Abstract:
A method of and system for analyzing ion mobility of a sample. The sample is received by an ionization chamber, which ionizes molecules of the sample. The ionized sample is received from the ionization chamber by a drift tube coupled to the ionization chamber and propelled along a length of the drift tube in a first direction away from the ionization chamber by an electric field gradient of the drift tube. A magnitude of the electric field gradient is in view of an atmospheric pressure measurement. A drift gas is propelled through the drift tube in a second direction opposite the first direction such that different types of ionized molecules travel through the drift tube at different rates. An arrival time of each of the different types of molecules at a detector located at a second end of the drift tube opposite the first end is detected.
Abstract:
A beam scheduler adds the maximum allowable waiting time until a beam is allocated to an irradiation chamber corresponding to an irradiation request when the irradiation request is received from one irradiation chamber of a plurality of irradiation chambers A to D; adds the irradiation request to the end of the order of a waiting list; determines whether or not the predicted waiting time until the beam is allocated to the one irradiation chamber exceeds the maximum allowable waiting time; and advances the order of the irradiation request on the waiting list, thereby allocating the beam to the irradiation chamber corresponding to the top irradiation request in the order of the waiting list, if it is determined that the predicted waiting time exceeds the maximum allowable waiting time.
Abstract:
The present invent provides a particle detector for counting and measuring the flight time of secondary electrons and scattered ions and neutrals and to correlate coincidences between these and backscattered ions/and neutrals while maintaining a continuous unpulsed microfocused primary ion beam for impinging a surface. Intensities of the primary particle scattering and secondary particle emissions are correlated with the position of impact of the focused beam onto a materials surface so that a spatially resolved surface elemental and electronic structural mapping is obtained by scanning the focused beam across the surface.
Abstract:
A proposed approach to determining both the Energy of an electron in an atom, and time of its existence is presented. The approach utilizes information about the physical system involved to overcome the limitation of the uncertainty principle.
Abstract:
A high voltage diamond based switching device capable of sustaining high currents in the on state with a relatively low impedance and a relatively low optical switching flux, and capable of being switched off in the presence of the high voltage being switched. The device includes a diamond body having a Schottky barrier contact, held in reverse bias by the applied voltage to be switched, to an essentially intrinsic diamond layer or portion in the diamond body, a second metal contact, and an optical source or other illuminating or irradiating device such that when the depletion region formed by the Schottky contact to the intrinsic diamond layer is exposed to its radiation charge carriers are generated. Cain in the total number of charge carriers then occurs as a result of these charge carriers accelerating under the field within the intrinsic diamond layer and generating further carriers by assisted avalanche breakdown.
Abstract:
A radiation counting detector includes a first substrate and a second substrate that is generally parallel to the first substrate and forms a gap with the first substrate. A gas is contained within the gap. A photocathode layer is coupled to one side of the first substrate and faces the second substrate. A first electrode is coupled to the second substrate and a second electrode is electrically coupled to the first electrode. A first impedance is coupled to the first electrode and a second impedance is coupled to the second electrode. A power supply is coupled to at least one of the electrodes. The radiation counting detector further includes a plurality of pixels, each capable of outputting a gas discharge pulse upon interaction with radiation received from the photocathode. Each gas discharge pulse is counted as having an approximately equal value. The radiation counting detector further includes circuitry for detecting if a gas discharge pulse is output from the pixels, and for counting each gas discharge pulse as an individual event.
Abstract:
A detector device for radiation therapy comprising an array of detector cells is provided. Each detector cell comprises an electronic circuit connected to a sensor cell that generates a charge signal in response to an incident radiation hit. The electronic circuit comprises at least two discriminators and at least two analogue counters, and is adapted to substantially simultaneously perform two different measurements on the signal in order to simultaneously provide imaging and dosimetry.
Abstract:
Systems, methods, and other modalities are described for (a) obtaining an indication relating to an emission module (which may be dangerous, e.g.) or its user (who may be untrained, e.g.) and for (b) configuring the module or causing an irradiation (for imaging, e.g.) in response to the indication.
Abstract:
Described are a method and apparatus for evaluating a least one characteristic of a plasma. The described method uses photons to raise the excitation state to or past the point of ionization of atoms which will traverse the plasma to be evaluated. The ionization of the atoms, followed by the measurement of the energy of any resulting secondary ions, facilitates the determining of one or more characteristics of the plasma. In one example, the photons are provided by a laser which directs a beam to intersect, and in some examples to be collinear with, a beam of atoms directed through the plasma.