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2001_PAC
14 items
last update: 07 Nov 2001, 00:00 		Subscribe to basket
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1.
Vacuum Calculations for the LHC Experimental Beam Chambers / Collins, I ; Knaster, J R (CERN) ; Lepeule, P ; Rossi, A ; Veness, R J M
The vacuum stability is studied for the LHC experimental beam vacuum chambers of ALICE, ATLAS, and CMS. The present baseline design includes sputtered Non-Evaporable Getter (NEG) coating over the whole chamber inner surface providing distributed pumping and an antimultipactor coating. [...]
LHC-Project-Report-492; CERN-LHC-Project-Report-492.- Geneva : CERN, 2001 - 4 p. Fulltext: PDF; IEEE Published version, local copy: PDF;
In : 19th IEEE Particle Accelerator Conference, Chicago, IL, USA, 18 - 22 Jun 2001, pp.e-proc. 3153 - Please contact the library if you need to access this document.
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2.
Design Aspects of the RF Contacts for the LHC Beam Vacuum Interconnects / Calatroni, Sergio ; Caspers, Friedhelm ; Couturier, K ; Hilleret, Noël (CERN) ; Knaster, J R (CERN) ; Lepeule, P ; Taborelli, M ; Veness, R J M ; Vos, L
The LHC requires a very low longitudinal and transverse beam coupling impedance, in particular at low frequencies. This implies an admissible DC contact resistance of less than 0.1 m$\Omega$ for the RF contacts inside the vacuum bellows which must carry the image current (up to 50 A peak) of the beam at each vacuum chamber interconnect [...]
LHC-Project-Report-491; CERN-LHC-Project-Report-491.- Geneva : CERN, 2001 - 4 p. Fulltext: PDF; IEEE Published version, local copy: PDF;
In : 19th IEEE Particle Accelerator Conference, Chicago, IL, USA, 18 - 22 Jun 2001, pp.e-proc. 2168 - Please contact the library if you need to access this document.
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3.
The SPS as a Vacuum Test Bench for the Electron Cloud Studies with LHC Type Beams / Arduini, Gianluigi ; Jiménez, J M ; Weiss, K
The SPS machine has been operating with LHC-type beams with bunch intensities up to 8x1010 protons (70% of LHC nominal intensity). This paper will give evidence of the electron cloud phenomenon as the mechanism responsible for the pressure rises in the SPS in presence of LHC type beams. [...]
LHC-Project-Report-490; CERN-LHC-Project-Report-490.- Geneva : CERN, 2001 - 4 p. Fulltext: PDF; IEEE Published version, local copy: PDF;
In : 19th IEEE Particle Accelerator Conference, Chicago, IL, USA, 18 - 22 Jun 2001, pp.e-proc. 685 - Please contact the library if you need to access this document.
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4.
Currents in, Forces on and Deformations/Displacements of the LHC Beam Screen Expected during a Magnet Quench / Caspers, Friedhelm ; Pugnat, P ; Rathjen, C ; Russenschuck, Stephan ; Siemko, A
Due to the field asymmetry of the LHC dipoles, the magnetic field integral calculated from the centre of the aperture to the outside of the cold mass does not vanish. During a magnet quench this asymmetry generates an electromotive force and thus a current with a resultant lateral force on the beam screen. [...]
LHC-Project-Report-489; CERN-LHC-Project-Report-489.- Geneva : CERN, 2001 - 4 p. Fulltext: PDF; IEEE Published version, local copy: PDF;
In : 19th IEEE Particle Accelerator Conference, Chicago, IL, USA, 18 - 22 Jun 2001, pp.e-proc. 192 - Please contact the library if you need to access this document.
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5.
Performance of Prototypes and Start up of Series Fabrication of the LHC Arc Quadrupoles / Billan, J ; Peyrot, M ; Remondino, Vittorio ; Rifflet, J M ; Siemko, A ; Simon, F ; Smirnov, N ; Tortschanoff, Theodor
The construction of three prototype arc quadrupoles for the LHC machine has been concluded successfully. These magnets underwent warm and cold magnetic measurements as well as many other tests, both in CEA-Saclay's laboratory and at CERN. [...]
