Implant Sciences Corporation

Horiba Stec, Co., Ltd.

L3 Technologies, Inc.

Said Boumsellek

Dmitriy Ivashin

Junji Aoki

Andrew Anderson

Troy A Velazquez

Anatoly Lazerevich

Hirokazu Kitaura

A gas sensor includes a first chamber containing a plurality of evenly spaced rods having voltages applied thereto to cause gas ions in the first chamber to move in a direction from a first end of the first chamber to a second end of the first chamber and a second chamber coupled to the second end of the first chamber and having at least one ion detector, where ions pass from the first chamber to the second chamber through a plurality of channels between the first chamber and the second chamber and are detected by the at least one ion detector. The voltages applied to the rods may include a first voltage applied to a first subset of the rods and a second voltage applied to a second subset of the rods, each of first and second voltages containing a DC component and an AC component.

Miniature quadrupole arrays using electron multiplication detectors

An ion mobility spectrometer includes a drift tube, a plurality of sensors arranged at one end of the drift tube that provide signals corresponding to ions impinging on the sensors, and a multi-channel data acquisition system, coupled to each of the sensors, that compensates for delays experienced by ions that are farther from a main axis of drift tube prior to combining the signals from the sensors. The sensors may be electrically biased so that a particular one of the sensors that attracts ions is adjacent to one or more of the sensors that do not attract ions. Signals from adjacent sensors may be subtracted to reduce signal values corresponding to mirror current. The plurality of sensors may be arranged as a honeycomb or as a plurality of concentric circles.

Multi-channel ion mobility spectrometer

Devices and techniques for ion analysis, including ion mobility separation and mass spectrometry, are provided using a dual polarity spark ion source and having the flexibility required to optimize the detection performance for a broad range of illicit substances with different physical and chemical properties. In various embodiments, the volatility and electro-chemical aspects may be addressed by the system described herein by performing real-time detection of compounds detectable in both positive and negative polarities and/or prioritizing spectra acquisition in a given polarity due to the high volatility and therefore short residence of certain target compounds.

Dual polarity spark ion source

For ion mobility spectrometry applications, a desired shape of a sensor structure may be created by forming a desired shape from a ceramic material, such as aluminum nitride. In various embodiments, the sensor structure may be formed using discrete individual ceramic sheets and/or from a preformed ceramic tube. Via holes are formed into the sensor structure to provide for efficient circuitry configurations of the IMS drift tube and/or providing electrical connections between the interior and exterior of the drift tube.

Miniature sensor structures for ion mobility spectrometers

Selective ionization at atmospheric or near atmospheric pressure of a sample diluted in air is provided in multiple steps. Initially, components of air and/or other gas are ionized to generate reactive ions. The reactive ions are then filtered using a high frequency filter to yield selected reactive ions. Thereafter, the selected reactive ions are reacted with sample molecules of a sample being analyzed in a charge transfer process. Depending on the properties of the sample molecules, the filter may select some reactive ions to enter the sample zone and block others entirely thus controlling ion chemistry and charge transfer yields in the sample zone. The described system is directed to controlling ions at the ion source level, using a high frequency filter technique, in connection with subsequent analysis. The method generates the ions of choice for subsequent analysis in such platforms as ion mobility and differential mobility spectrometers.

Selective ionization using high frequency filtering of reactive ions

A gas analyzer using a quadrupole mass spectrometric method etc. is provided with an ionizer to ionize a sample gas, a first ion detector and a second ion detector each configured to detect a respective ion from ionizer, and each being disposed a respective distance from the ionizer on an opposite side of the ionizer, the respective distances being different from each other, a filter interposed between the ionizer and the first ion detector to selectively allow ions from the ionizer to pass therethrough, and an arithmetic device to correct a partial pressure of a specific component obtained from the first ion detector and selected by the filter by using a first total pressure of the sample gas obtained from the first ion detector and a second total pressure of the sample gas obtained from the second ion detector.

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San Diego, CA, United States of America

Said Boumsellek