Imaging parameters of a kinestatic charge detector containing Kr, NH3, and CO2 at 80 atm

Frank A. DiBianca; Sreenivas Devidas; George C. Giakos; Shashidhar Kollipara; Senthilkumar Nagarajan; Qian Peng

doi:10.1117/12.176569

26 May 1994 Imaging parameters of a kinestatic charge detector containing Kr, NH3, and CO2 at 80 atm

Frank A. DiBianca, Sreenivas Devidas, George C. Giakos, Shashidhar Kollipara, Senthilkumar Nagarajan, Qian Peng

Proceedings Volume 2132, Clinical Applications of Modern Imaging Technology II; (1994) https://doi.org/10.1117/12.176569
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

In this paper, modulation transfer function and image noise measurements are presented for Kinestatic Charge Detectors employing high-pressure Kr gas doped with NH₃ and CO₂. Kr improves spatial resolution over Xe because, at equal x-ray mean free path, it has both reduced fluorescence reabsorption and reduced electron range. NH₃ eliminates mobility dispersion (disparate ionic mobilities from multiple charge carriers) caused by gas impurities. CO₂ reduces electron attachment and thus ion-ion recombination because it lowers the electron temperature, thereby increasing electron drift velocity via the Ramsauer effect.

Citation Download Citation

Frank A. DiBianca, Sreenivas Devidas, George C. Giakos, Shashidhar Kollipara, Senthilkumar Nagarajan, and Qian Peng "Imaging parameters of a kinestatic charge detector containing Kr, NH3, and CO2 at 80 atm", Proc. SPIE 2132, Clinical Applications of Modern Imaging Technology II, (26 May 1994); https://doi.org/10.1117/12.176569

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