نتایج جستجو برای: linear accelerator
تعداد نتایج: 493037 فیلتر نتایج به سال:
Early tests of short low group velocity and standing wave structures indicated the viability of operating Xband linacs with accelerating gradients in excess of 100 MeV/m. Conventional scaling of traveling wave traveling wave linacs with frequency scales the cell dimensions with λ. Because Q scales as λ, the length of the structures scale not linearly but as λ in order to preserve the attenuatio...
The continuing need for accelerators of increasingly sophisticated characteristics requires a great variety of rf sources to provide the energy used by these accelerators. The present status of gridded tubes will be reviewed briefly. Klystrons, which are used in most large accelerators, will be considered in some detail. Their limitations in power and frequency will be reviewed and a study of t...
Introduction In this note a scheme for the collection, phase rotation and cooling of muons for a neutrino factory is reported. The scheme is sufficiently generic to be site independent also if some particular choices are influenced by the CERN design. The system discussed in this note is worked on as a possible alternative to the induction linac scheme [1]. The results presented assume the foll...
A compact standing-wave linac has been designed using S-band microwaves for medical and industrial applications. It uses a bi-periodic structure with constant impedance. It consists of a buncher section with three-cells and on-axis coupled cavities with nine-cells. The total length is 740.0 mm including the electron gun. Using SUPERFISH, HFSS and PARMELA codes, it is capable to deliver 4.5 MeV ...
Vibration measurements of the linear accelerator structures in the SLC linac show a 1 micron rms vertical motion. This motion reduces to 0.2 micron rms motion when the cooling water to the accelerator structures is turned off. The quadrupoles have 250 nanometer rms vertical motion with the accelerator structure cooling water on and 60 nanometer motion with it off. These results together with me...
The purpose of this study is to report the dosimetric aspects of commissioning performed on an Elekta Versa HD linear accelerator (linac) with high-dose-rate flattening filter-free (FFF) photon modes and electron modes. Acceptance and commissioning was performed on the Elekta Versa HD linac with five photon energies (6 MV, 10 MV, 18 MV, 6 MV FFF, 10 MV FFF), four electron energies (6 MeV, 9MeV,...
A basic and clinical study of radiosurgery using the linear accelerator (Linac) system for unremovable deep-seated brain tumors is reported. A Komai stereotactic ring was used to locate the target coordinates. The patient was laid on the Linac treatment table and held in the head fixation system. Irradiation was given in five positions. The dose profile by film dosimetry and Rando phantom was s...
Related Articles A pepper-pot emittance meter for low-energy heavy-ion beams Rev. Sci. Instrum. 84, 025117 (2013) FLUTE: A versatile linac-based THz source Rev. Sci. Instrum. 84, 022705 (2013) Electron diffraction using ultrafast electron bunches from a laser-wakefield accelerator at kHz repetition rate Appl. Phys. Lett. 102, 064104 (2013) Cooperative accumulation of coherent undulator radiatio...
The Compact LInear Collider (CLIC), presently under study at the European Organization for Nuclear Research (CERN), aims at colliding high-energy “nanobeams” at a luminosity of 10 cm−2s−1. Vibrations of the lattice elements, if not properly corrected, can result in a loss in performance by creating both unacceptable emittance growth in the linear accelerator and relative beam-beam offsets at th...
Matrix multiplication (MM) is a key linear algebra routine which has been widely used in many application areas. In this work we provide a high-performance single-precision dense MM FPGA accelerator, and also an automatic generator to generate the accelerator with high throughput and high resource efficiency based on hardware and MM workload specifications. The accelerator adopts the linear sys...
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