Short Circuit Tests: First Step of LHC Hardware Commissioning Completion (2008)
Barbero-Soto, E, Bellesia, B, Bordry, Frederick, Casas Lino, M P, Coelingh, G J, Cumer, G, ...
For the two counter rotating beams in the Large Hadron Collider (LHC) about 8000 magnets (main dipole and quadrupole magnets, corrector magnets, separation dipoles, matching section quadrupoles etc.)...
Status of the Large Hadron Collider (LHC) (2008)
The installation of the LHC (Large Hadron Collider) at CERN is now completed. All magnets are interconnected. Five of the eight machine sectors are cold and filled with liquid helium. The remaining...
A Storage Ring based Option for the LHeC (2008)
Willeke, F, Bordry, Frederick, Braun, H H, Brüning, Oliver Simon, Burkhardt, H, Chattopadhyay, S, ...
The LHeC aims at the generation of hadron-lepton collisions with center of mass energies in the TeV scale and luminosities of the order of $10^{32}-10^{33} cm^{-2} sec^{-1}$ by taking advantage of...
Linac-LHC EP Collider Options (2008)
Zimmermann, F, Aksahal, H, Bordry, Frederick, Braun, H H, Brüning, Oliver Simon, Çiftçi, A K, ...
We describe various parameter scenarios for a ring-linac ep collider based on LHC and an independent electron linac. Luminosities between $10^{31}$ and $10^{33} cm^{-2}s^{-1}$ can be achieved with a...
Performance of the Main Dipole Magnet Circuits of the LHC during Commissioning (2008)
Verweij, A, Baggiolini, V, Ballarino, A, Bellesia, B, Bordry, Frederick, Cantone, A, ...
During hardware commissioning of the Large Hadron Collider (LHC), 8 main dipole circuits are tested at 1.9 K and up to their nominal current. Each dipole circuit contains 154 magnets of 15 m length,...
Venturini-Delsolaro, W, Baggiolini, V, Ballarino, A, Bellesia, B, Bordry, Frederick, Cantone, A, ...
The LHC is a complex machine requiring more than 7400 superconducting corrector magnets distributed along a circumference of 26.7 km. These magnets are powered in 1446 different electrical circuits...
Magnetic Field Tracking Experiments for LHC (2004)
Granata, V, Billan, J, Bordry, Frederick, Bottura, L, Coutinho-Ferreira, P M, Effinger, E, ...
At the Large Hadron Collider (LHC) at CERN one of the difficult requirements during the energy ramp is that the ratio between the field produced by the quadrupoles and the field in the dipoles...
Technological challenges for the LHC (2003)
Brüning, Oliver Simon, Rossi, Lucio, Lebrun, Philippe, Bordry, Frederick, Mess, Karl Hubert, Schmidt, Rüdiger
For the LHC to provide particle physics with proton-proton collisions at the centre of mass energy of 14 TeV with a luminosity of 1034 cm-2s-1, the machine will operate with high-field dipole magnets...
First Results and Status of the LHC Test String 2 (2002)
Saban, R I, Ballarino, A, Blanco-Viñuela, E, Bordry, Frederick, Bottura, L, Bozzini, D, ...
After the commissioning of String 2 Phase1 and the powering of the main circuits in autumn 2001, a short yet vigorous experimental program was carried-out to validate the final design choices for the...
First Powering of the LHC Test String 2 (2002)
Saban, R I, Bordry, Frederick, Bozzini, D, Dahlerup-Petersen, K, Denz, R, Puccio, B, ...
String 2 is a full-size model of a regular cell in an LHC arc. In the first phase, three dipole magnets and two quadrupole magnets have been assembled in String 2 and commissioning started in April...
The energy calibration of LEP in 1992 (2002)
Arnaudon, L, Assmann, R W, Billan, J, Birr, W, Blondel, A, Bobbink, Gerjan J, ...
Machine Protection for the LHC: Architecture of the Beam and Powering Interlock Systems (2001)
Bordry, Frederick, Denz, R, Mess, K H, Puccio, B, Rodríguez-Mateos, F, Schmidt, R
The superconducting Large Hadron Collider under construction at CERN is an accelerator with unprecedented complexity. Its operation requires a large variety of instrumentation, not only for control...
The Commissioning of the LHC Test String 2 (2001)
Bordry, Frederick, Bozzini, D, Casas-Cubillos, J, Cruikshank, P, Dahlerup-Petersen, K, Denz, R, ...
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...
LHC Inner Triplet Powering Strategy (2001)
In order to achieve a luminosity in excess of 10**34 cm**-2s**-1 at the Large Hadron Collider (LHC), special high gradient quadrupoles are required for the final focusing triplets. These low-b...
LEP Optics Measurements (2000)
Bordry, Frederick, Koutchouk, Jean-Pierre, Piwinski, A, Von Holtey, G
High Precision and High Frequency Four-Quadrant Power Converter [+-600A,+-12V] (1999)
Bordry, Frederick, Cussac, P, Dupaquier, A
The LHC (Large Hadron Collider) particle accelerator makes extensive use of true bipolar power converters. All these converters will be installed in excavated caverns underground; hence the necessity...
Novel Topology for Four-Quadrant Converter (1999)
Bordry, Frederick, Burnet, Jean Paul, Coulibaly, P, Dupaquier, A, Iturriz, F, Meynard, T
Particle accelerators, like the LHC (Large Hadron Collider), make use of true bipolar power converters to feed superconducting magnets. Moreover, the LHC imposes that most converters must be...
