received manufactured and delivered within 11 months 11 undulator units with a length of 2m each.
Specifications: |
Customers:| Weight: | ca. 5 t | |
| Length: | 2 m | |
| Variation of the gap height: | 10 -200 mm with a precision and reproducibility of 1 µm |
