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Observation of positronium annihilation in the 2S state: towards a new measurement of the 1S-2S transition frequency
(2015)Hyperfine Interactions ~ Proceedings of the International Conference on Exotic Atoms and Related Topics (EXA 2014)We report the first observation of the annihilation of positronium from the 2S state. Positronium (Ps) is excited with a two-photon transition from the 1S to the 2S state where its lifetime is increased by a factor of eight compared to the ground state due to the decrease in the overlap of the positron electron wave-function. The yield of delayed annihilation photons detected as a function of laser frequency is used as a new method of ...Conference Paper -
An Investigation on the Applicability of the Integrated Method for Multi-Carrier Energy Flow Analysis
(2018)2018 IEEE Power & Energy Society General Meeting (PESGM)The integrated energy system (IES) combined with electricity and heat networks is a research hotspot in energy field in recent years. As the foundation of security and economy analysis of IES, the steady-state multi-carrier energy flow (MEF) analysis is important but difficult to converge. An integrated method for solving MEF has been presented and adopted in some published literatures. In this paper, we investigate the integrated method ...Conference Paper -
Optimal Design of a Transformer-based Solid-State Pulse Modulator with a Damping Network for Ultra-Fast Rise Times
(2021)2021 23rd European Conference on Power Electronics and Applications (EPE'21 ECCE Europe)This paper presents an optimization procedure for a transformer-based solid-state pulse modulator with an additional damping network at the load. The design of the pulse transformer and the damping network are combined in the procedure, so that pulses with pulse lengths in the μs-range with a fast rise time and a compact transformer volume can be achieved.Conference Paper -
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Exercise specific Loading Conditions and Movements of Squats, Lunges Goodmornings and Deadlifts
(2015)Conference Paper -
Geodetic Monitoring of Digitally Fabricated Structures Early After Construction
(2020)FIG Working Week 2020. ProceedingsThe construction industry is currently in a process of increased automation and digitization which has an impact on all phases of a building's lifetime, including design, fabrication, assembly, and maintenance. The goal of this innovation is to primarily boost productivity and enhance sustainability. Achieving these goals requires geometrical information about the fabricated objects, first to check for discrepancies between the as-built ...Conference Paper -
Quadruple Bessel beam trap for single droplet studies
(2015)Proceedings of SPIE ~ Optical Trapping and Optical Micromanipulation XIIConference Paper -