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HDR Architecture, Inc.
Principal,
Senior Vice President
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Ahmad
Soueid is a Principal / Senior Vice President of HDR
Architecture, Inc. He joined HDR over twelve years ago
as a registered architect after working for architectural
firms in New York, Connecticut and Texas. He focuses
exclusively on the design and construction of advanced
technology facilities for both private and public sector
clients.
Ahmad Soueid is a registered architect that offers creative
solutions to technically challenging nanotechnology
facilities. Mr. Soueid is a leader in the design of
nanotechnology facilities and he serves as a hands-on
Principal for a prestigious list of nanotechnology projects
such as the NIST Advanced Measurement Laboratory,
a 511,070 square feet $175M state-of-the-art laboratory;
Purdue University's $47M Birck Nanotechnology
Center as well as Brookhaven National Laboratory's
$28M Center for Functional Nanomaterials.
Mr. Soueid also consulted as a
nanotechnology facilities advisor to Mexico's Centro
Nacional de Metrología as well as the U.K.'s
National Physical Laboratory. Mr. Soueid was
co-chairman of the Buildings for Advanced Technology
Workshop (January 2003) organized in part under
the National Nanotechnology Initiative (NNI) in conjunction
with NIST and the Naval Research Laboratory (NRL) as
well as the Buildings for Advanced Technology Workshop
II (January 2004), sponsored by Arizona State University.
Mr. Soueid's is a frequent speaker
at technical conferences. Mr. Soueid's presentation
on the "Technical Challenges of designing Bio-Nano
spaces in a Cleanroom environment" was a featured
case study at a recent Tradeline Conference on Nanotechnology
facilities. Other presentations include a variety of
topics, including "High Accuracy Temperature
Control in Metrology Laboratories" at the Quality
Manufacturing 2000 Conference in Birmingham, United
Kingdom, and a presentation at the "New Trends
in Metrology Workshop" the National Physical
Laboratory in Teddington, United Kingdom as well as
"A Case Study for Designing for Nanotechnology"
to the Ottawa Valley Chapter of ASHRAE in Canada.
Mr. Soueid graduated from
the University of Texas at Arlington where he received
both a Bachelor of Science in Architecture and a Master
of Architecture degree.
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| Presentations |
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Buildings
for Advanced Technology
As Nanotechnology research compels
the scientific world to explore new uncharted territories,
scientists are increasingly demanding more stable research
environments. Scientists are manipulating matter at
the atomic and molecular scales in order to obtain materials
and systems with significantly improved properties.
This level of research imposes more strenuous demands
on the physical environment. These demands include high
levels of accuracy in temperature and humidity control,
vibration and acoustic isolation, air cleanliness (from
particulate and/or biological contaminates), EMI and
RFI shielding as well as the need for good quality electrical
power. Once dubbed state-of-the-art, laboratory facilities
are becoming obsolete to accommodate future research.
Scientists are finding themselves spending time working
on improving the physical environment and diverting
valuable resources away from research. The most economical
fix is to introduce self-contained mini environments
that improve the environmental characteristics around
the experiment, however conflicting environmental criteria
are demanding increasingly complex infrastructures.
Many institutions are realizing the need for designing
and constructing new facilities with criteria that is
more and more restrictive. This presentation elaborates
on advanced technology facilities and provides a quick
overview of international facilities that are either
in design, under construction or recently completed.
