نتایج جستجو برای: multi beam
تعداد نتایج: 572381 فیلتر نتایج به سال:
PURPOSE The purpose of this report is to describe the proton therapy system at Samsung Medical Center (SMC-PTS) including the proton beam generator, irradiation system, patient positioning system, patient position verification system, respiratory gating system, and operating and safety control system, and review the current status of the SMC-PTS. MATERIALS AND METHODS The SMC-PTS has a cyclot...
Multi-beam satellite systems have been studied a lot in the last ten years. They have many promising features like power gain, interference reduction, high flexibility to adapt the asymmetric traffic distribution, and the improvement of the system capacity compared with single-beam systems. In multi-beam satellite systems, the beamforming antenna can generate a number of spot beams over the cov...
in this paper, an interference management for multi-beam satellite network to enhance spectral efficiency is studied. first, a two-satellite for future generation satellite network using cognitive radio technology is provided.this network is composed of a secondary satellite and aprimary satellite where the primary satellite system does not suffer from severe destructive interferences coming fr...
Every accelerator or storage ring system consists of a charged particle beam propagating through a beam line. Although a number of computer programs exist that simulate the propagation of a beam% a given beam line, only a few provide the capabilities for designing, commissioning and operating the beam line. This paper shows how a “multi-track” simulation and analysis code can be used for these ...
The spot-diffusing technique provides better performance compared to conventional diffuse system for indoor optical-wireless communication (OWC) system. In this paper, the performance of an OW spot-diffusing communication system using Neuro-Fuzzy (NF) adaptive multi-beam transmitter configuration has been proposed. The multi-beam transmitter generates multiple spots pointed in different directi...
The time dependence of B d B d mixing has been observed in events containing high-P t leptons using a highly inclusive v ertexing method to determine the B decay position. The initial state B hadron avor was determined using the large forward-backward asymmetry provided by the highly polarized electron beam of SLC in combination with a jet charge technique. From a sample of 150,000 hadronic Z d...
A-technique for beam based alignment of sextupole systems is developedexploitingtbeenhancementeffectoforbitdifferencesby the sxt4daThis technique can in principle be applied to sextupole or sextupole strings with controlled orbit pattern and BPM configuration. This paper will discuss the theoretical basis, s~ialoptimizationconsiderationsandexpectedaccuracy. Application to the SLC final focus is...
Multi-beam heavy-ion accelerators are considered as promising drivers for inertial fusion energy. The High Current Experiment (HCX) at Lawrence Berkeley National Laboratory (LBNL) will test driver-scale beam dynamics in a single transport channel. Single bore, NbTi superconducting quadrupoles are being developed for the HCX, taking into account their possible use as modules in a quadrupole arra...
Beam dynamics simulations of the proposed Rare Isotope Accelerator (RIA) [1] driver linac have been done. The RIA driver linac is designed to accelerate stable ion beams from proton to uranium to final energies of 400 MeV/u for the heaviest and about 900 MeV/u for the lightest ions with beam powers of 100 to 400 kW. Two stripping sections are used to increase the charge state of heavy ions and ...
Multi-slit triode ion-optical systems with spherical electrodes are of interest for formation of intense focused neutral beams for plasma heating. At present, two versions of focusing multi-slit triode ion optical system are developed. The first ion optical system forms the proton beam with 15 keV energy, 140 A current, and 30 ms duration. The second ion optical system is intended for heating n...
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