Z. Valdez-Nava - IEEE Xplore Author Profile

Scheduled Maintenance on Monday 1/13/2025

Single article sales and account management will be unavailable from 5:00 AM - 7:00 PM ET (09:00 - 23:00 UTC). We apologize for the inconvenience.

IEEE.org
IEEE Xplore
IEEE SA
IEEE Spectrum
More Sites

- Donate
- Personal Sign In

Access provided by:

MIT Libraries

Access provided by:

MIT Libraries

ADVANCED SEARCH

Author details

Z. Valdez-Nava

Also published under: Zarel Valdez-Nava

Publications

27

Citations

131

Publications by Year

20112022

Co-Authors:

C. AbadieS. AgnelStéphane AzzopardiG. BelijarPierre Bidan

Show All Co-Authors (51)

Z. Valdez-Nava

Also published under: Zarel Valdez-Nava

Affiliation

LAPLACE (Laboratoire Plasma et Conversion d’Énergie

Université de Toulouse

CNRS; Bat 3R3, 118 route de Narbonne, Toulouse cedex 9, France

Publication Topics

Field Grading,
Filler Content,
Functionally Graded Materials,
High Voltage,
Partial Discharge,
Particle Concentration,
Dielectric Properties,
Graded Materials,
High Permittivity,
High-voltage Electrode,
Layer Of Particles,
Power Electronics

Biography

Zarel Valdez-Nava (M'16) received his PhD in materials science in 2005 jointly from the University of Toulouse, France and the Autonomous University of Nuevo Leon, Mexico. In 2008, he joined LAPLACE as researcher of the French National Scientific Research Center (CNRS). His research work deals with insulating and dielectric materials for high voltage and/or for high temperature power electronics. His interests concern the relationship between the processing of composite and ceramic materials in regards to their performance in real electrical engineering applications. He has co-authored over 30 papers in international scientific journals.(Based on document published on 15 April 2021).

Publications

27

Citations

131

Publications by Year

20112022

Co-Authors:

C. Abadie
S. Agnel
Stéphane Azzopardi
G. Belijar
Pierre Bidan

Show All Co-Authors (51)

Author's Published Works

Search History

Showing 1-18 of 18 results

Conferences (14)

Journals (4)

Sort

Filter Results

Show

Subscribed Content

Open Access Only

Range
Single Year
N. Catalan-Lasheras(15)
J. Wei(5)
H. Ludewig(5)
N. Simos(4)
D. Raparia(4)
Brockhaven National Laboratory, Upton, NY, USA(7)
CERN, Geneva, Switzerland(5)
Accelerator Technology Division, CERN, Geneva, Switzerland(2)
BNL, Upton, NY, USA(2)
LANL, USA(2)
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)(9)
IEEE Transactions on Applied Superconductivity(4)
Proceedings of the 2003 Particle Accelerator Conference(4)
2007 IEEE Particle Accelerator Conference (PAC)(1)
IEEE(18)
Chicago, IL, USA(9)
Portland, OR, USA(4)
Albuquerque, NM, USA(1)
Proton Beam(7)
Straight Section(7)
Department Of Energy(5)
Neutron Source(4)
Quadrupole(4)

Select All on Page

Sort By

Results

Quench Performance of the LHC Insertion Magnets

Nuria Catalan Lasheras;Walter Venturini Delsolaro;Andrzej Siemko;Ranko Ostojic;Glyn Kirby

IEEE Transactions on Applied Superconductivity

Year: 2009 | Volume: 19, Issue: 3 | Journal Article |

HTML

After final installation in the LHC tunnel, the MQM and MQY quadrupole magnets of the LHC insertions are now being commissioned to their nominal currents. These two types of magnets operate at 1.9 K and 4.5 K and with nominal currents ranging from 3600 A to 5390 A. From the very first acceptance tests of the bare magnets coming from the manufacturers, they have been powered using different cycles,...Show More

