arnaud allézy , phd .
Mechanical Engineer at Lawrence Berkeley National Laboratory
Lawrence Berkeley National Laboratory
https://www.linkedin.com/company/lawrence-berkeley-national-laboratory
Berkeley, CA
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Mechanical Engineer
The NGLS collaboration is developing design concepts for a multi‐beamline soft x‐ray FEL array powered by a superconducting linear accelerator, operating with a high bunch repetition rate of approximately 1 MHz. The CW superconducting linear  accelerator design is based on developments of TESLA and ILC technology, and is supplied by an injector based on a high brightness, high repetition-rate photocathode electron gun. Electron bunches from the linac are distributed by RF deflecting cavities to the array of independently configurable FEL beamlines with nominal bunch rates of ~100 kHz in each FEL, with uniform pulse spacing, and some FELs capable of operating at the full linac bunch rate. Individual FELs may be configured for different modes of operation, including self-seeded and external-laser-seeded, and each may produce high peak and average brightness x-rays with a flexible pulse format, and with pulse durations ranging from femtoseconds and shorter, to hundreds  of femtoseconds. In this paper we describe current design concepts, and progress in R&D activities.
Design concepts for a Next Generation Light Source at LBNL
The 17th Pan-American Synchrotron Radiation Instrumentation Conference - at NIST, Gaithersburg, MD USA
https://docs.google.com/file/d/0B2xGecWoKlB-WERKUGFibVFvRDg/edit?pli=1
Extreme ultraviolet (EUV) lithography is a leading contender for the commercial mass-production of several generations of computer chips within the current decade. The widespread adoption of EUV lithography has been delayed by the limited light-source power and the unavailability of defect-free masks. The creation of production-quality masks relies upon dedicated, actinic mask-blank inspection and pattern-imaging tools, along with mask-repair and verification capabilities. Commercial tools are still several years from deployment. We are creating an EUV, synchrotron-based, mask-imaging microscope that will support advanced research and development of EUV masks in lithography generations to the year 2020 and beyond. Called SHARP (the SEMATECH High-NA Actinic Reticle review Project) the synchrotron-based microscope will emulate the optical properties of current and future EUV lithography tools.

We will discuss SHARP’s mechanical and engineering requirements and solutions developed to
ensure the project’s success. The most critical specification for the tool is the required nm-scale
relative position stability of the mask and zoneplate during exposures lasting up to 60 seconds. Both the mask and the zoneplate will be supported by a rigid internal frame, decoupled from the vacuum chamber, and mounted on an external active vibration isolation system. Additional challenges include two rapid-angle-scanning mirror elements in the three-mirror illuminator design. The SHARP microscope is under construction now and is due to become operational in the last months of 2012.
Creating an EUV Mask Microscope for Lithography Generations Reaching 8 nm
American Society of Precision Engineering (ASPE)
http://www.adc9001.com/data/1340803552_PUB58.pdf
Lawrence Berkeley National Laboratory's Center for X-ray Optics (CXRO) works to further science and technology using short wavelength optical systems and techniques. Since the early 2000s, CXRO has worked with semiconductor companies to develop the infrastructure needed for world-leading research and development in the field of EUVL, contributing basic research and development essential to the health of the U.S. industry as a whole before individual firms enter competition.

Two new Extreme Ultraviolet endstations currently designed at CXRO will be presented:

MET5 will be a unique instrument with twice the effective resolution of the best tools now in commercial use. MET5 and the new wafer-processing facility will allow the development and test of photosensitive materials capable of transferring patterns on the nanoscale,
SHARP will be the world’s most advanced extreme-ultraviolet (EUV) microscope, it will be dedicated to photolithography, the central process in the creation of computer chips.
The stability of those new systems in the projected vibration environment is a challenge. CXRO has experience with vibration mitigation techniques on its current endstations and the status of our investigations on the general strategy of vibration mitigation will be developed.
