Abstract:
A microchannel plate for detecting neutrons includes a hydrogen-rich polymer substrate that defines a plurality of channels extending from a top surface of the substrate to a bottom surface of the substrate, where neutrons interact with the plurality of channels to generate at least one secondary electron. A top electrode is positioned on the top surface of the substrate and a bottom electrode is positioned on the bottom surface of the substrate. A resistive layer is formed over an outer surface of the plurality of channels that provides ohmic conduction with a resistivity that is substantially constant. An emissive layer is formed over the resistive layer. Neutron interaction products interact with the plurality of channels defined by the substrate and the emissive films to generate secondary electrons that cascade within the plurality of channels to provide an amplified signal related to the detection of neutrons.
Abstract:
Techniques for plasma injection for space charge neutralization of an ion beam are disclosed. In one particular exemplary embodiment, the techniques may be realized as a plasma injection system for space charge neutralization of an ion beam. The plasma injection system may comprise a first array of magnets and a second array of magnets positioned along at least a portion of an ion beam path, the first array being on a first side of the ion beam path and the second array being on a second side of the ion beam path, the first side opposing the second side. At least two adjacent magnets in the first array of magnets may have opposite polarity. The plasma injection system may also comprise a plasma source configured to generate a plasma in a region associated with a portion of the ion beam path by colliding at least some electrons with a gas.
Abstract:
An ion buncher stage for a linear accelerator system is disclosed for bunching ions in an ion implantation system. The ion buncher stage may be employed upstream of one or more accelerating stages such that the loss of ions in the linear accelerator system is reduced. The invention further includes an asymmetrical double gap buncher stage, as well as a slit buncher stage for further improvement of ion implantation efficiency. Also disclosed are methods for accelerating ions in an ion implanter linear accelerator.
Abstract:
A microchannel plate for detecting neutrons includes a hydrogen-rich polymer substrate that defines a plurality of channels extending from a top surface of the substrate to a bottom surface of the substrate, where neutrons interact with the plurality of channels to generate at least one secondary electron. A top electrode is positioned on the top surface of the substrate and a bottom electrode is positioned on the bottom surface of the substrate. A resistive layer is formed over an outer surface of the plurality of channels that provides ohmic conduction with a resistivity that is substantially constant. An emissive layer is formed over the resistive layer. Neutron interaction products interact with the plurality of channels defined by the substrate and the emissive films to generate secondary electrons that cascade within the plurality of channels to provide an amplified signal related to the detection of neutrons.
Abstract:
The present invention is directed to a scanning apparatus and method for processing a workpiece, wherein the scanning apparatus comprises a wafer arm and moving arm fixedly coupled to one another, wherein the wafer arm and moving arm are operable to rotate about a first axis. An end effector, whereon the workpiece resides, is coupled to the wafer arm. A rotational shaft couples the wafer arm and moving arm to a first actuator, wherein the first actuator provides a rotational force to the shaft. A momentum balance mechanism is coupled to the shaft and is operable to generally reverse the rotational direction of the shaft. The momentum balance mechanism comprises one or more fixed spring elements operable to provide a force to a moving spring element coupled to the moving arm. A controller is further operable to maintain a generally constant translational velocity of the end effector within a predetermined scanning range.
Abstract:
The present invention is directed to a scanning apparatus and method for processing a workpiece, wherein the scanning apparatus comprises a wafer arm and moving arm fixedly coupled to one another, wherein the wafer arm and moving arm are operable to rotate about a first axis. An end effector, whereon the workpiece resides, is coupled to the wafer arm. A rotational shaft couples the wafer arm and moving arm to a first actuator, wherein the first actuator provides a rotational force to the shaft. A momentum balance mechanism is coupled to the shaft and is operable to generally reverse the rotational direction of the shaft. The momentum balance mechanism comprises one or more fixed spring elements operable to provide a force to a moving spring element coupled to the moving arm. A controller is further operable to maintain a generally constant translational velocity of the end effector within a predetermined scanning range.
Abstract:
A mass analysis magnet assembly (16) is provided for use in an ion implanter (10), comprising: (i) a magnet (44) for mass analyzing an ion beam (15) output by an ion source (14), the magnet providing an interior region (49) through which the ion beam passes; and (ii) at least one strike plate (48) in part forming an outer boundary of the interior region (49). The at least one strike plate is comprised of an isotopically pure carbon-based material. The isotopically pure carbon-based material, preferably by mass greater than 99% carbon C-12, prevents neutron radiation when impacted by deuterons extracted from the ion source (14). The strike plate (48) may comprise an upper layer (56) of isotopically pure carbon C-12 isotope positioned atop a lower substrate (54).
Abstract:
A microchannel plate for detecting neutrons includes a hydrogen-rich polymer substrate that defines a plurality of channels extending from a top surface of the substrate to a bottom surface of the substrate, where neutrons interact with the plurality of channels to generate at least one secondary electron. A top electrode is positioned on the top surface of the substrate and a bottom electrode is positioned on the bottom surface of the substrate. A resistive layer is formed over an outer surface of the plurality of channels that provides ohmic conduction with a resistivity that is substantially constant. An emissive layer is formed over the resistive layer. Neutron interaction products interact with the plurality of channels defined by the substrate and the emissive films to generate secondary electrons that cascade within the plurality of channels to provide an amplified signal related to the detection of neutrons.
Abstract:
An architecture for a ribbon ion beam ion implanter system is disclosed. In one embodiment, the architecture includes an acceleration/deceleration parallelizing lens system for receiving a fanned ribbon ion beam and for at least parallelizing (and perhaps also accelerate or decelerate) the fanned ribbon ion beam into a substantially parallel ribbon ion beam, and an energy filter system downstream from the acceleration/deceleration parallelizing lens system and prior to a work piece to be implanted by the substantially parallel ribbon ion beam. The acceleration/deceleration parallelizing lens system includes lenses for at least parallelizing (and perhaps also accelerate or decelerate) the fanned ribbon ion beam and acceleration/deceleration lenses for accelerating or decelerating the substantially parallel ribbon ion beam. The parallelizing lens allows delivery of a high current ribbon ion beam to the work piece with energy that can extend down to as low as approximately 200 eV. The energy filter system provides a substantially parallel ribbon ion beam that is substantially free of energy contamination.
Abstract:
An ion buncher stage for a linear accelerator system is disclosed for bunching ions in an ion implantation system. The ion buncher stage may be employed upstream of one or more accelerating stages such that the loss of ions in the linear accelerator system is reduced. The invention further includes an asymmetrical double gap buncher stage, as well as a slit buncher stage for further improvement of ion implantation efficiency. Also disclosed are methods for accelerating ions in an ion implanter linear accelerator.