Millimeter-wave (mmWave) communication has been considered as a promising communication system with large spectrum resource available. In mmWave communication systems, in order to overcome severe path-loss, beamforming technology is required to form narrow beam and generate high directional antenna gain. This will result in frequent beam handoff and severe link blockage, especially in mobile sc...

Positron emission particle tracking measures the trajectory of a single radioactively labelled tracer by coincident detection emitted annihilation photons. The technique enables non-invasive study dense opaque flows, with acting as small neutrally buoyant flow-follower. University Cape Town has established PEPT facility at iThemba LABS, utilising particles produced through radiochemical methods...

The brightness and quality of electron beams in linacbased light sources are ultimately limited by the properties of the beam in the injector. It is thus important to have knowledge of the phase space distribution in addition to the rms emittance to provide an insight into high beam brightness formation mechanisms. A tomography technique has been used to reconstruct the transverse phase space o...

MARYLIE/IMPACT (ML/I) is a hybrid code that combines the beam optics capabilities of MARYLIE with the parallel Particle-In-Cell capabilities of IMPACT. In addition to combining the capabilities of these codes, ML/I has a number of powerful features, including a choice of Poisson solvers, a fifth-order rf cavity model, multiple reference particles for rf cavities, a library of soft-edge magnet m...

An ion optical solution for beam tracking of moving tumours with scanned ion beams is currently being investigated at GSI [1, 2]. Thereby the longitudinal compensation is achieved by using the deflection magnets of the therapy beam line to direct the particle beam to different positions on a static energy degrader with variable thickness, which is installed upstream of the scanning magnets. Thu...

Performance of the triple-GEM detector with optimized 2-D readout in high intensity hadron beam. Abstract Multiple-GEM detectors are considered to be good candidates for tracking devices in experiments with high hadronic background. We present the results of the triple-GEM detectors beam test in a high intensity pion beam. The detectors had an optimized two-dimensional readout with minimized st...

We present a new concept for a beam position monitor with the unique ability to map particle beam position to a measurable wavelength. Coupled with an optical spectrograph, this beam position monitor is capable of subnanometer resolution. We describe one possible design, and through finite-element frequency-domain simulations, we show a resolution of 0.7 nm. Because of its high precision and ul...

In light of the success of 3D printing using fused-deposition modeling or higher-resolution variants with lasers applicable to polymers and metals, one may wonder whether an analogous approach exists on the nanometer scale. Indeed it does. With the aid of focused particle beam-induced deposition (FPBID) it is possible to create solid-state structures on the nanoscale. However, in contrast with ...