TY - JOUR
T1 - Refinement of position resolution in two-dimensional X-ray detector based on μ-PIC gaseous detector
AU - Hattori, K.
AU - Parker, J. D.
AU - Ida, C.
AU - Ito, K.
AU - Kubo, H.
AU - Miuchi, K.
AU - Tanimori, T.
AU - Takata, Masaki
PY - 2012/5/11
Y1 - 2012/5/11
N2 - We have successfully refined the position resolution of a two-dimensional X-ray photon-counting detector based on the micro-pixel gas chamber (μ-PIC) by measuring the charge distribution of an X-ray interaction without the use of analog-to-digital converters (ADCs). By updating the logic of the Field Programmable Gate Arrays (FPGAs) included in the data acquisition system, we were able to acquire the pulse widths, or time-above-threshold of the μ-PIC signals, by measuring both the leading and trailing edges of the digital signals. By using the measured widths to estimate the peak of the charge distribution, the position resolution of our detector was improved to σ=93.3±2.8μm from a value of σ=229.5±6.8μm found using the FPGA logic of the previous system. This represents an improvement of nearly 60%.
AB - We have successfully refined the position resolution of a two-dimensional X-ray photon-counting detector based on the micro-pixel gas chamber (μ-PIC) by measuring the charge distribution of an X-ray interaction without the use of analog-to-digital converters (ADCs). By updating the logic of the Field Programmable Gate Arrays (FPGAs) included in the data acquisition system, we were able to acquire the pulse widths, or time-above-threshold of the μ-PIC signals, by measuring both the leading and trailing edges of the digital signals. By using the measured widths to estimate the peak of the charge distribution, the position resolution of our detector was improved to σ=93.3±2.8μm from a value of σ=229.5±6.8μm found using the FPGA logic of the previous system. This represents an improvement of nearly 60%.
KW - Gaseous detector
KW - Micro-pattern detector
KW - X-ray detector
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U2 - 10.1016/j.nima.2012.01.043
DO - 10.1016/j.nima.2012.01.043
M3 - Article
AN - SCOPUS:84856374841
VL - 674
SP - 1
EP - 7
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
SN - 0168-9002
ER -