Abstract: A gas transfer system for transferring gas into an analytical instrument for isotope ratio analysis comprises a capillary for delivering sample and/or reference gas from a gas source, a first connector for connecting the capillary to the gas source, a second connector for connecting the capillary to the analytical instrument, a crimping device, wherein the internal surface of the capillary comprises a coating material to prevent or minimize adsorption of water to the surface. Also provided is a device for regulating gas flow in a gas inlet system of an analytical instrument, comprising a body member having an internal gas flow channel, and a clamping member for attachment to the body member such that when the clamping member is tightened onto the body member, the internal gas flow channel is adjustably and reversibly crimped, to adjust gas flow therethrough.

Abstract: A gas transfer system for transferring gas into an analytical instrument for isotope ratio analysis comprises a capillary for delivering sample and/or reference gas from a gas source, a first connector for connecting the capillary to the gas source, a second connector for connecting the capillary to the analytical instrument, a crimping device, wherein the internal surface of the capillary comprises a coating material to prevent or minimize adsorption of water to the surface. Also provided is a device for regulating gas flow in a gas inlet system of an analytical instrument, comprising a body member having an internal gas flow channel, and a clamping member for attachment to the body member such that when the clamping member is tightened onto the body member, the internal gas flow channel is adjustably and reversibly crimped, to adjust gas flow therethrough.

Abstract: A gas transfer system for transferring gas into an analytical instrument for isotope ratio analysis comprises a capillary for delivering sample and/or reference gas from a gas source, a first connector for connecting the capillary to the gas source, a second connector for connecting the capillary to the analytical instrument, a crimping device, wherein the internal surface of the capillary comprises a coating material to prevent or minimize adsorption of water to the surface. Also provided is a device for regulating gas flow in a gas inlet system of an analytical instrument, comprising a body member having an internal gas flow channel, and a clamping member for attachment to the body member such that when the clamping member is tightened onto the body member, the internal gas flow channel is adjustably and reversibly crimped, to adjust gas flow therethrough.

Abstract: A gas transfer system for transferring gas into an analytical instrument for isotope ratio analysis comprises a capillary for delivering sample and/or reference gas from a gas source, a first connector for connecting the capillary to the gas source, a second connector for connecting the capillary to the analytical instrument, a crimping device, wherein the internal surface of the capillary comprises a coating material to prevent or minimize adsorption of water to the surface. Also provided is a device for regulating gas flow in a gas inlet system of an analytical instrument, comprising a body member having an internal gas flow channel, and a clamping member for attachment to the body member such that when the clamping member is tightened onto the body member, the internal gas flow channel is adjustably and reversibly crimped, to adjust gas flow therethrough.

Abstract: A method of configuring a Faraday detector in a mass spectrometer is described. The mass spectrometer defines a central ion beam axis, and the Faraday detector is moveable relative to the central ion beam axis. The Faraday detector includes a detector arrangement having a detector surface, and a Faraday slit defining an entrance for ions into the detector arrangement. The Faraday detector has an axis of elongation which extends through the Faraday slit. A width of the Faraday slit is chosen, and the angle between the axis of elongation of the Faraday detector and the central ion beam axis is adjusted such that ions striking the detector surface do not generate secondary electrons.

Abstract: A high voltage feedthrough assembly comprises an electrical lead extending in a longitudinal direction and an insulative cover capturing the electrical lead and extending along the electrical lead. The high voltage feedthrough assembly also comprises a flange, the insulative cover extending through and being held by the flange, so that the electrical lead extends through the flange. An adapter body has a cavity extending therethrough, is held in a spaced relation to the flange, the width of the cavity being greater than the width of the insulative cover, wherein a portion of the insulative cover and the electrical lead extending from the flange extends into the cavity. A collar is arranged in the adapter body cavity, extending radially between the adapter body and the insulative cover, to hold the insulative cover and electrical lead so that the insulative cover is radially spaced away from the cavity.

