Introduction: In electron beam treatment, because of the non-point electron beam source, inverse-square law cannot be applied for dosimetry in different treatment intervals. Therefore, providing source-surface distance (SSD) charts in all clinics is of paramount importance. This study aimed to determine the effective SSD for various electron beam energies and field sizes and to...

The acceleration gradient of a conventional RF accelerator is limited to about 50 MeV/m. To generate TeV electrons for next generation high energy physics, an RF accelerator would require a distance exceeding 20 km. In this paper, we propose a dielectric-based, multistaged, laser-driven electron linear accelerator operating in a vacuum that is capable of providing 1 TeV electrons in 1 km. Our s...

Laser driven plasma waves have up to now been considered exclusively as second stage accelerators. Conventional finacs are used in this case as the first stage of acceleration to inject MeV electrons into the plasma. This paper shows it to be advantageous to instead use laser wake fields in the first stage for greater simplicity and better emittance. The concept presented makes this possible wi...

An important limit for energy gain in laser-plasma wakefield accelerators is the dephasing length, after which the electron beam reaches the decelerating region of the wakefield and starts to decelerate. Here, we propose to manipulate the phase of the electron beam in the wakefield, in order to bring the beam back into the accelerating region, hence increasing the final beam energy. This rephas...

The Maryland Infrared Free Electron Laser is being constructed at the University of Maryland, and is expected to lase in the far infrared. The accelerator driving the laser is a 10 MeV linac which is being assembled in an “in-line” configuration. The design work for the accelerator was accomplished using Trace-3D and PARMELA computer simulations. When the accelerator is completed, it will be ab...

Introduction: The use of electrons in the electron therapy to destroy tumoral tissue is dedicated significant contribution of different methods of radiation therapy. Scattered radiation due to exited electrons of the applicator affect the dose out of the field in the patient's normal tissue. The aim of this study is to determine the peripheral dose outside the applicator in the...

Astrophysical neutron capture rates of light and heavy nuclei have been measured and calculated. For the measurements the activation technique was applied at the 3.75 MV Karlsruhe Van de Graaff accelerator, and at the Geel electron linear accelerator (GELINA) the time–of–flight (TOF) method was used. The calculations were performed using direct and compound nuclear capture models.

Blood and blood products are irradiated with gamma rays to reduce the risk of graft versus host disease (GVHD). A simple technique using electron beams produced by a medical linear accelerator has been studied to evaluate irradiation of blood and blood products. Variations in applied doses for a single field 20 MeV electron beam are measured in a phantom study. Doses have been verified with ion...