Series Connected Hybrid for the Spallation Neutron Source
Figure 3. Vertical Section of the Series Connected Hybrid Magnet and Cryostat for the SNS.
The SCH for the Spallation Neutron Source is a collaborative effort with Johns Hopkins University, Massachusetts Institute of Technology and the SNS with the objective to develop technical specifications for the magnet, beam-line, and sample environment. Over a two-year period, the engineering design of the magnet system will be performed at the Magnet Lab and development of the user facility plan, science program and beam-line activities at Johns Hopkins, MIT and SNS, respectively.
This magnet system is similar in many respects to the SCH for the Magnet Lab, with the exception that the system is oriented horizontally for alignment with the beam-line and the warm bore is conical. The external helium refrigeration, superconducting outsert coil, quench protection, power system and cooling water system are all comparable or scaleable to the power demands of the insert.
With a conical bore, much less space is allotted for the resistive insert magnet. It will consist of two or three nested 20 kA coils that use a conical Florida-Bitter magnet technology to take advantage of the additional space at the mid-plane. A concept of this technology is shown in Figure 4. Included in this project is the prototyping of a conical Florida-Bitter coil that will be operated with a high background field.
Figure 4. Conical Florida-Bitter coil.
The technology developed for the lab’s 45 T Hybrid magnet has set the framework for the Series Connected Hybrids. Now an evolution of that design and the development of new features are allowing the creation of new instruments for high field NMR, chemical and biological research and neutron scattering experiments.
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For more information, please contact Iain Dixon at dixon@magnet.fsu.edu or (850) 644-7653.
