Study on Charge Oscillation-Induced Low-Frequency Electric Field
Electric field induced by charge oscillation has been investigated by simulation of the electric field distribution using the finite-difference frequency-domain method. In addition, the electric field was induced by spatial oscillation of a sample to which a DC voltage was applied. The simulation and evaluation of the electric field verified that the efficiency for inducing the electric field has a proportional relationship with the amplitude displacement of a charged object, and detecting the electric field from the top to the side of the object is possible. Keywords—static electricity; charge oscillation; electric field; low frequency
KERR ELECTRO-OPTIC FIELD MAPPING MEASUREMENTS IN ELECTRON BEAM IRRADIATED POLYMETHYLMETHACRYLATE
Kerr electro-optic field mapping measurements have been performed inelectron beam irradiated polymethylmethacrylate (PMMA).The accumulatedtrapped charge results in large self-electric field.The resulting numerouslight maxima and minima were recorded on photographic film and videotapeto allow accurate measurement of the time dependence of the electric fieldand space charge distribution in charging sample for various electron beamenergies,beam current and sample thickness.It was found that volumebreakdown through the electron charged region may occur spontaneouslywhen accumulated charge levels are high.
The MR-TOF-MS isobar separator for the TITAN facility at TRIUMF
At TRIUMF’s Ion Trap for Atomic and Nuclear Science (TITAN) a multiple-reflection time-of-flight mass spectrometer (MR-TOF-MS) will extend TITAN’s capabilities and facilitate mass measurements and in-trap decay spectroscopy of exotic nuclei that so far have not been possible due to strong isobaric contamination. This MR-TOF-MS will also enable mass measurements of very short-lived nuclides (half-life > 1 ms) that are produced in very low quantities (a few detected ions overall). In order to allow the installation of an MR-TOF-MS in the restricted space on the platform, on which the TITAN facility is located, novel mass spectrometric methods have been developed. Transport, cooling and distribution of the ions inside the device is done using a buffer gas-filled RFQ-based ion beam switchyard. Mass selection is achieved using a dynamic retrapping technique after time-of-flight analysis in an electrostatic isochronous reflector system. Only due to the combination of these novel methods the realization of an MR-TOF-MS based isobar separator at TITAN has become possible. The device has been built, commissioned off-line and is currently under installation at TITAN.