Detail publikace

Vliv nasycení materiálu magnetické čočky na pole deflektorů a parazitární pole

ZLÁMAL, J. LENCOVÁ, B.

Český název

Vliv nasycení materiálu magnetické čočky na pole deflektorů a parazitární pole

Anglický název

Influence of Saturation of Magnetic Lens Material on Fields of Deflectors and Parasitic Fields

Typ

článek v časopise ve Scopus, Jsc

Jazyk

en

Originální abstrakt

In the connection with the calculation of parasitic fields of highly saturated lens in emerged the problem of calculation of the field of deflectors situated next to saturated magnetic materials. Up to date the deflection fields were studied only near rotationally symmetric materials with constant permeability. However, for the deflectors in saturated magnetic lenses the relative permeability is very inhomogeneous and near pole piece tips it is close to 1. We have therefore modified the computation of deflection fields in saturated lenses with EOD program to include the real value of permeability of magnetic materials. We can also display the distribution of permeability in the magnetic circuit of the lens to understand the changes in the field distribution in deflection or parasitic fields and to understand the saturation effects in magnetic lenses.

Český abstrakt

V souvislosti s výpočtem parazitických polí vysoce nasyceného objektivu se objevil problém výpočtu oblasti deflektorů umístěných vedle nasycených magnetických materiálů. Upravili jsme výpočet průhybu polí nasycených objektivů v programu EOD tak, aby zahrnovala skutečnou hodnotu propustnosti magnetického materiálu.

Anglický abstrakt

In the connection with the calculation of parasitic fields of highly saturated lens in emerged the problem of calculation of the field of deflectors situated next to saturated magnetic materials. Up to date the deflection fields were studied only near rotationally symmetric materials with constant permeability. However, for the deflectors in saturated magnetic lenses the relative permeability is very inhomogeneous and near pole piece tips it is close to 1. We have therefore modified the computation of deflection fields in saturated lenses with EOD program to include the real value of permeability of magnetic materials. We can also display the distribution of permeability in the magnetic circuit of the lens to understand the changes in the field distribution in deflection or parasitic fields and to understand the saturation effects in magnetic lenses.

Klíčová slova česky

Magnetické čočky; Elektronová optika; EOD

Klíčová slova anglicky

Magnetic Lens; Electron Optics; EOD

Rok RIV

2015

Vydáno

30.06.2015

ISSN

1431-9276

Ročník

21

Číslo

S4

Strany od–do

188–193

Počet stran

6

BIBTEX


@article{BUT119196,
  author="Jakub {Zlámal} and Jan {Čechal} and Bohumila {Lencová},
  title="Influence of Saturation of Magnetic Lens Material on Fields of Deflectors and Parasitic Fields",
  year="2015",
  volume="21",
  number="S4",
  month="June",
  pages="188--193",
  issn="1431-9276"
}