采用束斑极小化的双屏法测量发射度的计算
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摘要: 双屏法是一种常用的标准的几何发射度测量方法,它需要束流在其中一个靶屏上成腰这一特定条件。在把束腰调到靶屏上非常困难的情况下,可通过调节前面的四极磁铁使靶屏上的束斑尽可能的小(束斑极小化),以此代替“成腰”条件,并推导出与“束斑极小化”相对应的双屏法测量发射度计算公式。Abstract: The twoscreen measurement ofemittance is a standard method often usedby many accelerator laboratories in theworld. In this method forming a beam waistat the location of the screen is a necessarycondition. But in many cases it is very difficult to satisfy this condition. Insteadone can use an beam spot minimizing method,in which the beam spot at screen is focusedas small as possible. In this paper?
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Key words:
- emittance /
- twoscreen measurement
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