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Michael Pedersen
+45 72202351
SLS In-Vacuum Undulator for SLS
Description
Danfysik has made the a 19 mm period length in-vacuum hybrid undulator with 5 mm minimum gap for the Swiss Light Source at Paul Scherrer Institute (PSI), Villigen, Switzerland.
Data
Configuration
Hybrid, AsymmetricPeriod length
19.00 mmGap range
4 - 40 mmMagnetic length of the device
1903 mmEffective field at 5 mm gap (minimum gap)
0.86 TEffective K value
1.53
In-Vacuum Hybrid Undulator with 19mm period for Swiss Light Source
Project start 2003. Project completion 2004.
In-Vacuum Hybrid Undulator with 19mm period for Swiss Light Source.
A 19 mm period in-vacuum hybrid undulator has been designed and built for the Swiss Light Source at PSI in Switzerland. The device is optimized for use down to 5 mm gap but allows operation down to a gap of 4 mm at a pressure of 2∙10-10 mbar in the vacuum chamber. The hybrid design is made with magnetically soft iron poles of ARMCO steel that are very cost efficient compared to Vanadium Permendur and the magnetic blocks are made of Sm2Co17 because of its high resistively with respect to radiation damage. The poles are 44 mm wide to minimize the field roll-off and guarantee a conservative 40 mm wide good field region.
Gerhard Ingold at the SLS is pleased with the device commends the Danfysik have “built a high performance undulator” and he considers out that it is a particular achievement that the device can be used down to 4 mm gap. The device has been installed at the SLS and works perfectly.
A clean room with filtered air intake, air lock access with overpressure and the temperature control has been built at Danfysik for the handling of in-vacuum devices.