Vibration mitigation challenges in modern Extreme Ultraviolet tools for semiconductor Applications
HEPL SEMINAR, Stanford University
http://events.stanford.edu/events/324/32469/
In this work we present a new concept of a hybrid tape-spring for the deployment of space structures. The control of its unreeling, needed to avoid any risk of damage, is achieved thanks to a local heating of thermoplastic layers stuck on its surface. The lay-up properties and the geometry are chosen by minimizing the strain energy of the coiled state. The feasibility of the concept is proved experimentally and numerically thanks to a rst ABAQUS FEM model describing the coiling and the unreeling of the tape-spring.
Hybrid tape-springs for deployable hexapod
2009 AIAA/ASME Conferences
This paper deals with a hexapod using six rolled tape-springs for space applications. The first part focuses on the prototype design, especially on the blades connecting the tape-springs to the platform. The second part presents the finite element model of the deployed hexapod including pre-stressed and condensed tape-springs. It is compared with the experimental modal testing of the prototype and used as a linear elastic model in the third part, which deals with the correction capability of the hexapod. Jacobian matrices, dexterity and correction capability are defined as performance criteria. Designed to guarantee an equivalent spherical junction, the thin blade configuration does not offer a significant better correction capability compared to the thick blade configuration. Moreover, thick blades provides better deployment repeatability, stiffer behavior. Consequently, the investigation highlights that hexapod kinematics can be ensured by tape-spring flexibility which eliminates the need of connecting blades.
On the correction capability of a deployed tape-spring hexapod
Mechanism & Machine Theory
http://www.sciencedirect.com/science/article/pii/S0094114X07001292
This article deals with damping due to transient motion in the case of a Multi-Degree-Of-Freedom (MDOF) system. The main aim of this research is to make the method presented in a previous article by the authors available for MDOF systems. An original method based on relativity concepts is developed in order to identify, prove and evaluate a metric damping due to time-varying forcing frequencies. An additional dimension for each Degree-Of-Freedom (DOF) is introduced. The variational problem of the metric of a Riemannian space gives the geodesic equations, i.e. equations of motion which, after time integration is carried out with several types of numerical schemes, permits predicting the forced transient response of a 3-DOF system. The proposed metric approach is validated experimentally.
Metric Damping of MDOF Systems in High Transient Motion
ASME - DETC2003
http://asmedl.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=ASMECP002003037033002549000001&idtype=cvips&prog=normal
Predicting an imbalance response of rotating machinery during transient speed which matches the experimental one with a satisfactory accuracy is a difficult task. The aim of this paper is to establish a model as reliable as possible in order to compare predicted and measured transient imbalance responses and to clarify the influence of both the damping effect and the transient speed. In particular, phenomena due to fast run-up/downs are highlighted.
A theoretical investigation is carried out on an academic rotor simply supported at its ends. The imbalance response of this rotor subjected to various run-ups and run-downs has been determined by using the nondimensional form of the motion equations obtained by using the Rayleigh-Ritz method. Despite the fact that the amplitude for run-down is bigger than for run-up, the behavior of the rotor in the case of run-ups is similar to the one for run-downs.
Furthermore, in order to exhibit phenomena due to transient effects, an experimental set-up has been developed, whose design has been chosen as simple as possible. A particular attention has been paid on the identification of its characteristics. Using the FE and modal methods, the associated model has been designed. A significant deviation, due to a non-satisfactory damping modeling, has been shown between the predicted and the measured imbalance responses; it has been significantly reduced using a so-called metric method of modeling damping.
Theoretical and experimental investigations on rapid run-up/down of rotating machinery
http://iftomm-rotordynamics2006.mdmt.tuwien.ac.at/cd/html/ID/293.html
SmartGD&T for Design, Manufacturing and Inspection
Multi Metrics
Vacuum Systems Design
AVS
Vibration Aspects for Accelerators
IU/USPAS: PHY 671
SHARP is an extreme-ultraviolet-wavelength microscope dedicated to photomask imaging for the commercialization of EUV photolithography.
