Other

The Johns Hopkins University

Scott C Ecelberger

Douglas L Lewis

Ashok Kumar

Eilaz Babaev

Robert J Wojciechowski

Jian Ruan

Keith A Soldavin

Manish Kochar

The present invention is directed to a bipolar ion detector capable of detecting both positive and negative ions in a single configuration. The invention uses either a single microchannel plates or a stack of microchannel plates to convert the ion signal into an amplified electron signal. Circuitry allows the anode to be biased (floated) to a positive high voltage and efficiently couple the signal from the anode out to recording electronics at ground.

Bipolar ion detector

A sonic transducer includes a transducer body and a drive element coupled to the transducer body to produce a sonic output in response to an applied electrical input. A sense element is coupled to the sonic drive element and is configured to provide an electrical feedback output related to the sonic output. The electrical feedback output is adapted to be used to control the applied electrical input to the sonic drive element so as to control the energy delivered to the working area or tip of the transducer.

Sonic transducer and feedback control method thereof

Growing community of inventors

Laurel, MD, United States of America

Scott C Ecelberger