Title :
Design and Performance of Focusing Lenses for Installation Into Superconducting Cryomodules of a Proton Linac
Author :
Nicol, Thomas H. ; Sergatskov, Dmitri A. ; Tartaglia, Michael A. ; Terechkine, Iouri ; Tompkins, John C.
Author_Institution :
Fermi Nat. Accel. Lab., Batavia, IL, USA
fDate :
6/1/2011 12:00:00 AM
Abstract :
The high energy sections of the Fermilab HINS R&D proton linac will utilize superconducting spoke resonator (SSR) RF cavities. These will be assembled into cryomodules with strong solenoid focusing lenses closely interleaved with the cavities. A design for lenses has been made for the lower (SSR1) and higher (SSR2) energy ranges of the SSR-section. Prototype lenses for both SSR1 and SSR2 sections have been built and the SSR1 has been tested. Shielding is needed to reduce the solenoid fringe field on the cavity wall below the 10 μT level, and a preliminary design was built and tested with the SSR1 prototype lens. We discuss the design requirements and challenges, and the results from quench testing and magnetic measurements of the SSR1 prototype lens.
Keywords :
accelerator RF systems; accelerator cavities; accelerator magnets; linear accelerators; magnetic lenses; magnetic shielding; particle beam focusing; proton accelerators; superconducting magnets; superconducting resonators; Fermilab HINS R&D proton linac; SSR RF cavity; SSR-section; SSR1 prototype lens; cavity wall; design requirements; high energy sections; magnetic measurements; prototype lenses; quench testing; shielding; solenoid focusing lenses; solenoid fringe field; superconducting cryomodules; superconducting spoke resonator RF cavity; Coils; Focusing; Lenses; Linear particle accelerator; Magnetic shielding; Solenoids; Superconducting magnets; Accelerator magnet; cryomodule; magnetic shielding; solenoid; superconducting;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2010.2090331
