Anuj K. PURWAR,James E. CLAYTON,Dragos E. CONSTANTIN,Gard E. MEDDAUGH,Matthew C. SCHMIDT,Mark E. TRAIL,Flavio POEHLMANN
申请号：
US16833424
公开号：
US20200227184A1
申请日:
2020.03.27
申请国别(地区):
US
年份:
2020
代理人:
摘要：
A method performed by a medical device, includes: providing a permanent magnetic field by a permanent magnet； operating an electromagnet to provide a first electromagnetic field with a first electromagnetic field value； and operating the electromagnet to provide a second electromagnetic field with a second electromagnetic field value； wherein the first electromagnetic field and the permanent magnetic field forms a first total magnetic field with a first total magnetic field value, and wherein the second electromagnetic field and the permanent magnetic field forms a second total magnetic field with a second total magnetic field value； wherein the first total magnetic is formed when an electric field in an accelerator or an energy level of a particle beam has a first value, and wherein the second total magnetic field is formed when the electric field in the accelerator or the energy level of the particle beam has a second value.
