Essays about: "ion drift"

Showing result 21 - 25 of 26 essays containing the words ion drift.

1. 21. Evaluation of ALD Oxides as the Sensing Layer for Ion Sensors

   University essay from Uppsala universitet/Fasta tillståndets elektronik

   Author : Elis Nycander; [2016]
   Keywords : ;

   Abstract : In this thesis thin films of aluminium(III) oxide (Al2O3), titanium dioxide (TiO2), and tantalum(V) oxide (Ta2O5) were evaluated as the sensing layer for ion sensors. The oxide films were deposited using atomic layer deposition (ALD) and characterized with ellipsometry. READ MORE

3. 22. The Characteristics of B4C Coated Scintillators

   University essay from Lunds universitet/Kärnfysik; Lunds universitet/Fysiska institutionen

   Author : Anton Bodahl; [2016]
   Keywords : B4C; Scintillators; Coincidence Measurements; LIBAF; Homogenity Measurements; Physics and Astronomy;

   Abstract : The characteristics of Boron Carbide (B4C) coated polyvinyltoluene scintillators with a sputtered B4C coating ranging between 200 and 1000 nm have been studied using a photomultiplier - Lanthanum Bromide detector setup with a PuBe neutron source. The raw data from the detectors was analysed by imposing a detector coincidence condition. READ MORE

4. 23. Laser Stabilisation Using a Slow Light Cavity

   University essay from Lunds universitet/Fysiska institutionen

   Author : Teodor Strömberg; [2015]
   Keywords : Atomic Physics; Slow-Light; Rare-Earth Ion; Quantum Information; Linewidth; Laser Stabilisation; Spectral Hole Burning; Physics and Astronomy;

   Abstract : In this thesis the application of slow light effects to the area of laser stabilisation is investigated. The frequency stability of lasers locked to external cavities is limited by the stability of the modes in the reference cavity. READ MORE

5. 24. Modeling of Ion Injection in Oil-Pressboard Insulation Systems

   University essay from Fasta tillståndets elektronik

   Author : Christian Sonehag; [2012]
   Keywords : Ion drift diffusion model; Ion injection; Transformer insulation;

   Abstract : To make a High Voltage Direct Current (HVDC) transmission more energy efficient, the voltage of the system has to be increased. To allow for that the components of the system must be constructed to handle the increases AC and DC stresses that this leads to. One key component in such a transmission is the HVDC converter transformer. READ MORE

6. 25. Numerical modelling of Langmuir probe measurements for the Swarm spacecraft

   University essay from Rymd- och plasmafysik

   Author : Marco Chiaretta; [2011]
   Keywords : Langmuir probe; ionosphere; numerical simulation; Swarm satellites;

   Abstract : This work studies the current collected by the spherical Langmuir probes to be mounted on the ESA Swarm satellites in order to quantify deviations from idealized cases caused by non-ideal probe geometry. The finite-element particle-in-cell code SPIS is used to model the current collection of a realistic probe, including the support structures, for two ionospheric plasma conditions with and without drift velocity. READ MORE