Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
264 words
Stigmatically imaging mass spectrometer with directional and energy focussing, comprising consecutively positioned with respect to ion travel: an entry diaphragm (24); a first analyzer; an energy diaphragm (28) to limit the energy range; a second analyzer having an energy dispersion factor which is equal to and opposite to that of the first analyzer; and an exit diaphragm (14); one of the analyzers being a momentum analyzer having a wedgeshaped magnetic field, and the other analyzer being an energy analyzer having an electric field; the momentum analyzer comprising a magnet having mutually opposite plane pole-piece surfaces (11) which are mutually inclined and have straight edges which are parallel and spaced by a distance Ao from the intersection line (10) of the planes containing the pole-piece surfaces (11) and parallel to said intersection line, and the magnetic field intensity BA at the distance interval being defined by A 2.10Ao from the intersection line (10) being adjusted to the value BA 1.35p/Ae, wherein e charge of the ions; p momentum of the ions to be detected; the diaphragms (14, 28) between which the momentum analyzer is placed are arranged on the intersection line (10) with a mutual spacing interval of approximately 1.28 A; the energy analyzer, which forms a stigmatic image of the diaphragm (24) at the entry side thereof on the diaphragm (28) located at the exit side thereof, including a spherical condenser (15, 15'') or a cylindrical condenser (15''''), the ions travelling through the condenser in planes which pass through the cylinder axis (34), ions of equal energy being focussed on the energy diaphragm (28).
Claim 2
Dependent Claim
264 words
Stigmatically imaging mass spectrometer with directional and energy focussing, comprising consecutively positioned with respect to ion travel: an entry diaphragm (24); a first analyzer; an energy diaphragm (28) to limit the energy range; a second analyzer having an energy dispersion factor which is equal to and opposite to that of the first analyzer; and an exit diaphragm (14); one of the analyzers being a momentum analyzer having a wedgeshaped magnetic field, and the other analyzer being an energy analyzer having an electric field; the momentum analyzer comprising a magnet having mutually opposite plane pole-piece surfaces (11) which are mutually inclined and have straight edges which are parallel and spaced by a distance Ao from the intersection line (10) of the planes containing the pole-piece surfaces (11) and parallel to said intersection line, and the magnetic field intensity BA at the distance interval being defined by A 2.10Ao from the intersection line (10) being adjusted to the value BA 1.35p/Ae, wherein e charge of the ions; p momentum of the ions to be detected; the diaphragms (14, 28) between which the momentum analyzer is placed are arranged on the intersection line (10) with a mutual spacing interval of approximately 1.28 A; the energy analyzer, which forms a stigmatic image of the diaphragm (24) at the entry side thereof on the diaphragm (28) located at the exit side thereof, including a spherical condenser (15, 15'') or a cylindrical condenser (15''''), the ions travelling through the condenser in planes which pass through the cylinder axis (34), ions of equal energy being focussed on the energy diaphragm (28).
Claim 3
Dependent Claim
49 words
Mass spectrometer according to claim 1, wherein the spherical condenser (15) is a symmetrically grounded 90* condenser (15) having an entry axis, said entry axis being oriented at the distance L 1.03A to be parallel to the intersection line (10) of the planes passing through the pole-piece surfaces (11).
Claim 4
Dependent Claim
29 words
Mass spectrometer according to claim 1 wherein the energy analyzer includes a 45* spherical condenser (15'') and a circular ion lens (30) located in advance of said spherical condenser.
Claim 5
Dependent Claim
112 words
Mass spectrometer according to claim 1, wherein the energy analyzer includes a cylindrical condenser (15'''') having an axis, an outer cylinder (40) and an inner cylinder (38), the axis (34) subtending an angle theta of 42.3* with the axis (36) of the entering ion beam; wherein the radius -a- of the inner cylinder (38) is equal to 0.274A, and wherein the energy of the entering ions and the voltage of the outer cylinder, and its radius have the relationship: (Uo/Ub) log (b/a) 1.31, wherein Uo volt energy of an entering ion Ub voltage of the outer cylinder (40) -a- radius of the inner cylinder (38) b radius of the outer cylinder (40).