A rapid scanning double focusing mass spectrograph having a source of ions, means for producing a toroidal electric field, means for producing a homogeneous magnetic field and means for producing an r.sup.-.sup.1 magnetic field, wherein the r.sup.-.sup.1 magnetic field and the homogeneous magnetic field are excited simultaneously with a single energizing magnet and upper and lower parallel pole pieces of the means for producing a homogeneous magnetic field are secured to the rear ends of the upp...

A virtual image type double focusing mass spectrometer having a diverging electrostatic field and a converging magnetic field, wherein parameters related to the fringing effects in the boundaries of said fields and to the distribution of the electrostatic field reduces image aberrations of the second order.

The molecules of a sample are ionized and the produced ions are subjected to a dispersion according to their kinetic energies in an electrostatic field and then to a dispersion according to their mass numbers in a magnetic field. Of the mass-dispersed ions, some having a specific mass number are focussed by means of a lens system disposed between the electrostatic and magnetic fields and the focussed ions are detected by an ion detector.

A double focusing mass spectrometer is used as the second mass analyzer of a Mass Spectrometry/Mass Spectrometry Instrument comprising a uniform electric field and a magnetic sector. Fragment ions produced from precursor ions of a certain ionic species are introduced into a uniform electric field. The fragment ions travel along parabolic orbits and are separated according to their respective energy levels. The separated fragment ions are introduced into a magnetic sector and are dispersed accord...

A double focusing mass spectrometer having a diverging electrostatic field, a converging electrostatic field and a converging magnetic field. The two electrostatic fields are connected with each other without substantial free space therebetween. The ion beam passes through the electrostatic fields coming to an intermediate focus point adjacent to the ion exit boundary of said converging electrostatic field. The beam then passes through the magnetic field to satisfy the double focusing condition ...

In a mass spectrometer of the magnetic field type for analyzing the mass of ions by causing an ion beam to pass through a narrow slit and then through a deflecting magnetic field to be detected by an ion detector where the intensity of the deflecting magnetic field is varied, plural electrostatic quadrupole lenses are provided between the source slit and the deflecting magnetic field so as to give a converging property to an ion beam passing in a direction vertical to the median plane thereof an...

A mass spectrometer comprises a source for generating ions, a means for separating the ions according to mass, and means for detecting the separated ions. The mass spectrometer is characterized by that means for separating ions comprises a sector type homogenous magnetic field, and that the magnetic field has a deflection angle ranging from 110 to 135 degrees, and incident and exit angles ranging from 40 to 60 degrees.

A mass spectrometer employing superimposed electric and magnetic fields arranged substantially at right angles. The central orbit of the ion beam is located on an equipotential surface in the electric field at right angles to the magnetic field. The ions constituting the ion beam are separated in accordance with their mass to charge ratios by superimposed fields. The field strengths are adjusted to satisfy the two dimensional double focusing condition.

A mass spectrometer has a uniform magnetic field and an electric field. Further, the spectrometer is equipped with three spaced electrostatic quadrupole lenses. The deflection angle .phi..sub.m of the beam in the magnetic field, the radius r.sub.m of the circle described by the beam in the magnetic field, the deflection angle .phi..sub.e of the beam in the electric field, and the radius r.sub.e of the circle described by the beam in the electric field are so set as to satisfy the following relat...

In an elevator having an ascending and descending car, the car having side walls for forming the side surfaces of the car, an entrance/exit front wall for allowing a passenger and an article to ride on or alight from the car, a back wall opposed to the entrance/exit front wall, and plate members mounted to extend in the ascending and descending directions of the entrance/exit front wall, further having fairing covers provided to extend in the ascending and descending directions from the side wal...