Abstract: The invention concerns a vacuum system, comprising a first vacuum chamber and a second vacuum chamber, the first vacuum chamber being evacuated by a first vacuum pump, in particular a turbomolecular pump, the first and the second vacuum chamber being connected by a passage, wherein the passage is surrounded by a sealing arrangement comprising an inner seal and an outer seal with a plenum positioned between the inner seal and the outer seal, the plenum being evacuated by a support vacuum pump, and wherein at least one sealing face of the inner seal consists of the wall material of the first or the second vacuum chamber, in particular the inner seal being formed by direct contact between the wall material of the first vacuum chamber and the wall material of the second vacuum chamber. Additionally, the invention concerns a mass spectrometry system.

Abstract: A method of configuring a Faraday detector in a mass spectrometer is described. The mass spectrometer defines a central ion beam axis I, and the Faraday detector is moveable relative to the central ion beam axis I. The Faraday detector includes a detector arrangement having a detector surface, and a Faraday slit defining an entrance for ions into the detector arrangement, the Faraday detector having an axis of elongation A which extends through the Faraday slit. A width of the Faraday slit is chosen and the angle ? between the axis of elongation, A, of the Faraday detector, and the central ion beam axis I is adjusted.

Abstract: The invention concerns a vacuum system, comprising a first vacuum chamber and a second vacuum chamber, the first vacuum chamber being evacuated by a first vacuum pump, in particular a turbomolecular pump, the first and the second vacuum chamber being connected by a passage, wherein the passage is surrounded by a sealing arrangement comprising an inner seal and an outer seal with a plenum positioned between the inner seal and the outer seal, the plenum being evacuated by a support vacuum pump, and wherein at least one sealing face of the inner seal consists of the wall material of the first or the second vacuum chamber, in particular the inner seal being formed by direct contact between the wall material of the first vacuum chamber and the wall material of the second vacuum chamber. Additionally, the invention concerns a mass spectrometry system.

Abstract: A high voltage feedthrough assembly comprises an electrical lead extending in a longitudinal direction and an insulative cover capturing the electrical lead and extending along the electrical lead. The high voltage feedthrough assembly also comprises a flange, the insulative cover extending through and being held by the flange, so that the electrical lead extends through the flange. An adapter body has a cavity extending therethrough, is held in a spaced relation to the flange, the width of the cavity being greater than the width of the insulative cover, wherein a portion of the insulative cover and the electrical lead extending from the flange extends into the cavity. A collar is arranged in the adapter body cavity, extending radially between the adapter body and the insulative cover, to hold the insulative cover and electrical lead so that the insulative cover is radially spaced away from the cavity.

Abstract: The invention provides a noise reducing enclosure for reducing the noise from a vacuum pump, e.g. a roughing pump of a high vacuum system, the vacuum pump having a long axis and the enclosure comprising a noise dampening material and being shaped to radially enclose the vacuum pump along its long axis and being axially open at each end. Airflow is permitted through the enclosure in use and optional integrated cooling means on the pump may assist cooling of the pump.

Abstract: The invention provides a noise reducing enclosure for reducing the noise from a vacuum pump, e.g. a roughing pump of a high vacuum system, the vacuum pump having a long axis and the enclosure comprising a noise dampening material and being shaped to radially enclose the vacuum pump along its long axis and being axially open at each end. Airflow is permitted through the enclosure in use and optional integrated cooling means on the pump may assist cooling of the pump.

Abstract: The invention relates to a device for collecting ions, in particular in an isotope mass spectrometer. At least one secondary electron multiplier (SEM) is provided, this being constructed in the manner of a card, namely box-like and with a thickness which is low in comparison with its length and width. The SEM is held in a frame. In addition, a flat flexible printed circuit board with a plurality of parallel conductors is connected to the SEM. The flexible printed circuit board permits the positioning of the SEM in order to match the ion paths to be sampled.

Abstract: The invention relates to a device for collecting ions, in particular in an isotope mass spectrometer. At least one secondary electron multiplier (SEM) is provided, this being constructed in the manner of a card, namely box-like and with a thickness which is low in comparison with its length and width. The SEM is held in a frame. In addition, a flat flexible printed circuit board with a plurality of parallel conductors is connected to the SEM. The flexible printed circuit board permits the positioning of the SEM in order to match the ion paths to be sampled.