GB1367302A - Analysing apparatus - Google Patents

Abstract

1367302 Particle spectrometers; X-ray tubes NIHON DENSHI KK 19 Aug 1971 [19 Aug 1970] 39080/71 Heading H1D Analysing apparatus comprises means for producing a magnetic field symmetrical about an axis; means for supporting a specimen 6 in the field; an X-ray or low-pressure U-V resonance line source 8 for irradiating the specimen to give off electrons and means to analyse the electrons. Slight asymmetries of the # field about the axis do not affect focusing. Information on the bonding state of atoms may be obtained Coil 4, adjacent polepieces 1, 2, may be A.C. or D.C. excited, and specimen 6 and yoke 3 may be the same potential (e.g. earth). The output from energy analyser 11 is fed to recorder 12. In Fig. 2 (not shown), the electron velocities are reduced by an electric field, pole 1 being insulated by material (13) and pole 2 at negative potential. Voltages are specified. Separation of electrons according to energies is obtained in Fig. 3 (not shown), and detector 15 may measure electron intensity, D.C. source 17 being connected to non-magnetic apertured member (16). In Fig. 6 (not shown), U.V. is irradiated on to a gaseous specimen from vessel (19). He 2 gas in vessel (22) is ionized by discharge between electrodes (25a), (25b). Fig. 7 (not shown) includes insulator (27) between specimen and pole 1 for potential variations w.r.t. aperture (16) and Fig 8 (not shown) includes aperture with an insulating material (28). The p.d. being applied between the aperture rim and the specimen. Fig. 9 (not shown) includes a permanent magnet 29 to produce the symmetrical field and Fig. 10 (not shown) includes a solenoid (33). Fig. 11 (not shown) includes a lens of the kind used in a scanning or transmission electron microscope, and sample 6 is outside the space between poles 1 and 2. Fig. 12 (not shown) includes an X-ray generator comprising ring- shaped filament (35) for emitting electrons (36), spherical target (37) for generating X-rays by electron irradiation, and ring-shaped electrode (38) for controlling the electrons.