Numerical prediction of the performance of charged particle accelerators is essential for the design and understanding of these machines. Methods to calculate the self-fields of accelerated particles, the so-called space-charge forces, become increasingly important as the demand for high-quality bunches increases. For mesh-based space-charge solvers the knowledge of discontinuities in the parti...

In recent years there has been an increasing demand for non-invasive beam size monitoring on particle accelerators. Ideally these monitors should be cost effective and require little or no maintenance. These monitors should also be suitable for both linear and circular machines. Here, the experimental setup is described in detail and the results from a diffraction radiation beam size monitor ar...

The Tevatron at Fermilab is at present the world’s highest energy particle accelerator. After extensive refurbishments, data taking for Run II started in 2001, and by the end of 2003 over 200 pb of usable integrated luminosity had been accumulated by each Collider experiment, double the total for Run I. In preparation for Run II, the CDF detector also underwent an extensive upgrade. Of special ...

It is shown that a gravitationally collapsing black hole acts as an ultrahigh energy particle accelerator that can accelerate particles to energies inconceivable in any terrestrial particle accelerator, and that when the energy E of the particles comprising the matter in the black hole is ∼ 10 GeV or more,or equivalently the temperature T is ∼ 10 K or more, the entire matter in the black hole w...

There are three requirements in making a traveling wave accelerator: longitudinal electric field, synchronization, and confinement. We present and analyze a conceptually new kind of charged particle accelerator, making use of a photonic band gap lattice for field confinement near the beam axis, and employing dielectric material to produce a speed of light synchronous longitudinal electric field...

The ultracold plasma-based electron source has recently been proposed as an alternative to conventional photoinjectors or thermionic electron guns, which are widely used in today’s particle accelerators. The advantages of the ultracold plasma-based electron source lie in the fact that the electrons extracted from the cold plasma (from near threshold ionization of ultracold atoms) has very low t...

Background: Recently, multileaf collimators (MLC) have become an important part of any LINAC collimation system because they reduce the treatment planning time and improve the conformity. Important factors that affect MLCs collimation performance are leaves material composition and their thickness.Objective: In this study, we investigate main dosimetric parameters of a typical MLC includi...

Particle-In-Cell (PIC) codes are often used to study systems where the details of phasespace are important; for example, self trapping or optical injection in laser-plasma accelerators. Here we investigate the numerical heating and macro-particle trajectory errors in 2D PIC simulations of laser-plasma accelerators. The effects of grid resolution and laser polarization on the momentum spread and...

In this paper we present an automatic system developed for the Lisbon’s Technologic Nuclear Institute to control the operation of their particle accelerator. It is an accelerator based on a Van de Graaff machine. The system uses a personal computer running LabVIEW software which implements the procedures to automatically increase the terminal voltage, light-up the ion source and focus the parti...

Intrinsically stable or ‘fundamental’ solitons may be decorated with conserved charges which are pieces of those carried by elementary particles in the same medium. These ‘hairs’ are always significant in principle, and in the strong-coupling regime (where solitons and particles exchange roles) may become major factors in dynamics. ∗To appear in Proceedings of the CRM-FIELDS-CAP Workshop “Solit...