Ardalan Tajbakhsh - IEEE Xplore Author Profile

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Author details

Ardalan Tajbakhsh

Publications

2

Citations

3

Publications by Year

20242024

Co-Authors:

Lorenz T. BieglerAaron M. JohnsonJoseph NorbyYanhao Yang

Ardalan Tajbakhsh

Affiliation

Department of Mechanical Engineering

Carnegie Mellon University

Pittsburgh, PA, USA

Publication Topics

Model Predictive Control,
Path Planning,
Actuator Limits,
Adaptive Control,
Adaptive Model,
Adaptive Model Predictive Control,
Adaptive System,
Adaptor Complex,
Additional Complexity,
Additional Constraints,
Basin Of Attraction,
Behavioral Economics

Biography

Ardalan Tajbakhsh (Student Member, IEEE) received the B.S. degree (Hons.) in mechanical engineering from the University of Illinois, Urbana-Champaign, IL, USA, in 2018, and the M.S. degree in mechanical engineering with concentration in robotics in 2020 from Carnegie Mellon University, Pittsburgh, PA, USA, where he is currently working toward the Ph.D. degree in mechanical engineering.,His research interests include scalable motion planning and control for multiagent systems under uncertain real-world conditions.(Based on document published on 6 June 2024).

Publications

2

Citations

3

Publications by Year

20242024

Co-Authors:

Lorenz T. Biegler
Aaron M. Johnson
Joseph Norby
Yanhao Yang

Author's Published Works

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Showing 1-25 of 49 results

Conferences (49)

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Single Year
R. Assmann(38)
S. Redaelli(14)
F.J. Decker(9)
G. Robert-Demolaize(9)
J. Wenninger(9)
CERN, Geneva, Switzerland(27)
Stanford Linear Accelerator Center, University of Stanford, Stanford, CA, USA(8)
European Organization for Nuclear Research, Geneve, GenÃ¨ve, CH(2)
IHEP, Protvino, Russia(2)
DESY, Hamburg, Germany(2)
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)(11)
2007 IEEE Particle Accelerator Conference (PAC)(8)
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)(8)
Proceedings of the 2005 Particle Accelerator Conference(8)
Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366)(4)
IEEE(49)
Vancouver, BC, Canada(11)
Albuquerque, NM, USA(8)
Chicago, IL, USA(8)
Knoxville, TN, USA(8)
New York, NY, USA(4)
Beam Intensity(8)
Beam Size(7)
Beam Energy(6)
Large Hadron Collider(6)
Beta Function(5)

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Results

Operation of a seeded XUV free-electron laser at DESY with high-gain harmonic generation

Joern Boedewadt;Christoph Lechner;Ralph Assmann;Armin Azima;Markus Drescher;Nagitha Ekanayake;Bart Faatz;Kirsten Hacker;Mehdi Mohammad Kazemi;Ingmar Hartl;Shaukat Khan;Tim Laarmann;Theophilos Maltezopoulos;Tim Plath;Joerg Rossbach

2017 Conference on Lasers and Electro-Optics (CLEO)

Year: 2017 | Conference Paper |

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The XUV free electron laser FLASH, has been recently operated in the high-gain harmonic generation (HGHG) mode. We characterized the laser-induced energy modulation, as well as the temporal profile of the seeded FEL pulses. FEL saturation was reached for the 7th harmonic of the 266 nm seed laser.Show More

Operation of a seeded XUV free-electron laser at DESY with high-gain harmonic generation

Joern Boedewadt;Christoph Lechner;Ralph Assmann;Armin Azima;Markus Drescher;Nagitha Ekanayake;Bart Faatz;Kirsten Hacker;Mehdi Mohammad Kazemi;Ingmar Hartl;Shaukat Khan;Tim Laarmann;Theophilos Maltezopoulos;Tim Plath;Joerg Rossbach

2017 Conference on Lasers and Electro-Optics (CLEO)

Year: 2017 | Conference Paper |

Plasma acceleration with external injection at SINBAD

Julia Grebenyuk;Ralph Assmann;Ulrich Dorda;Barbara Marchetti

2014 20th International Workshop on Beam Dynamics and Optimization (BDO)

Year: 2014 | Conference Paper |

Cited by: Papers (5)