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• NIST Advanced Measurement Laboratory Site Overview |
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• Systems Integration and Competing Criteria |
| Ahmad
Soueid, Dave Bechtol, Hal Amick |
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National Institute of Standards and Technology
SEM
Project Leader, Nanometer-Scale Metrology Group
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Dr. András E. Vladár
is the leader of Scanning Electron Microscope Metrology
Project at the Nano–Scale
Metrology Group of the National Institute of Standards
and Technology. He holds M.S. (1977) and Ph.D. (1984)
degrees in Electrical Engineering from the Technical
University of Budapest, Hungary. Until 1991
he worked as a Research Fellow at the Research Institute
for Technical Physics of the Hungarian Academy of
Sciences, Budapest. Dr. Vladár is an
expert in scanning electron microscope (SEM) critical
dimension (CD) metrology; he has developed several
metrology systems based on SEMs. Prior to joining
NIST in 1999, he was a member of the technical staff
of Hewlett–Packard ULSI Research Laboratory and primarily
worked on accurate, fast and effective dimensional
measurement methods for 100 nm silicon integrated
circuit technology. At Hewlett–Packard he established
sound metrology methods, procedures and practices
that significantly improved the speed and quality
of dimensional measurements, surface inspection and
film thickness measurements in the Class 1 integrated
circuit fabrication facility. He identified the main
sources of measurement errors and developed several
successful methods to eliminate many of them.
Dr. Vladár is the member and key contributor to the
work of the Advanced Metrology Advisory Group of
International SEMATECH (ISMT). This group is the only
body of experts in the world that deals with the
special issues of dimensional metrology for the
leading integrated circuit manufacturing. Dr.
Vladár had been instrumental in the development of
new methods to deduce the shape of integrated circuit
structures from top–down view images through
modeling and library–based measurement techniques.
Several researchers and CD–SEM tool manufacturers
are now implementing this idea. He has
advocated the need for the development of a document
that can foster the faster development of better SEMs,
and especially the so–called critical dimension
CD–SEMs. He has also played an important role in the
development of standardized metrology procedures for
the semiconductor community as a whole through
authoring multiple sections in the measurement
guidelines described in the Unified Advanced CD–SEM
Specification published by ISMT.
Dr. Vladár as the leader of the SEM Metrology Project
is the scientific manager for the development and
renewal effort of the metrology SEM. This specialized
tool is currently undergoing major improvements in
hardware and measurement control software.
Additionally, for standard calibration purposes, a new
scanning electron microscope-based, best-in-the-world
dimensional measurement system is being designed. This
instrument is planned to be used in the NIST Advanced
Measurement Laboratory (AML).
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| Presentation |
| Scanning
Electron Microscopy in Real-World Environments |
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Electron microscopes
are working close to atomic levels and it is expected
that they are going to be key imaging and metrology
tools in the upcoming nanotechnology. Almost all scanning
electron microscopes are limited in their operation
by their environment. Usually it is possible to achieve
significantly better performance than the specification
of these tools by the proper design of their environment
and by the use of supplementary compensatory methods.
Vibrations transmitted by the building, air (sound)
and water and gas supply have obvious detrimental effects
to image and measurement quality of these instruments.
Low and high frequency electromagnetic fields interfere
with the electronics of the microscope and also with
the electrons used in the signal generation and detection.
This presentation will present detailed specifications
and requirements for the environment of SEMs; and will
show examples for the various negative effects of the
environment, and some possible methods useful to minimize
them.
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HDR Architecture, Inc.
Senior
Vice President/Principal
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Bea Sennewald's Senior Vice
President of HDR Architecture and HDRs principal
in London. She joined HDR in 1983. Her work has focused
on research, high technology and industrial applications.
She has designed over six million square feet of space
for corporate, academic and government research facilities,
including physical sciences, computer sciences, communications,
biology, materials science, microelectronics, and
toxicology. She is an expert at specialized requirements,
including clean room technology, temperature and vibration
control and electromagnetic shielding.
Ms. Sennewald was a contributing
author for the Handbook of Laboratory Design, has
published frequently in Architecture, Architectural
Technology, Specifications, and R&D. She is a
regular speaker at conferences.
She was also an advisor to the
National Institutes of Health for laboratory design
standards.
She was the design director
for the Advanced Measurement Laboratories for NIST
in Gaithersburg and Boulder. Her recent work includes
projects in England, France, Germany and the Netherlands.
Ms Sennewald received a Master
of Architecture degree (magna cum laude) from the
University of Oregon.
