title: CAMEA--A novel multiplexing analyzer for neutron spectroscopy.
abstract: The analyzer detector system continuous angle multiple energy analysis will be installed on the cold-neutron triple-axis spectrometer RITA-2 at SINQ, PSI. CAMEA is optimized for efficiency in the horizontal scattering plane enabling rapid and detailed mapping of excitations. As a novelty the design employs a series of several sequential upward scattering analyzer arcs. Each arc is set to a different, fixed, final energy and scatters neutrons towards position sensitive detectors. Thus, neutrons with different final energies are recorded simultaneously over a large angular range. In a single data-acquisition many entire constant-energy lines in the horizontal scattering plane are recorded for a quasi-continuous angular coverage of about 60°. With a large combined coverage in energy and momentum, this will result in a very efficient spectrometer, which will be particularly suited for parametric studies under extreme conditions with restrictive sample environments (high field magnets or pressure cells) and for small samples of novel materials. In this paper we outline the concept and the specifications of the instrument currently under construction.
authors.affiliation: École Polytechnique Fédérale de Lausanne, Laboratory for Quantum Magnetism, 1015 Lausanne, Switzerland.
authors.forename: Felix
authors.initials: F
authors.lastname: Groitl
authors.affiliation: Paul Scherrer Institute, Laboratory for Scientific Developments and Novel Materials, 5232 Villigen, Switzerland.
authors.forename: Dieter
authors.initials: D
authors.lastname: Graf
authors.affiliation: Paul Scherrer Institute, Laboratory for Neutron Scattering and Imaging, 5232 Villigen, Switzerland.
authors.forename: Jonas Okkels
authors.initials: JO
authors.lastname: Birk
authors.affiliation: Paul Scherrer Institute, Laboratory for Neutron Scattering and Imaging, 5232 Villigen, Switzerland.
authors.forename: Márton
authors.initials: M
authors.lastname: Markó
authors.affiliation: Paul Scherrer Institute, Laboratory for Scientific Developments and Novel Materials, 5232 Villigen, Switzerland.
authors.forename: Marek
authors.initials: M
authors.lastname: Bartkowiak
authors.affiliation: Paul Scherrer Institute, Laboratory for Scientific Developments and Novel Materials, 5232 Villigen, Switzerland.
authors.forename: Uwe
authors.initials: U
authors.lastname: Filges
authors.affiliation: Paul Scherrer Institute, Laboratory for Neutron Scattering and Imaging, 5232 Villigen, Switzerland.
authors.forename: Christof
authors.initials: C
authors.lastname: Niedermayer
authors.affiliation: Paul Scherrer Institute, Laboratory for Neutron Scattering and Imaging, 5232 Villigen, Switzerland.
authors.forename: Christian
authors.initials: C
authors.lastname: Rüegg
authors.affiliation: École Polytechnique Fédérale de Lausanne, Laboratory for Quantum Magnetism, 1015 Lausanne, Switzerland.
authors.forename: Henrik M
authors.initials: HM
authors.lastname: Rønnow