## 1 Introduction  
Neutron scattering techniques are well-established routines for the structural and molecular analysis of matter, and they cover a broad field of scientific interest [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]. With techniques such as neutron reflectometry (NR) [11, 12, 13], which is used for the investigation of vertical thin film compositions, or grazing-incidence small-angle neutron scattering (GISANS) [14, 15, 16, 17], which is used for the investigation of lateral thin film morphology and its order, two powerful methods to study thin films exist. GISANS probes a large material volume by measuring the scattered signal from a neutron beam impinging under a shallow incident angle (typically below 0.5\({}^{\circ}\)). Therefore, good statistics over a larger sample area can be achieved while also providing additional enhancements of the surface correlated and sub-surface structural information of the thin film. Nevertheless, for thin film samples, the sampled material volume is still orders of magnitude smaller than for bulk samples. Thus, in conjunction with the available neutron flux, times in GISANS measurement are typically in the range of hours. Only a limited number of facilities worldwide provide the necessary resources and expertise for neutron scattering, and, as such, beamtime is a highly limited resource--even more so with older facilities, e.g., the BER II [17], the Orphee [18], and the JEEP II [19], being shut down. A new facility like the European spallation source (ESS), which is under construction in Lund, Sweden, will provide an increased flux [20], which is needed for methods such as GISANS. The ESS instrument suite [21] covers a broad field of scientific interests, and, amongst others, it offers two small-angle scattering instruments suitable for investigating soft matter thin films, namely the LOKI [22] and the SKADI [23] instruments. Moreover, the ESS aims to provide a pulsed neutron beam up to 100 times more brilliant than what is currently available and would thus greatly reduce measurement times. This might allow for even more flux-dependent applications of grazing-incidence methods, e.g., in spectroscopy [24]. With an increased flux, the ratio between setup time and actual measurements increases, which makes reducing the setup times a major tool for the overall efficiency of instruments. In order to optimize setup procedures, the FlexiProb project aims for a flexible and fast sample environment exchange system. In this joint project, three independent sample environment systems addressing different scientific topics were designed by the groups of Bielefeld, Darmstadt, and Munich, with the Munich system being presented here. They share an identical base framework that enables a quick and easy exchange mechanism between the setups. It consists of a kinematic mounting system that connects to the floor, a vertical lifting table for an initial vertical alignment, and appropriate spacers with a breadboard on top. The accuracy of the kinematic mounting system is better than 0.1 mm in all directions. On top of the breadboard, the sample environment--which, in our case, consists of the various components for GISANS measurements on soft matter thin films--is assembled. All technical equipment can be installed and adjusted before the experiment and initial alignment and preparation procedures can be done off-instrument. This allows one to quickly and efficiently exchange complete and complex setups by exchanging the whole system (mounting system, lifting table, and breadboard with measurement equipment) in a single step and by reducing or even avoiding the need for adjustments and alignments after the setup is installed at the instrument. It is crucial for the sample environment to provide stable control over temperature and humidity because various soft matter systems are highly sensitive to these parameters [25; 26; 27; 28; 29]. There is a wide range of humidity chambers used for controlling the vapor composition around a sample during neutron scattering experiments [30; 31; 32].