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two screen measurement
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  相似匹配句对
     Two.
     二.
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     Two.
     二、末日意识
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     Study on two realize methods of whole-screen edit
     全屏幕编辑的两种实现方案的研究
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     DEVELOPMENT OF LOW NOISE TWO-AXLE VIBRATING SCREEN
     低噪声双轴振动筛研制
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     On literature on Screen
     影视化接受:文学不能承受之轻
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The two screen measurement of emittance is a standard method often used by many accelerator laboratories in the world. In this method forming a beam waist at the location of the screen is a necessary condition. But in many cases it is very difficult to satisfy this condition. Instead one can use an beam spot minimizing method, in which the beam spot at screen is focused as small as possible. In this paper we...

The two screen measurement of emittance is a standard method often used by many accelerator laboratories in the world. In this method forming a beam waist at the location of the screen is a necessary condition. But in many cases it is very difficult to satisfy this condition. Instead one can use an beam spot minimizing method, in which the beam spot at screen is focused as small as possible. In this paper we give a new two screen emittance measurement formula which corresponds directly to the condition “beam spot minimizing”. Thus the problem of two screen emittance measurement is solved completely.

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。

 
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