| Autor: |
A. De Laulany, Nigel J. Rhodes, R.G. Cooper, J.-F. Clergeau, A. Kastenmueller, K. Zeitelhack, Hiroshi Takahashi, T.L. van Vuure, F. Millier, G.J. Mc Intyre, Claude Fermon, G. Manzin, Flora Meilleur, Graham C. Smith, László Rosta, S.T.G. Fetal, P. Van Esch, F.A.F. Fraga, Erik Schooneveld, J. Darpentigny, Bruno Guerard, R. Kampmann, J. C. Buffet |
| Rok vydání: |
2005 |
| Předmět: |
|
| Zdroj: |
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 554:392-405 |
| ISSN: |
0168-9002 |
| DOI: |
10.1016/j.nima.2005.08.018 |
| Popis: |
Parallax error severely limits the use of gas detectors for neutron and X-ray single-crystal diffractometry. This is particularly the case in Neutron Macromolecule Crystallography (NMC), where a large solid angle is needed. High-resolution cylindrical detectors based on Neutron Image Plates provide a large angular coverage but they are gamma sensitive and do not allow time-resolved measurements. We describe the principle of a gas counter, the multi-blade Microstrip Gas Chamber (MSGC), which has the potential to design parallax-free cylindrical detectors. It contains radial MSGC plates, providing a partitioning of the gas volume and a segmentation of the signal readout. The axial coordinate is measured by reading out the charge signal on the anodes and the trans-axial coordinate is deduced from the electron drift distance measured optically using the time difference between the primary and the avalanche light. Expected characteristics are a sub-millimeter position resolution, a sub-microsecond time resolution, and a global counting rate greater than 10 7 s - 1 . |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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