We present an analysis of the acceleration scenario for a high-energy μμ collider. Acceleration from GeV to TeV energies is required, accompanied by bunch compression to colllider-scale bunch lengths. The baseline scenario is a cascade of recirculating linacs (RLAs), with each linac increasing the beam energy by an order of magnitude. Bunch compression can occur both in the linacs themselves an...

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...

background: the monte carlo method is the most accurate method for simulation of radiation therapy equipment. the linear accelerators are currently the most widely used machines in radiation therapy centers. methods: in this work, a monte carlo modelling of the siemens oncor linear accelerator in 6 mv and 18 mv beams was performed. the results of simulation were validated by measurements in wat...

The aim of this study was to characterize electron contamination a flattened (FF) and an unflattened (FFF) Varian Clinac iX 6X 15X photon beams using Monte Carlo (MC) simulation. EGSnrc MC technique used model the head simulate dose distribution FF FFF beam in water phantom. materials geometrical data linac were provided by Tan Tock Seng Hospital (TTSH) Singapore. modeled removing flattening fi...

The program PLACET is used to simulate transverse and longitudinal beam effects in the main linac, the drive-beam accelerator and the drive-beam decelerators of CLIC, as well as in the linac of CTF3. It provides different models of accelerating and decelerating structures, linear optics and thin multipoles. Several methods of beam-based alignment, including emittance tuning bumps and feedbacks,...

We are designing a compact inverse Compton scattering hard X-ray (33 keV) source based on X-band linac. X-band 1.5and 3.5-cell photocathode RF guns and X-band linac were analyzed with PARMELA simulation, and X-ray flux was estimated for several types of lasers. The theoretical scaling law of the RF guns among charge, emittance, and RF wavelength is confirmed by PARMELA. The maximum RF field at ...

This note describes simulation studies of the H beam matching condition between a 750keV rod radio-frequency quadrupole (RFQ) and the existing Fermilab drift tube linac (DTL). The RFQ design used in this study is that of an existing RFQ designed and built by A. Schempp from IAPGoethe University. It is assumed that the medium-energy beam transport (MEBT) line uses hardware built for a positron e...

A first Design Study Report has recently been completed [1] for the Linac Coherent Light Source (LCLS), a proposal to build an x-ray Free Electron Laser (FEL) at the Stanford Linear Accelerator Center (SLAC) as a single pass SASE (SelfAmplified Spontaneous Emission) amplifier. The proposal includes the use of a very low emittance electron beam accelerated up to 15 GeV by the last third of the S...

The Next Linear Collider main linacs are 13 km linear accelerators which each contain approximately 750 hybrid iron/permanent-magnet quadrupoles in a FODO array. The small amount of vertical emittance dilution permitted in the main linacs implies a tight tolerance on the RMS distance between the beam and the centers of the quads. We describe two methods for measuring the offsets between the qua...

Radiation therapy is an established method of cancer treatment. New technologies in cancer radiotherapy need a more accurate computation of the dose delivered in the radiotherapy treatment plan. This study presents some results of a Geant4-based application for simulation of the absorbed dose distribution given by a medical linear accelerator (LINAC). The LINAC geometry is accurately described ...