CASCADE - a multi-layer Boron-10 neutron detection system

6th European Conference on Neutron Scattering

Köhli, M.^1 ; Klein, M.^1,5 ; Allmendinger, F.^1 ; Perrevoort, A.-K.^1 ; Schröder, T.^2 ; Martin, N.^2,3 ; Schmidt, C.J.^4,5 ; Schmidt, U.^1

Physikalisches Institut, Heidelberg University, Im Neuenheimer Feld 226, Heidelberg

D-69120, Germany^1

Heinz Maier-Leibnitz Zentrum (MLZ) and Physik Department, Technische Universitat München, Lichtenbergstr. 1, Garching

85748, Germany^2

CEA, Centre de Saclay, DSM, IRAMIS, Laboratoire Léon Brillouin, Gif-sur-Yvette

91191, France^3

GSI Detector Laboratory, Planckstr. 1, Darmstadt

64291, Germany^4

CDT CASCADE Detector Technologies GmbH, Hans-Bunte-Str. 8-10, Heidelberg

69123, Germany^5

关键词: Alternative technologies;    Detection efficiency;    Gas electron multipliers;    Neutron detection system;    Neutron spin echo spectroscopies;    Precise determinations;    Spatially resolved;    Spin echo techniques;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/746/1/012003/pdf
DOI  :  10.1088/1742-6596/746/1/012003

来源: IOP

【 摘 要 】

The globally increased demand for helium-3 along with the limited availability of this gas calls for the development of alternative technologies for the large ESS instrumentation pool. We report on the CASCADE Project-a novel detection system, which has been developed for the purposes of neutron spin echo spectroscopy. It features 2D spatially resolved detection of thermal neutrons at high rates. The CASCADE detector is composed of a stack of solid10B coated Gas Electron Multiplier foils, which serve both as a neutron converter and as an amplifier for the primary ionization deposited in the standard Argon-CO2counting gas environment. This multi-layer setup efficiently increases the detection efficiency and serves as a helium-3 alternative. It has furthermore been possible to extract the signal of the charge traversing the stack to identify the very thin conversion layer of about 1 micrometer. This allows the precise determination of the time-of-flight, necessary for the application in MIEZE spin echo techniques.