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SINBAD (Short INnovative Bunches and Accelerators at DESY) is a proposed dedicated accelerator research and development facility at DESY where amongst other topics laser-driven wakefield acceleration (LWFA) with external injection of ultra-short bunches will be exploited. At SINBAD we aim to demonstrate externally-injected bunch acceleration inside a plasma wake with minimal degradation of its ene...Show More

Plasma acceleration with external injection at SINBAD

Julia Grebenyuk;Ralph Assmann;Ulrich Dorda;Barbara Marchetti

2014 20th International Workshop on Beam Dynamics and Optimization (BDO)

Year: 2014 | Conference Paper |

Automatic Threshold Selection for BLM Signals during LHC Collimator Beam-Based Alignment

Gianluca Valentino;Ralph Assmann;Roderik Bruce;Stefano Redaelli;Nicholas Sammut

2012 Sixth UKSim/AMSS European Symposium on Computer Modeling and Simulation

Year: 2012 | Conference Paper |

Cited by: Papers (1)

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The Large Hadron Collider at CERN is the largest high-energy particle accelerator in the world. Proton beams are currently collided at an energy of 4 TeV per beam to investigate the fundamental elements of matter. The collider is equipped with a collimation system to ensure that potentially destructive halo particles are absorbed before they hit vulnerable elements. Beam-based alignment of the col...Show More

Automatic Threshold Selection for BLM Signals during LHC Collimator Beam-Based Alignment

Gianluca Valentino;Ralph Assmann;Roderik Bruce;Stefano Redaelli;Nicholas Sammut

2012 Sixth UKSim/AMSS European Symposium on Computer Modeling and Simulation

Year: 2012 | Conference Paper |

Classification of LHC beam loss spikes using Support Vector Machines

G. Valentino;R. W. Assmann;R. Bruce;N. Sammut

2012 IEEE 10th International Symposium on Applied Machine Intelligence and Informatics (SAMI)

Year: 2012 | Conference Paper |

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The CERN Large Hadron Collider's (LHC) collimation system is the most complex beam cleaning system ever designed. It requires frequent setups to determine the beam centres and beam sizes at the 86 collimator positions. A collimator jaw is aligned to the beam halo when a clear beam loss spike is detected on a Beam Loss Monitor (BLM) downstream of the collimator. This paper presents a technique for ...Show More

Classification of LHC beam loss spikes using Support Vector Machines

G. Valentino;R. W. Assmann;R. Bruce;N. Sammut

2012 IEEE 10th International Symposium on Applied Machine Intelligence and Informatics (SAMI)

Year: 2012 | Conference Paper |

Transverse impendance of LHC collimators

E. Metral;G. Arduini;R. Assmann;A. Boccardi;T. Bohl;F. Caspers;M. Gasior;O.R. Jones;K.K. Kasinski;T. Kroyer;S. Redaelli;G. Robert-Demolaize;G. Rumolo;R. Steinhagen;T. Weiler;F. Zimmermann;C. Bracco;B. Salvant;F. Roncarolo

2007 IEEE Particle Accelerator Conference (PAC)

Year: 2007 | Conference Paper |

Cited by: Papers (1)

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The transverse impedance in the LHC is expected to be dominated by the numerous collimators, most of which are made of Fibre-Reinforced-Carbon to withstand the impacts of high intensity proton beams in case of failures, and which will be moved very close to the beam, with full gaps of few millimetres, in order to protect surrounding super-conducting equipments. We present an estimate of the transv...Show More

Transverse impendance of LHC collimators

E. Metral;G. Arduini;R. Assmann;A. Boccardi;T. Bohl;F. Caspers;M. Gasior;O.R. Jones;K.K. Kasinski;T. Kroyer;S. Redaelli;G. Robert-Demolaize;G. Rumolo;R. Steinhagen;T. Weiler;F. Zimmermann;C. Bracco;B. Salvant;F. Roncarolo

2007 IEEE Particle Accelerator Conference (PAC)

Year: 2007 | Conference Paper |

LHC machine protection

R. Schmidt;R. Assmann;E. Carlier;B. Dehning;R. Denz;B. Goddard;E.B. Holzer;V. Kain;B. Puccio;B. Todd;J. Uythoven;J. Wenninger;M. Zerlauth

