Sponsor: SLAC
PI: Soren Prestemon
Date:
STATEMENT OF WORK
Superconducting Undulator Research and Development
Background
The development of superconducting undulators will have a significant impact on
the performance reach of future Free Electron Lasers, and is a critical development
in support of future FEL facilities at SLAC National Accelerator Laboratory (SLAC). A
fast-track R&D project has been formulated, coordinating expertise at Argonne
National Laboratory (ANL), Lawrence Berkeley National Laboratory (LBNL), and
SLAC. The project has as overall scope the following components:
 A 1.5m NbTi-based superconducting undulator (SCU), to be designed and
fabricated at ANL;
 A 1.5m Nb3Sn-based SCU, to be designed and fabricated at LBNL;
 A 2-m test cryostat to be designed and fabricated by ANL;
 Development and implementation of a tuning method to be implemented on
both SCU devices, under the purview of LBNL;
 Testing of both SCU’s at ANL, with tuning and measurement support from
LBNL.
The project funding comes from the three DOE laboratories ANL, LBNL, and SLAC.
Here we outline the scope of work to be performed at LBNL with funds (totaling
500k$) contributed from SLAC:
1. Design and fabrication of a 1.5m Nb3Sn-based SCU
2. Participation in testing of the SCU prototypes at ANL, and lead the field
tuning of both devices at ANL.
Technical tasks
Task 1: Design and fabrication of a 1.5m Nb3Sn-based SCU
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Develop optimized coil and pole geometry;
Develop optimized ends to minimize active end trajectory corrections;
Develop CAD model and drawings for undulator yoke fabrication
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Develop CAD model and drawings for associated tooling: winding, heattreatment, and vacuum impregnation;
Develop CAD model and drawings for undulator support structure
Oversee procurement/fabrication of all hardware;
Perform coil winding of each undulator-half using existing in-house winding
machine;
Perform heat-treatment of each undulator-half using existing in-house
furnace;
Prepare reacted undulator-halves for potting: install voltage taps, joints to
superconducting leads;
Perform vacuum impregnation of undulator-halves;
Assemble two undulator-halves into final undulator and prepare for testing.
Task 2: Participation in testing of the SCU prototypes at ANL, and lead the field tuning
of both devices at ANL
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Develop pulsed-wire measurement system for incorporation into ANL testcryostat;
o Procurement of measurement system components;
o Coordination of system interfaces with ANL test cryostat design;
Coordination of field tuning system requirements with ANL test cryostat;
Oversee pulsed-wire-component of undulator testing at ANL;
Lead field tuning of NbTi and Nb3Sn SCU prototypes at ANL.
Reports, data, and other Deliverables:
Major project deliverables include:
- Detailed report detailing the design of the undulator;
- Detailed report of component tolerances: requested, received, and final asbuilt;
- A complete 1.5m Nb3Sn undulator “cold-mass”;
- A detailed report of the magnetic measurements and field tuning of the NbTi
and Nb3Sn undulators.
We note that the project is being managed by SLAC, and that all design, fabrication
and testing data will be available to all members of the collaboration team
throughout the project.