Quench Performance of the LHC Insertion Magnets

Nuria Catalan Lasheras;Walter Venturini Delsolaro;Andrzej Siemko;Ranko Ostojic;Glyn Kirby

IEEE Transactions on Applied Superconductivity

Year: 2009 | Volume: 19, Issue: 3 | Journal Article |

Magnetic Performance of the Main Superconducting Magnets for the LHC

S. Sanfilippo;N. Sammut;L. Bottura;M. Di-Castro;A. Basu;J.-P. Koutchouk;E. Todesco;P. Hagen;N. Catalan-Lasheras;W. Venturini-Delsolaro;C. Giloux;R. Wolf

IEEE Transactions on Applied Superconductivity

Year: 2008 | Volume: 18, Issue: 2 | Journal Article |

Cited by: Papers (4)

HTML

The field strength and homogeneity of all the LHC superconducting magnets were measured as a part of the production control and qualification process that has taken place during the past four years. In addition to field measurements at room temperature performed on the integral of the production, a significant part of the magnets has been subjected to extensive magnetic measurements at cold. The m...Show More

Magnetic Performance of the Main Superconducting Magnets for the LHC

S. Sanfilippo;N. Sammut;L. Bottura;M. Di-Castro;A. Basu;J.-P. Koutchouk;E. Todesco;P. Hagen;N. Catalan-Lasheras;W. Venturini-Delsolaro;C. Giloux;R. Wolf

IEEE Transactions on Applied Superconductivity

Year: 2008 | Volume: 18, Issue: 2 | Journal Article |

Magnet acceptance and allocation at the LHC magnet evaluation board

P. Bestmann;L. Bottura;N. Catalan-Lasheras;S. Fartoukh;S. Gilardoni;M. Giovannozzi;J.-B. Jeanneret;M. Karppinen;A. Lombardi;K.-H. Mess;D. Missiaen;M. Modena;R. Ostojic;Y. Papaphilippou;P. Pugnat;S. Ramberger;S. Sanfilippo;W. Scandale;F. Schmidt;N. Siegel;A. Siemko;T. Tortschanoff;D. Tommasini;E. Wildner

2007 IEEE Particle Accelerator Conference (PAC)

Year: 2007 | Conference Paper |

Cited by: Papers (5)

HTML

The normal and superconducting magnets for the LHC ring have been carefully examined to insure that each of about 1900 assemblies is suitable for the operation in the accelerator. Hardware experts and accelerator physicists have contributed to this work that consisted in magnet acceptance, and sorting according to geometry, field quality and quench level. This paper gives a description of the magn...Show More

Magnet acceptance and allocation at the LHC magnet evaluation board

P. Bestmann;L. Bottura;N. Catalan-Lasheras;S. Fartoukh;S. Gilardoni;M. Giovannozzi;J.-B. Jeanneret;M. Karppinen;A. Lombardi;K.-H. Mess;D. Missiaen;M. Modena;R. Ostojic;Y. Papaphilippou;P. Pugnat;S. Ramberger;S. Sanfilippo;W. Scandale;F. Schmidt;N. Siegel;A. Siemko;T. Tortschanoff;D. Tommasini;E. Wildner

2007 IEEE Particle Accelerator Conference (PAC)

Year: 2007 | Conference Paper |

Construction and qualification of the pre-series MQM superconducting quadrupoles for the LHC insertions

R. Ostojic;N. Catalan Lasheras;J. Lucas;W. Venturini Delsolaro;D. Landgrebe

IEEE Transactions on Applied Superconductivity

Year: 2004 | Volume: 14, Issue: 2 | Journal Article |

Cited by: Papers (5)

