Novel simulation method of space charge effects in electron optical systems including emission of electrons

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F18%3A00489598" target="_blank" >RIV/68081731:_____/18:00489598 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.ultramic.2017.10.010" target="_blank" >http://dx.doi.org/10.1016/j.ultramic.2017.10.010</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ultramic.2017.10.010" target="_blank" >10.1016/j.ultramic.2017.10.010</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Novel simulation method of space charge effects in electron optical systems including emission of electrons

Popis výsledku v původním jazyce

We present a comprehensive numerical method for iterative computation of electron optical systems influenced by space charge which can accurately describe all effects in an optical system, including areas near a cathode tip and all crossovers. We use two different algorithms of evaluating the space charge distribution in different parts of the system. The Monte-Carlo based particle-in-cell method is used in the vicinity of the cathode. The algorithm based on the calculation of the current density distribution from an aberration polynomial is used for the rest of the system. We introduce a re-meshing algorithm which adapts the finite element mesh used for the field calculation in each iteration to the actual space charge distribution to keep it sufficiently fine in all areas with non-zero space charge. The algorithm is finally tested on a design of an experimental electron-welding machine developed at the ISI of the CAS.

Název v anglickém jazyce

Novel simulation method of space charge effects in electron optical systems including emission of electrons

Popis výsledku anglicky

We present a comprehensive numerical method for iterative computation of electron optical systems influenced by space charge which can accurately describe all effects in an optical system, including areas near a cathode tip and all crossovers. We use two different algorithms of evaluating the space charge distribution in different parts of the system. The Monte-Carlo based particle-in-cell method is used in the vicinity of the cathode. The algorithm based on the calculation of the current density distribution from an aberration polynomial is used for the rest of the system. We introduce a re-meshing algorithm which adapts the finite element mesh used for the field calculation in each iteration to the actual space charge distribution to keep it sufficiently fine in all areas with non-zero space charge. The algorithm is finally tested on a design of an experimental electron-welding machine developed at the ISI of the CAS.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Ultramicroscopy

ISSN

0304-3991

e-ISSN

—

Svazek periodika

184

Číslo periodika v rámci svazku

JAN

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

66-76

Kód UT WoS článku

000417779800009

EID výsledku v databázi Scopus

2-s2.0-85032508057