Abstract: A coil assembly includes a strip member having a width in an axial direction, a length in a circumferential direction, and a thickness in a radial direction of a coil assembly. The strip is rolled in the circumferential direction into a plurality of turns stacked on one another. The coil group includes a plurality of coils made from an electrically conductive material. The coils are arranged in a length direction of the strip. Each of the coils is shaped, to have an open end facing in a first width direction and a closed end facing in a second width direction opposite the first width direction. Two of the coils arranged adjacent each other in the length direction of the strip are connected in a preselected way on a first width end facing away from a second width end portion of the strip in the first width direction.

Abstract: An MT-TOFMS which is one mode of the present invention includes: a linear ion trap (2) configured to temporarily hold ions to be analyzed, and to eject the ions through an ion ejection opening (211) having a shape elongated in one direction; a loop flight section (3) configured to form a loop path (P) capable of making ions repeatedly fly; and a slit part (5) located on an ion path in which the ions ejected from the linear ion trap (2) travel until the ions are introduced into the loop path, the slit part configured to block a portion of the ions in a longitudinal direction of the ion ejection opening (211).

Abstract: A plurality of partial mass-to-charge-ratio ranges are defined so that neighboring partial mass-to-charge-ratio ranges overlap each other at a mass-to-charge ratio of a reference ion (Step 2). Mass spectrometry data of a known compound is acquired in each partial mass-to-charge-ratio range (Steps 3 and 4). A normalization coefficient is determined based on a measured intensity of the reference ion in the mass spectrometry data acquired in each of the neighboring partial mass-to-charge-ratio ranges (Steps 6 and 9). Mass spectrometry data of a measurement-target sample is acquired in each partial mass-to-charge-ratio range (Step 12). The mass spectrometry data of the measurement-target sample acquired in each partial mass-to-charge-ratio range is normalized by being multiplied by the corresponding normalization coefficient (Step 14). The normalized mass spectrometry data of the plurality of partial mass-to-charge-ratio ranges is integrated into one set of mass spectrometry data (Step 15).

Abstract: A stator includes an armature core having an annular shape, coils, and an insulator. The coils are arranged along the armature core. Each of the coils is a wound conductive winding. Each of the coils includes a pair of facing portions disposed to be aligned in a circumferential direction with a predetermined interval therebetween. The first and second facing portions of each of the coils constitute intermediate portions of the corresponding one of the coils. Each of the coils includes a pair of first and second coil end portions that link the facing portions to each other. The insulator is arranged between the stator core and the coils. The insulator includes a base comprised of an insulating material, and one or more soft-magnetic members each being comprised of a soft-magnetic material, the one or more soft-magnetic members being contained in the base.

Abstract: A motor includes a stator having a stator core. The stator includes a coil connection body of one phase having a plurality of coils connected with each other; at least one of the coils has an electrical resistance set to be different from an electrical resistance of another of the coils. The stator also includes a coil connection body of another phase having a plurality of coils connected with each other; at least one of the coils has an electrical resistance set to be different from an electrical resistance of another of the coils. Moreover, the coil connection body of the another phase has a combined resistance set to be equal to a combined resistance of the coil connection body of the one phase.

Abstract: Provided is a time-of-flight mass spectrometer including: a loop-orbit defining electrode (21) including an outer electrode (211) and inner electrode (212) located on the outside and inside of a loop orbit, respectively; an ion inlet (22); an ion outlet (23) provided in either the outer or inner electrode; a loop-flight voltage applier (28) configured to apply loop-flight voltages to the outer and inner electrodes, respectively; a set of deflecting electrodes (24) facing each other across a section of an n-th loop orbit, where n is a predetermined number, the deflecting electrodes including a first portion (241) which faces the n-th loop orbit and a second portion (242) which includes other portions; and a voltage applier (29) configured to apply deflecting voltages to the first portion so as to reverse the drifting direction of the ions flying in the n-th loop orbit, and a voltage to the second portion so as to create the loop-flight electric field.

Abstract: An MT-TOFMS which is one mode of the present invention includes: a linear ion trap (2) configured to temporarily hold ions to be analyzed, and to eject the ions through an ion ejection opening (211) having a shape elongated in one direction; a loop flight section (3) configured to form a loop path (P) capable of making ions repeatedly fly; and a slit part (5) located on an ion path in which the ions ejected from the linear ion trap (2) travel until the ions are introduced into the loop path, the slit part configured to block a portion of the ions in a longitudinal direction of the ion ejection opening (211).