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| Presentation |
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Measurements of Temperature Stability and Uniformity in
Several Types of Laboratories |
Julian
Hunt, Bea Sennewald
This session will describe a series of temperature
measurements of laboratory spaces undertaken by scientists
at the National Physical Laboratory in the U.K.
It will show measurements of stability
and uniformity in laboratories with varying types of
air flow and varying degree of complexity in temperature
control design. The labs include spaces with low-velocity
non-directional air flow, unidirectional vertical and
horizontal airflow. It will also show measurements of
the effect of heat sources in horizontal and vertical
air flow.
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Erdman Measurement Consulting
President
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Bob has over 40 years experience
in making sensitive measurements and managing related
projects, mainly at Keithley Instruments, the leading
manufacturer of very sensitive electronic measuring
instruments. He has designed the most sensitive Ammeter
and Voltmeter commercially available, advised many
scientists on difficult measurement problems and worked
with Scientists and Architects to design nanotechnology
buildings.
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| Presentation |
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Interactions between Nanomeasurements and Nanobuilding
Design |
The
building can limit the Experimenter's ability to make
sensitive measurements on nanostructures. A discussion
of ways to estimate interference and determine whether
shielding is needed and how good the shielding has to
be are presented, along with instrument characteristics
that impact this determination. Generally, electrostatic
shielding must be done at the experiment in any case and
the building does not impose a limit to measurement. Magnetic
interference is determined by loop area enclosed by current-carrying
wire. Building design can be more of a limit in this case.
Users and building designers must effectively communicate
with each other to understand the limitations of both
shielding at the experiment and the building, in order
to agree on acceptable levels of interference that will
permit nanomeasurements to be made.
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Grounding Needs of Instrumentation |
Why the "3rd pin" of the power plug is GROUND,
not a reference.
Filters and capacitance dump ac currents into this line.
Some equipment has ac power line current in this line.
Therefore the voltage with respect to the earth is different
at different points.
It can be volts away from the experiment ground
In general it is not quiet, thus transmits noise into
a grounded experiment.
Impact of this on the measurement
and instrumentation:
Discussion of CMRR, related to NMRR from my Wednesday
talk.
Calculation of CMRR errors, typical numbers
Quick review of coupling mechanisms from Wednesday:
If the shield is tied to a noisy ground, it becomes
an unwanted transmitter
A Reference Bus solves these problems.
How to handle it: rules for connecting
Tie to earth
Tie to building ground at point of earth connection
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National Institute of Standards and Technology
Division
Chief, Manufacturing Metrology Division
Manufacturing
Engineering Laboratory
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Dr. Teague is Chief of the Manufacturing
Metrology Division in the Manufacturing Engineering
Laboratory of the National Institute of Standards
and Technology.
At NIST since 1972, Dr. Teague
has designed, constructed, and used precision instrumentation
for ultra-high accuracy dimensional metrology of surfaces
and micrometer to nanometer-scale features. Beginning
with his metal-vacuum-metal tunneling work in the
1970's, he continued to work with such precision instrumentation
as scanning tunneling microscopes, atomic force microscopes,
displacement and phase-measuring interferometry, stylus
instruments, flexure stages, and light scattering
apparatus. Because the laboratory and building environments
were always factors in the ultimate performance of
these instruments, the subject of this workshop has
been an ongoing topic of great interest.
Dr. Teague is a member of the
American Society for Precision Engineering, has served
twice as the Society's President, and is a fellow
of the UK Institute of Physics. He served as Editor-in-Chief
of the international journal Nanotechnology for ten
years and is currently a member of the Editorial Board
of the journal. He holds a B.S. and M.S. in physics
from the Georgia Institute of Technology and a PhD
in physics from the University of North Texas. He
has authored or coauthored 70 papers, has presented
50 invited talks in the technical fields described,
and jointly with colleagues, has six patents. Dr.
Teague has received the Gold Medal, Silver Medal,
and Allen V. Astin Measurement Science Award from
the Department of Commerce, the Kilby International
Award by the Kilby Awards Foundation, and an IR-100
Industrial Research and Development Award for his
work.
