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We propose the design of a Resonance SPin-echo spECtrometer for exTremestudies, RESPECT, that is ideally suited for the exploration of non-dispersiveprocesses such as diffusion, crystallization, slow dynamics, tunnelingprocesses, crystal electric field excitations, and spin fluctuations. It is avariant of the conventional neutron spin-echo technique (NSE) by i) replacingthe long precession coils by pairs of longitudinal neutron spin-echo coilscombined with RF-spin flippers and ii) by stabilizing the neutron polarizationwith small longitudinal guide fields that can in addition be used as fieldsubtraction coils thus allowing to adjust the field integrals over a range of 8orders of magnitude. Therefore, the dynamic range of RESPECT can in principlebe varied over 8 orders of magnitude in time, if neutrons with the requiredenergy are made available. Similarly as for existing NSE-spectrometers, spinecho times of up to approximately 1 microsecond can be reached if thedivergence and the correction elements are properly adjusted. Thanks to theoptional use of neutron guides and the fact that the currents for thecorrection coils are much smaller than in standard NSE, intensity gains of atleast one order of magnitude are expected , making the concept of RESPECT alsocompetitive for operation at medium flux neutron sources. RESPECT can also beoperated in a MIEZE configuration allowing the investigation of relaxationprocesses in depolarizing environments as they occur when magnetic fields areapplied at the sample position, i.e. for the investigation of the dynamics offlux lines in superconductors, magnetic fluctuations in ferromagneticmaterials, and samples containing hydrogen.

RESPECT: Neutron Resonance Spin-Echo Spectrometer for Extreme Studies