Tajmar M.,TU Dresden |
Plesescu F.,Fotec GmbH
Applied Physics Letters
A liquid-metal-ion-source with indium propellant using an uncoated fused quartz glass microcapillary was manufactured and tested. The extremely thin capillary enabled a very low ignition voltage of 1000 V and a high electrical impedance ideal for clustering. However, low bonding forces between indium and glass resulted in a rather short lifetime of little more than 10 min. The use of pure glass as emitter material may enable liquid ion source chips with high current densities in the future. © 2013 American Institute of Physics. Source
Buldrini N.,Fotec GmbH
Transient mass fluctuations are predicted by Woodward in accelerated bodies which are subjected to a change of their internal energy. This sort of effects goes under the name of Mach effects. Proving their existence would lead to a relatively fast development of rapid space transportation systems. Several tests have been pursued by Woodward himself and others, the results being sometimes elusive and contrasting. The potential of this research field, however, justifies further investigation. Until now, the tests have been conducted using exclusively capacitors as means of energy storage, and the acceleration has been supplied by the Lorentz force or by a piezoelectric actuator. The present work explores the possibility to search for Mach effects in bodies subjected to impulsive forces caused by a nonuniform magnetic field. Such magnetic field would provide both the acceleration and the change in the internal energy of the body, required for the expression of Mach effects. It will be shown that an impulsive (bell shaped) force applied to a special sort of test body should produce an anomalous final speed of the body itself. A qualitative analysis is presented and a possible experimental setup is outlined. ©2011 Published by Elsevier B.V. Selection and/or peer-review under responsibility of Institute for Advanced Studies in the Space, Propulsion and Energy Sciences. Source
Agency: Cordis | Branch: FP7 | Program: CP | Phase: SPA-2007-2.2-02 | Award Amount: 3.63M | Year: 2008
Space activities and applications play an important role in strengthening the competitiveness of Europe by scientific progress in the knowledge-based society, and by providing strategic influence and security. Major successful space missions under European leadership have placed ESA and its Member States, the European science community at the forefront. To continue this path Europe must have independent and competitive access to space. With the ITAR (International Traffic in Arms Regulations) continuing to impede the acquisition of US components, Europe thus needs to develop an assured independent source of propulsion components. Today space craft propulsion relies heavily on toxic and carcinogenic hydrazines as propellants. Hydrazine itself is widely used as monopropellant and MMH and UDMH is used as bipropellant fuel. These propellants are a threat to people and the environment, and handling these toxic propellants impedes costly safety measurers. As new ideas and new technologies emerged in the last years, and as the concerns about both the environment and the handling of carcinogenic propellants significantly increase, the so-called Green Propellants show potential improvements with respect to performance and cost. The goal of this project is thus to select the most promising green liquid propellant candidate/s and to push the propulsion technology to the level needed to prove that Green Propellant technology is feasible and competitive. Research and development on Green Propellants and adjacent propulsion technology in Europe is geographically fragmented and insufficiently funded. With the present consortium, some of the key-players in Europe will harmonize their capabilities to meet this demanding goal.
Agency: Cordis | Branch: FP7 | Program: CP-IP | Phase: NMP-2007-3.5-2 | Award Amount: 8.47M | Year: 2008
The objective of the project COTECH is to investigate new approaches of -manufacturing based on advanced technology convergence processes and to propose hybrid solutions for high added value cost effective -manufacturing emerging applications. The main goals of COTECH are to develop: (1) -replication technologies underpinned by emerging tool-making technologies for processing multi-material components and creating: a) 3D -components using high throughput multi-material -injection moulding with sub-m resolution; b) 2D -components using direct multi-material hot or UV embossing with a sub-200nm resolution. (2) Radically new replication convergent technologies combining the capabilities of -injection or embossing to a complementary activation step to create intelligent devices in a single process step: a) Hybrid processes based on -injection moulding using modules of e.g coating and compression injection moulding, to provide functionality to -devices, such as active coatings and combination of micro and nano features in a single step; b) Ultimately the hybrid processes based on -injection with embossing will be validated. This will offer a very high throughput multimaterial -injection that will enable the fabrication of 3D high aspect ratio -parts, complemented by an embossing step to allow ultra precise 2D features. (3) Global process chains with increased MTBF (50%) and fabrication of high quality products. This requires innovative non-destructive inspection solutions and simulation models. (4) High added value -devices with advanced functionalities. COTECH proposes to validate industrially the new technology convergence processes with 8 demonstrators representing the most emergent industrial sectors (transport, biomedical, energy). The expected market for the industry exceeds 1 Billion . COTECH will also address the problem of knowledge fragmentation by activating a polymer -manufacturing sub-platform as support to MINAM.
Agency: Cordis | Branch: H2020 | Program: RIA | Phase: COMPET-01-2014 | Award Amount: 3.79M | Year: 2015
The project deals with the replacement of hydrazine within space propulsion systems. It improves significantly the ADN-based propellants currently existing and enables the replacement of hydrazine within the whole operational area of currently used hydrazine propulsion systems. The objectives of the project are: 1.) Replacing hydrazine by adapting the propellant to currently existing materials available in Europe 2.) Development of a cold-start capable ignition system to replace hydrazine in the whole operational area 3.) Verification of the technology within battleship unit(s) to reach a Technology Readiness Level of 5 4.) Adapted numerical models to describe the processes within such propulsion systems. To reach these objectives, the following development will be done within the project A) Propellant development in order to obtain maximal temperatures within the combustion chamber that can be withstand with currently available materials in Europe. Additionally, the propellant will have increased specific impulses in relation to hydrazine. B) Development of catalytic ignition systems to withstand the thermal and mechanical shocks while having cold-start capability C) Design and testing of the corresponding battleship units within the project to verify the achievement of the project experimentally (reach TRL of 5) D) Generating validation results for future purposes to adapt the technology to future purposes. Therefore, the relation to the work programme Alternative to hydrazine in Europe is achieved by a replacement of the currently hydrazine based propulsion system with a green propellant system with higher specific impulse.