26 May 1994 Imaging parameters of a kinestatic charge detector containing Kr, NH3, and CO2 at 80 atm
Author Affiliations +
Proceedings Volume 2132, Clinical Applications of Modern Imaging Technology II; (1994); doi: 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.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Frank A. DiBianca, Sreenivas Devidas, George C. Giakos, Shashidhar Kollipara, Senthilkumar Nagarajan, 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); doi: 10.1117/12.176569; https://doi.org/10.1117/12.176569
PROCEEDINGS
11 PAGES


SHARE
KEYWORDS
Krypton

Sensors

Monte Carlo methods

Ions

Modulation transfer functions

Quantum efficiency

Spatial resolution

Back to Top