2007 IEEE Particle Accelerator Conference (PAC)

Year: 2007 | Conference Paper |

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For nominal beam parameters at 7 TeV/c each of the two LHC proton beams has a stored energy of 362 MJ threatening to damage accelerator equipment in case of uncontrolled beam loss. The energy stored in the magnet system at 7 TeV/c will exceed 10 GJ. In order to avoid damage of accelerator equipment, complex machine protection systems are required. Magnet protection and powering interlock systems m...Show More

LHC machine protection

R. Schmidt;R. Assmann;E. Carlier;B. Dehning;R. Denz;B. Goddard;E.B. Holzer;V. Kain;B. Puccio;B. Todd;J. Uythoven;J. Wenninger;M. Zerlauth

2007 IEEE Particle Accelerator Conference (PAC)

Year: 2007 | Conference Paper |

Performance reach of the "phase 1" LHC collimation system

G. Robert-Demolaize;R. Assmann;C. Bracco;S. Redaelli;T. Weiler

2007 IEEE Particle Accelerator Conference (PAC)

Year: 2007 | Conference Paper |

Cited by: Papers (5)

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State-of-the-art tracking tools have been developed for detailed LHC collimation and beam loss studies. This includes full chromatic treatment of both beam lines and error models. This paper reviews the main results on the performance reach of the multi-stage LHC collimation system that is being installed in the LHC. Limitations on the allowed proton loss rates and the stored intensity can be deri...Show More

Performance reach of the "phase 1" LHC collimation system

G. Robert-Demolaize;R. Assmann;C. Bracco;S. Redaelli;T. Weiler

2007 IEEE Particle Accelerator Conference (PAC)

Year: 2007 | Conference Paper |

LHC collimation system hardware commissioning

Th. Weiler;O. Aberle;R. Assmann;R. Chamizo;Y. Kadi;J. Lettry;R. Losito;S. Redaelli

2007 IEEE Particle Accelerator Conference (PAC)

Year: 2007 | Conference Paper |

Cited by: Papers (8)

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The stored energy and intensity of the LHC beam exceed the damage level of the machine and the quench level of the magnets by far. Therefore a robust and reliable collimation system is required which prevents the quenching of the magnets during regular operation and protects the accelerator components from damage in the event of beam loss. To assure that the installed collimators will protect the ...Show More

LHC collimation system hardware commissioning

Th. Weiler;O. Aberle;R. Assmann;R. Chamizo;Y. Kadi;J. Lettry;R. Losito;S. Redaelli

2007 IEEE Particle Accelerator Conference (PAC)

Year: 2007 | Conference Paper |

Beam loss response measurements with a LHC prototype collimator in the SPS

Th. Weiler;G. Arduini;R. Assmann;C. Bracco;H. Braun;B. Dehning;P. Gander;E. B. Holzer;M. Jonker;R. Losito;A. Masi;L. Ponce;S. Redaelli;G. Robert-Demolaize;M. Sobczak;J. Wenninger

2007 IEEE Particle Accelerator Conference (PAC)

Year: 2007 | Conference Paper |

Cited by: Papers (2)

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Beam tests with a large hadron collider (LHC) prototype collimator were performed at the super proton synchrotron (SPS) in autumn 2006. Applying a new collimator control system many new beam measurements were performed. This contribution presents results on collimator- induced beam loss measurements and their applications to beam-based alignment of collimators and measurements of the beam size and...Show More

Beam loss response measurements with a LHC prototype collimator in the SPS

Th. Weiler;G. Arduini;R. Assmann;C. Bracco;H. Braun;B. Dehning;P. Gander;E. B. Holzer;M. Jonker;R. Losito;A. Masi;L. Ponce;S. Redaelli;G. Robert-Demolaize;M. Sobczak;J. Wenninger

2007 IEEE Particle Accelerator Conference (PAC)

Year: 2007 | Conference Paper |

Scenarios for beam commissioning of the LHC collimation system

C. Bracco;R.W. Assmann;S. Redaelli;G. Robert-Demolaize

2007 IEEE Particle Accelerator Conference (PAC)

Year: 2007 | Conference Paper |

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A system of collimators has been designed to protect the superconducting LHC magnets against quench and damage from the high intensity proton beams. The considerable number of collimators and the resulting number of degrees of freedom for their set-up require a well prepared commissioning strategy. Efficiency studies for various implementations of the LHC collimation system have been performed, ta...Show More