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| Presentation |
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This introduction covers
the workshop motivations, goals and objectives as well
as general logistics. It also includes an overview of
the session topics and the general organization of the
sessions.
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During this session, we will present
and discuss entries for the technical survey that was
developed by the organizers and made available to all
speakers and attendees via the workshop’s website.
Developing and making available agreed upon technical
performance specifications for the important environmental
properties of workspaces in facilities for advanced
science and technology is one of the principal goals
for the workshop. Proposed entries in the tables
will be based on results from the survey, information
contributed during the workshop talks and dialog among
workshop participants. Included in the survey
are tables for temperature control, relative humidity,
atmosphere control and cleanliness, electrical power,
tilt stability and vibration levels of laboratory floors,
background acoustic noise levels in laboratories, and
background EMI & RFI levels in laboratories.
Four levels of specifications have been chosen for each
of the environmental properties: Class 1: the “standard”
laboratory; Class 2: the “clean room” laboratory; Class
3: the “atomic manipulation/measurement” laboratory;
and Class 4: the “high-accuracy metrology” laboratory.
Entries in the tables for each of the environmental
properties will represent both experience and knowledge
of what can be achieved and the performance levels required
for a specific application. The goal for this
session is to complete the survey and to allow time
for participants to present their points of view about
the proposed specifications.
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HDR
Architecture, Inc.
Senior
Vice President
Professional
Associate
Electrical Section
Manager
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Mr. Bechtol is a Senior Vice
President and a Professional Associate of HDR and
the Electrical Section Manager. He has over 23 year
of experience in the planning and design of lighting,
power and communication systems for laboratory, institutional,
health care and justice facilities.
Mr. Bechtol has designed laboratory
electrical systems for the Department of Defense and
the Food and Drug Administration. His university laboratory
experience includes Johns Hopkins, Duke, UNC and UVA.
At the National Institute of Standards and Technology
(NIST) Advanced Measurement Laboratory, Mr. Bechtol
developed a power distribution system to provide two
sources of clean isolated power to each lab to reduce
the effects of power disturbances from adjacent labs
and from building equipment including lights, elevators
and mechanical equipment. He is currently the lead
electrical engineer for the Purdue University Birck
Nanotechnology Center.
Mr. Bechtol received a
Bachelor of Architectural Engineering degree from
Penn State in 1979. In 1984, he received his Professional
Engineer's license. He is a member of the Illuminating
Engineering Society (IES) and the International Association
of Electrical Inspectors.
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| Presentation |
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Designing for Clean Power |
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The effects on sensitive
electronic equipment form external and internal sources
of power disturbances can be mitigated by the application
of various types of power conditioning equipment and/or
by varying the configuration of the power distribution
system in a way to provide clean power to the sensitive
equipment.
Transient voltage surge suppression devices, isolation
transformers, uninterruptible power supplies, generator
and other types of power conditioners can be used to
protect lab equipment from one or more different types
of power disturbances.
Varying the configuration of the power distribution
system can in itself improve power quality at the lab.
By applying power conditions at selected locations within
the distribution system, the quality of power can be
greatly enhanced.
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Systems Integration
and Competing Criteria |
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Ahmad Soueid, Dave Bechtol, Hal
Amick
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Acentech
Incorporated
Chief
Engineering Scientist
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After receiving his BSME degree
from Washington University in St. Louis, Dr. Ungar
worked for three hears on development of second-generation
atomic weapons at Sandia Corporation in Albuquerque,
NM. There he also attended the University of New Mexico,
from where he received his MS degree. Subsequently,
he served as instructor in mechanical engineering
at New York University while he pursued his doctoral
studies. He was awarded the degree of Doctor of Engineering
Science from NYU in 1957 and then was appointed assistant
professor. In 1959 he joined the renowned research
and consulting firm of Bolt Beranek and Newman, Inc.,
in Cambridge, MA, where he held several technical
and management positions until his retirement from
there in 1996 as Chief Consulting Engineer. Since
then he has been serving as Chief Engineering Scientist
at Acentech Incorporated in Cambridge, MA.
