Kahle, K SVC, Static Var Compensator, status, 2009, IEFC, SPS, PSB, BEQ1, BB3, spare parts, harmonic filters, saturated reactor 2009 2009 As of 1 January 2009, CERNs Static Var Compensators have been transferred from EN-EL to TE-EPC. During 2009, the SVC's will be operated jointly by these two groups. This technical note describes the technical state of the Static Var Compensators (2009), gives an overview of required renovation work and analyses the situation of spare parts. In particular, the document discusses to which degree budgets shall be allocated to maintain and continue to operate the spare SVCs BEQ1 (1974) and BB3 (1982) for SPS. Should we invest in a complete renovation of BEQ1 and BB3, or should we purchase additional spare parts for the modern BEQ2 and BEQ3? The strategy proposed in this technical note has been approved by the IEFC on 4.9.2009. Prost, A septa électrostatique fluorinert 2009 2009 Suite à de nombreux problèmes de destruction de câbles PB300b d’alimentation des Septa électrostatiques de l’accélérateur PS, il a été choisi de les remplacer par un câble de type EPR. En effet ces câbles haute tension PB300b devenus trop vieux et installés en milieu radioactif ne tiennent plus la tension nominale requise pour les Septa. De plus ceux-ci ne sont plus fabriqués dans l’industrie ce qui empêche tout échange avec un câble similaire. Le câble type EPR est basé sur une technologie plus récente et est aussi plus résistant à la radiation. Il a fait ses preuves dans le passé étant utilisé pour l’alimentation des Septa électrostatiques ZS situés sans le SPS. Étant donné que le câble PB300b 300 kV n’a pas les mêmes dimensions que le câble EPR, il a été nécessaire d’adapter une fiche compatible avec ce nouveau câble et la traversée utilisée sur les Septa électrostatiques du PS. L’ancien câble PB330b est utilisé avec de l’huile comme liquide diélectrique dans la traversée. Tenant compte, en cas de fuite de la traversée des risques de pollution du vide du septum, et de l’accélérateur PS, il a été décidé de remplacer l’huile comme liquide diélectrique par du Fluorinert non polluant si une fuite apparait dans l’enceinte à vide. L‘adaptation des fiches HT pour le câble EPR en tient compte également. Newborough, A 2009 2009 The last high voltage test (Fig 1) for the PSB was conducted in 1997. In view of the LHC operation starting later in the year a repeat of this high voltage test has been conducted during the hardware test period (March 2009) to verify the ground insulation of the PSB main magnet circuits Ilie, Sorin Senetscu, Radu Cable insulation Polymeric materials Radiation aging Polymers lifetime 2009 2009 Within TE - VSC Group, the Chemistry Laboratory actually works on the project entitled “Studies of Radiation Induced Aging Effects in Polymeric Cable Insulators”. The aim of the project is the characterization and the evaluation of the aging effects mainly induced by ionizing radiations on the various polymeric materials in cables structure. It is expected, using the accumulated data, to foresee the life-time of these materials in the specific CERN accelerator systems and, also, to assure an acceptance quality control of the supplied cables in CERN. Cravero, Jean Marc Martins, Carlos A Gómez-Costa, J L Wassinger, Nicolás García Retegui, Rogelio Benedetti, Mario Kloster, Walter MEGADISCAP Controller Linac 4 2009 2009 This document presents the implementation of a control system for a new multiple-stage pulsed current source converter. A new topology that has been proposed to overcome some limitations inherent to capacitor discharge converter is presented in detail and explained. Its implementation is described and the design considerations adopted are accounted for. Besides, a control strategy is proposed, which has been implemented using an existing control board with some modifications on the acquisition system. A prototype whose current and voltage are scaled down with respect to those required for the converters that will be used for CERN Booster injection with LINAC 4 has been built. This reduced scale system has been simulated taking into account the control system implementation. Finally, the topology operating principle has been validated, the results obtained with the scaled down prototype have been compared with simulations and the need for more hardware resources for the control system implementation has been demonstrated. Principe, R 13 kA bus bars LHC hollow copper 2009 2009 The document includes a list of the LHC bus bars and their reference drawings per magnet type, and specifically: • The Main Bending magnets, also called MB, • The Magnet Quadrupoles, the MQs, • The quadrupoles in the LHC Dispersion Sections, MQDS, • The quadrupoles in the Matching Sections, named MQMs, • The Cryogenic Connections (CC) and • The DFB shuffling modules.