Abstract: Provided is a time-of-flight mass spectrometer including: a loop-orbit defining electrode (21) including an outer electrode (211) and inner electrode (212) located on the outside and inside of a loop orbit, respectively; an ion inlet (22); an ion outlet (23) provided in either the outer or inner electrode; a loop-flight voltage applier (28) configured to apply loop-flight voltages to the outer and inner electrodes, respectively; a set of deflecting electrodes (24) facing each other across a section of an n-th loop orbit, where n is a predetermined number, the deflecting electrodes including a first portion (241) which faces the n-th loop orbit and a second portion (242) which includes other portions; and a voltage applier (29) configured to apply deflecting voltages to the first portion so as to reverse the drifting direction of the ions flying in the n-th loop orbit, and a voltage to the second portion so as to create the loop-flight electric field.

Abstract: An ion guide (222) is for use in transport of an ion incident from an upstream side toward a downstream side. The ion guide includes 2n rod electrodes (n is an integral number greater than or equal to 2) equally spaced and surrounding an ion optical axis (C) that is a central axis of a flight path of the ion, a voltage applying unit (30) that applies a radio-frequency voltage to the 2n rod electrodes, and a controller (43) that controls the voltage applying unit (30). The controller (43) prompts the voltage applying unit (30) to apply a radio-frequency voltage that generates, in a space surrounded by the 2n rod electrodes, an electric field which is a 2n-multipole electric field superimposed by a higher-order electric field component than the 2n-multipole electric field.

Abstract: Provided is a mass spectrometer which repeats the operation of capturing ions originating from a sample component into an ion trap (22), ejecting the ions from the ion trap, and analyzing the ions with a TOF mass analyzer (23). A capturing voltage generator (51) applies an ion-capturing radio-frequency voltage to the ion trap. An ejecting voltage generator (52) applies an ion-ejecting voltage whose phase is synchronized with the radio-frequency voltage. A controller (4) controls those devices to introduce next ions to be analyzed into the ion trap while performing a mass spectrometric analysis in the TOF mass analyzer. A blank signal acquirer (4, 32) acquires a blank signal within a measurement period or measurement window while the ion trap is being operated. A noise remover (33) subtracts blank-signal data from signal intensity data acquired by a sample measurement. A spectrum creator (34) creates a mass spectrum based on noise-removed data.

Abstract: A mass spectrometer including: an ionization chamber (11) that generates ions from a sample, a collision cell (222) located downstream from the ionization chamber (11), a mass separation unit (2412) located downstream from the collision cell (222), an energy barrier unit (223) located between the collision cell (222) and the mass separation unit (2412), a voltage application unit (30) that applies a voltage to each of the ionization chamber (11), the collision cell (222), and the energy barrier unit (223), and a control unit (42) that controls the voltage application unit (30) such that a potential of the ionization chamber (11) is set to a first potential, a potential of the collision cell (222) is set to a second potential that is lower than the first potential, and a potential of the energy barrier unit (223) is set to a third potential between the first potential and the second potential.

Abstract: A mass spectrometer including: an ionization chamber (11) that generates ions from a sample, a collision cell (222) located downstream from the ionization chamber (11), a mass separation unit (2412) located downstream from the collision cell (222), an energy barrier unit (223) located between the collision cell (222) and the mass separation unit (2412), a voltage application unit (30) that applies a voltage to each of the ionization chamber (11), the collision cell (222), and the energy barrier unit (223), and a control unit (42) that controls the voltage application unit (30) such that a potential of the ionization chamber (11) is set to a first potential, a potential of the collision cell (222) is set to a second potential that is lower than the first potential, and a potential of the energy barrier unit (223) is set to a third potential between the first potential and the second potential.

Abstract: A first end contact portion of a first frame end contacts one end surface of a stator core. A second end contact portion of a second frame end contacts the other end surface of the stator core and includes an inner tubular part, which contacts the other end surface of the stator core, and a fixing part, which projects radially outward from the inner tubular part and contacts the other end surface. A through-bolt is threaded into the fixing part. An outer diameter of the one end surface is smaller than an outer diameter of an opposing surface of the first end contact portion. An outer diameter of an opposing surface of the inner tubular part is smaller than an outer diameter of the other end surface. A yoke of the stator core includes a relief groove, into which a portion of the through-bolt is fitted.

