#### Filter Results:

- Full text PDF available (7)

#### Publication Year

1993

2016

- This year (0)
- Last five years (3)

#### Publication Type

#### Co-author

#### Publication Venue

Learn More

- H. Scott Dumas, James A. Ellison, Mathias Vogt
- SIAM J. Applied Dynamical Systems
- 2004

{ This paper describes a numerical method which calculates the characteristic parameters of coupled transmission lines. Under the quasi-TEM assumption, the eld-describing diierential equation is transformed into an integral equation. This one is numerically solved with the Boundary Element Method (BEM). The advantage of the integral equation method is that… (More)

For slowly evolving, discrete-time-dependent systems of difference equations (iterated maps), we believe the simplest means of demonstrating the validity of the averaging method at first order is by way of a lemma that we call Besjes' inequality. In this paper, we develop the Besjes inequality for identity maps with perturbations that are (i) at low-order… (More)

A veriication of calculated electrical parameters of transmission lines on printed circuit boards is presented. Furthermore, the innuence of common manufacturing processes on the principle cross section of transmission lines and the resulting electrical parameters is subject of the investigations. With regard to existing manufacturing tolerances a… (More)

A fast method, working in the frequency domain, has been developed for the simulation of the wave propagation on coupled microstrip lines. Precondition is the validity of the transmission line theory, that means a transversal electromagnetic wave{propagation on the transmission line systems is assumed. Then, the dynamic behaviour of lossless transmission… (More)

We present a mathematical analysis of planar motion of energetic electrons moving through a planar dipole undulator, excited by a fixed planar polarized plane wave Maxwell field in the X-Ray FEL regime. Our starting point is the 6D Lorentz system, which allows planar motions , and we examine this dynamical system as the wave length λ of the traveling wave… (More)

- Georg H Hoffstaetter, Mathias Vogt
- Physical review. E, Statistical, nonlinear, and…
- 2004

When polarized particles are accelerated in a synchrotron, the spin precession can be periodically driven by Fourier components of the electromagnetic fields through which the particles travel. This leads to resonant perturbations when the spin-precession frequency is close to a linear combination of the orbital frequencies. When such resonance conditions… (More)

- Tim Plath, Philipp Amstutz, +13 authors Tim Laarmann
- Journal of synchrotron radiation
- 2016

Free-electron lasers (FELs) generate femtosecond XUV and X-ray pulses at peak powers in the gigawatt range. The FEL user facility FLASH at DESY (Hamburg, Germany) is driven by a superconducting linear accelerator with up to 8000 pulses per second. Since 2014, two parallel undulator beamlines, FLASH1 and FLASH2, have been in operation. In addition to the… (More)

We present a mathematical analysis of planar motion of energetic electrons moving through a planar dipole undulator, excited by a fixed planar polarized plane wave Maxwell field in the x-ray free electron laser (FEL) regime. Our starting point is the 6D Lorentz system, which allows planar motions, and we examine this dynamical system as the wavelength of… (More)

- ‹
- 1
- ›