#### Filter Results:

- Full text PDF available (4)

#### Publication Year

2009

2015

- This year (0)
- Last 5 years (6)
- Last 10 years (8)

#### Publication Type

#### Co-author

#### Journals and Conferences

#### Key Phrases

Learn More

- Timm Faulwasser, Dieter Lens, Christopher M. Kellett
- 2014 IEEE Conference on Control Applications (CCA…
- 2014

We present a design of a predictive control scheme for longitudinal beam dynamics in heavy ion synchrotrons. Specifically, we consider a linear-quadratic model predictive control (MPC) approach, whereby the quadratic program is solved via a fast gradient method. Furthermore, we investigate whether the fast gradient method allows for real-time feasible… (More)

- Dieter Lens
- Automatisierungstechnik
- 2013

The possibilities of digital control systems for FAIR, based on digital signal processors (DSPs) and field programmable gate arrays (FPGAs), [1], raise questions concerning the optimal control algorithms for the RF control loops of heavy-ion synchrotrons. From a control theory point of view, the system comprising the RF cavity control loops and the… (More)

Progress in digital hardware solutions such as field programmable gate arrays (FPGA) has raised the question of how to design the algorithms of RF feedback. This especially applies to the feedback of the RF cavities and the longitudinal beam feedback for SIS100. For example, FPGAs currently allow FIR (finite impulse response) filter lengths of several tens… (More)

- Dieter Lens, Harald Klingbeil, Thomas Gussner, Andreea Popescu, Kerstin Gross
- 2010 IEEE International Conference on Control…
- 2010

The stability of RF (radio frequency) control systems is an essential part of particle accelerator technology. In accelerators, such as heavy-ion synchrotrons, RF feedback systems are used to damp longitudinal oscillation modes of the particle beam. Longitudinal modes have been analyzed in detail by accelerator physicists and there exists a closed theory… (More)

- Jochen Grieser, Daniel Bug, Dieter Lens, Harald Klingbeil, J. Adamy
- 21st Mediterranean Conference on Control and…
- 2013

The bunched particle beam in a synchrotron can perform various longitudinal oscillation modes of which the dipole mode occurs most frequently. Although naturally damped by Landau damping, these oscillations can become unstable if driven accordingly. In any case Landau damping is accompanied by filamentation of the bunch which leads to rms emittance blow up… (More)

- Jürgen Adamy, Dieter Lens, Oliver Sawodny
- Automatisierungstechnik
- 2014

- Dieter Lens, Timm Faulwasser, Christopher M. Kellett
- Automatisierungstechnik
- 2015

Hadron synchrotrons accelerate protons and heavy ions to very high energies. The stabilization of the longitudinal beam dynamics in these particle accelerators is a demanding control problem since typical sample times of the beam-feedback loop are on the order of several μs to several hundred ns. This work examines if model predictive control is a suitable… (More)

- ‹
- 1
- ›