Scenarios for beam commissioning of the LHC collimation system

C. Bracco;R.W. Assmann;S. Redaelli;G. Robert-Demolaize

2007 IEEE Particle Accelerator Conference (PAC)

Year: 2007 | Conference Paper |

The LHC collimator controls architecture - design and beam tests

S. Redaelli;R. Assmann;P. Gander;M. Jonker;M. Lamont;R. Losito;A. Masi;M. Sobczak

2007 IEEE Particle Accelerator Conference (PAC)

Year: 2007 | Conference Paper |

Cited by: Papers (3)

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The LHC collimation system will require simultaneous management by the LHC control system of more than 500 jaw positioning mechanisms in order to ensure the required beam cleaning and machine protection performance in all machine phases, from injection at 450 GeV to collision at 7 TeV. Each jaw positions a critical parameter for the machine safety. In this paper, the architecture of the LHC collim...Show More

The LHC collimator controls architecture - design and beam tests

S. Redaelli;R. Assmann;P. Gander;M. Jonker;M. Lamont;R. Losito;A. Masi;M. Sobczak

2007 IEEE Particle Accelerator Conference (PAC)

Year: 2007 | Conference Paper |

A concept for the lhc luminosity upgrade based on strong beta* reduction combined with a minimized geometrical luminosity loss factor

J-P. Koutchouk;R. Assmann;E. Metral;E. Todesco;F. Zimmermann;R. De Maria;G. Sterbini

2007 IEEE Particle Accelerator Conference (PAC)

Year: 2007 | Conference Paper |

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A significant reduction of beta* requires a new beam crossing scheme to overcome the consequence of the luminosity loss factor. We define in this paper the parameters of a possible solution taking advantage of an early separation scheme optionally supplemented by a weak crab crossing. Large aperture (150 mm) Nb3Sn triplet quadrupoles are chosen for their compactness, temperature margin and ability...Show More

A concept for the lhc luminosity upgrade based on strong beta* reduction combined with a minimized geometrical luminosity loss factor

J-P. Koutchouk;R. Assmann;E. Metral;E. Todesco;F. Zimmermann;R. De Maria;G. Sterbini

2007 IEEE Particle Accelerator Conference (PAC)

Year: 2007 | Conference Paper |

Energy Deposition Studies for the Betatron Cleaning Insertion (IR7) of LHC

M. Santana-Leitner;R. Assmann;A. Ferrari;M. Magistris;E. Tsoulou;V. Vlachoudis

Proceedings of the 2005 Particle Accelerator Conference

Year: 2005 | Conference Paper |

Cited by: Papers (2)

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Two insertions (IR3, IR7) of the Large Hadron Collider (LHC) are dedicated to beam cleaning with the design goals of absorbing part of the primary beam halo and of the secondary radiation. The tertiary halo which escapes the collimation system in IR7 may heat the cold magnets at unacceptable levels, if no additional absorber is used. In order to assess the energy deposition in sensitive components...Show More

Energy Deposition Studies for the Betatron Cleaning Insertion (IR7) of LHC

M. Santana-Leitner;R. Assmann;A. Ferrari;M. Magistris;E. Tsoulou;V. Vlachoudis

Proceedings of the 2005 Particle Accelerator Conference

Year: 2005 | Conference Paper |

Measurements of the LHC Collimator Impedance with Beam in the SPS

H. Burkhardt;G. Arduini;R. Assmann;F. Caspers;M. Gasior;A. Grudiev;R. Jones;T. Kroyer;E. Metral;S. Redaelli;G. Robert-Demolaize;F. Roncarolo;D. Schulte;R. Steinhagen;J. Wenninger;F. Zimmermann

Proceedings of the 2005 Particle Accelerator Conference

Year: 2005 | Conference Paper |

Cited by: Papers (1)

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The transverse impedance of the LHC collimators will likely dominate the overall transverse impedance in the LHC at high energies and potentially limit the maximum intensity. A prototype collimator was recently tested in the SPS. Small, but significant tune shifts depending on the collimator position have been observed using different independent high resolution tune measurement methods. In additi...Show More

Measurements of the LHC Collimator Impedance with Beam in the SPS

H. Burkhardt;G. Arduini;R. Assmann;F. Caspers;M. Gasior;A. Grudiev;R. Jones;T. Kroyer;E. Metral;S. Redaelli;G. Robert-Demolaize;F. Roncarolo;D. Schulte;R. Steinhagen;J. Wenninger;F. Zimmermann