HTML

The LHC insertions will be equipped with individually powered MQM superconducting quadrupoles, produced in three versions with magnetic lengths of 2.4 m, 3.4 m, and 4.8 m. The quadrupoles feature a 56 mm aperture coil, designed on the basis of an 8.8 mm wide Rutherford-type NbTi cable for a nominal gradient of 200 T/m at 1.9 K and 5390 A. A total of 96 quadrupoles are in production in Tesla Engine...Show More

Construction and qualification of the pre-series MQM superconducting quadrupoles for the LHC insertions

R. Ostojic;N. Catalan Lasheras;J. Lucas;W. Venturini Delsolaro;D. Landgrebe

IEEE Transactions on Applied Superconductivity

Year: 2004 | Volume: 14, Issue: 2 | Journal Article |

Fabrication of the pre-series wide aperture superconducting quadrupoles for the LHC insertions

G.A. Kirby;N. Catalan Lasheras;R. Ostojic;R. Burgmer;M. Jordan;D. Krischel;P. Schmidt

IEEE Transactions on Applied Superconductivity

Year: 2004 | Volume: 14, Issue: 2 | Journal Article |

Cited by: Papers (4)

HTML

Individually powered superconducting quadrupoles with a coil bore of 70 mm will be installed in the LHC insertions, in areas where increased geometrical acceptance and improved field quality are required. The quadrupoles feature a four-layer coil, designed on the basis of two graded 8.3 mm wide Rutherford-type NbTi cables. The magnets have a magnetic length of 3.4 m and a nominal gradient of 160 T...Show More

Fabrication of the pre-series wide aperture superconducting quadrupoles for the LHC insertions

G.A. Kirby;N. Catalan Lasheras;R. Ostojic;R. Burgmer;M. Jordan;D. Krischel;P. Schmidt

IEEE Transactions on Applied Superconductivity

Year: 2004 | Volume: 14, Issue: 2 | Journal Article |

Mechanical design of a ferrite-based injection kicker for SNS accumulator ring

C. Pai;N. Catalan-Lasheras;W. Eng;H. Hseuh;Y. Lee;R. Lambiase;W. Meng;J. Sandberg;S. Tepikian;J. Tuozzolo

Proceedings of the 2003 Particle Accelerator Conference

Year: 2003 | Conference Paper |

Cited by: Papers (1)

HTML

Two sets of kickers, 4 pulsed dipoles in each set, will be used in the SNS accumulator ring to create a dynamic orbit bump for injection process. These kickers are designed as large aperture, window frame magnets. The design of these 8 kickers has been completed. The first article kicker has been assembled and is being tested. In this paper we discuss the mechanical design criteria for these kicke...Show More

Mechanical design of a ferrite-based injection kicker for SNS accumulator ring

C. Pai;N. Catalan-Lasheras;W. Eng;H. Hseuh;Y. Lee;R. Lambiase;W. Meng;J. Sandberg;S. Tepikian;J. Tuozzolo

Proceedings of the 2003 Particle Accelerator Conference

Year: 2003 | Volume: 3 | Conference Paper |

Integration of the beam scraper and primary collimator in the SNS ring

H. Ludewig;N. Simos;D. Davino;S. Cousineau;N. Catalan-Lasheras;J. Brodowski;J. Touzzolo;C. Longo;B. Mullany;D. Raparia

Proceedings of the 2003 Particle Accelerator Conference

Year: 2003 | Conference Paper |

Cited by: Papers (2)

HTML

The collimation system in the SNS ring includes a two-stage collimator consisting of a halo scraper and an appropriate fixed aperture collimator. This unit is placed between the first quadru-pole and the first doublet in the collimation straight section of the ring. The scraper is situated at the exact mid-point between these two magnets, and the fixed aperture collimator fills the space between t...Show More

