| Paper | Title | Page |
|---|---|---|
WEPPD011 |
The Possibilities of a Shadow Mask Application for the Systems of SR Beam Stabilization | |
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| The stabilization systems of synchrotron radiation (SR) beam position based on recording of optical images from luminescent screens by multielement photodetectors (CCDs, CMOS-sensors) are considered. Limit of stabilization accuracy (the noise of position measurement) of these systems is defined by both the noise of detector readout and the capacity of detector cells (that defined the quantum noise level of image). In the case of stabilization of one fixed position the additional screen (shadow mask), blocking or weakening part of SR beam, can be used. It is shown that application of the shadow mask can increase the limit of stabilization accuracy. In addition, in certain geometry the shadow mask can operate as a zero-organ (reducing the contribution of some sources of drifts) or to ensure the simultaneous stabilization of beam position and angle using only one detector. | ||