Title:
粒子加速のための磁場生成方法、磁石構造体及びその製造方法
Document Type and Number:
Japanese Patent JP5481070
Kind Code:
B2
Abstract:
A magnet structure for particle acceleration includes at least two coils that include a continuous path of superconducting material (e.g. niobium tin (Nb3Sn) having an A15-type crystal structure) for electric current flow there through. The coils can be mounted in a bobbin, which together with the coils form a cold-mass structure. The coils are cooled to their superconducting temperatures via cryocoolers. Radial-tension members are coupled with the cold-mass structure to keep it centered, such that it remains substantially symmetrical about a central axis and is not pulled out of alignment by magnetic forces acting thereon. A wire can be wrapped around the coils, and a voltage can be applied thereto to quench the coils to prevent their operation of the coils in a partially superconducting condition, which may otherwise cause damage thereto. A magnetic yoke surrounds the cold-mass structure and includes a pair of poles that, in part, define an acceleration chamber there between. The inner surfaces of the poles have tapered profiles that establish a correct weak focusing requirement and that provide phase stability for ion acceleration and that reduce pole diameter by increasing energy gain versus radius. An integral magnetic shield is positioned about the yoke to contain magnetic fields emanating there from and can have a tortuous configuration to contain magnetic fields having a variety of orientations. The magnet structure can be very compact and can produce particularly high magnetic fields.
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Inventors:
Antaya, Timothy A.
Radbinski, Alexey El.
Schulz, Joel Henry
Titus, Peter H.
Smith, Bradford A.
Bromberg, Leslie
Radbinski, Alexey El.
Schulz, Joel Henry
Titus, Peter H.
Smith, Bradford A.
Bromberg, Leslie
Application Number:
JP2008551427A
Publication Date:
April 23, 2014
Filing Date:
January 19, 2007
Export Citation:
Assignee:
MASSACHUSETTS INSTITUTE OF TECHNOLOGY
International Classes:
H05H7/04; H01F6/00; H01F6/04; H05H13/00; H05H13/02
Foreign References:
| US3868522 | ||||
| US3925676 | ||||
| US3958327 |
Other References:
Bigham C. B,,Magetic trim rods for superconducting cyclotrons,Nuclear Instruments and Methods,スウェーデン,North-Holland Publishing Co.,1975年,Vol. 131, No. 2,page 223-228
Attorney, Agent or Firm:
Hidesaku Yamamoto
Takaaki Yasumura
Natsuki Morishita
Takaaki Yasumura
Natsuki Morishita