Abstract: An offset voltage adjusting portion is provided in an amplifying portion for applying respective pulse voltages to a pair of grid electrodes that structures a shutter gate grid. Because the pulse voltage is shifted in the direction of the voltage axis, with the amplitude and pulse width thereof maintained, when the offset voltage is adjusted, this enables a potential difference to be applied to the voltages that are applied to the front grid electrode and the rear grid electrode when the shutter gate grid is open. This potential difference produces an electric field for accelerating ions in the space between the pair of grid electrodes, thus accelerating the movement of ions immediately following the switching of the shutter gate grid from the closed state to the open state, enabling the pulse width of the ions to be narrowed.

Abstract: In an ion source 3 in which a repeller electrode 32 for forming a repelling electric field that repels ions toward an ion emission port 311 is provided inside of an ionization chamber 31, ion focusing electrodes 36 and 37 are respectively arranged between an electron introduction port 312 and a filament 34 and between an electron discharge port 313 and a counter filament 35. An electric field formed by applying a predetermined voltage to each of the ion focusing electrodes 36 and 37 intrudes into the ionization chamber 31 through the electron introduction port 312 and the electron discharge port 313, and becomes a focusing electric field that pushes the ions in an ion optical axis C direction. Ions at positions off a central part of the ionization chamber 31 receive the combined force of the force of the repelling electric field and the force of the focusing electric field, and move toward the ion emission port 311 while approaching the ion optical axis C.

Abstract: In an ion source 3 in which a repeller electrode 32 for forming a repelling electric field that repels ions toward an ion emission port 311 is provided inside of an ionization chamber 31, ion focusing electrodes 36 and 37 are respectively arranged between an electron introduction port 312 and a filament 34 and between an electron discharge port 313 and a counter filament 35. An electric field formed by applying a predetermined voltage to each of the ion focusing electrodes 36 and 37 intrudes into the ionization chamber 31 through the electron introduction port 312 and the electron discharge port 313, and becomes a focusing electric field that pushes the ions in an ion optical axis C direction. Ions at positions off a central part of the ionization chamber 31 receive the combined force of the force of the repelling electric field and the force of the focusing electric field, and move toward the ion emission port 311 while approaching the ion optical axis C.

Abstract: A first end contact portion of a first frame end contacts one end surface of a stator core. A second end contact portion of a second frame end contacts the other end surface of the stator core and includes an inner tubular part, which contacts the other end surface of the stator core, and a fixing part, which projects radially outward from the inner tubular part and contacts the other end surface. A through-bolt is threaded into the fixing part. An outer diameter of the one end surface is smaller than an outer diameter of an opposing surface of the first end contact portion. An outer diameter of an opposing surface of the inner tubular part is smaller than an outer diameter of the other end surface. A yoke of the stator core includes a relief groove, into which a portion of the through-bolt is fitted.

Abstract: A motor includes a motor case, and a rotor and a stator, which are disposed in the case. The case has a tubular portion, a front cover mounted to an axial end of the portion, and a rear cover mounted to the other axial end of the portion. The rotor has a rotary shaft and the stator includes a plurality of teeth, which extend toward a central axis of the shaft and are circumferentially disposed at equal intervals. Between each circumferentially adjacent pair of the teeth, a slot extending toward the axis is formed. In each slot, a U-shaped segment is inserted in parallel with the axis. The distal ends of the segments projecting out from the slots are electrically interconnected, thereby forming an SC coil including the segments disposed circumferentially. The SC coil includes a receiving terminal, and the terminal includes leads extending in parallel to the axis.

Abstract: A motor includes a motor case, and a rotor and a stator, which are disposed in the case. The case has a tubular portion, a front cover mounted to an axial end of the portion, and a rear cover mounted to the other axial end of the portion. The rotor has a rotary shaft and the stator includes a plurality of teeth, which extend toward a central axis of the shaft and are circumferentially disposed at equal intervals. Between each circumferentially adjacent pair of the teeth, a slot extending toward the axis is formed. In each slot, a U-shaped segment is inserted in parallel with the axis. The distal ends of the segments projecting out from the slots are electrically interconnected, thereby forming an SC coil including the segments disposed circumferentially. The SC coil includes a receiving terminal, and the terminal includes leads extending in parallel to the axis.