Multichannel linear detector for x-ray spectroscopy

• Published in: Optoelectronics, instrumentation, and data processing Vol. 45; no. 3; pp. 227 - 233
• Main Authors: Labusov, V. A., Mazalov, L. N., Fomenko, S. V., Selyunin, D. O., Bekhterev, A. V.
• Format: Journal Article
• Language: English
• Published: Heidelberg Allerton Press, Inc 01.06.2009
• Subjects: Lasers; Nanotechnologies in Optic and Electronics; Optical Devices; Optics; Photonics; Physics; Physics and Astronomy; linear x-ray detector; emission spectra; photodiode array; x-ray spectroscopy; absorption spectra
• ISSN: 8756-6990; 1934-7944
• DOI: 10.3103/S8756699009030029

This paper considers a new linear multichannel x-ray detector designed on the basis of a BLPP-369M4 silicon photodiode array (2612 photodiodes, array pitch 12.5 µm, height 4 mm, and dynamic range 10 4 ). The structure and characteristics of the multichannel detector are given, along with the K α 1,2, K β 1 , and K β 5 x-ray emission lines and a K-edge absorption spectrum of metallic copper recorded on a universal URS-2I spectrometer using this detector. The resolution and the signal/noise ratio of these spectra are superior to those of spectra recorded by an SRPP-21 gas ionization counter at the same recording time. The detector has a spatial resolution of 20 µm and an x-ray detection limit to equal 1 quantum at λ = 1.54 Å. It is suitable for studying the fine structure of absorption spectra at 1–10 Å.