J Begg, A George, S Alnaghy, T Causer, T Alharthi, L Glaubes, B Dong, G Goozee, G Liney, L Holloway, P Keall 1 Department of Medical Physics, Liverpool and Macarthur Cancer Therapy Centre and Ingham Institute for Applied Medical Research, Sydney, Australia, [email protected] 2 Centre for Medical Radiation Physics, University of Wollongong, Wollongong, NSW, Australia 3 Institute of M...

The Linac Coherent Light Source (LCLS) X-ray free electron laser project is currently under construction at the Stanford Linear Accelerator Center (SLAC). A new injector and upgrades to the existing accelerator were installed in two phases in 2006 and 2007. We report on the commissioning of the injector, the two new bunch compressors at 250 MeV and 4.3 GeV, and transverse and longitudinal beam ...

An addendum to the AAPM's TG-51 protocol for the determination of absorbed dose to water in megavoltage photon beams is presented. This addendum continues the procedure laid out in TG-51 but new kQ data for photon beams, based on Monte Carlo simulations, are presented and recommendations are given to improve the accuracy and consistency of the protocol's implementation. The components of the un...

One option in building a future 500 GeV c.m. linear collider is to use superconducting 1.3 GHz 9-cell cavities. However, wakefields excited by the bunch train in the TESLA (TeV-Energy Super Conducting Linear Accelerator) collider can resonantly drive the beam into unstable operation such that a BBU (Beam Break Up) mode results or at the very least significant emittance dilution occurs. The larg...

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