AN ONLINE LANGMUIR PROBE TECHNIQUE FOR THE STUDY OF AFTERGLOW PLASMAS

被引:46
作者
SPANEL, P [1 ]
机构
[1] UNIV INNSBRUCK, INST IONENPHYS, A-6020 INNSBRUCK, AUSTRIA
基金
奥地利科学基金会;
关键词
AFTERGLOW PLASMAS; LANGMUIR PROBE;
D O I
10.1016/0168-1176(95)04264-L
中图分类号
O64 [物理化学(理论化学)、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号
070203 ; 070304 ; 081704 ; 1406 ;
摘要
A new analytical technique has been developed to determine from Langmuir probe characteristics the electron number densities, electron energy distribution functions and electron temperatures in thermal and near-thermal afterglow plasmas. This technique utilises a standard personal computer equipped with a simple 12-bit analogue/digital and digital/analogue converters coupled to the Langmuire probe via a specially designed differential amplifier. The energy distribution functions are obtained by numerical differentiation of the probe characteristics using a fast noise-suppressing numerical technique, the mathematical principles of which are discussed in some detail. Some sample data, which have been obtained in truly thermalised helium flowing afterglows and in argon flowing afterglow at elevated electron temperatures, are presented to demonstrate the value of this new analytical technique.
引用
收藏
页码:299 / 310
页数:12
相关论文
共 30 条
[1]   MEASUREMENTS OF THE DISSOCIATIVE RECOMBINATION COEFFICIENTS OF O+2, NO+ AND NH+4 IN THE TEMPERATURE-RANGE 200-600 K [J].
ALGE, E ;
ADAMS, NG ;
SMITH, D .
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1983, 16 (08) :1433-1444
[2]   RELATIONSHIP FOR PLASMA SHEATHS ABOUT LANGMUIR PROBES [J].
BETTINGER, RT ;
WALKER, EH .
PHYSICS OF FLUIDS, 1965, 8 (04) :748-+
[3]  
GLOSIK J, 1983, CZECH J PHYS B, V33, P1233
[4]   A COMPARISON OF METHODS OF DETERMINING ELECTRON DENSITIES IN AFTERGLOW PLASMAS FROM LANGMUIR PROBE CHARACTERISTICS [J].
GOODALL, CV ;
SMITH, D .
PLASMA PHYSICS, 1968, 10 (03) :249-+
[5]  
Langmuir I., 1924, GEN ELECTR REV, V27, P616
[6]  
Langmuir I., 1924, GEN ELECTR REV, V27, P449, DOI DOI 10.1103/PHYSREV.28.727
[7]  
REES MH, 1989, PHYSICS CHEM UPPER A
[8]   ELECTRON-ATTACHMENT TO C60 AT LOW ENERGIES [J].
SMITH, D ;
SPANEL, P ;
MARK, TD .
CHEMICAL PHYSICS LETTERS, 1993, 213 (1-2) :202-206
[9]   DIFFUSION COOLING IN NEON, ARGON, AND KRYPTON AFTERGLOW PLASMAS [J].
SMITH, D ;
ADAMS, NG ;
DEAN, AG .
ZEITSCHRIFT FUR PHYSIK, 1972, 253 (03) :191-&
[10]   DISSOCIATIVE RECOMBINATION OF H-3(+) AND SOME OTHER INTERSTELLAR IONS - A CONTROVERSY RESOLVED [J].
SMITH, D ;
SPANEL, P .
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY AND ION PROCESSES, 1993, 129 :163-182