Fast movable remotely controlled Langmuir probe system

MA Pedrosa*, Angel Lopez Sanchez, C Hidalgo, A Montoro, Melissa Ann Gabriel, J Encabo, J de la Gama, L. M. Martinez, E. Sánchez, R. Perez, C Sierra

*Corresponding author for this work

Research output: Contribution to journalArticle

36 Citations (Scopus)


A versatile remotely controlled fast reciprocating Langmuir probe has been developed for the TJ-II stellarator. The main components of the system are a removable head, containing the measurement tips, and a displacement system that enables the probe to be displaced in vacuum. The probe displacement system has two different components: a slow one (course length less than or equal to 0.8 m) to set the probe at the initial measurement position, and a fast one (run length = 0.1 m) to obtain the desired measurements within an adjustable time interval during the plasma discharge. The radial movement of the probe is controlled remotely by means of a programmable logical control system, with a radial resolution of better than 1 mm. The fast displacement of the probe (up to 1.7 m/s) is achieved by using a pneumatic system. Its position as a function of time is monitored by means of the on-line response of a linear resistor attached to the fast displacement system. (C) 1999 American Institute of Physics. [S0034-6748(99)61101- 7].

Original languageEnglish
Pages (from-to)415-418
Number of pages4
JournalReview of Scientific Instruments
Issue number1
Publication statusPublished - Jan 1999
Externally publishedYes
Event12th Topical Conference on High-Temperature Plasma Diagnostics - PRINCETON
Duration: 7 Jun 199811 Jun 1998

Cite this

Pedrosa, MA., Lopez Sanchez, A., Hidalgo, C., Montoro, A., Gabriel, M. A., Encabo, J., ... Sierra, C. (1999). Fast movable remotely controlled Langmuir probe system. Review of Scientific Instruments, 70(1), 415-418.