نتایج جستجو برای: electrostatic accelerator
تعداد نتایج: 41588 فیلتر نتایج به سال:
many of the video processing algorithms cannot be implemented in real time on general computers, due to their computational complexity. for an efficient implementation, a custom hardware that can be reconfigured for the algorithm, is used. in this paper a new acceleration hardware based on fpga elements is proposed. this hardware can be adapted with the processing algorithm through fpga design ...
2014 The North-American MP Tandem accelerators are six in number. Serial § 1. Yale; § 2. Minnesota; § 3. Chalk river; § 4. Rochester; and § 6 and § 7. Brookhaven. The current status and operating characteristics of these six tandem accelerators will be discussed in the order of their serial numbers. Upgrade and special improvements of the different machines will be reviewed and new developments...
In this paper, we present a three-dimensional Poisson equation solver for the electrostatic potential of a charged beam with large longitudinal to transverse aspect ratio in a straight and a bent conducting pipe with open-end boundary conditions. In this solver, we have used a Hermite–Gaussian series to represent the longitudinal spatial dependence of the charge density and the electric potenti...
The Front-End Systems (FES) of the Spallation Neutron Source (SNS) project are being built by Berkeley Lab and will deliver a pulsed 40-mA H ion beam at 2.5 MeV energy to the subsequent Drift-Tube Linac. The FES accelerator components comprise an rf driven, volume-production, cesium-enhanced, multi-cusp Ion Source; an electrostatic Low-Energy Beam Transport (LEBT) that includes provisions for t...
Advanced neutron interrogation systems for screening sea-land cargo containers for shielded special nuclear materials (SNM) require a high-yield neutron source to achieve the desired detection probability, false alarm rate, and throughput. The design of an accelerator-driven neutron source is described that utilizes the D(d,n)He reaction to produce a forward directed beam of up to 8.5 MeV neutr...
The MIT Linear Electrostatic Ion Accelerator (LEIA) generates DD and D(3)He fusion products for the development of nuclear diagnostics for Omega, Z, and the National Ignition Facility (NIF). Significant improvements to the system in recent years are presented. Fusion reaction rates, as high as 10(7) s(-1) and 10(6) s(-1) for DD and D(3)He, respectively, are now well regulated with a new ion sou...
In this paper, we present a parallel three-dimensional Poisson solver for the electrostatic potential of a charged beam in a round or rectangular conducting pipe with open-end boundary conditions. This solver uses an eigenfunction expansion in the transverse direction and a finite difference method in the longitudinal direction. The computational domain in the longitudinal direction contains on...
A new apparatus designed to accelerate/decelerate and study the surface impact phenomena of charged aerosols and nanoparticles over a wide range of mass-tocharge (m/z) ratios and final velocities is described. A nanoparticle ion source coupled with a linear electrostatic trap configured as an image charge detection (ICD) mass spectrometer allows determination of the mass-to-charge ratio and the...
Relativistic positron beams are required for fundamental research in nonlinear strong field QED, plasma physics, and laboratory astrophysics. Positrons difficult to create manipulate due their short lifetime, energy gain is limited by the accelerator size conventional facilities. Alternative compact concepts plasmas becoming more mature electrons, but generation acceleration remain an outstandi...
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