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Magnetic Signature Identification using Pareto optimization


Christopher Riley, Engineering Manager, Cobham Technical Services Abstract Determining the topology of a naval vessel from its measured magnetic signature is a classic inverse problem – what is the source of the observed response? This paper explores an alternative to classical inverse methods with a technique that is used in design optimization. Pareto optimization is [...]

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Transient Simulation of the ISIS Synchrotron Singlet Quadrupoles using Opera-3d


Authors: I. Rodriguez* , ISIS, Rutherford Appleton Laboratory, STFC, Didcot, UK Abstract: Type QX106 singlet magnets are AC defocusing quadrupoles used in the ISIS main synchrotron ring. They have an aperture of 202 mm and a yoke length of 303 mm, so the end effects are significant. The iron poles and the yoke are asymmetric [...]

Techpaper


Measurement, Simulation and Calculation Using Fourier Transformation of Iron Losses for Electrical Steel Sheets with Higher Frequency and Temperature Effects


Authors: N. Yogal, C. Lehrmann, M. Henke and H. Zheng Abstract: The losses present in electrical machines are of major concern in modern industrial applications, very high speed drives, aerospace applications and the automotive industry. This paper presents the magnetic characterization of non-oriented steel sheets used for manufacturing permanent magnet synchronous machines and synchronous reluctance machines when these […]

Techpaper


Topology comparison of ferrite magnet synchronous machines with consideration of low inertia


Authors: Christian Heister and Markus Henke Abstract: In order to replace rare-earth magnets five different machine topologies are considered, designed and studied in detail. With a synchronous reluctance machine (SRM) a machine without magnets is included in this comparison. The improvement by the insertion of cheap ferrite magnets in a SRM is studied by designing […]

Techpaper


Optimization in Tri-Axial Degaussing System Design


Authors: Vishal Modagekar, Department of Electrical Engineering Veermata Jijabai Technological Institute Matunga, Mumbai 400019, Abdul Karim Shaikh and Navdeep Singh Abstract: Contemporary ships, made of ferromagnetic materials, under the influence of Earth’s magnetic field produce an underwater magnetic anomaly. This anomaly, often called the magnetic signature, compromises the stealth and safety of the ship and needs to be minimized. […]

Techpaper


Superconductivity for accelerators for medical applications


CIEMAT, in collaboration with HEPTech, EUCARD2, CDTI, GSI and EEN recently held a workshop on “Superconductivity for accelerators for medical applications”. In our everyday environment, compact superconducting accelerators produce short-life radionucleides to make diagnoses and proton and ion beams to treat tumours by hadrontherapy. Superconductivity has become a key technology of particle accelerators, helping their […]

Techpaper


Focussing Magnets for Drift Tube Linac


Authors: Vikas Teotia , Sanjay Malhotra , Kumud Singh , U.Mahapatra , S.Bhattacharya , G.P.Srivastava2 Shweta Roy , Piyush Jain , P. Singh and S. Kailas Abstract: A linear accelerator comprising of Radio frequency quadrupole (RFQ) and drift tube linac (DTL) is being developed at BARC. The Alvarez type CW DTL accelerates protons from energy […]

Techpaper


Electromagnetic design and development of a combined function horizontal and vertical dipole steerer magnet for medium energy beam transport line


Authors: Singh, Kumud (Bhabha Atomic Research Centre, Mumbai (India)); Itteera, Janvin (Bhabha Atomic Research Centre, Mumbai (India)); Ukarde, Priti (Bhabha Atomic Research Centre, Mumbai (India)); Teotia, Vikas(Bhabha Atomic Research Centre, Mumbai (India)); Kumar, Prashant (Bhabha Atomic Research Centre, Mumbai (India)); Malhotra, Sanjay (Bhabha Atomic Research Centre, Mumbai (India)); Taly, Y.K. (Bhabha Atomic Research Centre, Mumbai […]

Techpaper


Design and development of permanent magnet based focusing lens for J-band klystron


Authors: Kumud Singh, Janvin Itteera and Priti Ukarde, all at Control Instrumentation Division, Bhabha Atomic research Centre, Mumbai, India Abstract: Applying permanent magnet technology to beam focusing in klystrons can reduce their power consumption and increase their reliability of operation. Electromagnetic design of the beam focusing elements, for high frequency travelling wave tubes, is very critical. The […]

Techpaper


MRI main field magnets


Authors: Johan Overweg, Philips Research, Hamburg, Germany Abstract: MRI scanners come in various shapes and they are based on several distinctly different technologies to create the static background field (B0). Whatever the shape and the technology, all B0 magnets for MRI have in common that they generate a strong field, which has, within narrow tolerances, […]

Techpaper


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