Author/Authors :
Alexander، نويسنده , , J.P. and Chatterjee، نويسنده , , A. and Conolly، نويسنده , , C. and Edwards، نويسنده , , E. and Ehrlichman، نويسنده , , M.P. and Flanagan، نويسنده , , J.W. and Fontes، نويسنده , , E. and Heltsley، نويسنده , , B.K. and Lyndaker، نويسنده , , A. and Peterson، نويسنده , , D.P. and Rider، نويسنده , , N.T. and Rubin، نويسنده , , D.L. and Seeley، نويسنده , , Steven R. and Shanks، نويسنده , , J.، نويسنده ,
Abstract :
We describe the design and performance of optical elements for an x-ray beam size monitor (xBSM), a device measuring e + and e − beam sizes in the CESR-TA storage ring. The device can measure vertical beam sizes of 10 – 100 μ m on a turn-by-turn, bunch-by-bunch basis at e ± beam energies of ~ 2 – 5 GeV . x-rays produced by a hard-bend magnet pass through a single- or multiple-slit (coded aperture) optical element onto a detector. The coded aperture slit pattern and thickness of masking material forming that pattern can both be tuned for optimal resolving power. We describe several such optical elements and show how well predictions of simple models track measured performances.
Keywords :
Coded aperture , X-ray diffraction , Synchrotron radiation , Pinhole , Electron storage ring , Electron beam size
