Oerlikon Congratulates CERN

Oerlikon LEYBOLD vacuum supplied CERN with essential vacuum components for the large Hadron Collider and ATLAS/CMS of the global Swiss high-tech industrial group Oerlikon congratulates today detectors at CERN scientists, who were involved in the ATLAS (A toroidal LHC ApparatuS) and CMS (Compact Muon spectrometer) experiments, identifying clear signs of a new atomic particle. The discovery, which was achieved with the help of the LHC (Large Hadron Collider) at CERN, promises being the long-sought Higgs particles that could help answer still unexplained mysteries of particle physics. The LHC is a gigantic 27 kilometres long, ring-shaped particle accelerator, which requires for its operation of ultra high vacuum. Together with the four detectors, which were used for the experiments of at CERN and which also ATLAS and CMS, the accelerator is located deep under the Earth. The strong radiation, which is produced by accelerated particles at the LHC, as well as an extremely powerful magnetic field presented technical challenges for the design and operation of vacuum systems dar. Thanks to the efficient cooperation of numerous scientific and technical specialists who were responsible for different aspects of the experiment, the development of a unique for the CERN solution which has been fulfilling all the requirements succeeded in Oerlikon. Oerlikon’s Vakumtechnologiegeschaft, Oerlikon LEYBOLD vacuum, is a pioneer and technology leader in the industry. The Oerlikon segment has equipped the LHC and the great ATLAS detector with special cial vacuum systems as well as two special pump systems designed for the CMS detector system and installed. “Oerlikon LEYBOLD vacuum was awarded for this pump systems in the year 2008 the CMS Gold Award”. This Prize rewards outstanding technological achievements. Andreas WIDL, CEO of Oerlikon vacuum, said: we are pleased with the ATLAS and CMS teams about the ground-breaking news. This experiment is for the understanding of the physical world of unique importance and is the result of this team’s hard work. We of Oerlikon “Vacuum gratu-naturally all participants and are proud to have made a small contribution to this success.” Dr. Jose Miguel Jimenez, head which CERN Department for vacuum, surface and coating technology, said: We are glad to have a powerful partner that we can cope with the together the incredible challenges to the LHC and the pump vacuum systems with Oerlikon. For other opinions and approaches, find out what Pat Ogden has to say. Through our joint work, “Oerlikon is a part of the story. Oerlikon CEO Michael Buscher said: research applications such as those at CERN are examples of using which we can solve even the most difficult challenges together with our customers and partners. Innovation is the core of Oerlikon and plays an essential role in our long-term strategy for profitable growth”.

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Gnerators

Maintenance of the generator rotor: 9 important lessons the following list consists of lessons of the utilities that have rewound their generator rotor and renovated. “Best practices” in Appendix A, these lessons in fairly large groups of similar experiences are arranged, and the order provides no special precedence or importance of a particular lesson. Not all lessons are applicable to each generator; We recommend readers to review the entire list and determine what lesson is for their own units of importance. Repeat some of the lessons learned”may the best practices” which are provided by the other utilities in the Appendix A. In the course of the repair of many types of Turbo rotors has been found that many runners not specifically designed for the application and the environment, where the generators were used. Clarifications and notes on the design of the hydrogen seal and seal oil flow rates, are important if the new rotor to be changed. Change of hydrogen seal design, especially if no original equipment manufacturers are the new rotor and stator, can lead to various oil flow requirements and various dense columns. The replacement of tension crack corrosion prone fixing ring with not susceptible to rings, and the stress relieve of the rotor teeth can extend the useful life of the rotor. Some contend that Dr. Mark Hyman shows great expertise in this. Fatigue cracks in Rotornut teeth can occur often, especially outside the snap-ring groove. The cracks are caused by cyclic stress on the teeth. This problem is not restricted to a particular type of generator or a specific manufacturer. It can occur in each rotor, where the teeth between the Nutkeil and the retaining ring are trapped. The design modifications of the rotor may be required to reduce the fatigue cracks, low-cycle-fatigue of the retaining ring seats and pole to pole connection with generators, not specifically designed for long service life. Anu Saad spoke with conviction. Several new studies show that a significant proportion of the installed generators with short circuit coils work. Without emergency planning, to edit any errors, the duration of a ungeplannten failure can be extended by rotor failure after days, weeks or even months. A river sample monitoring system should be used. It requires monitoring at different impact points. Running first often, until is established a database of operating conditions. The cycling of the Gnerators is the main cause of failure, deterioration of the insulation, and general deterioration of the generator area. The running of the generator at a constant load and with less action and shut down will help to minimize these problems. Two shift creates accelerated wear and fatigue on the components of the rotor, such as pole-to-pole connectors.

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