Negative Ion Production in High Electron Temperature Plasmas

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Electron temperature of ultracold plasmas.

We study the evolution of ultracold plasmas by measuring the electron temperature. Shortly after plasma formation, competition between heating and cooling mechanisms drives the electron temperature to a value within a narrow range regardless of the initial energy imparted to the electrons. In agreement with theory predictions, plasmas exhibit values of the Coulomb coupling parameter Gamma less ...

متن کامل

Measurements of Argon-ion Flow in Negative Ion Containing Plasmas

A laser-induced-fluorescence diagnostics was set up for the investigation of ion flows in negative ion containing plasmas. The contingent of negative ions in Ar plasmas is varied by admixing O2. Results on flow measurements in different plasma devices are reported. First measurements were carried out in the linear double-plasma device, in the sheath region in front of an electrically floating p...

متن کامل

Thermodynamics of High Temperature Plasmas

In this work we discuss how and to what extent the thermodynamic concepts and the thermodynamic formalism can be extended to the description of high temperature states of the plasma not necessarily associated with a Boltzmann distribution and with thermal equilibrium.The discussion is based on the “magnetic or electrostatic entropy concept”, an interpretative and predictive tool based on probab...

متن کامل

Twenty Five Years of Vibrational Kinetics and Negative Ion Production in H2 Plasmas: Modelling Aspects

Different approaches to study vibrational kinetics coupled to electron one for modeling different kinds of negative ion sources are presented. In particular two types of sources are investigated. The first one is a classical negative ion source in which the plasma is generated by thermoemitted electrons; in the second one, electrons already present in the mixture are accelerated by an RF field ...

متن کامل

Efficient negative ion production in rf plasmas using a mesh grid bias method.

Using a grid bias method for plasma parameter control, volume production of hydrogen negative ions H(-) is studied in pure hydrogen rf plasmas. Relationship between the extracted H(-) ion currents and plasma parameters is discussed. It is confirmed that both high and low electron temperature T(e) plasmas are produced in the separated regions when the grid is negatively biased. In addition, with...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Plasma and Fusion Research

سال: 2007

ISSN: 1880-6821

DOI: 10.1585/pfr.2.022