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Page |
| WEPKF011 |
Performance of the Superconducting Matching Quadrupoles for the LHC Insertions
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1615 |
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- N. Catalan-Lasheras, G. Kirby, R. Ostojic, J.C. Perez, H. Prin, W. Venturini Delsolaro
CERN, Geneva
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The optics flexibility of the LHC insertions is provided by the individually powered quadrupoles in the dispersion suppressors and matching sections. These units comprise special quadrupole magnets of the MQM and MQY type and range in length from 5.4 m to 11.4 m. In total, 82 insertion quadrupoles will be assembled at CERN. In this paper we present the advance in construction and report on the performance of the first series built quadrupoles. In particular, we present the quench performance of the individual magnets and alignment measurements of the cold masses, and discuss the field quality trends and possible implications.
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| WEPKF017 |
The 5 T Superconducting Undulator for the LHC Synchrotron Radiation Profile Monitor
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1630 |
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- R. Maccaferri, M. Facchini, R. Jung, D. Tommasini, W. Venturini Delsolaro
CERN, Geneva
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A Synchrotron Radiation Profile Monitor will be used in the LHC to measure the beam profiles from the injection energy of 450 GeV to the nominal energy of 7 TeV. The radiation will be provided by a sequence of two separate magnets: a two-periods 5 T superconducting undulator and the beam separation dipole D3. After a short description of the profile monitor layout, the paper reviews the electromagnetic and mechanical design of the undulator, and reports on the fabrication and cold test results of a first half period prototype.Finally, for the LHC operation with lead ion beams,a proposal for a monitor sensitivity upgrade by using a 12 T. superconducting undulator is presented and discussed.
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| WEPKF006 |
Field Quality and Hysteresis of LHC Superconducting Corrector Magnets
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1600 |
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- A. Santrich Badal, M. Allitt, C. Giloux, M. Karppinen, A.M. Lombardi, V. Remondino, W. Venturini Delsolaro, R. Wolf
CERN, Geneva
- M. Bagre, P. Khare, T. Maurya, A. Puntambekar
CAT, Indore (M.P.)
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The Large Hadron Collider (LHC) will use some 6400 superconducting corrector magnets. There are 19 corrector types. These are assembled 14 different types of magnets of which 4 are nested. They are being manufactured by 4 firms in Europe and 3 in India. The magnetic field quality is measured at room temperature by 12 magnetic measurement benches employed by the corrector manufacturers. CERN performs magnetic measurement at 4.2K and at 1.9K on a small subset of corrector magnets. The paper discusses the correlation between the warm and cold field measurements. The field quality is compared to the magnet design expectations and to the target field quality for LHC. Many corrector circuits will be powered in a way which cannot be predicted before LHC will start operation and which even then may change between physics runs. The measured magnetic hysteresis and its influence on possible setting errors during operation is discussed, in particular for the orbit correctors and the tuning/trim quadrupole magnet circuits.
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