Noise of Low-Energy Electron Beam

Result code in 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>
Alternative codes found
RIV/00216305:26220/15:PU119935
Result on the web
<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>

Result language
angličtina
Original language name
Noise of Low-Energy Electron Beam
Original language description
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.
Czech name
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Czech description
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Project
<a href="/en/project/TE01020118" target="_blank" >TE01020118: Electron microscopy</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
2015 International Conference on Noise and Fluctuations (ICNF) (Proceedings IEEE)
ISBN
978-1-4673-8335-6
ISSN
—
e-ISSN
—
Number of pages
4
Pages from-to
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Publisher name
IEEE
Place of publication
Piscataway
Event location
Xi’an
Event date
Jun 2, 2015
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000380427600048

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