A5102936850- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Gyrotron and Vacuum Electronics Research
- Injection Molding Process and Properties
- High-Voltage Power Transmission Systems
- Advanced machining processes and optimization
- Music Technology and Sound Studies
- Music and Audio Processing
- Metallurgy and Material Forming
- Manufacturing Process and Optimization
- Pulsed Power Technology Applications
- Plasma Diagnostics and Applications
- Power System Optimization and Stability
- Magnetic confinement fusion research
- HVDC Systems and Fault Protection
- Flow Measurement and Analysis
- Particle physics theoretical and experimental studies
- Advanced Battery Technologies Research
- Additive Manufacturing and 3D Printing Technologies
- Fluid Dynamics and Mixing
- Brake Systems and Friction Analysis
- Architecture and Computational Design
- Neuroscience and Music Perception
- Dust and Plasma Wave Phenomena
RWTH Aachen University
2023-2024
Universität der Bundeswehr München
2024
Dr. August Wolff (Germany)
2023
TU Wien
2023
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
2021
Fermi National Accelerator Laboratory
1985-2018
Fermi Research Alliance
2002-2007
Supercon (United States)
1986
Technical Design (United States)
1986
Universities Research Association
1979
The beam-beam effects have been the dominating sources of beam loss and lifetime limitations in Tevatron proton-antiproton collider [V. Shiltsev et al., Phys. Rev. ST Accel. Beams 8, 101001 (2005)]. Electron lenses were originally proposed for compensation electromagnetic long-range head-on interactions proton antiproton beams 2, 071001 (1999).]. Results successful employment two electron built installed are reported by al. [Phys. Lett. 99, 244801 (2007); New J. 10, 043042 (2008)] Zhang...
A novel modulator has been designed, built and tested for the TESLA test facility. This e{sup +} {minus}} accelerator concept uses superconducting RF cavities requires 2ms of power at 10 pps. As final will require several hundred modulators, a cost effective, space saving high efficiency design is desired. used modest size switched capacitor bank that droops approximately 20% during pulse. large droop compensated by use resonant LC circuit. The connected to side pulse transformer primary...
Profile extrusion is a continuous production process for manufacturing plastic profiles from molten polymer. Especially interesting the design of die, through which melt pressed to attain desired shape. However, due an inhomogeneous velocity distribution at die exit or residual stresses inside extrudate, final shape manufactured part often deviates one. To avoid these deviations, can be computationally optimized, has already been investigated in literature using classical optimization...
This paper explores the potential of Physics-Informed Neural Networks (PINNs) to serve as Reduced Order Models (ROMs) for simulating flow field within stirred tank reactors (STRs). We solve two-dimensional stationary Navier-Stokes equations a geometrically intricate domain and explore methodologies that allow us integrate additional physical insights into model. These approaches include imposing Dirichlet boundary conditions (BCs) strongly employing decomposition (DD), with both overlapping...
In this study, we investigate the potential of fast-to-evaluate surrogate modeling techniques for developing a hybrid digital twin steel-reinforced concrete beam, serving as representative example civil engineering structure. As surrogates, two distinct models are developed utilizing physics-informed neural networks, which integrate experimental data with given governing laws physics. The (sensor data) is obtained from previously conducted four-point bending test. first model predicts...
Abstract Profile extrusion is a continuous production process for manufacturing plastic profiles from molten polymer. Especially interesting the design of die, through which melt pressed to impart desired shape. However, due an inhomogeneous velocity distribution at die exit or residual stresses inside extrudate, final shape manufactured part often deviates one [1]. To avoid these deviations, we want optimize flow channel computationally. This has already been investigated in literature...
These Power Supplies were designed to power the accumulator and debuncher storage rings at Fermi National Accelerator Laboratory Antiproton Source. The are both large acceptance 8 GeV rings. ring has most stringent requirements since it will be required store beams for periods in excess of twenty four (24) hours. In order ensure long term beam stability, resonances up eleven (11) must avoided. Because this tuned stability requirement, supplies which three main quadrupole dipole busses...
The theory of positive column is generalized including additional non-emitting electrodes within the plasma and at wall. Taking into consideration cylindrical spherical geometries yields a current carrying sheaths presheaths asymmetric double probes. Single probe operation in bounded plasmas can be approximated. A steady state compressible two-fluid model used throughout plasma. Various conditions for operations described as collision dominated collisionless plasmas, thick thin sheath regime...
