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Design of vacuum components for FERP-technique characterization system

Groeneveld, G. (2017) Design of vacuum components for FERP-technique characterization system.

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Abstract:n the laboratory of DMI, the display division of CTI, research is carried out to obtain the work function of materials using the FERP-method. For this method is an ultra-high vacuum (UHV) environment needed. The laboratory of DMI currently has a FERP-setup that is specified for high vacuum (HV). This setup functioned as a ‘proof of principle’, in order to show that the laboratory is able to carry out this kind of research. With the successful outcome of earlier FERP-experiments, the research can now be improved. A concept is created for an UHV-system that enables more accurate results. With the new system, DMI wants to achieve the pressure level of 5x10-12 Torr. A CAD-model of the new UHV-concept is used by DMI to acquire budget for the required commercial components. In early 2016, all commercial components have arrived and need to be connected by specified nipples. The existing CAD-model featured these connections, but not yet dimensioned and detailed for manufacturing. These detailed designs are provided within this internship. First, a study into vacuum principles and equipment is carried out to be able to describe the complete FERP-system accurately. Here it is described that vacuum is the state of a gas with a pressure level below the atmospheric pressure. In vacuum technology, there are different regimes distinguished, based on a difference in molecular behavior. HV and UHV are the two regimes with the lowest pressures, below 1x10-6 Torr. The difference between vacuum regimes implies the use of different pumping- and measurement principles. This means that a range of pumps and gauges needs to be used to reach the desired UHV-level. Besides this, different commercial components as gate valves, a TSP-Cryoshroud, spheres and a transfer arm are used in the setup. After the study of vacuum principles and equipment, the required designs for the connections are detailed. These designs are subject to industry standards and limited dimensions. The designs for 5 nipples and 1 crossing are provided. The commercial components and newly designed connections are combined in a new CAD-model of the complete setup. The final setup must be placed onto an existing support structure in the laboratory of DMI. With CAD-software it is checked that this is possible. With the technical drawings for the connections and the complete CAD-model, the new FERP-system can be built. This is done by DMI in the future, as soon as required budget for manufacturing is available.
Item Type:Internship Report (Master)
Clients:
CTI Renato Archer, Brazil
Faculty:ET: Engineering Technology
Subject:52 mechanical engineering
Programme:Mechanical Engineering MSc (60439)
Link to this item:http://purl.utwente.nl/essays/71925
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