ORGANIC MATTER SURFACE-IONIZATION ION SOURCE Russian patent published in 2007 - IPC G01N27/64 H01J49/26 

FIELD: surface-ionization ion sources.

SUBSTANCE: device can be used in drift spectrometer and other analytical devices. Surface of electrode which control ion current from surface of flat thermal emitter, having working surface of D diameter, turned to ion thermal emitter, has ring-shaped protrusion. Diameter of external base of protrusion coincides with diameter of working surface of thermal emitter, and diameter of internal base coincides with diameter d of central channel in electrode controlling thermal emitter's ion current. The most optimal version of ion source has to be ion source into which source the diameter D₃ of vertex of ring-shaped onto surface of electrode for controlling ion current is chosen from relation of D₃=(0,8-1,2)*(D+d)/2. Height of protrusion is chosen from relation of h₁=(0,4-0,6)*h and meaning h of space between surface of thermal emitter and flat part of electrode controlling thermal emitter's current, is chosen from relation of h=(0,4-1,5)*d. High efficiency of ion collection from surface of ion's thermal emitter is provided within wide dynamic range. Cylindrical ion beam can be formed and subject to further analysis or registration.

EFFECT: improved efficiency of operation.

3 cl, 1 dwg

EFFECT: