insertion devices and magnets groupj a clarke, daresbury laboratory undulators and wigglers for...
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Insertion Devices and Magnets Group J A Clarke, Daresbury Laboratory
Undulators and Wigglers for Future
Linear CollidersJim Clarke
ASTeCDaresbury Laboratory
12th June 2002
Insertion Devices and Magnets Group J A Clarke, Daresbury Laboratory
Experience at Daresbury
Many years in Insertion Devices One of the first undulators ever built Superconducting Wigglers High Field Permanent Magnet
Wigglers PM Helical Undulators for Storage
Rings and FELs Magnet Design and Assembly,
Mechanical Engineering, Magnet Testing
Insertion Devices and Magnets Group J A Clarke, Daresbury Laboratory
Recent Projects
2.4 T Hybrid PM Wiggler for SRS
Planar Helical Undulator for SRS & DIAMOND
Helical Undulator for FEL
Insertion Devices and Magnets Group J A Clarke, Daresbury Laboratory
Polarised Positron Source
• We have recently agreed with TESLA that we will design the helical undulator for their polarised positron source
• This will be a ~100 m, short period device (~12 mm) which will use the 250 GeV electron beam to generate ~20 MeV circularly polarised photons.
Insertion Devices and Magnets Group J A Clarke, Daresbury Laboratory
Present TESLA Layout
Insertion Devices and Magnets Group J A Clarke, Daresbury Laboratory
Existing Design
Superconducting Double Helix with Iron
(Floettmann)
Insertion Devices and Magnets Group J A Clarke, Daresbury Laboratory
Project Plan• Phase 1 (~ 9 - 12 months)
Review Basic Specification Compare Alternative Solutions Assess Engineering Feasibility Make Recommendations for Phase 2
• Phase 2 (~ 12 - 15 months) Detailed Magnetic and Engineering Design Construct Prototype
• Phase 3 (~ 6 - 12 months) Detailed Test and Measurement in Lab Tests with Beam (?)
Insertion Devices and Magnets Group J A Clarke, Daresbury Laboratory
Wigglers
• Damping Rings require many meters of high field wigglers (10’s to 100’s)
• We have designed some of the highest field strength permanent magnet wigglers in the world - much higher than is presently being considered by NLC
• These may provide a more cost effective solution