LHC-Project-Report-488; CERN-LHC-Project-Report-488.- Geneva : CERN, 2001 - 4 p. Fulltext: PDF; IEEE Published version, local copy: PDF;
In : 19th IEEE Particle Accelerator Conference, Chicago, IL, USA, 18 - 22 Jun 2001, pp.e-proc. 3430 - Please contact the library if you need to access this document.
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6.
Final Prototypes, First Pre-series Units and Steps Towards Series Production of the LHC Main Dipoles / Modena, M ; Bajko, M ; Bottura, L ; Buzio, M ; Fessia, P ; Pagano, O ; Perini, D ; Pugnat, P ; Sanfilippo, S ; Savary, F et al.
The LHC, a 7 TeV proton collider presently under construction at CERN, requires 1232 superconducting dipole magnets, featuring a nominal field of 8.33 T inside a cold bore tube of 50 mm inner diameter and a magnetic length of 14.3 m. This paper summarises the results of the program of the six LHC main dipole final prototypes and presents the performance measurements of the first magnets of the 90 pre-series units currently under manufacture by industry. [...]
LHC-Project-Report-487; CERN-LHC-Project-Report-487.- Geneva : CERN, 2001 - 4 p. Fulltext: PDF; IEEE Published version, local copy: PDF;
In : 19th IEEE Particle Accelerator Conference, Chicago, IL, USA, 18 - 22 Jun 2001, pp.e-proc. 186 - Please contact the library if you need to access this document.
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7.
Geometric and Magnetic Axes of the LHC Dipole / Bajko, M ; Billan, J ; Buzio, M ; Deferne, G ; Ferracin, P ; García-Pérez, J ; Scandale, Walter ; Todesco, Ezio
The 15-m long superconducting dipoles of the Large Hadron Collider (LHC) with two-in-one design are curved by about 5 mrad to follow the beam trajectory. They are supported on three cold feet to minimise the vertical sagitta induced by their 35 tonnes weight. [...]
LHC-Project-Report-486; CERN-LHC-Project-Report-486.- Geneva : CERN, 2001 - 4 p. Fulltext: PDF; IEEE Published version, local copy: PDF;
In : 19th IEEE Particle Accelerator Conference, Chicago, IL, USA, 18 - 22 Jun 2001, pp.e-proc. 3392 - Please contact the library if you need to access this document.
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8.
Quench Heater Studies for the LHC Magnets / Rodríguez-Mateos, F ; Sonnemann, F
About 2000 LHC (CERN's Large Hadron Collider) superconducting magnets will be protected with quench heaters against development of excessive voltage and overheating after a resistive transition. The quench heater strips are powered by capacitor bank discharge power supplies. [...]
LHC-Project-Report-485; CERN-LHC-Project-Report-485.- Geneva : CERN, 2001 - 4 p. Fulltext: PDF; IEEE Published version, local copy: PDF;
In : 19th IEEE Particle Accelerator Conference, Chicago, IL, USA, 18 - 22 Jun 2001, pp.e-proc. 3451 - Please contact the library if you need to access this document.
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9.
Energy Extraction for the LHC Superconducting Circuits / Dahlerup-Petersen, K ; Rodríguez-Mateos, F ; Schmidt, R ; Sonnemann, F
The superconducting magnets of the LHC will be powered in about 1700 electrical circuits. The energy stored in circuits, up to 1.3 GJ, can potentially cause severe damage of magnets, bus bars and current leads. [...]
LHC-Project-Report-484; CERN-LHC-Project-Report-484.- Geneva : CERN, 2001 - 4 p. Fulltext: PDF; IEEE Published version, local copy: PDF;
In : 19th IEEE Particle Accelerator Conference, Chicago, IL, USA, 18 - 22 Jun 2001, pp.e-proc. 3448 - Please contact the library if you need to access this document.
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10.
