A  MODIFIED  MASS  REFLECTRON

Yu. K. Golikov, N. V. Krasnov, R. A. Bublyaev

Institute for Analytical Instrumentation RAS, Saint-Petersburg

  The paper offers a new electron-optical circuit for a three-component mass reflectron. It consists of two  drift spaces separated by a double electric layer and a single parallel-plate electrostatic mirror-condenser. The double layer in the actual construction is replaced with two closely-spaced small grids formed by a set of parallel metal wires. This scheme provides the third order energy focusing at low 4th order aberrations. A consistent analytical theory of such a modified reflectron is developed, and it is shown that the proposed version is optimal as compared to a general triple-mirror reflectron.