Measurement of the Transverse Diffusion Coefficient of Charge in Liquid Xenon

Abstract:

Liquid xenon (LXe) is a very attractive material as a detection medium for ionization detectors due to its high density, high atomic number, and low energy required to produce electron-ion pairs. Therefore it has been used in several applications, like γ detection or direct detection of dark matter. Now Subatech is working on the R & D of LXe Compton telescope for 3γ medical imaging, which can make precise tridimensional localization of a (β⁺, γ) radioisotope emitter. The diffusion of charge carriers will directly affect the spatial resolution of LXe ionization signal. We will report how we measure the transverse diffusion coefficient for different electric field (0.5 ~ 1.2 kV/cm) by observing the spray of charge carriers on drift length varying until 12 cm. With very-low-noise front-end electronics and complete Monte-Carlo simulation of the experiment, the values ​​of transverse diffusion coefficient are measured precisely.

• Periodical: Defect and Diffusion Forum (Volumes 326-328)
• Pages: 567-572
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.326-328.567
• Online since: April 2012
• Authors: W. T. Chen, H. Carduner, J. P. Cussonneau, J. Donnard, S. Duval, A. F. Mohamad-Hadi, J. Lamblin, O. Lemaire, P. Le Ray, E. Morteau, T. Oger, L. Scotto-Lavina, J. S. Stutzmann, D. Thers
• Keywords: Compton Telescope, Diffusion Coefficient, Medical Imaging, Noble-Liquid Detector (Scintillation and Ionization), Photon Detectors, Xenon

References

[1] E. Aprile and T. Doke: Reviews of Modern Physics Vol. 82 (2010), p. (2053).

[2] E. Aprile et al. , arXiv: 1104. 2549.

[3] S. Duval et al.: Journal of Instrumentation Vol. 4 (2009), p.12008.

[4] A. Incicchitti et al.: Nuclear Instruments and Methods in Physics Research A Vol. 289 (1990), p.236.

[5] T. Doke: Nuclear Instruments and Methods Vol. 196 (1982), p.87.

[6] G. Bakale et al.: J. Phys. Chem. Vol. 80 (1976), p.2556.

[7] O. Gevin et al.: IEEE Nuclear Science Symposium Conference Record Vol. 1 (2005), p.433.

[8] E. Aprile et al.: Nucl. Instrum. Meth. A Vol. 302 (1991), p.177.

[9] L. S. Miller et al.: Physical Review Vol. 166 (1968), p.871.