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RF probe recovery time reduction with a novel active ringing suppression circuit by A.S. Peshkovsky; J. Forguez; L. Cerioni; D.J. Pusiol is a Chemistry article available to read on EtoBox.

What is RF probe recovery time reduction with a novel active ringing suppression circuit about?

A simple Q-damper device for active probe recovery time reduction is introduced along with a straightforward technique for the circuitÕs component value optimization. The device is inductively coupled to a probe through a coupling transformer positioned away from the main coil, which makes the design independent of the coil type being used. The Q-damper is a tuned circuit, which is resonant at the same frequency as the probe and can be actively interrupted. When the circuit is interrupted, it is detuned and, thereby, is uncoupled from the probe, which operates normally. Turning the device on leads to re-coupling of the circuits and causes splitting of the probeÕs resonance line, which can be observed through its drive port. A resistance of an appropriate value is introduced into the Q-damper circuit, resulting in smoothing of the resonance splitting into one broad line, representing the coupled sys-temÕs low-Q state, in which the energy stored in the main coil is efficiently dissipated. The circuitÕs component values are optimized by monitoring the shape of this low-Q state. Probe recovery time reduction by, approximately, an order of magnitude has been obtained with this device. A

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Author

A.S. Peshkovsky; J. Forguez; L. Cerioni; D.J. Pusiol

Publisher

Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV (ISSN 1090-7807)

Published

2005

Language

EN

Field

Chemistry (Physical Sciences)