Periscope Pop-In Beam Monitor
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by E. D. Johnson, W. S. Graves, K. E. Robinson Z
http://www.slac.stanford.edu/pubs/confproc/biw98/johnson.e.pdf
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Abstract:
Abstract. We have built monitors for use as beam diagnostics in the narrow gap of an undulator for an FEL experiment. They utilize an intercepting screen of doped YAG scintillating crystal to make light that is imaged through a periscope by conventional video equipment. The absolute position can be ascertained by comparing the electron beam position with the position of a He:Ne laser that is observed by this pop-in monitor. The optical properties of the periscope and the mechanical arrangement of the system mean that beam can be spatially determined to the resolution of the camera, in this case approximately 10 micrometers. Our experience with these monitors suggests improvements for successor designs, which we also describe.
Citations
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