Created by the Center for X-Ray Optics at Lawrence Berkeley National Laboratory for SEMATECH and its member companies, SHARP gives researchers from the world's leading semiconductor companies a window into the future of computer-chip fabrication.
The SHARP EUV Mask Microscope
http://sharp.lbl.gov
LinkedIn
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Developing Adaptability as a Manager
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LinkedIn
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Leading with Emotional Intelligence
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https://www.linkedin.com/in/fabricematichard
Berkeley, CA
Fabrice Matichard
Engineering Principal Lead
https://fr.linkedin.com/in/fr%C3%A9d%C3%A9ric-lefevre-ba2484130
Greater Lyon Area
Frédéric LEFEVRE
Professor - INSA Lyon
https://www.linkedin.com/in/yuting-chen-65514747
Berkeley, CA
Yuting CHEN
Energy Policy Staff Data Scientist at Berkeley Lab
https://fr.linkedin.com/in/guizheng-yin-2a10b6179
France
Guizheng Yin
学生 - INSA Lyon - Institut National des Sciences Appliquées de Lyon
https://fr.linkedin.com/in/fran%C3%A7ois-rousset-b75016ab
France
François Rousset
Directeur des études du département GEn - INSA Lyon 
Enseignant-chercheur
https://fr.linkedin.com/in/romsl
Béziers
Romain Saint-Léger
Ingénieur d'études Gisements Renouvelables chez TotalEnergies
https://www.linkedin.com/in/armanshehabi
Berkeley, CA
Arman Shehabi
Research Scientist
https://www.linkedin.com/in/zjackieyaophducla
Berkeley, CA
Zhi (Jackie) Yao, PhD
2019 Luis W. Alvarez postdoc fellow in Computing Sciences at Berkeley Lab
https://fr.linkedin.com/in/louis-chareton-697b9b204
Rueil-Malmaison
Louis CHARETON
Économiste chez TotalEnergies
https://fr.linkedin.com/in/hannah-hofman-aa07b3194
France
Hannah Hofman
Chargée projet chez Total
https://www.linkedin.com/in/grayson-gilbert
Annapolis, MD
Grayson Gilbert
Mechanical Engineering Student at the University of Maryland
https://ca.linkedin.com/in/daniel-brooks-1346b24
Toronto, ON
Daniel Brooks
Professor at University of Toronto
https://www.linkedin.com/in/jordanfidler
Denver Metropolitan Area
Jordan Fidler
Optomechanical Engineer at Fathom Radiant
https://il.linkedin.com/in/israel-grossinger
Israel
Israel Grossinger
CEO & Founder at HoloOr
https://ca.linkedin.com/in/thomas-grandin-mba-m-eng-pmp-pmc-vi-a576694
Kitchener, ON
Thomas Grandin (MBA, M.Eng, PMP, PMC-VI)
Product Manager at ATS Automation
https://www.linkedin.com/in/andrew-lambert-0722a73b
Berkeley, CA
Andrew Lambert
Mechanical Engineer III
https://www.linkedin.com/in/steven-rossi-2809b842
Concord, CA
Steven Rossi
Advanced Light Source Division Deputy for Business Operations at Berkeley Lab
https://www.linkedin.com/in/cyril-williams-ph-d-p-e-89a1b261
Aberdeen Proving Ground, MD
Cyril Williams, Ph.D., P.E.
Senior Research Engineer at Army Research Laboratory
https://www.linkedin.com/in/khader316
Potsdam, NY
Khader Ali Khan
Mechanical Engineer
https://www.linkedin.com/in/xieyusc
Pasadena, CA
Yu Xie, PE
Mechanical Engineer at AlfaTech
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Looking for an exciting position to join Berkeley Lab? Check this opening for the next generation synchrotron, #mechanicalengineering #teamscience…
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So excited to share this amazing news and grateful to be part of the Neurona team!!
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Congrats Alexandre Remy for being awarded Wine Enthusiast’s 40 Under 40 Tastemakers of 2021 👏🥳! https://lnkd.in/daYb2mBeAtlas Wine Co Wine…