DocumentCode :
1734602
Title :
An ultrafast probe for high-voltage pulsed measurements
Author :
Shah, R.R.D. ; Cliffe, R.J. ; Senior, P. ; Novac, B.M. ; Smith, I.R.
Author_Institution :
Loughborough Univ. of Technol., UK
fYear :
2001
Firstpage :
276
Abstract :
Summary form only given, as follows. This paper describes the latest advances that have been made in a programme to develop a high-voltage, high-bandwidth measurement probe, intended for use in the wide range of situations where the performance of more conventional probes is inadequate. A special purpose capacitive voltage divider made from ultra-high molecular weight polyethylene attenuates the high voltage, and feeds a Pockels cell that provides negligible loading on the output of the divider. Light from a laser diode is fed to the Cell through a long fibre optic cable, with the corresponding output signal being modulated by the voltage fed from the capacitive divider to the Pockels Cell. The emerging light is focussed into a further long fibre optic cable and on to a digital storage oscilloscope via a 1 GHz opto-electronic converter. The use of a finite-element package in the divider design ensures a compact and convenient shape, in which stray capacitance is minimised. Experimental results for 45 kV, 200 kV and 500 kV probes demonstrate that the rise time in response to an input pulse is less than 3 ns, 5 ns and 6 ns respectively, significantly better than that of a commercial high-quality electromagnetic probe.
Keywords :
finite element analysis; high-voltage techniques; optoelectronic devices; pulsed power supplies; voltage measurement; 1 GHz; 200 kV; 45 kV; 500 kV; Pockels cell; capacitive voltage divider; digital storage oscilloscope; fibre optic cable; finite-element package; high-quality electromagnetic probe; high-voltage high-bandwidth measurement probe; high-voltage pulsed measurements; opto-electronic converter; ultra-high molecular weight polyethylene; ultrafast probe; Diode lasers; Feeds; Fiber optics; Optical fiber cables; Optical modulation; Oscilloscopes; Polyethylene; Probes; Pulse measurements; Voltage;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Pulsed Power Plasma Science, 2001. IEEE Conference Record - Abstracts
Conference_Location :
Las Vegas, NV, USA
Print_ISBN :
0-7803-7141-0
Type :
conf
DOI :
10.1109/PPPS.2001.960920
Filename :
960920
Link To Document :
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