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Optimization of the Accelerators for the ITER Neutral Beam Injector Project

机译:ITER中性束注入器项目的加速器优化

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A joint Japan-EU R&D activity is in progress to optimize the accelerator for the ITER NBI. The accelerator baseline design is based on a five grids system which can be adapted to operate with three grids for initial operations at low voltage (500 kV). Moreover, in order to speed up the test of the NBI system at the Test Facility, a negative ion source with extraction voltage up to 100 kV will be operated in parallel to the full injector. In this contribution the three accelerators mentioned above are presented discussing the procedure to optimize the grid geometry in order to assure optimum optics during operation when the grids undergo deformations and thermal stresses due to the particles that hit their surface.
机译:日欧联合研发活动正在进行中,以优化ITER NBI的促进剂。加速器基线设计基于五栅系统,该系统可适用于三栅以在低压(500 kV)下进行初始运行。此外,为了加快在测试设施上对NBI系统的测试,抽气电压高达100 kV的负离子源将与整个进样器并联运行。在此贡献中,介绍了上述三个加速器,讨论了优化格栅几何形状的过程,以确保在操作过程中,当格栅由于撞击其表面的粒子而发生变形和热应力时,获得最佳的光学效果。

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