Status and Challenges of the LHC Construction / Ostojic, R
The LHC is designed to provide proton beams of 7 TeV and nominal luminosity of 10**34 cm**-2s**-1. This objective is achieved at an affordable cost by pushing all major collider components to the limits of technology, by upgrading the existing CERN accelerators and infrastructure, and by involving the technical expertise, resources and dedication of accelerator laboratories world-wide. [...]
LHC-Project-Report-483; CERN-LHC-Project-Report-483.- Geneva : CERN, 2001 - 6 p. Fulltext: PDF; IEEE Published version, local copy: PDF;
In : 19th IEEE Particle Accelerator Conference, Chicago, IL, USA, 18 - 22 Jun 2001, pp.e-proc. 16 - Please contact the library if you need to access this document.
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11.
Detection of Resistive Transitions in LHC Superconducting Components / Denz, R ; Rodríguez-Mateos, F
The LHC has entered the construction phase. It will incorporate a large number of superconducting components like magnets, current leads and busbars. [...]
LHC-Project-Report-482; CERN-LHC-Project-Report-482.- Geneva : CERN, 2001 - 4 p. Fulltext: PDF; IEEE Published version, local copy: PDF;
In : 19th IEEE Particle Accelerator Conference, Chicago, IL, USA, 18 - 22 Jun 2001, pp.e-proc. 3445 - Please contact the library if you need to access this document.
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12.
The Interconnections of the LHC Cryomagnets / Jacquemod, A ; Poncet, Alain ; Skoczen, Blazej ; Tock, J P
The main components of the LHC, the next world-class facility in high-energy physics, are the twin-aperture high-field superconducting cryomagnets to be installed in the existing 26.7-km long tunnel. After installation and alignment, the cryomagnets have to be interconnected. [...]
LHC-Project-Report-481; CERN-LHC-Project-Report-481.- Geneva : CERN, 2001 - 4 p. Fulltext: PDF; IEEE Published version, local copy: PDF;
In : 19th IEEE Particle Accelerator Conference, Chicago, IL, USA, 18 - 22 Jun 2001, pp.e-proc. 616 - Please contact the library if you need to access this document.
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13.
The Commissioning of the LHC Test String 2 / Bordry, Frederick ; Bozzini, D ; Casas-Cubillos, J ; Cruikshank, P ; Dahlerup-Petersen, K ; Denz, R ; Herzog, R ; Puccio, B ; Rodríguez-Mateos, F ; Saban, R I et al.
String 2 [1,2] is a full-size model of an LHC cell of the regular part of the arc. It is composed of six dipole magnets with their correctors, two short straight sections with their orbit and lattice corrector magnets, and a cryogenic distribution line running alongside the magnets. [...]
LHC-Project-Report-480; CERN-LHC-Project-Report-480.- Geneva : CERN, 2001 - 4 p. Fulltext: PDF; IEEE Published version, local copy: PDF;
In : 19th IEEE Particle Accelerator Conference, Chicago, IL, USA, 18 - 22 Jun 2001, pp.e-proc. 189 - Please contact the library if you need to access this document.
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14.
The Preparation of the Cryomagnets and the Assembly of the LHC Test String 2 / Andujar, O ; Bozzini, D ; Calzas-Rodriguez, C ; Cruikshank, P ; Desebe, O ; Dobers, T ; Jacquemod, A ; Kos, N ; Lepeule, P ; Maan, W et al.
The numerous complex activities required to prepare the cryomagnets for the installation in String 2 are described. These include the configuration of the mechanical interfaces, thee conditioning of the beam tubes, the installation of beam screens and the instrumentation as well as the final checks. [...]
LHC-Project-Report-479; CERN-LHC-Project-Report-479.- Geneva : CERN, 2001 - 4 p. Fulltext: PDF; IEEE Published version, local copy: PDF;
In : 19th IEEE Particle Accelerator Conference, Chicago, IL, USA, 18 - 22 Jun 2001, pp.e-proc. 3433 - Please contact the library if you need to access this document.
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