Proceedings of the 2005 Particle Accelerator Conference

Year: 2005 | Conference Paper |

LHC Collimation: Design and Results from Prototyping and Beam Tests

R. Assmann;O. Aberle;G. Arduini;A. Bertarelli;H. Braun;M. Brugger;H. Burkhardt;S. Calatroni;F. Caspers;E. Chiaveri;A. Dallochio;B. Dehning;A. Ferrari;M. Gasior;A. Grudiev;E.B. Holzer;J.B. Jeanneret;J.M. Jimenez;Y. Kadi;R. Losito;M. Magistris;A. Masi;M. Mayer;E. Metral;R. Perret;C. Rathjen;S. Redaelli;G. Robert-Demolaize;S. Roesler;M. Santana;D. Schulte;P. Sievers;K. Tsoulou;H. Vincke;V. Vlachoudis;J. Wenninger;I. Baishev;I. Kurochkin;G. Spiezia

Proceedings of the 2005 Particle Accelerator Conference

Year: 2005 | Conference Paper |

Cited by: Papers (11)

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The problem of collimation and beam cleaning is one of the most challenging aspects of the LHC project. A collimation system must be designed, built, installed and commissioned with parameters that extend the present state-of-the-art by 2-3 orders of magnitude. Problems include robustness, cleaning efficiency, impedance and operational aspects. A strong design effort has been performed at CERN ove...Show More

LHC Collimation: Design and Results from Prototyping and Beam Tests

R. Assmann;O. Aberle;G. Arduini;A. Bertarelli;H. Braun;M. Brugger;H. Burkhardt;S. Calatroni;F. Caspers;E. Chiaveri;A. Dallochio;B. Dehning;A. Ferrari;M. Gasior;A. Grudiev;E.B. Holzer;J.B. Jeanneret;J.M. Jimenez;Y. Kadi;R. Losito;M. Magistris;A. Masi;M. Mayer;E. Metral;R. Perret;C. Rathjen;S. Redaelli;G. Robert-Demolaize;S. Roesler;M. Santana;D. Schulte;P. Sievers;K. Tsoulou;H. Vincke;V. Vlachoudis;J. Wenninger;I. Baishev;I. Kurochkin;G. Spiezia

Proceedings of the 2005 Particle Accelerator Conference

Year: 2005 | Conference Paper |

Detecting Impacts of Proton Beams on the LHC Collimators with Vibration and Sound Measurements

S. Redaelli;O. Aberle;R. Assmann;A. Masi;G. Spiezia

Proceedings of the 2005 Particle Accelerator Conference

Year: 2005 | Conference Paper |

Cited by: Papers (2)

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The 360 MJ stored energy of the 7 TeV LHC beams can seriously damage the beam line elements in case of accidental beam losses. Notably, the collimators will sit at 6 to 7 sigmas from the beam centre (1.2 to 1.4 mm) and will be hit and possibly damaged in case of failures, with a consequent degradation of the cleaning performance of the overall collimation system. The experience from operating mach...Show More

Detecting Impacts of Proton Beams on the LHC Collimators with Vibration and Sound Measurements

S. Redaelli;O. Aberle;R. Assmann;A. Masi;G. Spiezia

Proceedings of the 2005 Particle Accelerator Conference

Year: 2005 | Conference Paper |

Exploring A Nonlinear Collimation System for the LHC

J. Resta;A. Faus-Golfe;R. Assmann;S. Redaelli;G. Robert-Demolaize;D. Schulte;F. Zimmermann

Proceedings of the 2005 Particle Accelerator Conference

Year: 2005 | Conference Paper |

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We explore the adaptation of a nonlinear collimation system, as previously developed for linear colliders, to LHC betatron cleaning. A possible nonlinear system for LHC consists of a horizontal and vertical primary collimator located in between a pair of skew sextupoles. We discuss the modified LHC optics, the need for and optimum placement of secondary absorbers, and the simulated cleaning effici...Show More

