We apply novel bunch forms for e$cient laser cooling of fast stored ion beams at the Heidelberg Test Storage Ring. 9Be` ions are longitudinally con"ned in barrier buckets providing free motion of the cooled ions inside the bucket (quasi-coasting beam). The implementation of laser cooling in barrier buckets is described, and longitudinal dynamics of laser cooling is compared to electron cooling....

Angiogenesis plays a key role in tumour progression, and undergoes structural changes associated to tumour biology itself. Although vessel density can be easily evaluated in brain tumours using a traditional immuno-histochemical approach, other parameters of conceptual/biological interest, such as the complex patterns of vascular growth, cannot be fully understood using a traditional bi-dimensi...

This paper investigates the effect of real-time control system computational delay on the performance of a hybrid adaptive cruise control (ACC) system during braking/coasting scenarios. A hierarchical hybrid ACC system with a finite state machine (FSM) at the highrank and a nonlinear sliding mode controller (SMC) at the low-rank is designed based on a vehicle dynamics model with a brake-by-wire...

The influence of space charge on emittance growth is studied in simulations of a coasting beam exposed to a strong octupolar perturbation in an otherwise linear lattice, and under stationary parameters. We explore the importance of selfconsistency by comparing results with a non-self-consistent model, where the space charge electric field is kept “frozen-in” to its initial values. For Gaussian ...

Near-minimum-time attitude maneuvers of space structures as well as ground-based test articles are considered. The switching nature of the controls for rigid-body maneuvers is illustrated using a control cube and a critical control axis. The presence of torque smoothing and, where appropriate, gravitational effects and connections to other bodies are explicitly included in the mathematical mode...

Space-charge effects play an important role in high intensity and brightness particle accelerators. These were generally studied self-consistently by solving the Vlasov-Poisson equations using a particle-in-cell method accelerator community. In this paper, we propose alternative to simulate space-charge accelerator. Instead of equations, proposed approach solves Schr\"odinger-Poisson study Usin...

With given trip time on each section, conventional train energy-efficient operation problem optimizes the reference speed profile such that the energy consumption for tracking the profile is minimized. Alternatively, this study aims to solve its anti-problem that minimizes the trip time under certain energy constraint, namely the train energyconstraint operation problem. In particular, this stu...