72 citations · 138 across the 21 of their papers we have counts for
6 papers · 1 filter
Longitudinal phase-space matching between radio-frequency systems with different harmonic numbers and accelerating voltages
Volker Ziemann
We describe a simple mechanism to transform bunches with matched longitudinal phase-space distributions from one RF system to a matched distribution of a second RF system operating…
Strap-on magnets: a framework for rapid prototyping of magnets and beam lines
Volker Ziemann
We describe a framework to assemble permanent-magnet cubes in 3D-printed frames to construct dipole, quadrupole, and solenoid magnets, whose field, in the absence of iron, can be c…
Closed-form expressions for the magnetic field of permanent magnets in three dimensions
Volker Ziemann
We derive a closed-form expression of the magnetic field of a finite-size current sheet and use it to calculate the field of permanent magnets, which are modeled through their surf…
MATLAB Simulations of the Helium Liquefier in the FREIA Laboratory
Elias Waagaard, Roger Ruber, Volker Ziemann
We describe simulations that track a state vector with pressure, temperature, and gas flow through the helium liquefier in the FREIA laboratory. Most components, including threeway…
Noninvasively improving the orbit-response matrix while continuously correcting the orbit
Ingvar Ziemann, Volker Ziemann
Based on continuously recorded beam positions and corrector excitations from, for example, a closed-orbit feedback system we describe an algorithm that continuously updates an esti…
Accelerator Development at the FREIA Laboratory
R. Ruber, A. K. Bhattacharyya, D. Dancila +22
The FREIA Laboratory at Uppsala University focuses on superconducting technology and accelerator development. It actively supports the development of the European Spallation Source…