Integration of the beam scraper and primary collimator in the SNS ring

H. Ludewig;N. Simos;D. Davino;S. Cousineau;N. Catalan-Lasheras;J. Brodowski;J. Touzzolo;C. Longo;B. Mullany;D. Raparia

Proceedings of the 2003 Particle Accelerator Conference

Year: 2003 | Volume: 2 | Conference Paper |

Transverse instabilities in RHIC

M. Blaskiewicz;J.M. Brennan;P. Cameron;C. Dawson;C. Degen;K. Drees;W. Fischer;E. Koropsak;R. Michnoff;C. Montag;T. Roser;T. Satogata;N. Catalan-Lasheras

Proceedings of the 2003 Particle Accelerator Conference

Year: 2003 | Conference Paper |

Cited by: Papers (2)

HTML

The beam quality in RHIC can be significantly impacted by a transverse instability which can occur just after transition. Data characterizing the instability are presented and analyzed. Techniques for ameliorating the situation are considered.Show More

Transverse instabilities in RHIC

M. Blaskiewicz;J.M. Brennan;P. Cameron;C. Dawson;C. Degen;K. Drees;W. Fischer;E. Koropsak;R. Michnoff;C. Montag;T. Roser;T. Satogata;N. Catalan-Lasheras

Proceedings of the 2003 Particle Accelerator Conference

Year: 2003 | Volume: 5 | Conference Paper |

Electron-cloud mitigation in the Spallation Neutron Source ring

J. Wei;M. Blaskiewicz;J. Brodowski;P. Cameron;D. Davino;A. Fedotov;P. He;H. Hseuh;Y.Y. Lee;H. Ludewig;W. Meng;D. Raparia;J. Tuozzolo;S.Y. Zhang;A. Aleksandrov;S. Cousineau;V. Danilov;S. Henderson;M. Furman;M. Pivi;R. Macek;N. Catalan-Lasheras

Proceedings of the 2003 Particle Accelerator Conference

Year: 2003 | Conference Paper |

Cited by: Papers (1)

HTML

The Spallation Neutron Source (SNS) accumulator ring is designed to accumulate, via H/sup -/ injection, protons of 2 MW beam power at 1 GeV kinetic energy at a repetition rate of 60 Hz. At such beam intensity, electron-cloud is expected to be one of the intensity-limiting mechanisms that complicate ring operations. This paper summarizes mitigation strategy adopted in the design, both in suppressin...Show More

Electron-cloud mitigation in the Spallation Neutron Source ring

J. Wei;M. Blaskiewicz;J. Brodowski;P. Cameron;D. Davino;A. Fedotov;P. He;H. Hseuh;Y.Y. Lee;H. Ludewig;W. Meng;D. Raparia;J. Tuozzolo;S.Y. Zhang;A. Aleksandrov;S. Cousineau;V. Danilov;S. Henderson;M. Furman;M. Pivi;R. Macek;N. Catalan-Lasheras

Proceedings of the 2003 Particle Accelerator Conference

Year: 2003 | Volume: 4 | Conference Paper |

SNS ring optics tuning

J.A. Holmes;W. Wan;N. Catalan-Lasheras;A. Fedotov;I. Papaphilippou;J. Wei

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

Year: 2001 | Conference Paper |

Cited by: Papers (1)

HTML

Detailed studies of the SNS ring lattice optics have been conducted. The horizontal and vertical tuning ranges for matched solutions with well-behaved lattice functions were determined and the power supply margin verified. Using stability criteria, potential working points have been identified and studied in detail. Studies, focused on behavior of the lattice functions under increasingly complex a...Show More

SNS ring optics tuning

J.A. Holmes;W. Wan;N. Catalan-Lasheras;A. Fedotov;I. Papaphilippou;J. Wei

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

Year: 2001 | Volume: 5 | Conference Paper |

Effect of magnetic fields on the dose estimates due to beam halo loss in the ring collimation straight of the SNS

H. Ludewig;A. Mallen;N. Catalan-Lasheras;N. Simos;J. Wei;M. Todosow

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

Year: 2001 | Conference Paper |

HTML

The collimation straight section of the SNS ring consists of three collimators with magnets (doublets and correctors) between them. It has been determined that a large fraction of the particle halo loss occurs at the primary and secondary collimators. The dose to ring components in this location has been studied in the past. In this revised dose estimate the effect of including the magnetic fields...Show More

