Noise of Low-Energy Electron Beam

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F15%3A00464578" target="_blank" >RIV/68081731:_____/15:00464578 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26220/15:PU119935

Výsledek na webu

<a href="http://dx.doi.org/10.1109/ICNF.2015.7288583" target="_blank" >http://dx.doi.org/10.1109/ICNF.2015.7288583</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/ICNF.2015.7288583" target="_blank" >10.1109/ICNF.2015.7288583</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Noise of Low-Energy Electron Beam

Popis výsledku v původním jazyce

Noise diagnostics were performed on a tungsten hair-pin cathode operating in a vacuum (3 · 10(-3) Pa). The cathode operates in thermal emission mode at several temperatures based on the level of heating. Several acceleration voltages have been used starting at 5 kV, 10 kV and 20 kV up to 30 kV. There were two modes-with and without electron beam scanning. Both setups were compared from the point of view of the noise spectral density value. Shot noise is about one order below the current noise spectral density of the electron beam. Therefore, in this case the shot noise spectral density can be neglected. Noise spectral density is 1/f type at the frequency band 0.1 to 10 Hz for cathode with thin film of tungsten oxides. For accelerating voltage from 5 to 20 kV noise in the frequency band from 2 to 20 Hz can be described by the g-r noise with noise spectral density proportional to square of a beam current. At accelerating voltage 30 kV a new g-r noise component appears which is related to electric field distribution among anode, condensers, stigmators and objective.

Název v anglickém jazyce

Noise of Low-Energy Electron Beam

Popis výsledku anglicky

Noise diagnostics were performed on a tungsten hair-pin cathode operating in a vacuum (3 · 10(-3) Pa). The cathode operates in thermal emission mode at several temperatures based on the level of heating. Several acceleration voltages have been used starting at 5 kV, 10 kV and 20 kV up to 30 kV. There were two modes-with and without electron beam scanning. Both setups were compared from the point of view of the noise spectral density value. Shot noise is about one order below the current noise spectral density of the electron beam. Therefore, in this case the shot noise spectral density can be neglected. Noise spectral density is 1/f type at the frequency band 0.1 to 10 Hz for cathode with thin film of tungsten oxides. For accelerating voltage from 5 to 20 kV noise in the frequency band from 2 to 20 Hz can be described by the g-r noise with noise spectral density proportional to square of a beam current. At accelerating voltage 30 kV a new g-r noise component appears which is related to electric field distribution among anode, condensers, stigmators and objective.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

<a href="/cs/project/TE01020118" target="_blank" >TE01020118: Elektronová mikroskopie</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název statě ve sborníku

2015 International Conference on Noise and Fluctuations (ICNF) (Proceedings IEEE)

ISBN

978-1-4673-8335-6

ISSN

—

e-ISSN

—

Počet stran výsledku

4

Strana od-do

—

Název nakladatele

IEEE

Místo vydání

Piscataway

Místo konání akce

Xi’an

Datum konání akce

2. 6. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000380427600048