# Sökning: "physics"

Visar resultat 1 - 5 av 4273 avhandlingar innehållade ordet physics.

1. ## 1. Nonlinear Beam Physics

Detta är en avhandling från Lund University , Department of physics

Sammanfattning : A condensed treatment of conventional beam physics (both linear and nonlinear) is given for the non-expert; this constitutes a minimum knowhow for constructing simulations of rudimentary beamlines. The criteria for an ideal nonlinear charged-particle simulation algorithm are then presented, leading to the derivation of a symplectic, explicit, Lorentz-covariant integrator. LÄS MER

2. ## 2. Searches for Particle Dark Matter Dark stars, dark galaxies, dark halos and global supersymmetric fits

Detta är en avhandling från Stockholm : Department of Physics, Stockholm University

Sammanfattning : The identity of dark matter is one of the key outstanding problems in both particle and astrophysics. In this thesis, I describe a number of complementary searches for particle dark matter. LÄS MER

3. ## 3. Aspects of Hadron Production in High-Energy Heavy-Ion Physics

Detta är en avhandling från Department of Physics, Lund University

Sammanfattning : High-energy heavy-ion collisions provide a unique tool for the study of nuclear matter as a function of temperature and density. WA98 at the CERN SPS recorded data with a 158 A GeV Pb beam on a Pb target in 1996. To cope with the high charged-particle density, a tracking system based on high granularity multi-step avalanche detectors was developed. LÄS MER

4. ## 4. Studies of Top Physics Sensitivity and of Pile-Up Effects on Energy Reconstruction in the ATLAS Detector : A Licentiate Thesis About the Treatment of Troublesome $\tau$ and Producing Pulses to Probe Pile-up Problems

Detta är en avhandling från Stockholm : Department of Physics, Stockholm University

Sammanfattning : This thesis presents two studies conducted using the ATLAS detectorat the Large Hadron Collider. The first one is a technical study abouthow out-of-time pile-up affects energy reconstruction using the optimalfiltering 2 algorithm in the TILE calorimeter sub detector. The studyis conducted using a pulse simulator software that is also described. LÄS MER

5. ## 5. Dosimetric effects of breathing motion in radiotherapy

Detta är en avhandling från Lund University, Faculty of Science, Department of Medical Radiation Physics

Sammanfattning : The goal of radiotherapy is to deliver a homogeneous high dose of radiation to a tumour while minimising the dose to the surrounding healthy tissue. To achieve this, increasingly advanced treatment techniques, such as volumetric modulated arc therapy (VMAT) and proton therapy, have been developed. LÄS MER