Effect of magnetic fields on the dose estimates due to beam halo loss in the ring collimation straight of the SNS

H. Ludewig;A. Mallen;N. Catalan-Lasheras;N. Simos;J. Wei;M. Todosow

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

Year: 2001 | Volume: 5 | Conference Paper |

The collimation system of the SNS transfer lines

N. Catalan-Lasheras;D. Raparia

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

Year: 2001 | Conference Paper |

Cited by: Papers (2)

HTML

The High Energy Beam Transport (HEBT) and Ring to Target Beam Transport (RTBT) lines of the Spallation Neutron Source (SNS) include collimation systems that protect the line itself, as well as the systems downstream. Due to the one-pass mechanism in a transfer line, collimation can only provide protection against accidental losses while shaping the beam is reserved for multi-pass systems as rings....Show More

The collimation system of the SNS transfer lines

N. Catalan-Lasheras;D. Raparia

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

Year: 2001 | Volume: 5 | Conference Paper |

Collimation optimization in high intensity rings

N. Catalan-Lasheras

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

Year: 2001 | Conference Paper |

HTML

In high intensity proton rings, collimation is needed in order to maintain reasonable levels of residual activation and allow hands-on maintenance. A small acceptance to emittance ratio and restrained longitudinal space become important restrictions when dealing with low energy rings. The constraints and specifications when designing a collimation system for this type of machine will be reviewed. ...Show More

Collimation optimization in high intensity rings

N. Catalan-Lasheras

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

Year: 2001 | Volume: 1 | Conference Paper |

Design optimization and the path towards a 2 MW Spallation Neutron Source

J. Wei;M. Blaskiewicz;N. Catalan-Lasheras;D. Davino;A. Fedotov;Y.Y. Lee;N. Malitsky;Y. Papaphilippou;D. Raparia;A. Shishlo;N. Tsoupas;W. Weng;S.Y. Zhang;R. Keller;J. Staples;J. Stovall;J. Billen;S. Kurennoy;S. Nath;H. Takeda;L. Young;R. Sundelin;A. Aleksandrov;Y. Cho;P. Chu;S. Cousineau;V. Danilov;M. Doleans;J. Galambos;J. Holmes;N. Holtkamp;S. Kim;R. Kustom;D. Jeon;E. Tanke;W. Wan

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

Year: 2001 | Conference Paper |

Cited by: Papers (3)

HTML

The Spallation Neutron Source (SNS) is designed to ultimately reach an average proton beam power of 2 MW for pulsed neutron production. The SNS physics groups analyze the machine performance within the hardware constraints, optimize the accelerator design, and establish the best path towards a 2 MW and higher Spallation Neutron Source.Show More

Design optimization and the path towards a 2 MW Spallation Neutron Source

J. Wei;M. Blaskiewicz;N. Catalan-Lasheras;D. Davino;A. Fedotov;Y.Y. Lee;N. Malitsky;Y. Papaphilippou;D. Raparia;A. Shishlo;N. Tsoupas;W. Weng;S.Y. Zhang;R. Keller;J. Staples;J. Stovall;J. Billen;S. Kurennoy;S. Nath;H. Takeda;L. Young;R. Sundelin;A. Aleksandrov;Y. Cho;P. Chu;S. Cousineau;V. Danilov;M. Doleans;J. Galambos;J. Holmes;N. Holtkamp;S. Kim;R. Kustom;D. Jeon;E. Tanke;W. Wan

