Sökning: "avalanche"

Visar resultat 11 - 15 av 31 avhandlingar innehållade ordet avalanche.

1. 11. Kinetic modeling of runaway-electron dynamics in partially ionized plasmas

   Författare :Linnea Hesslow; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; runaway electrons; tokamaks; plasma physics; magnetic confinement fusion; electron-ion collisions; Fokker-Planck equation;

   Sammanfattning : An essential result of kinetic plasma physics is the runaway phenomenon, whereby a fraction of an electron population can be accelerated to relativistic energies. Such runaway electrons are formed in astrophysical settings, but are also of great practical relevance to fusion research. LÄS MER

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

   Författare :David Silvermyr; Partikel- och kärnfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; RHIC; pad readout; electronic; chip-on-board; tracking; heavy-ion collisions; freeze-out temperature; delta resonance; SPS; WA98; PHENIX; Fysik; coherent peripheral; multiplicity; Physics; Fysicumarkivet A:2001:Silvermyr;

   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. 13. Momentum-space dynamics of runaway electrons in plasmas

   Författare :Adam Stahl; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; synchrotron radiation; tokamak; critical electric field; non-linear collision operator; slide-away; runaway electrons; fusion-plasma physics;

   Sammanfattning : Fast electrons in a plasma experience a friction force that decreases with increasing particle speed, and may therefore be continuously accelerated by sufficiently strong electric fields. These so-called runaway electrons may quickly reach relativistic speeds. LÄS MER

5. 14. Design and characterization of MIS devices

   Författare :Kjell Jeppson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : This work is a part of the research performed at the Research Laboratory of Electronics (Elektronfysik III), concerning [metal-insulator-semiconductor] MIS field-effect devices. It deals with the properties of different memory devices, such as the [metal-nitride-oxide-semiconductor] MNOS and the [floating-gate avalanche-injection metal-oxide-semiconductor] FAMOS memory transistors, where the [metal insulator semiconductor] MIS structure is utilized for information storage. LÄS MER

7. 15. The role of striatal inhibition in the processing of cortical neuronal avalanches

   Författare :Andreas Klaus; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :;

   Sammanfattning : The brain is spontaneously active even in the absence of any obvious motor actions or sensory perceptions. This so-called resting activity or ongoing activity reflects the myriads of neuronal interactions necessary for the brain to process past actions, allow for current inputs, and prepare for future decisions and responses. LÄS MER