Background: The commissioning accuracy of Volumetric Modulated Arc Therapy (VMAT) need to be evaluated.Objective: To test and evaluate commissioning accuracy of VMAT based on the TG 119 protocols at local institution. Material and Methods: The phantom, structure sets, VMAT and IMRT beam parameter setup, dose prescriptions and planning objectives were following TG 119 guidelines to c...

At Peking University (PKU) a new helium injector for coupled radio frequency quadrupole(RFQ) and separated function radio frequency quadrupole(SFRFQ) within one cavity, so called as coupled RFQ & SFRFQ, was designed recently[1]. It will provide a 30keV 10mA He beam whose emittance is less than 0.15 π.mm.mrad for the accelerator. It is a combination of a 2.45GHz PKU permanent magnet electron cyc...

We report on the successful commissioning of the Francium Trapping Facility at TRIUMF. Large laser-cooled samples of francium are produced from a francium ion beam delivered by the ISAC radioactive ion beam facility. The ion beam is neutralized on an yttrium foil, which is subsequently heated to transfer the atoms into the magneto-optical trapping region. We have successfully trapped 207Fr, 209...

Forward protons with momenta close to the beam momentum arise either from elastic scattering or from single or double diffraction. These protons are very close to the beamline and can only be measured downstream using “beam close detectors”. In this paper we present a complete study of the optics (low, medium and high beta), possible locations of the detectors and running scenarios for these me...

The Control System for Linear IFMIF Prototype Accelerator (LIPAc) consists of six subsystems; Central Control System (CCS), Local Area Network (LAN), Personnel Protection System (PPS), Machine Protection System (MPS), Timing System (TS) and Local Control Systems (LCS). The LIPAc provides deuteron beam with beam power more than 1 MW, and this control system is required the high reliability and u...

Beam commissioning of the new proton therapy system for University of Tsukuba was started in September 2000. The present system employs a synchrotron with a maximum energy of 250MeV and two rotating gantries. The beam was successfully accelerated up to 250MeV and transported to the irradiation nozzles. The position of the beam extracted from the synchrotron was confirmed to be very stable and s...

Six years before the scheduled commissioning of the LHC at CERN, the basic list of beam instruments has been established. This early date is needed due to the impact of the mechanical design of some detectors (mainly the beam position detectors) on the cryogenic part of the machine as well as for other projects due to the long R&D period (emittance measurements, tune and chromaticity diagnostic...

In commissioning of an e − e− collider, a great deal of effort is put to search and to remove origin of the luminosity reduction. We have studied luminosity reduction mechanisms using computer simulations to help the jobs. We consider collision among an electron bunch and a positron bunch; that is, do not consider any multi-bunch effects. One turn map of beam particles consists of the beam-beam...

The beam position monitor (BPM) system has been developed at BESSY and operates in 3 different modes: the closed orbit, the single turn, and the diagnostics mode. Details of the BPM system are presented together with the result of some bench tests. The commissioning of the system was done primarily with beam-based techniques and is described in more detail. First measurements of fast and slow b...

In recent years the "crab-waist collision" scheme [P. Raimondi, Proceedings of 2nd SuperB Workshop, Frascati, 2006.; M. Zobov et al., Phys. Rev. Lett. 104, 174801 (2010)PRLTAO0031-900710.1103/PhysRevLett.104.174801] has become popular for circular e^{+} e^{-} colliders. The designs of several future colliders are based on this scheme. So far the beam-beam effects for collisions under a large cr...