نتایج جستجو برای: dt neutron generator
تعداد نتایج: 103915 فیلتر نتایج به سال:
Time-dependent integrated predictive modelling is carried out using the PTRANSP code to predict fusion power and parameters such as alpha particle density and pressure in ITER H-mode plasmas. Auxiliary heating by negative ion neutral beam injection and ion-cyclotron heating of He 3 minority ions are modelled, and the GLF23 transport model is used in the prediction of the evolution of plasma tem...
Radio-frequency (RF) driven ion sources are being developed in Lawrence Berkeley National Laboratory (LBNL) for sealed-accelerator-tube neutron generator application. By using a 5-cm-diameter RF-driven multicusp source H yields over 95% have been achieved. These experimental findings will enable one to develop compact neutron generators based on the D-D or D-T fusion reactions. In this new neut...
In this paper, we propose a method for automated di/dt stressmark generation to test maximum voltage droop in a microprocessor power distribution network. The di/dt stressmark is an instruction sequence which draws periodic high and low current pulses that maximize voltage fluctuations including voltage droops. In order to automate di/dt stressmark generation, we devise a code generator with th...
74 LLE Review, Volume 86 Imaging the neutrons produced by implosions at the National Ignition Facility1 or the Laser Mega Joule2 will require spatial resolution as good as 5 μm (Ref. 3) to identify failure mechanisms such as poor implosion symmetry or improper laser pulse shaping. An important step to achieving this goal is reported in this article. Neutron images were obtained from OMEGA implo...
Multi-step nuclear reactions in the core of an OMEGA implosion can be used to infer the density of the deuterium-tritium (DT) fuel at peak compression, an important measure of the implosion performance. A three-step process leads to the production of tertiary neutrons with energies up to 30 million electron volts (MeV), more than twice the energy of the primary neutrons (14.1 MeV) from the dire...
DT neutron yield (Y(n)), ion temperature (T(i)), and down-scatter ratio (dsr) determined from measured neutron spectra are essential metrics for diagnosing the performance of inertial confinement fusion (ICF) implosions at the National Ignition Facility (NIF). A suite of neutron-time-of-flight (nTOF) spectrometers and a magnetic recoil spectrometer (MRS) have been implemented in different locat...
A compact neutron spectrometer, based on a CH foil for the production of recoil protons and CR-39 detection, is being developed for the measurements of the DD-neutron spectrum at the NIF, OMEGA, and Z facilities. As a CR-39 detector will be used in the spectrometer, the principal sources of background are neutron-induced tracks and intrinsic tracks (defects in the CR-39). To reject the backgrou...
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