Exploring A Nonlinear Collimation System for the LHC

J. Resta;A. Faus-Golfe;R. Assmann;S. Redaelli;G. Robert-Demolaize;D. Schulte;F. Zimmermann

Proceedings of the 2005 Particle Accelerator Conference

Year: 2005 | Conference Paper |

Mechanical Design for Robustness of the LHC Collimators

A. Bertarelli;O. Aberle;R.W. Assmann;S. Calatroni;A. Dallocchio;T. Kurtyka;M. Mayer;R. Perret;S. Redaelli;G. Robert-Demolaize

Proceedings of the 2005 Particle Accelerator Conference

Year: 2005 | Conference Paper |

Cited by: Papers (7)

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The functional specification of the LHC Collimators requires, for the start-up of the machine and the initial luminosity runs (Phase 1), a collimation system with maximum robustness against abnormal beam operating conditions. The most severe cases to be considered in the mechanical design are the asynchronous beam dump at 7TeV and the 450GeV injection error. To ensure that the collimator jaws surv...Show More

Mechanical Design for Robustness of the LHC Collimators

A. Bertarelli;O. Aberle;R.W. Assmann;S. Calatroni;A. Dallocchio;T. Kurtyka;M. Mayer;R. Perret;S. Redaelli;G. Robert-Demolaize

Proceedings of the 2005 Particle Accelerator Conference

Year: 2005 | Conference Paper |

Calculation of Residual Dose Rates and Intervention Scenarios for the LHC Beam Cleaning Insertions - Constraints and Optimization

O. Aberle;R. Assmann;M. Brugger;D. Forkel-Wirth;H.G. Menzel;S. Roesler;H. Vincke

Proceedings of the 2005 Particle Accelerator Conference

Year: 2005 | Conference Paper |

Cited by: Papers (1)

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Radiation protection of the personnel who will perform interventions in the CERN LHC Beam Cleaning Insertions is mandatory and includes the design of equipment and the establishment of work procedures. Residual dose rates due to activated equipment are expected to reach significant values such that any maintenance has to be planned and optimized in advance. Three-dimensional maps of dose equivalen...Show More

Calculation of Residual Dose Rates and Intervention Scenarios for the LHC Beam Cleaning Insertions - Constraints and Optimization

O. Aberle;R. Assmann;M. Brugger;D. Forkel-Wirth;H.G. Menzel;S. Roesler;H. Vincke

Proceedings of the 2005 Particle Accelerator Conference

Year: 2005 | Conference Paper |

A New Version of Sixtrack with Collimation and Aperture Interface

G. Robert-Demolaize;R. Assmann;S. Redaelli;F. Schmidt

Proceedings of the 2005 Particle Accelerator Conference

Year: 2005 | Conference Paper |

Cited by: Papers (12)

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Simulations of collimation and beam cleaning were so far often performed with simplified computer models. However, the increase in available CPU power has opened the possibility for far more realistic simulations. For large accelerators like LHC it is now possible to track millions of particles, element by element over hundreds of turns. The well established SixTrack code treats the full six-dimen...Show More

A New Version of Sixtrack with Collimation and Aperture Interface

G. Robert-Demolaize;R. Assmann;S. Redaelli;F. Schmidt

Proceedings of the 2005 Particle Accelerator Conference

Year: 2005 | Conference Paper |

Tools for predicting cleaning efficiency in the LHC

R. Assmann;M. Brugger;M. Hayes;J.B. Jeanneret;F. Schmidt;I. Baichev;D. KaItchev

Proceedings of the 2003 Particle Accelerator Conference

Year: 2003 | Conference Paper |

Cited by: Papers (2)

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The computer codes Sixtrack and Dimad have been upgraded to include realistic models of proton scattering in collimator jaws, mechanical aperture restrictions, and time-dependent fields. These new tools complement longexisting simplified linear tracking programs used up to now for tracking with collimators. Scattering routines from STRUCT and IC? have been compared with one another and the results...Show More

Tools for predicting cleaning efficiency in the LHC

R. Assmann;M. Brugger;M. Hayes;J.B. Jeanneret;F. Schmidt;I. Baichev;D. KaItchev

Proceedings of the 2003 Particle Accelerator Conference

Year: 2003 | Volume: 5 | Conference Paper |

Overview of the CLIC collimation design

R. Assmann;H. Burkhardt;S. Fartoukh;J.-B. Jeanneret;J. Pancin;S. Redaelli;T. Risselada;R. Zimmermann;H.J. Schreiber

PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)

Year: 2001 | Conference Paper |

Cited by: Papers (1)

