CAMEA — a multiplexing analyzer concept for extreme environment spectrometers

by Dr Christoph Niedermayer (PSI)

Thursday 12 Apr 2018, 14:00 → 15:00 Europe/Berlin

03.33 (UYA)

In my talk I will give a brief overview of some of our activities within the upgrade program for the Swiss Spallation Neutron Source SINQ and our involvement in the instrumentation of the European Spallation Source ESS. This includes new neutron guides based on the latest supermirror technology and the implementation of novel instrument concepts. I will then focus on the analyzer concept CAMEA (Continuous Angle Multiple Energy Analysis), which is designed for high neutron detection efficiency in the horizontal scattering plane [1]. The design employs a series of several upward scattering analyzer arcs. Each arc is set to a different fixed final energy and scatters towards position sensitive detectors. Thus, neutrons with different final energies are collected simultaneously over a large angular range. This will open new possibilities for parametric studies under extreme conditions with restrictive sample environments (high field magnets or pressure cells) and for the study of small samples. Apart from the ongoing upgrade of the Rita-II spectrometer at SINQ, a CAMEA – like spectrometer MULTIFLEXX has been realized at HZB and FRM II [2]. Other implementations of the CAMEA concept will include the spectrometer BAMBUS for PANDA [3] and the inverse time of flight spectrometer BIFROST [4] at ESS.

[1] F. Groitl et. al., Review of Scientific Instruments 87, 035109 (2016)
[2] F. Groitl et al., Scientific Reports 7, 13637 (2017)
[3] J. A Lim et al., Journal of Physics: Conference Series 592, 012145 (2015). [4] P.G. Freeman et. al., EPJ Web of Conferences 83, 03005 (2015)