Refinement of position resolution in two-dimensional X-ray detector based on μ-PIC gaseous detector

K. Hattori, J. D. Parker, C. Ida, K. Ito, H. Kubo, K. Miuchi, T. Tanimori, M. Takata

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


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%.

Original languageEnglish
Pages (from-to)1-7
Number of pages7
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Publication statusPublished - 2012 May 11
Externally publishedYes


  • Gaseous detector
  • Micro-pattern detector
  • X-ray detector

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


Dive into the research topics of 'Refinement of position resolution in two-dimensional X-ray detector based on μ-PIC gaseous detector'. Together they form a unique fingerprint.

Cite this