H - Electricity – 01 – J
Patent
H - Electricity
01
J
317/31
H01J 49/26 (2006.01) H01J 49/42 (2006.01)
Patent
CA 2033753
An exact three-dimensional rotationally symmetric quadrupole field or an electric field of higher multipole moments can be generated by closed boundaries with continuously varied potential, especially with linearly variable potential, in the ideal case by simple cone-shaped boundaries with linearly variable potential. An example for the application of the field is storage of charged particles inside the closed boundaries. Within the same cone-shaped boundaries, a homogeneous ideal field in the direction of the symmetry axis can be superimposed. This field can be employed for excitation of the kinetic energy, for quenching, or for energy analysis of the stored charged particles. For the generation of mass spectra the mass-to-charge specific fundamental frequencies of the charged particles stored in the electrode structure are excited. The image currents induced in the electrode structure are frequency analysed (e.g. by Fourier transform).
Bruker-Franzen Analytik Gmbh
Cassan Maclean
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