| 发明名称 | Focusing a particle beam | ||
| 摘要 | An example particle accelerator includes the following: a resonant cavity in which particles are accelerated, where the resonant cavity has a background magnetic field having a first shape; and an extraction channel for receiving particles output from the resonant cavity. The extraction channel comprises a series of focusing regions to focus a beam of received particles. At least one of the focusing regions is a focusing element configured to alter a shape of the background magnetic field to a second shape that is substantially opposite to the first shape in the presence of a magnetic field gradient resulting from reduction of the background magnetic field from the resonant cavity to the extraction channel. | ||
| 申请公布号 | US8927950(B2) | 申请公布日期 | 2015.01.06 |
| 申请号 | US201314039752 | 申请日期 | 2013.09.27 |
| 申请人 | Mevion Medical Systems, Inc. | 发明人 | Gall Kenneth P.;Zwart Gerrit Townsend;Van der Laan Jan;O'Neal, III Charles D.;Franzen Ken Yoshiki |
| 分类号 | A61N5/00;H05H13/02;A61N5/10;H05H7/04;H05H7/10 | 主分类号 | A61N5/00 |
| 代理机构 | Fish & Richardson P.C. | 代理人 | Fish & Richardson P.C. |
| 主权项 | 1. A particle accelerator comprising: a resonant cavity in which particles are accelerated, the resonant cavity having a background magnetic field having a first shape, the background magnetic field being at least 6 Tesla; and an extraction channel for receiving particles output from the resonant cavity, the extraction channel comprising a series of focusing regions to focus a beam of received particles, wherein at least one of the focusing regions is a focusing element configured to alter a shape of the background magnetic field to a second shape that is substantially opposite to the first shape in the presence of a magnetic field gradient resulting from reduction of the background magnetic field from the resonant cavity to the extraction channel. | ||
| 地址 | Littleton MA US | ||