Plasma physics laboratory 1

A.Y. 2016/2017
Overall hours
Learning objectives
Acquisizione di competenze in metodi sperimentali applicati nello studio di plasmi (in particolare plasmi non neutri) e fasci di particelle cariche.
Expected learning outcomes
Course syllabus and organization

Single session

Lesson period
First semester
Course syllabus
Elements of nonneutral plasma physics. Diocotron modes; derivation of the eigenvalue equation. Resistive instability of the diocotron modes, calculation of growth rates. Autoresonance. Temperature and diffusion of the trapped plasma.

Harmonic analysis: Fourier series, continuous and discrete Fourier transform; sampling theorem, aliasing.

Description of the experimental apparatus (Penning-Malmberg trap), diagnostics and instrumentation available in the laboratory.

Introduction to data analysis: Procedures, methods, creation of programs for the analysis and visualization of experimental results.

EXPERIMENTS (some of the experiments listed in the following are performed):

Electrostatic and optical measurements of charge and density, CCD image calibration.

Frequency and amplitude measurement of the first diocotron mode (l=1) in an electron column.

Measurement of the growth rate of the resistive instability of the l=1 mode.

Excitation of the l=1 mode and characterization of the autoresonance phenomenon.

Measurement of the total confined charge as a function of time and calculation of the radial diffusion coefficient.

Measurement of the parallel (axial) temperature in an electron plasma.
FIS/03 - PHYSICS OF MATTER - University credits: 6
Laboratories: 54 hours
Lessons: 12 hours