Line spread function study of kinestatic charge detectors operating at high gas pressures

G. C. Giakos, P. Ghotra, B. Pillai, S. Chowdhury, S. Vedantham, F. A. Dibianca, L. M. Jordan, S. Devidas, S. Nagarajan, R. J. Endorf

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


A systematic study of the line spread function (LSF) in the drift direction of a high-pressure ionization chamber for x-ray detection and imaging is presented. Experimental results, obtained by operating a KCD krypton-filled detector at pressures up to 60 atm and constant electric field-to-gas pressure ratio, indicate that the width of the LSF increases with the drift distance and decreases with increasing pressure, both effects being quite large. The hypothesis of this paper is that, at sufficiently high pressures, formation of clusters of molecular ions with a unique or narrowed mobility distribution take place by means of energy exchange mechanisms. Therefore, the LSF of the ionic signal becomes narrower and the FWHM of the ionic signal improves significantly with increasing gas pressure. This research is aimed at investigating methods to improve the spatial resolution as part of the development of a large field-of-view prototype digital radiographic scanner operating on kinestatic charge detection principles,

Original languageEnglish (US)
Pages (from-to)343-358
Number of pages16
JournalJournal of X-Ray Science and Technology
Issue number4
StatePublished - Dec 1996
Externally publishedYes

ASJC Scopus subject areas

  • Radiation
  • Instrumentation
  • Radiology Nuclear Medicine and imaging
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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