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WFRF:(Ahnesjö Jonas)
 

Sökning: WFRF:(Ahnesjö Jonas) > Ahnesjö Anders Professor > Ion recombination i...

  • Andersson, Jonas,1975-Umeå universitet,Radiofysik (författare)

Ion recombination in liquid ionization chambers : development of an experimental method to quantify general recombination

  • BokEngelska2013

Förlag, utgivningsår, omfång ...

  • Umeå :Umeå universitet,2013
  • 76 s.
  • electronicrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:DiVA.org:umu-68942
  • ISBN:9789174596076
  • ISBN:9789174596083
  • https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-68942URI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

Ingår i deldatabas

Klassifikation

  • Ämneskategori:vet swepub-contenttype
  • Ämneskategori:dok swepub-publicationtype

Serie

  • Umeå University medical dissertations,0346-6612 ;1567

Anmärkningar

  • An experimental method (the two-dose-rate method) for the correction of general recombination losses in liquid ionization chambers has been developed and employed in experiments with different liquids and radiation qualities. The method is based on a disassociation of initial and general recombination, since an ionized liquid is simultaneously affected by both of these processes.The two-dose-rate method has been compared to an existing method for general recombination correction for liquid ionization chambers, and has been found to be the most robust method presently available.The soundness of modelling general recombination in liquids on existing theory for gases has been evaluated, and experiments indicate that the process of general recombination is similar in a gas and a liquid. It is thus reasonable to employ theory for gases in the two-dose-rate method to achieve experimental corrections for general recombination in liquids. There are uncertainties in the disassociation of initial and general recombination in the two-dose-rate method for low applied voltages, where initial recombination has been found to cause deviating results for different liquids and radiation qualities.Sensitivity to ambient electric fields has been identified in the microLion liquid ionization chamber (PTW, Germany). Experimental data may thus be perturbed if measurements are conducted in the presence of ambient electric fields, and the sensitivity has been found to increase with an increase in the applied voltage. This can prove to be experimentally limiting since general recombination may be too severe for accurate corrections if the applied voltage is low.

Ämnesord och genrebeteckningar

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

  • Tölli, Heikki,Filosofie doktorUmeå universitet,Radiofysik(Swepub:umu)heto0001 (preses)
  • Johansson, Lennart (preses)
  • Ahnesjö, Anders,ProfessorUppsala universitet (opponent)
  • Umeå universitetRadiofysik (creator_code:org_t)

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