同步光干涉方法对BEPCⅡ储存环束流的测量
Beam size measurement of BEPCⅡ storage ring by using visible synchrotron light interferometry
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摘要: 利用同步光的可见光波段空间干涉方法,对北京正负电子对撞机储存环的束流横向截面垂直尺寸进行了测量。在同步模式下,测得束流横向截面垂直尺寸为155 μm，测量结果与理论值符合得很好。此方法避免了同步光衍射带来的测量误差,并使结果更精确，且对其它非相干小尺寸光源也同样适用。Abstract: The vertical beam size of BEPCⅡstorage ring was measured by using visible synchrotron light spatial interference method, and the measured size is 155 μm. The measurement results fit well with the calculation predication. This method can avoid the measurement error caused by synchrotron light diffraction and makes the measurement results more accurate. In addition, the method is applicable to other small size incoherent light source.
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Key words:
- synchrotron light /
- beam size measurement /
- interference /
- coherence degree
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