A Novel Micro-Mott Polarimeter with Cylindrical Symmetry
POSTER
Abstract
A novel micro-Mott polarimeter of cylindrical symmetry has been designed, constructed, and tested. It has a maximum efficiency at 10 keV of 5 x 10$^{-4}$ when $\Delta $E $=$ 1300 eV. (We define $\Delta $E to be the maximum energy loss an electron scattering from the polarimeter's Au target can have suffered and still be detected [1].) At 20 keV, the maximum voltage we put on the Au target, the effective Sherman function (analyzing power) is 24{\%} at $\Delta $E $=$ 600 eV where the efficiency is 5 x 10$^{-5}$. Below $\Delta $E of 500 eV at 20 keV, pollution from positive ions and x-rays reduces the analyzing power. We present SIMION [2] simulations that explain qualitatively this latter result. \\[4pt] [1] T.J. Gay, J.A. Brand, J.E. Furst, M.A. Khakoo, W.V. Meyer, W.M.K.P. Wijayaratna, and F.B. Dunning, Rev. Sci. Instrum. 63, 114 (1992).\\[0pt] [2] SIMION{\textregistered} Version 8.1
*Funded by NSF PHY-1206067