%0 Artikel
%@ 0168-9002
%A Buffet, J.C.
%A  Clergeau, J.F.
%A  Cooper, R.G.
%A  Darpentigny, J.
%A  De Laulany, A.
%A  Fermon, C.
%A  Fetal, S.
%A  Fraga, F.
%A  Guerard, B.
%A  Kampmann, R.
%A  Kastenmueller, A.
%A  Mc Intyre, G.J.
%A  Manzin, G.
%A  Meilleur, F., Millier, F.
%A  Rhodes, N.
%A  Rosta, L.
%A  Schooneveld, E.
%A  Smith, G.C.
%A  Takahashi, H.
%A  Esch, P.van
%A  Vuure, T.L.van
%A  Zeitelhack, K.

%D 2005
%J Nuclear Instruments and Methods in Physics Research  A
%N 1345
%P 392 - 405 
%R doi:10.1016/j.nima.2005.08.018
%T Advances in detectors for single crystal neutron diffraction
%U http://dx.doi.org/10.1016/j.nima.2005.08.018
1-3 
%X 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 s-1.