Evaluation of HOPG mounting possibilities for multiplexing spectrometers

Four different methods for mounting HOPG analyzer crystals on Si holders have been evaluated in the design process of the new multiplexing spectrometer CAMEA. Contrary to neutron optics used in standard spectrometers, the new instrument concept employs a series of analyzer segments behind each other...

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Published inNuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 858; pp. 30 - 35
Main Authors Groitl, Felix, Bartkowiak, Marek, Bergmann, Ryan M., Birk, Jonas Okkels, Markó, Márton, Bollhalder, Alex, Graf, Dieter, Niedermayer, Christof, Rüegg, Christian, Rønnow, Henrik M.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 21.06.2017
Subjects
HOPG
Multiplexing
Neutron optics
Neutron scattering
Neutron spectrometer
Neutrons
Multiplexing
Neutrons
Neutron optics
Neutron scattering
Neutron spectrometer
HOPG
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Summary:Four different methods for mounting HOPG analyzer crystals on Si holders have been evaluated in the design process of the new multiplexing spectrometer CAMEA. Contrary to neutron optics used in standard spectrometers, the new instrument concept employs a series of analyzer segments behind each other where the neutrons have to pass through the bonding compound of the different analyzer crystals. The different methods, namely screws, shellac, indium soldering and clips, have been evaluated with regards to background, transmission, cooling, activation and handling. The results presented here will give valuable input for future CAMEA-type spectrometers currently planned and designed at various neutron sources.
ISSN:0168-9002
1872-9576
DOI:10.1016/j.nima.2017.03.031