| 摘要 |
<p>There is provided a mass spectrometer having at least three analyser sectors of the electrostatic or magnetic types, at least one said sector being of the electrostatic type and at least one further said sector being of the magnetic type, wherein said spectrometer comprises a focusing sector array comprising at least three of said sectors, said sectors of said array being dimensioned and positioned so as to cooperate to form a velocity- and direction-focused image and said sectors of said array being so dimensioned and positioned as to form no velocity focused image within said array, and wherein one said sector of said array is disposed adjacent to and between two sectors of the other type.</p> |
