| dc.contributor.author |
Zmerli, Besma |
|
| dc.contributor.author |
Bennesib, Nebil |
|
| dc.contributor.author |
Dimitrijević, S. Milan |
|
| dc.contributor.editor |
Popović, Luka Č. |
|
| dc.date.accessioned |
2011-01-10T10:15:37Z |
|
| dc.date.available |
2011-01-10T10:15:37Z |
|
| dc.date.issued |
2007 |
|
| dc.identifier.uri |
http://hdl.handle.net/123456789/1450 |
|
| dc.description.provenance |
Submitted by Slavisha Milisavljevic (slavisha) on 2011-01-10T10:15:37Z
No. of bitstreams: 1
I02.pdf: 326159 bytes, checksum: 023d582d0c52306fa4cd4937950a825b (MD5) |
en |
| dc.description.provenance |
Made available in DSpace on 2011-01-10T10:15:37Z (GMT). No. of bitstreams: 1
I02.pdf: 326159 bytes, checksum: 023d582d0c52306fa4cd4937950a825b (MD5)
Previous issue date: 2007 |
en |
| dc.language.iso |
sr |
en_US |
| dc.publisher |
Nenad Milovanović & Milan S. Dimitrijević, Astronomical Observatory, Belgrade |
en_US |
| dc.title |
Eksperimental and theoretical determination of temperature in plasmas |
en_US |
| mf.subject.keywords |
When plasma is in thermodynamic equilibrium, all species has the same temperature T. In
practice, plasmas are generally not in equilibrium, so different temperatures can be
obtained:
We define kinetic temperature for particles having a mass m and a velocity v distributed
around v by the Maxwell law. Using the Boltzmann law, giving repartition in the different
states of an atom, we obtain the excitation temperature Texc and using the Saha equation, we
derive the ionisation temperature. The electronic temperature Te is obtained by the classical
kinetic gas theory; using the ion mass instead of the electron mass we deduce the ionic
temperature Ti.
Radiation temperature Trad is obtained using the Planck law. In a complete thermodynamic
equilibrium CTE, we have equality of all these temperatures (Tcin = Texc = Tion = Te = Ti =
Trad). The electronic temperature Te can be obtained using spectral lines broadening. For
example, when the Doppler effect is predominant, the width of lines is proportional to the
square root of Te. Using the hydrogen lines, we can found tables and empirical laws giving
relations between widths and Te for an electronic density condition of plasma.
Some authors use noble gas lines for determining Te. The first common and useful
behaviour law of the width is an inverse proportional law to the root square of temperature;
this law was performed by a power one. But this can not be a general law, because in some
lines, the width increase with temperature and more consistent laws are developed relating
the temperature variation with the structure of the emitter. |
en_US |
| mf.contributor.editor-in-chief |
Dimitrijević, S. Milan |
|