Diamond Light Source Cryogenic Undulator

Insertion devices

With now about 20 insertion devices installed at customers sites Danfysik has proved its capability as a world leading supplier of high performance Insertion Devices for Synchrotron Light Sources.

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Diamond Light Source Cryogenic Undulator

Description

Danfysik is presently constructing a Cryogenic in-vacuum hybrid Undulator for the Diamond Light Source, United Kingdom

Data

Specifications
Configuration:
Cryogenic - In-vacuum - Hybrid
Period length:
17.7 mm
Gap range:
4 - 30 mm
Magnetic length of the device:
2000 mm
Effective K value at 5mm gap
(150degK) 1,7

Cryogenic in-vacuum hybrid Undulator for Diamond Light Source, United Kingdom

Project start 2008. Project completion 2009.

Danfysik is presently building the Cryogenic Permanent Undulator U17.7 for the Diamond Light Source, UK. With this remarkable project Danfysik underlines our position as market leader in permanent magnet based insertion devices, including next generation cryogenic devices.

The scope of the DLS contract includes magnetic calculations, mechanical design, manufacture as well as detailed in-situ (i.e. while cold and under vacuum) magnetic measurement of the device.

The design of the 17.7 mm period cryogenic hybrid undulator with 113 periods has been done using RADIA and demagnetization studies using TOSCA 3D

Specification of the Cryogenic Undulator

Configuration	Cryogenic in-vacuum hybrid
Period length	17.7 mm
Gap range	4 - 30 mm
Magnetic length of the device	< 2050 mm
Number of full size poles	226
Magnet block material	NdFeB
Pole material	Vanadium Permendur
Effective K value at 5 mm gap, 150 K	1.7
Phase error at all gaps	£ 2.5°
Integrated skew and normal multipoles in the full gap range for \|x\| £ 10 mm:
Quadrupole	< 0.005 T
Sextupole	£ 0.50 T/m
Octupole	£ 50 T/m²
Horizontal and vertical field integrals in the full gap range for \|x\| £ 10 mm:
Normal First Field Integrals Skew First Field Integrals	£ ± 5 ^.10^-5 Tm £± 5 ^.10^-5 Tm
Normal Second Field Integrals Skew Second Field Integrals	£ ± 1^.10^-4 Tm² £ ± 1^.10^-4 Tm²
Hor. and vert. field integr. in the full gap range for 10 mm £ \|x\| £ 20 mm:
Normal First Field Integrals Skew First Field Integrals	£ ± 10 .10^-5 Tm £± 10 .10^-5 Tm
Normal Second Field Integrals Skew Second Field Integrals	£ ± 2^.10^-4 Tm² £ ± 2^.10^-4 Tm²