AIM The aim of this work was to develop multiple-source models for electron beams of the NEPTUN 10PC medical linear accelerator using the BEAMDP computer code. BACKGROUND One of the most accurate techniques of radiotherapy dose calculation is the Monte Carlo (MC) simulation of radiation transport, which requires detailed information of the beam in the form of a phase-space file. The computing...

The characterization of transverse particle distributions of bunches with non-Gaussian shapes is difficult due to a wide variety of possibilities [l]. Without knowing additional information one can tit a distribution using first-, second-, third-, and higher order moments [2]. These moments can then be used to describe beam shape changes along the accelerator, but with limited knowledge of the ...

Early fault detection and prognosis are crucial to ensure efficient safe operations of complex engineering systems such as the Spallation Neutron Source (SNS) its power electronics (high voltage converter modulators). Following an advanced experimental facility setup that mimics SNS operating conditions, authors successfully conducted 21 early experiments, where precursors introduced in system ...

Uniform three-dimensional ellipsoidal distributions of charge are the ultimate goal in charged particle accelerator physics because of their linear internal force fields. Such bunches remain ellipsoidal with perfectly linear position-momentum phase space correlations in any linear transport system. We present a method, based on photoemission by radially shaped femtosecond laser pulses, to actua...

Stanley J. Brodsky,1, ∗ Carl E. Carlson,2, † John R. Hiller,3, ‡ and Dae Sung Hwang4, § Stanford Linear Accelerator Center, Stanford University, Stanford, CA 94309 Particle Theory Group, Physics Department, College of William and Mary, Williamsburg, VA 23187-8795 Department of Physics, University of Minnesota-Duluth, Duluth, MN 55812 Department of Physics, Sejong University, Seoul 143-747, Kore...