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The concept of sharing a high-power proton accelerator (proton driver) between neutrino production and other facilities such as a high-energy collider or a spallation neutron source is an attractive, cost-effective solution which is being studied in site-specific cases as part of accelerator upgrade plans at CERN and at the ISIS facility at the Rutherford Appleton Laboratory. Descriptions of these proton-driver scenarios will be given primarily in the context of the Neutrino Factory, but other neutrino production plans at CERN will also be noted.

A short overview about the potential of polarized beams at future colliders is given. In particular the baseline design for polarized beams at the ILC is presented and the physics case for polarized $e^-$ and $e^+$ is discussed. In order to fulfil the precision requirements spin tracking from the source to the interaction point is needed. Updates concerning the theoretical calculations as well as their implementation in simulation codes are reported., 5 pages, contribution to the proceedings of EPS07

759363 3 pp. (2007)., The positron source for the International Linear Collider (ILC) is a helical undulator-based design, which can generate unprecedented quantities of polarised positrons. The HeLiCal collaboration [1] takes responsibility for the design and prototyping of the superconducting helical undulator, which is a highly demanding short period device with very small aperture, and also leads the start to end simulations of the polarised electrons and positrons to ensure that the high polarisation levels generated survive from the source up to the collision point. This paper will provide an update on the work of the collaboration, focusing on these two topic areas, and will also discuss future plans.

Spin polarization will play an important role in the International Linear Collider (ILC) physics program. The ‘heLiCal’ collaboration aims to provide a foil analysis of all depolarization effects at the ILC. As expected intuitively, the depolarization in damping rings with carefully corrected orbits is shown to be negligible. No noticeable depolarization is observed in the beam delivery system. The major depolarization effects are expected from the beam‐beam interaction. These effects have been evaluated by the ‘heLiCal’ collaboration for a range of ILC parameter sets.

3 pp. (2006)., The baseline positron source for the International Linear Collider is a helical undulator based design which can generate unprecedented quantities of polarised positrons [1]. A major thrust of the global design in this area is led by the UK based HeLiCal collaboration [2]. The collaboration takes responsibility for the design and prototyping of the helical undulator itself, which is a highly demanding short period device with very small aperture, and also leads the start to end simulations of the polarised particles to ensure that the high polarisation levels generated are maintained from the source, right through the beam transport systems and up to the interaction point itself. This paper will provide an update on the work of the collaboration focussing on these two topic areas and will also discuss future plans.