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The collimation system of the Compact Linear Collider (CLIC) should simultaneously fulfill three different functions. It must (1) provide adequate halo collimation to render the detector background acceptable, (2) ensure collimator survival and machine protection against mis-steered beams, and (3) not significantly amplify incoming trajectory fluctuations via the collimator wake fields. We describ...Show More

Overview of the CLIC collimation design

R. Assmann;H. Burkhardt;S. Fartoukh;J.-B. Jeanneret;J. Pancin;S. Redaelli;T. Risselada;R. Zimmermann;H.J. Schreiber

PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)

Year: 2001 | Volume: 5 | Conference Paper |

Observation of spontaneous emitted X-ray betatron radiation in beam-plasma interactions

Shuoqin Wang;C.E. Clayton;B.E. Blue;E.S. Dodd;C.-K. Huang;K.A. Marsh;W.B. Mori;C. Joshi;S. Lee;P. Muggli;T. Katsouleas;F.J. Decker;M.J. Hogan;R.H. Iverson;P. Riamondi;D. Walz;R. Siemann;R. Assmann

PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)

Year: 2001 | Conference Paper |

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An experiment is being carried out at the Stanford Linear Accelerator Center (SLAC) to see if an ion channel can wiggle a beam of ultra-relativistic electrons to produce X-ray radiation. The goal is to create an intense source of undulator radiation using a plasma wiggler in the 1-10 keV range and also to determine the suitability of such an electrostatic wiggler to create a coherent beam of X-ray...Show More

Observation of spontaneous emitted X-ray betatron radiation in beam-plasma interactions

Shuoqin Wang;C.E. Clayton;B.E. Blue;E.S. Dodd;C.-K. Huang;K.A. Marsh;W.B. Mori;C. Joshi;S. Lee;P. Muggli;T. Katsouleas;F.J. Decker;M.J. Hogan;R.H. Iverson;P. Riamondi;D. Walz;R. Siemann;R. Assmann

PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)

Year: 2001 | Volume: 5 | Conference Paper |

Test of the electron hose instability in the E157 experiment

B. Blue;C.E. Clayton;E. Dodd;K. Marsh;W.B. Mori;S. Wang;C. Joshi;R. Assmann;F.-J. Decker;M.J. Hogan;R.H. Iverson;P. Raimondi;D. Walz;R.H. Siemann;S. Lee;P. Muggli;T. Katsouleas

PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)

Year: 2001 | Conference Paper |

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The E157 experiment is designed to demonstrate high gradient plasma wake field acceleration over a significant length. It has been suggested that the electron hose instability of the drive beam will degrade the performance of this experiment because the hosing tail electrons will not fully sample the highest acceleration field. In this paper a parasitic experiment designed to test the extent of th...Show More

Test of the electron hose instability in the E157 experiment

B. Blue;C.E. Clayton;E. Dodd;K. Marsh;W.B. Mori;S. Wang;C. Joshi;R. Assmann;F.-J. Decker;M.J. Hogan;R.H. Iverson;P. Raimondi;D. Walz;R.H. Siemann;S. Lee;P. Muggli;T. Katsouleas

PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)

Year: 2001 | Volume: 5 | Conference Paper |

The CLIC study of magnet stability and time-dependent luminosity performance

M. Aleksa;R. Assmann;W. Coosemans;G. Guignard;N. Leros;M. Mayoud;S. Redaelli;F. Ruggiero;S. Russenschuck;D. Schulte;I. Wilson;F. Zimmermann

PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)

Year: 2001 | Conference Paper |

Cited by: Papers (1)

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The present parameters of the CLIC study require the collision of small emittance beams with a vertical spot size of 1 nm. The tolerances on vertical quadrupole vibration (above a few Hz) are as small as a few nm in the linac and most of the Final Focus. The final focusing quadrupole has a stability requirement of 4 nm in the horizontal and 0.2 nm in the vertical direction. Those tolerances can on...Show More

The CLIC study of magnet stability and time-dependent luminosity performance

M. Aleksa;R. Assmann;W. Coosemans;G. Guignard;N. Leros;M. Mayoud;S. Redaelli;F. Ruggiero;S. Russenschuck;D. Schulte;I. Wilson;F. Zimmermann

PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)

Year: 2001 | Volume: 5 | Conference Paper |

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