Four Quadrant Convertor [600A, 12V] Prototype for LHC (1999)
Kniegl, G, Weber, R, Bordry, Frederick, Dupaquier, A
The CERN Large Hadron Collider (LHC) project will make extensive use of true bipolar power converters [±600 A, ±12 V]. The need to install the power converters in excavated caverns underground...
The LHC Magnet String Programme: Status and Future Plans (1999)
Bordry, Frederick, Casas-Cubillos, J, Cruikshank, P, Dahlerup-Petersen, K, Rodríguez-Mateos, F, Proudlock, Paul, ...
Full Range ZVS Phase Shifted Power Converter with "Poles" (1999)
Bordry, Frederick, Dupaquier, A
The study and development of a quasi-resonant power converter, with Full Bridge - PhaseShifted - Pulse Width Modulation (FB-PS-PWM) topology is presented. The originality of thepaper is the adding of...
RST Digital Algorithm for Controlling the LHC Magnet Current (1999)
The LHC will require a very high precision (a few ppm) in the control of the current (13 kA) inthe main superconducting magnets. To achieve this challenging performance, severaldevelopments are made...
High-current performance evaluation of DCCTs (1999)
Bordry, Frederick, Fernqvist, G, Halvarsson, Bjorn, Perréard, J C, Pett, John G
The evaluation of high performance DCCT's to the ppm level has never been an easy task. With the LHC demanding currents up to 13 kA, a whole series of problems has arisen in the accurate measurement...
Novel Topology for (plus minus 600 A,plus minus 12 V) four-Quadrant Converter (1999)
Bordry, Frederick, Dupaquier, A, Coulibaly, P, Meynard, T
The LHC machine makes extensive use of true bipolar power converters. All these converters will be installed underground; this installation leads to the necessity for reduced volume and high...
High Current, Low Voltage Power Converter [20kA, 6V]: LHC Converter Prototype (1998)
Jørgensen, H E, Bordry, Frederick, Dupaquier, A, Fernqvist, G
The superconducting LHC accelerator requires high currents (~12.5kA) and relatively low voltages (~10 V) for its magnets. The need to install the power converters underground is the driving force for...
The LHC Prototype Full-Cell: Design Study (1998)
Bordry, Frederick, Brunet, J C, Casas-Cubillos, J, Cruikshank, P, Dahlerup-Petersen, K, Delruelle, N, ...
As a continuation of the experimental program carried-out with String 1, project management decided toward the end of 1995 to construct an LHC prototype Full-Cell, also known as String 2. The present...
Dynamic Effects and their Control at the LHC (1997)
Bailey, R, Bordry, Frederick, Bottura, L, Burla, P, Collier, Paul, Henrichsen, K N, ...
Tune, chromaticity and orbit of the LHC beams have to be precisely controlled by synchronising the magnetic field of quadrupole, sextupole and corrector magnets.This is a challenging task for an...
High Current, Low Voltage Power Converters for LHC Present Development Directions (1996)
Bordry, Frederick, Dupaquier, A
The superconducting LHC accelerator requires high currents (12.5 kA) and relatively low voltage (~10 V) for its magnets. The need to install the power converters underground is the driving force for...
LEP1 operation, 1989-1995 (1996)
Arduini, Gianluigi, Bailey, R, Bohl, T, Bordry, Frederick, Burkhardt, H, Cornelis, C, ...
In October 1995, the last run foreseen for dedicated Z production at CERN was performed in LEP, thereby bringing to a close the first phase of operation of the machine. A total luminosity of 200 pb-1...
The energy calibration of LEP in the 1993 scan (1995)
Assmann, R W, Beuret, A, Blondel, A, Billan, J, Billen, R, Bobbink, Gerjan J, ...
Report of the task force on the study of SL activities (1994)
Bordry, Frederick, Charrue, P, Collier, Paul, Elsener, K, Mertens, V, Schmickler, Hermann
LEP accelerator logging system using on-line database (1993)
Billen, R, Bordry, Frederick, Delamare, C, Hatziangeli, Eugenia, Roeber, F
LEP operation in 1992 with a 90$^0$ optics (1993)
Bailey, R, Bohl, T, Bordry, Frederick, Burkhardt, H, Cornelis, Karel, Collier, Paul, ...
Effects of tidal forces on the beam energy in LEP (1993)
Arnaudon, L, Bordry, Frederick, Coosemans, Williame, Dehning, Bernd, Henrichsen, K N, Hofmann, A, ...
Measurement of the mass of the Z boson and the energy calibration of LEP (1993)
Arnaudon, L, Assmann, R W, Billan, J, Birr, W, Blondel, A, Bobbink, Gerjan J, ...
The energy calibration of LEP in 1991 (1992)
Arnaudon, L, Assmann, R W, Billan, J, Birr, W, Blondel, A, Bobbink, Gerjan J, ...
CERN's accelerator description using databases (1992)
Albrecht, Andreas, Billen, R, Bordry, Frederick, Marti, Y, Poole, John
Three years operational experience with LEP (1992)
Bailey, R, Bohl, T, Bordry, Frederick, Burkhardt, H, Cornelis, Karel, Collier, Paul, ...
First two years operational experience with LEP (1991)
Bailey, R, Bohl, T, Bordry, Frederick, Burkhardt, H, Cornelis, Karel, Collier, Paul, ...
First operational experiences with LEP (1990)
Bailey, R, Bohl, T, Bordry, Frederick, Collier, Paul, Cornelis, Karel, Desforges, D, ...
Synchro-betatron resonances in LEP (1990)
Bohl, T, Bordry, Frederick, Collier, Paul, Cornelis, Karel, Evans, Lyndon R, Faugier, A, ...