A new 30 kA, V dc Power System was designed, built, and commissioned at Fermilab for testing Superconducting High Field Magnets. This system has been successfully supporting operations the Magnet Test Facility since April 2002. It is based on six commercial 150 kW Energy Industries power supply modules following in-house modules: 720 Hz filters, two 15 kA/1 kV solid-state dump switch, a 3 MJ/30 resistor. Additional electronic components were designed built to provide precise current...
To better control the beam position, tune, and chromaticity in Fermilab Booster synchrotron, a new package of six corrector elements has been designed, incorporating both normal skew orientations dipole, quadrupole, sextupole magnets. The devices are under construction will be installed 48 locations accelerator. Each these 288 magnets individually powered. controlled using operator programmed current ramps designed specifically for each type acceleration cycle. This paper provides an...
This paper explores the potential of Physics-Informed Neural Networks (PINNs) to serve as Reduced Order Models (ROMs) for simulating flow field within stirred tank reactors (STRs). We solve two-dimensional stationary Navier-Stokes equations a geometrically intricate domain and explore methodologies that allow us integrate additional physical insights into model. These approaches include imposing Dirichlet boundary conditions (BCs) strongly employing decomposition (DD), with both overlapping...
In this study, we investigate the potential of fast-to-evaluate surrogate modeling techniques that fuse sensor data with non-sensor information, i.e. underlying physics, for developing a hybrid digital twin steel-reinforced concrete beam, serving as representative example civil engineering structure such bridge. Bridges are critical infrastructures require continuous monitoring and maintenance predictive power to ensure their safety longevity. Therefore, there is high demand models combine...
This paper explores the application of physics-informed neural networks (PINNs) to tackle forward problems in 3D contact mechanics, focusing on small deformation elasticity. We utilize a mixed-variable formulation, enhanced with output transformations, enforce Dirichlet and Neumann boundary conditions as hard constraints. The inherent inequality constraints particularly Karush-Kuhn-Tucker (KKT) conditions, are addressed soft by integrating them into network's loss function. To KKT we...
A one-dimensional steady state three-gas model for compressible media is used to formulate a boundary value problem the axial neutral gas transport in low-pressure positive column. by-pass tube configuration considered. The electron temperature and drift velocity, both values on axis, component of electric field occur as eigenvalues. radial profiles number densities, velocities electrons, ions atoms, potential are calculated. It shown that flow caused by difference momentum transfer between...
Along with the protection of magnets and power converters, we have added a section on personnel because this is our highest priority in design operation systems. Thus, topics are people, magnet loads (protected from powering equipment), including normal conducting superconducting magnets.
A two-year Large Aperture Quadrupole (WQB) Project was completed in the summer of 2006 at Fermilab. [1] Nine WQBs were designed, fabricated and bench-tested by Technical Division. Seven them installed Main Injector other two for spares. They perform well. The aperture increase meets design goal perturbation to lattice is minimal. machine acceptance injection extraction regions increased from 40p 60p mm-mrad. This paper gives a brief report operation performance these magnets. Details can be...
A concept for a two-stage injection-locked CW magnetron intended to drive Superconducting Cavities (SC) intensity-frontier accelerators has been proposed. The considers two magnetrons in which the output power differs by 15-20 dB and lower being frequency-locked from an external source locks higher magnetron. can be used as RF Fermilab's Project-X feed separately each of 1.3 GHz SC 8 GeV pulsed linac. We expect output/locking ratio about 30-40 assuming operation mode with pulse duration ~ ms...
The solid-state Marx generator modulates the anode of electron gun to produce beam pulses in second Tevatron Electron Lens (TEL2). It is capable driving 60 pF terminal with 600 ns up 6 kV a p.r.r. 50 kHz. rise and fall times are 150 ns. Stangenes industries developed unit working on version which will go higher voltage have ability vary its output 396 intervals over 5 mus pulse.
An attempt was made to verify that SSC (Superconducting Super Collider) magnets (dipoles) can be installed, leak checked, cooled LHe temperature, energized, and quenched as a string in tunnel type environment. The data given here were obtained during controls system check-out run. This run basically had all of the proper accelerator well as, background, an independent magnet test facility monitor protection. Early are presented on heat loads some circuits quench performance two strings used....