| Autor: |
D. Gutknecht, S. Mohamed, P. Dressler, R. Henck, H. Oyanagi, K. Kasai, S. Ogawa, M.-O. Lampert, C. Fonne |
| Rok vydání: |
2003 |
| Předmět: |
|
| Zdroj: |
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 513:340-344 |
| ISSN: |
0168-9002 |
| DOI: |
10.1016/j.nima.2003.08.059 |
| Popis: |
For high throughput/energy-resolution fluorescence X-ray detection in X-ray absorption spectroscopy (XAS), a novel Ge pixel array detector (PAD) with 100 segments has been developed. Using a monolithic approach, a high packing density (88%) with nearly perfect commission rate (99%) were achieved, resulting in a dramatic improvement in packing density compared to the close-packed multi-element detector (57%). Two types of PAD was built with the pixel thickness of 7.5 and 10 mm. Each segment has an active area of 22 mm 2 . The average energy resolution at 5.9 keV was ca. 220 eV (6 μs shaping time) and 240 eV (0.5 μs shaping time). High efficiency in X-ray detection in a wide energy range (5–60 keV) was confirmed. The present data acquisition system, CAMAC-based hybrid electronics, is capable of independent energy-analysis and recording all channels with a maximum 100 kcps per channel or 10 MHz in total. Elimination of elastic and inelastic scattering improved the systematic error in XAS, as demonstrated by an XAS application to a photo-induced phase transition. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect