Summary of the LHC Workshop on Dynamic Effects and their Control

A brief overview is given of the discussions and recommendations formulated during the ³LHC Workshop on Dynamic Effects and their Control². The workshop took place at CERN from 5 to 7 February 1997 in order to discuss the required performance for the control of the LHC beams and the accuracy, reproducibility and stability of various key equipment in the presence of the expected dynamic effects of the LHC superconducting magnets

Electrical powering strategy of LHC: first design study

Superconducting accelerators, and in particular the LHC, require detailed analysis of the electrical powering due to the integrated nature of these machines. The situation is made more difficult in LHC where the maximum use needs to be made of the existing infra-structure, notably the AC electrical distribution and the underground excavations of LEP. This, coupled with the dynamic performance of the main dipole magnets, the quench protection requirements and the needs of the accelerator physics, have meant that new powering techniques, as well as tighter power converter perform-ance specifications, will be required. A description of the powering system of LHC is given along with the reasons for adopting certain solutions. The static and dynamic requirements of the machine are also discussed and the first ideas for solving some of these problems are presented. In all the LHC will use about 1500 power converters able to supply approximately 1750 kA in total. Some of the on-going studies to achieve a better optimisation of the powering system are also discussed

Update on the powering strategy of LHC

Over the last two years the powering strategy of the Large Hadron Collider (LHC) has undergone a considerable evolution. This was not only motivated by new requirements but more importantly by a quest to reduce costs and improve operational reliability and flexibility. In order to achieve this, despite an increase in complexity, novel modifications to the strategy and hardware have been proposed both on the warm and cold sides of the machine. During this process the requirements of the accelerator physics have been clarified and met while working within the boundary conditions imposed by the utilisation of the existing CERN infrastructure. After a brief review of the present powering strategy which needs to produce and supply 2MA dc in 1800 circuits, more detailed descriptions will be given of the changes implemented in order to achieve a more rational overall system. Some performance issues of the powering system will also be discussed

Oversight and legislative tools for Parliament to facilitate and monitor the realisation of children's rights

Developed for training of SADC Members of Parliament, September 2005

Budgeting for children's care, development and protection

Presented at South African Human Rights Commission and UNICEF's Budget breakfast, 23 February 2012