Introduction: Radiation therapy using electron beams is a promising method due to its physical dose distribution. Monte Carlo (MC) code is the best and most accurate technique for forespeaking the distribution of dose in radiation treatment of patients.Materials and Methods: We report an MC simulation of a linac head and depth dose on central axis, along with profile calculations. The purpose o...

Background: High-energy linear accelerator (linac) is a valuable tool and the most commonly device for external beam radiation treatments in cancer patients. In the linac head, high-energy photons with energies above the threshold of interaction produce photoneutrons. These photoneutrons deliver the extra dose to the patients in the planning treatment and increase the risk of secondary cancer.O...

The overall achieved transmission for carbon ions through the injector linac at the Heidelberg ion therapy HIT did not ecxeed 30 % due to a mismatch of the beam at the RFQ entrance [1]. Thus a detailed upgrade programm has been started to exchange the RFQ with a new input radial matcher (IRM) design, to correct the misalignment and to optimize beam transport to the IHDTL. The aim is to achieve ...

Vertical vibration of linac components (accelerating structures, girders and quadrupoles) in the NLC has been studied experimentally and analytically. Effects such as structural resonances and vibration caused by cooling water both in accelerating structures and quadrupoles have been considered. Experimental data has been compared with analytical predictions and simulations using ANSYS. A desig...

We discuss capabilities, computational procedures, and recent improvements in the accelerator design code PARMILA. The name PARMILA stands for Phase and Radial Motion in Ion Linear Accelerators. We discuss the algorithms used in PARMILA, how the code designs individual linac sections to achieve efficient acceleration, and how it determines the distance between linac segments. We also discuss th...

The Linac Coherent Light Source (LCLS) X-ray free electron laser project is currently under construction at the Stanford Linear Accelerator Center (SLAC). A new injector and upgrades to the existing accelerator were installed in two phases in 2006 and 2007. We report on the commissioning of the injector, the two new bunch compressors at 250 MeV and 4.3 GeV, and transverse and longitudinal beam ...

The tight tolerances in the main linacs of the Next Linear Collider (NLC) result in a large sensitivity of the beam emittance to slow alignment drifts. Once the accelerator is tuned, the optimized emittances must be maintained. Slow alignment drifts will make resteering and reoptimization necessary. The frequency of these linac reoptimizations is an important parameter that determines how well ...

We have developed a concept for acceleration of a large phase-space, pulsed muon beam from 190 MeV to 50 GeV as part of a collaborative study of the feasibility of a neutrino factory based on in-flight decay of muons. The muon beam’s initial energy spread was ~20% and each bunch had the physical size of a soccer ball. Production of the muons will be quite expensive, so prevention of loss due to...

Proton linacs with very high beam power constitute the first part in the production chain for different applications. Proton beams of several tens of MW can be used to yield an extremely high flux of neutrons and other secondary particles. Hence, possible applications range from accelerator driven transmutation of nuclear waste and spallation neutron sources to irradiation installations for mat...