We explore the NLC linac optics compatible with a low energy scenario where initially only part of the full linac is installed. Optics modification suitable for a low energy beam running and upgrade to the nominal energy is discussed. Linac parameters and beam tolerances in the modified lattice are compared to the nominal design. Abstract We explore the NLC linac optics compatible with a low en...

In the frame work of the Italian participation to the project of a high intensity proton facility for the energy amplifier and nuclear waste transmutations, the LNL has been proposed a project for the construction of a second generation facility for the production of radioactive ion beams (RIBs) by using the ISOL method. The final goal consists in the production of neutron rich RIBs with masses...

Secondary particles produced in spallation reactions of cosmic rays with the interstellar gas provide valuable information that allow us to investigate injection and transport charged Galaxy. A good understanding cross sections production these is crucial correctly interpret our models, although existing experimental data very scarce uncertain. We have developed a new set sections, both inelast...

Neutron energy spectra at high energy electron accelerators outside concrete shielding of various thicknesses (30 to 240 cm at 65-95 degrees) have been calculated at three electron energies (100 MeV, 1 and 10 GeV) and an optimum Cu target of 30.48 cm long and 5.08 cm in radius with the FLUKA Monte Carlo code. Dose quantities such as the protection quantity of Effective dose E and the operationa...

The real-time operation of a linac-MRI system will require proper radio frequency (RF) shielding such that the MRI images can be acquired without extraneous RF noise from the linac. We report on the steps taken to successfully shield the linac from the MRI such that the two devices can operate independently of one another. RF power density levels are reported internally and externally to the RF...

The Spallation Neutron Source (SNS) project is a collaboration among Argonne, Brookhaven, Jefferson, Lawrence Berkeley, Los Alamos and Oak Ridge National Laboratories. The Linac, which injects beam into an accumulator ring, is comprised of both normal and superconducting rf (SRF) accelerating structures. Two room-temperature rf structures, a 402.5-MHz drift-tube linac (DTL) and an 805-MHz coupl...

It has been suggested for quality assurance purposes that linac output variations for helical tomotherapy (HT) be within +/-2% of the long-term average. Due to cancellation of systematic uncertainty and averaging of random uncertainty over multiple beam directions, relative uncertainties in the dose distribution can be significantly lower than those in linac output. The sensitivity of four HT c...

In view of a possible evolution of the CERN accelerator complex towards higher proton intensities, a 2.2 GeV H linac with 4 MW beam power has been designed, for use in connection with an accumulator and compressor ring as proton driver of a muon-based Neutrino Factory. The high-energy part of this linac can use most of the RF equipment (superconducting cavities and klystrons) from the LEP colli...