Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8181741 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2012 | 7 Pages |
Abstract
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 Ï=93.3±2.8μm from a value of Ï=229.5±6.8μm found using the FPGA logic of the previous system. This represents an improvement of nearly 60%.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
K. Hattori, J.D. Parker, C. Ida, K. Ito, H. Kubo, K. Miuchi, T. Tanimori, M. Takata,