New Paper on Co-Simulation for Quench Protection at CERN

Our paper on “Optimized Field/Circuit Coupling for the Simulation of Quenches in Superconducting Magnets” has been accepted by the IEEE Journal on Multiscale and Multiphysics Computational Techniques. The paper proposes an optimised waveform-relaxation approach for the simulation of magnetothermal transients in superconducting magnets. The work has been carried in the framework STEAM together with CERN.

DFG Funds Research on Isogeometric BEM at TU Darmstadt

I am proud to announce that DFG grants funding for our research on the simulation of superconducting cavities with isogeometric boundary elements “IGA-BEM”. The project is supervised by Stefan Kurz (KU 1553/4-1) and myself (SCHO1562/3-1). The aim of the joint project is the highly accurate simulation of resonant frequencies of superconducting cavities in particle accelerators. Since the simulation accuracy heavily depends on the geometry representation it will be described and discretized with Non-Uniform Rational B-Splines, which allow an exact description of the computer aided design.

Talk on the simulation of electrical machines by Lars Kielhorn

logo_tailsitDr. Lars Kielhorn from TailSiT GmbH, Graz (Austria) talks on 25 Jul 2016, 16:15–17:45 (room S4|10-314) in the seminar on Computational Engineering. Abstract: Electrical machines commonly consist of moving and stationary parts, e.g., an electric motor features a rotor and a stator. If volume based numerical schemes such as the Finite Element Method (FEM) are applied the electromagnetic simulation of such devices is a challenging task since the variation of the geometrical configuration needs to be incorporated into the numerical scheme. Continue reading

Compile ONELAB on the Mac

ONELAB is an interface to finite element software, i.e., Gmsh and GetDP, for engineering applications. Homebrew science has been updated such that you can easily compile your own build on the Mac (after having installed brew):

> brew tap homebrew/science
> brew install gmsh --HEAD --with-fltk --with-petsc --with-slepc --with-opencascade
> brew install getdp --HEAD --with-petsc --with-slepc

1. Workshop of the network “UQ for Cavities”

The first workshop of the DFG Scientific Network “Uncertainty quantification techniques and stochastic models for superconducting radio frequency cavities” takes place in Darmstadt fron 09.-10.07.2014. Participants from DESY (Hamburg), CERN (Geneva) and the Universities of Darmstadt, Rostock and Milano discuss about the sources of uncertainty in the simulation of accelerator cavities.

Recent Octave for Mac OS X (Update)

First you need to install brew. The new build script is now included in the science tap. The following line compiles a development build from the GUI branch
brew tap homebrew/science
brew install octave --HEAD
or
brew install octave
to give you the latest 3.8.1 release with some Mac-specific patches. If you like to have a nice bundle in /Application you can get that by
brew install https://raw.githubusercontent.com/schoeps/homebrew-science_apps/master/octave-app.rb
brew linkapps

19th German-American Frontiers of Science Symposium

Humboldt-FoundationFrom April 3-6 I will be at the 19th German-American Frontiers of Science Symposium. I will talk about our current approaches to quantify uncertainties in accelerator magnets. From the official announcement:
The Alexander von Humboldt Foundation and the U.S. National Academy of Sciences collaborate to organize the German-American Frontiers of Science Symposia. In the past annually, now on a biennial schedule the symposia bring together approximately 70 outstanding young scientists (with up to 15 years of post-doc experience). The participants, half from the United States and half from Germany, represent all disciplines within the natural sciences.
Update: Sadly, I cannot attend due the strike of the pilot’s union.

Student Grant for Jacopo (CEFC 2014)

Jacopo Corno was awarded a student grant from CEFC 2014 for his contribution “Isogeometric Simulation of Lorentz Detuning in Superconducting Accelerator Cavities” (joint work with Politecnico Milano, Carlo de Falco). The paper discusses the frequency shift in a superconductive cavity induced by mechanical deformation due to the electromagnetic pressure. A highly accurate solution of the coupled electromagnetic-mechanic problem is obtained by isogeometric analysis and compared to an approach based on traditional finite elements.