SU1674290A1

SU1674290A1 - Prism mass spectrometer with ions passing through magnetic field many times

Info

Publication number: SU1674290A1
Application number: SU884451481A
Authority: SU
Inventors: Вениамин Моисеевич Кельман; Александр Григорьевич Мить
Original assignee: Институт Ядерной Физики Ан Казсср
Priority date: 1988-07-01
Filing date: 1988-07-01
Publication date: 1991-08-30

Abstract

Изобретение относитс к масс-спектрометрии и может быть использовано дл определени химического или изотопного состава веществ. Целью изобретени вл етс одновременное увеличение дисперсии и разрешающей способности прибора. Устройство содержит магнитную призму 1 и электроды 2 - 5 электростатической призмы. Ионы поступают из источника 8 через коллиматорную линзу 9, после чего они совершают несколько оборотов по кольцу, смеща сь после каждого оборота. По достижении определенного линейного смещени траектории ионы выход т через линзу 10. За счет повторных проходов ионов через анализирующее поле дисперси увеличиваетс во столько же раз, сколько совершаетс проходов. 3 ил.The invention relates to mass spectrometry and can be used to determine the chemical or isotopic composition of substances. The aim of the invention is to simultaneously increase the dispersion and resolution of the instrument. The device contains a magnetic prism 1 and electrodes 2 - 5 electrostatic prisms. The ions come from source 8 through collimator lens 9, after which they make several turns around the ring, shifting after each rotation. When a certain linear displacement of the trajectory is reached, the ions exit through the lens 10. Due to repeated passes of the ions through the analyzing field, the dispersion increases by as many times as there are passes. 3 il.

Description

А-АAa

У//////////////////////////

JS J Л f/S JS J L f / S

////s //// s

EZZJL2EZZJL2

Фм. 5Fm five

Фм.2Fm.2

У///ЛW /// L

VSSSAVSSSA

Claims

Claim

A prism mass spectrometer with multiple passage of magnetic field ions, containing an ion source and receiver, a magnetic prism, a collimator and focusing lenses, two electrostatic telescopic systems and two electrostatic mirrors, characterized in that, in order to simultaneously increase dispersion and resolution, electrostatic mirrors are located on opposite sides of the magnetic prism, telescopic systems are placed between electrostatic mirrors with the possibility of the formation of several cm Orbits of the beam with a constant step, while at least the reflecting planes of electrostatic mirrors or refracting planes of electrostatic telescopic systems are located asymmetrically relative to the plane parallel to the plane of symmetry of the magnetic prism, and the reflecting planes of electrostatic mirrors are perpendicular to the plane of antisymmetry of the magnetic field of the magnetic prism, and the angle between the plane the symmetry of the magnetic prism and the reflecting planes of electrostatic mirrors is

Ф = (а- /?), Where a is the angle of incidence of the ion beam on the magnetic prism, rad;

o a + j - i

10 p. = --—- L - angle of incidence of the beam on the electrostatic mirror, rad;

I is the angle of incidence of the beam at the input face of the electrostatic prism, rad;

J is the angle of refraction of the beam on this face 15, glad

A/

Figure 1

5- δ '' tz ^ l EZZZ3 • JT2ZZ3 ESSSSSSSSSS tZ23 ESSSSSSSSSSSSSSSSS EZS3

S e

FIG. 3