DocumentCode :
1143375
Title :
The TMX heavy ion beam probe
Author :
Hallock, Gary A. ; Hickok, Robert L. ; Hornady, Robert S.
Author_Institution :
Dept. of Electr. & Comput. Eng., Texas Univ., Austin, TX, USA
Volume :
22
Issue :
4
fYear :
1994
fDate :
8/1/1994 12:00:00 AM
Firstpage :
341
Lastpage :
349
Abstract :
A heavy ion beam probe has been used to measure the radial space potential distribution in the central cell of TMX. This was the first beam probe system to utilize computer control, CAMAC instrumentation, and fast time response for broadband fluctuation capabilities. The fast time response was obtained using off-line processing of the energy analyzer detector signals and wideband transimpedance amplifiers. The on-axis space potential was found to be 300-400 V, with φe/Tec~8. The radial potential profile is parabolic when gas box fueling is used. The frequency of observed fluctuations was found to agree with the E×B plasma rotation frequency during the discharge. The measured Tl++ secondary ion current level is consistent with calculations, given reasonable assumptions for beam attenuation
Keywords :
CAMAC; fluctuations; plasma density; plasma diagnostics; plasma flow; plasma probes; CAMAC instrumentation; E×B plasma rotation frequency; TMX heavy ion beam probe; Tl++ secondary ion current level; beam attenuation; beam probe system; broadband fluctuation capabilities; central cell; computer control; energy analyzer detector signals; fast time response; frequency fluctuation; gas box fueling; off-line processing; on-axis space potential; parabolic radial potential profile; radial space potential distribution; wideband transimpedance amplifiers; CAMAC; Control systems; Fluctuations; Frequency; Instruments; Ion beams; Plasma measurements; Probes; Signal analysis; Time factors;
fLanguage :
English
Journal_Title :
Plasma Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0093-3813
Type :
jour
DOI :
10.1109/27.310639
Filename :
310639
Link To Document :
بازگشت