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 journalArticlepeer-review

41 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


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