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  • Li, P. F. (författare)

Stable transmission of low energy electrons in glass tube with outer surface grounded conductively shielding

  • Artikel/kapitelEngelska2022

Förlag, utgivningsår, omfång ...

  • Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences,2022

Nummerbeteckningar

  • LIBRIS-ID:oai:gup.ub.gu.se/316408
  • https://gup.ub.gu.se/publication/316408URI
  • https://doi.org/10.7498/aps.71.20212036DOI
  • https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-204986URI

Kompletterande språkuppgifter

  • Språk:engelska

Ingår i deldatabas

Klassifikation

  • Ämneskategori:ref swepub-contenttype
  • Ämneskategori:art swepub-publicationtype

Anmärkningar

  • The electron microbeam is useful for modifying certain fragments of biomolecule. It is successful to applythe guiding effect to making the microbeam of positively charged particles by using single glass capillary.However, the mechanism for the electron transport through insulating capillaries is unclear. Meanwhile,previous researches show that there are oscillations of the transmission intensity of electrons with time in theglass capillaries with outer serface having no grounded conductive shielding, So, the application of glasscapillary to making the microbeam of electrons is limited. In this paper, the transmission of 1.5 and 0.9 keV electrons through the glass capillary without/with thegrounded conductive-coated outer surface are investigated, respectively. This study aims to understand themechanism for low energy electron transport in the glass capillaries, and find the conditions for the steadytransport of the electrons. Two-dimensional angular distribution of the transported electrons and its timeevolution are measured. It is found that the intensity of the transported electrons with the incident energythrough the glass capillaries for the glass capillaries without and with the grounded conductive-coated outersurface show the typical geometrical transmission characteristics. The time evolution of the 1.5- keV electrontransport presents an extremely complex variation for the glass capillary without the grounded conductive-coated outer surface. The intensity first falls, then rises and finally oscillates around a certain mean value.Correspondingly, the angular distribution center experiences moving towards positive-negative-settlement. Incomparison, the charge-up process of the 0.9 keV electron transport through the glass capillary with thegrounded conductive-coated outer surface shows a relatively simple behavior. At first, the intensity declines rapidly with time. Then, it slowly rises till a certain value and stays steady subsequently. The angulardistribution of transported electrons follows the intensity distribution in general, but with some delay. It quicklymoves to negative direction then comes back to positive direction. Finally, it regresses extremely slowly andends up around the tilt angle. To better understand the physics behind the observed phenomena, the simulationfor the interaction of the electrons with SiO2 material is performed to obtain the possible deposited chargedistribution by the CASINO code. Based on the analysis of the experimental results and the simulated chargedeposition, the conditions for stabilizing the electron transport through glass capillary arepresented.

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Yuan, H. (författare)
  • Cheng, Z. D. (författare)
  • Qian, L. B. (författare)
  • Liu, Z. L. (författare)
  • Jin, B. (författare)
  • Ha, S. (författare)
  • Wan, C. L. (författare)
  • Cui, Y. (författare)
  • Ma, Y. (författare)
  • Yang, Z. H. (författare)
  • Lu, DiGothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)(Swepub:gu)xludib (författare)
  • Schuch, ReinholdStockholms universitet,Fysikum(Swepub:su)schuch (författare)
  • Li, M. (författare)
  • Zhang, H. Q. (författare)
  • Chen, X. M. (författare)
  • Göteborgs universitetInstitutionen för fysik (GU) (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:Acta Physica Sinica: Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences71:71000-3290

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