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

Year: 2001 | Volume: 1 | Conference Paper |

SNS beam in gap removal

S. Cousineau;J. Holmes;N. Catalan-Lasheras

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

Year: 2001 | Conference Paper |

HTML

Stringent particle loss constraints for the SNS accumulator ring require that the beam gap must be kept clean. A fixed amplitude stripline kicker capable of reversing polarity turn by turn is being designed for this purpose. We present simulations of the beam in gap cleaning process, using the ORBIT code and modeling the kicker as a constant amplitude kick of programmable polarity sequence. We fin...Show More

SNS beam in gap removal

S. Cousineau;J. Holmes;N. Catalan-Lasheras

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

Year: 2001 | Volume: 3 | Conference Paper |

Thermo-mechanical response of the halo intercepts interacting with the SNS proton beam

N. Simos;H. Ludewig;N. Catalan-Lasheras;J. Brodowski;J. Wei

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

Year: 2001 | Conference Paper |

HTML

The integral part of the primary collimator of the SNS accumulator ring is a halo intercept assembly in the form of movable scraper blades that allow the interception of the halo protons in four planes. In order to achieve large Coulomb scattering of the halo protons and energy losses of less than 1%, platinum was chosen as the material of choice while its thickness was optimized to satisfy the en...Show More

Thermo-mechanical response of the halo intercepts interacting with the SNS proton beam

N. Simos;H. Ludewig;N. Catalan-Lasheras;J. Brodowski;J. Wei

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

Year: 2001 | Volume: 2 | Conference Paper |

Double-wall collimator design of the SNS project

N. Simos;H. Ludewig;N. Catalan-Lasheras;S. Crivello

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

Year: 2001 | Conference Paper |

Cited by: Papers (2)

HTML

The collimator absorber array of the Spallation Neutron Source (SNS) project is responsible for stopping the 1.0 GeV protons that are in the halo of the beam. It is estimated that 0.1% of the 2 MW beam will be intercepted by the adopted collimating scheme implemented at various sections of the beam transport and accumulation. This paper summarizes the conceptual design of the collimator absorber a...Show More

Double-wall collimator design of the SNS project

N. Simos;H. Ludewig;N. Catalan-Lasheras;S. Crivello

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

Year: 2001 | Volume: 2 | Conference Paper |

On the use of thin scrapers for momentum collimation

N. Catalan-Lasheras

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

Year: 2001 | Conference Paper |

HTML

In transverse collimation systems, thin scrapers are used as primary collimators to interact with the beam halo and increase its impact parameter on the secondary collimators or absorbers. In the same way, placing the primary collimator in a dispersion region is used for momentum collimation. However, the use of scrapers for momentum collimation presents an additional disadvantage when handling me...Show More

On the use of thin scrapers for momentum collimation

N. Catalan-Lasheras

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

Year: 2001 | Volume: 2 | Conference Paper |

IEEE Personal Account

Change username/password

Purchase Details

Payment Options
View Purchased Documents

Profile Information

Communications Preferences
Profession and Education
Technical interests

Need Help?

US & Canada: +1 800 678 4333
Worldwide: +1 732 981 0060
Contact & Support

Follow

About IEEE Xplore | Contact Us | Help | Accessibility | Terms of Use | Nondiscrimination Policy | IEEE Ethics Reporting | Sitemap | IEEE Privacy Policy

A public charity, IEEE is the world's largest technical professional organization dedicated to advancing technology for the benefit of humanity.

© Copyright 2025 IEEE - All rights reserved, including rights for text and data mining and training of artificial intelligence and similar technologies.

IEEE Account

Change Username/Password
Update Address

Purchase Details

Payment Options
Order History
View Purchased Documents

Profile Information

Communications Preferences
Profession and Education
Technical Interests

Need Help?

US & Canada: +1 800 678 4333
Worldwide: +1 732 981 0060
Contact & Support

About IEEE Xplore
Contact Us
Help
Accessibility
Terms of Use
Nondiscrimination Policy
Sitemap
Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest technical professional organization dedicated to advancing technology for the benefit of humanity.
© Copyright 2025 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.

Test Whats new message.