发明名称 |
Metod och system för minimerande av magnetstorlek |
摘要 |
A method is disclosed for minimising the diameter of the magnet poles of a cyclotron system for production of radioactive tracers. The method selects an operation mode having vz defined below the critical resonance value of vz=½ and chooses a valley technique having shallow valleys by selecting a first magnet pole parameter defining a valley gap accepting a narrow spaced RF electrode system and size facilitating a vacuum conductance necessary for obtaining a low enough pressure. The method then defines a second magnet pole parameter by setting a sector gap size. The magnetic azimuthal field shape is transformed from being "square-wave"-shaped to becoming approximately sinusoidal by increasing the magnetising field. Then an average magnetic field is calculated from the increased magnetising field and the first and second magnet pole parameter. A pole diameter can then be established to obtain a most compact design of the electromagnet for a cyclotron system. A cyclotron system in accordance with the method is also disclosed. |
申请公布号 |
SE9803303(D0) |
申请公布日期 |
1998.09.29 |
申请号 |
SE19980003303 |
申请日期 |
1998.09.29 |
申请人 |
GEMS PET SYSTEMS AB |
发明人 |
JAN OLOF *BERGSTROEM;STIG *LINDBAECK |
分类号 |
H05H7/04;H05H13/00;(IPC1-7):H05H/ |
主分类号 |
H05H7/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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