The Effect of Space Charge due to the Auto-Ionization of Neutral, Hydrogenic States in Point-Contact Germanium Detectors at MilliKelvin Temperatures - new
D. Faiez, N. Mirabolfathi, B. Sadoulet, K. M. Sundqvist
Department of Physics, University of California - Berkeley, Berkeley, CA, USA
Department of Electrical & Computer Engineering, Texas A&M University, College Station, TX, USA
A class of semiconducting detectors, operated at temperature T~50mK, has direct application to the search for dark matter particle, when are able to simultaneously measure both the ionization and phonons created by particle interactions. We explore the effect of space charge accumulation in a germanium p-type point contact detector which arises due to the auto-ionization of hydrogenic ...
S. Musa and M. Sadiku
College of Engineering, Prairie View A&M University, Prairie View, TX, USA
Due to the complexity of electromagnetic modeling, researchers and scientists always look for development of accurate and fast methods to extract the parameters of electronic interconnects and package structures. In this paper, we illustrate modeling of multiconductor interconnects in multilayered dielectric media using COMSOL Multiphysics and the finite element method. We specifically determine ...
Verification and Time Performance Analysis of COMSOL v3.5a for Solving the Electromagnetic Problem in a Superconductor Slab
J. Lloberas, J. López, E. Bartolomé, and X. Granados
Universitat Politècnica de Catalunya, Barcelona, Spain
Escola Universitària Salesiana de Sarrià, Barcelona, Spain
Institut de Ciència de Materials de Barcelona, Barcelona, Spain
Numerical analysis based on finite element method (FEM) represents a powerful approach to solve electromagnetic problems. For instance, FEM methods have been broadly used to calculate the critical state current distribution in high temperature superconductors of various geometries. In the near future, we intend to develop a tool in COMSOL v3.5a for the analysis of power applications, such as ...
R. Kroczek, and J. Domin
Silesian University of Technology, Gliwice, Poland
This paper describes consecutive stages of design and construction of electromagnetic gun manufactured at the Silesian University of Technology. It gives insight into current knowledge about such a launcher. The computer model was elaborated in COMSOL Multiphysics version 3.5. The numerical analysis was carried out a 3-dimensional space. The physical model was build up and comparison of the ...
Y. He, R. Nilssen
Department of Electric Power Engineering, Norwegian University of Science and Technology, Trondheim, Norway
Ferrofluids have been successfully used in the seals for rotary shafts, but few studies focus on the reciprocating motion seals. Since the completely different operational regimes, previous experiences on the rotary motions could not be directly applied on the cases for reciprocating shafts. In this study, we present a simplified model to describe the process that a shaft linearly moving in a ...
Zeller, P.1, Rabl, M.2
1 FH-Wels, Studiengangsleiter Automatisierungstechnik
2 FH-Wels, Studiengangsleiter Innovations- und Produktmanagement
Moderne Überspannungsableiter bestehen aus einer halbleitenden Zinkoxidkeramik, die auf-grund ihrer nichtlinearen elektrischen Charakteristik ein spannungsbegrenzendes Verhalten zeigt. Aufgrund des negativen Temperaturkoeffizienten des Sperrstromes, kann es zu einem „thermischen Davonlaufen“ nach einem zu hohen Energieeintrag bei einem Ableitvorgang kommen. Die Belastbarkeitsgrenze muss ...
Determination of Electric Potential Distribution and Cell Resistance of a Uranium Electrorefining Cell
S.P. Ruhela, S. Agarwal, B. Muralidharan, B.K. Sharma, B.P. Reddy, G. Ravisankar, K. Nagarajan, C.A. Babu, and P. Kalyanasundaram
Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, Tamil Nadu, India
Electrorefining is an electrolytic process for obtaining high purity metal. In this process the impure metal is made anode and the high purity metal is deposited on cathode. Electrorefining is a key step in pyrochemical reprocessing of spent fuel from metal fuel fast reactors. Development of an electrorefining cell, in which processing of 10 kg of simulated spent fuel will be demonstrated, is ...
C. Crawford, and D. Wagner
University of Kentucky
Traditionally the design cycle for magnetic fields involves guessing at a reasonable conductor and magnetic material configuration, using finite element analysis (FEA) software to calculate the resulting field, modifying the configuration, and iterating to produce the desired results. We take the opposite approach of specifying the required magnetic field, imposing it as a boundary condition on ...
Simulation of a Magnetic Induction Method for Determining Passive Electrical Property Changes of Human Trunk Due to Vital Activities
H. Mahdavi, J. Rosell Ferrer
Universitat Politècnica de Catalunya, Barcelona, Spain
The human body consists of many different types of tissues each with specific passive electrical properties. Vital activities lead to a characteristic change of these properties and geometrical changes. Magnetic induction is a non-contact method which can be used to determine these changes. The method is based on the creation of a primary magnetic field that will produce eddy currents in the ...
An Automatic Modeling Approach for Optimized Positioning of an Electrostimulative Implant in the Human Femoral Head - new
Y. Su, D. Kluess, W. Mittelmeier, M. Ellenrieder, U. van Rienen, R. Bader
Department of Orthopaedics, University of Rostock, Rostock, Germany
Institute of General Electrical Engineering, University of Rostock, Rostock, Germany
Introduction Electromagnetic stimulation is a common therapy to support bone healing in cases of avascular necrosis or pseudarthrosis. An electrostimulative screw implant (Asnis III s-series screw in Figure 1) is used to stimulate bone regeneration in the treatment of femoral head avascular necrosis. To enable positive outcome of the treatment, optimal positioning of the electric implant is ...