Sökning: "RWM"

Visar resultat 1 - 5 av 10 avhandlingar innehållade ordet RWM.

1. 1. Resistive Wall Mode Stability and Control in the Reversed Field Pinch

   Författare :Dmitriy Yadikin; Per Brunsell; Mikhail Gryaznevich; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Resistive wall modes; RWM; active control; feedback; MHD modes; Reversed-Field pinch; RFP; intelligent shell; mode control; Electrophysics; Elektrofysik;

   Sammanfattning : Control of MHD instabilities using a conducting wall together with external magnetic fields is an important route to improved performance and reliability in fusion devices. Active control of MHD modes is of interest for both the Advanced Tokamak and the Reversed Field Pinch (RFP) configurations. LÄS MER

3. 2. Model based approach to resistive wall magnetohydrodynamic instability control : Experimental modeling and optimal control for the reversed-field pinch

   Författare :Agung Chris Setiadi; Per Brunsell; Lorenzo Frassinetti; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; magnetohydrodynamic; model based control; reversed-field pinch; Electrical Engineering; Elektro- och systemteknik;

   Sammanfattning : The primary objective of fusion research is to realize a thermonuclear fusion power plant. The main method to confine the hot plasma is by using a magnetic field. The reversed-field pinch is a type of magnetic confinement device which suffers from variety of magnetohy- drodynamic (MHD) instabilities. LÄS MER

4. 3. Round window membrane and delivery of biologically active agents into the cochlea

   Författare :Amanj Saber; Mats Ulfendahl; Lars Lundman; Karolinska Institutet; Karolinska Institutet; Sweden Stockholm Karolinska Institutet Department of Clinical Neoruscience; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Round window membrane; sodium hyaluronate; chitosan; local cochlear drug delivery and gene delivery; Oto-rhino-laryngologi; Oto-Rhino-Laryngology; Biology; Biologi; Round window membrane; sodium hyaluronate; chitosan; local cochlear drug delivery and gene delivery;

   Sammanfattning : Establishing efficient methods for local administration of drugs to the inner ear has great clinical relevance for the management of inner ear disorders. However, the administration route remains a critical issue. LÄS MER

5. 4. Stabilisation of resistive-wall modes in fusion plasmas

   Författare :Demetrio Gregoratto; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; electromagnetic feedback control; Tokamak; resistive-wall mode; reversed field pinch; MHD;

   Sammanfattning : For the success of thermonuclear fusion by magnetic confinement it is important to improve on the stability limits imposed by large-scale magnetohydrodynamics (MHD) instabilities. This thesis focuses on the stabilisation of the "resistive-wall mode" (RWM), an instability which affects high-pressure tokamaks but also Reversed Field Pinches (RFP). LÄS MER

7. 5. Model predictive control of resistive wall modes in the reversed-field pinch

   Författare :Agung Chris Setiadi; Per Brunsell; Lorenzo Frassinetti; Cristian Rojas; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : The reversed-field pinch (RFP) is a magnetic confinement fusion (MCF) device. It exhibits a variety of unstable modes that can be explained by magnetohydrodynamic (MHD) theory. A particular unstable mode that is treated in this work is the resistive wall mode (RWM), which occurs when the shell of the device has finite conductivity. LÄS MER