Background: Use of contrast agents (CAs) during CT simulation for treatment planing system leads to changes in  electron density. In this study we aimed to investigate the effect on  calculated dose of various concentrations of CAs on treatment planing systems in different dose calculation algorithms. Materials and Methods: Contrast agent (0.769 mg/ml Iopromid) - water mixtures at con...

The Linac Coherent Light Source (LCLS) is a freeelectron laser facility in construction at Stanford Linear Accelerator Center. It is designed to operate in the wavelength range 0.15-1.5 nanometers. At the time of this conference, civil construction of new tunnels and buildings is complete, the necessary modifications to the SLAC linac are complete, and the undulator system and x-ray optics/diag...

The TRIUMF-VECC Electron Linac is a device for gamma-ray induced fission of actinide targets, with applications in nuclear physics and material science. A phased construction and commissioning scheme will eventually lead to a 50 MeV, 10 mA CW linac based on superconducting RF technology. Using this linac to deliver high intensity electron beams for applications such as an energy-recovered light...

The Proof-of-Principle (POP) prototype of the Rf-Focused Drift tube (RFD) linac structure is currently under test at Linac Systems, after years of delay due to a variety of technical problems. A discussion of these technical problems and their solutions will be presented. The status of these tests will be reported. Plans for future development of this linac structure will be revealed. Potential...

After entering into the full-commissioning phase of the KEKB linac in May, 1998, we have established two linac injection modes for the KEKB ring: an 8-GeV electron beam and a 3.5-GeV positron beam, as well as beam modes for the rings of the synchrotron light sources. All modes are easily switched for almost one minute without any trouble. The linac beam characteristics have been substantially i...

Presently a new accelerator complex is being planned at CERN, which will replaced the ageing Proton Synchrotron (PS). A high-power160 MeV H linac (Linac 4) will replace the present 50 MeV proton linac injector [1], a 5 GeV Superconducting Proton Linac (SPL) will replace the 1.4 GeV PS Booster (PSB) [2] and a 50 GeV synchrotron (PS 2) will replace the 26 GeV PS [3]. A tentative layout of the pla...

judicious use of the SLC linac, damping rings, and positron High-energy ring (HER) Low-energy ring (LER) source.. Particles per bunch ._, -. _ II. ROLE OF R&D PROGRAM IN OVERALL PEP-II INJECTION High-energy ring (HER) Low-energy ring (LER) The overall goals of the PEP-II Injection System are Linac repetition rate summarized in Table 1. These differ from those given in Linac current range during...

The SNS is a spallation neutron research facility being built at Oak Ridge National Laboratory in Tennessee [1]. The Linac portion of the SNS (with the exception of the superconducting cavities) is the responsibility of the Los Alamos National Laboratory (LANL), and this responsibility includes the RF system for the entire linac. The linac accelerates an average beam current of 2 mA to an energ...

The peak current limit for the Fermilab Linac was recently studied. The purpose was to learn what components of the present Linac can be used for the first stage of a proposed proton driver[1]. For this application the Linac must provide a H beam in excess of 5000 mAμsec per pulse. The original Fermilab Linac was designed for protons with a peak current of 75 mA and a pulse length of four Boost...

We report on measurements of the bunch energy spectrum at the end of the SLAC linac. Using the spectra obtained for two different linac rf phases we obtain both the bunch induced voltage and the longitudinal distribution of the bunch. The measurement results are compared with theoretical predictions. In particular, the induced voltage is in good agreement with that obtained using the calculated...