Dr. Ungar is a Fellow of the
Acoustical Society of America and served as that societys
President in 1992-93. He is a Life Fellow of the American
Society of Mechanical Engineers and held the chairmanship
of its Design Engineering Division in 1978-79. He
is a board-certified member of the Institute of Noise
Control Engineering, whose presidency he held in 1985,
and he is an Associate Fellow of the American Institute
for Aeronautics and Astronautics.
In addition to having published well over 200 technical
papers and more than a dozen chapters in handbooks
and monographs, Dr. Ungar has translated and revised
the book Structure-Borne Sound, which
is considered as a classic in its field. He has chaired
highly regarded short courses on Vibration Control
at the Pennsylvania State University for more than
twenty years and has lectured in these and numerous
other courses in the US, Sweden, France, Brazil, and
Australia.
The American Society of Mechanical Engineers awarded
him its Per Bruel Gold Medal for fundamental
contributions to noise and vibration control engineering
involving structural damping, vibration isolation,
and vibrations of complex structures, as applied to
aerospace vehicles, ships, machines, and buildings.
The Acoustical Society of America honored him with
its Trent-Crede medal for his important contributions
to our understanding of vibrations in complex structures,
the effects of structural damping, and the propagation
of structure-borne sound.
Dr. Ungar has consulted on vibrations of numerous
high-technology facilities, including nano-mechanics
and microbiology laboratories and installations for
advanced, optics, and astronomy research. He also
has served as consultant on facilities that require
high resistance to vibration-related damage or malfunction,
including the Presidents helicopter hangar and
various aircraft test cells. He has pioneered in the
development of what has become the standard method
for predicting footfall-induced vibrations in buildings
that house sensitive devices and has consulted on
vibration isolation of instruments, machinery, and
entire buildings.
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| Presentation |
Vibration Isolation at Building Level
(Vibration Control) |
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In order to discuss the process
of vibration control in advanced technology facilities,
one must have a rudimentary understanding of how vibrations
are characterized. This presentation will open with
a discussion of some of the vocabulary and quantities
associated with vibrations and their representation.
The basic quantities of sinusoidal vibrations will be
discussed, along with those associated with random and/or
impact excitation. Typical interior and exterior sources
are discussed, along with typical approaches to their
control.
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Colin Gordon and Associates
Vice
President, Technology Development
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Mr. Amick received a Bachelor
of Science in Civil and Architectural Engineering
from the University of Wyoming in Laramie, Wyoming,
a Master of Science. in Structural Engineering at
the University of California, Berkeley, California
and a Master of .Engineering. In Civil Engineering
from the University of California in Berkeley, California.
Mr. Amick works on problems related to structural
and soil dynamics, rail and transportation vibrations,
mechanical vibrations, and community or workplace
vibrations. He is experienced in signals processing,
finite element modeling and many aspects of structural
and soil dynamics. Hal Amick has worked extensively
in the design of low vibration environments for advanced
technology facilities.
Hal Amick joined Colin Gordon
& Associates in 1996, after spending eleven years
with Bolt Beranek & Newman and Acentech. Prior
to 1990, he worked closely with Colin Gordon at BBN.
At Colin Gordon & Associates he focuses on the
design and maintenance of low-vibration environments
for vibration-sensitive facilities used for research,
development and production of microelectronics as
well as those used for nanotechnology, optics research,
advanced physics and bioscience studies. His early
consulting work involved a wide variety of structural
settings, including nuclear power plant seismic analysis,
container crane design, and structural failure analysis.
Since 1993 he has served as vibration consultant for
design and renovation of laboratories at the National
Institute of Standards and Technology (NIST). Mr.
Amicks selected project experience includes:
Advanced Measurement Laboratory (NIST); M. D. Anderson
Cancer Research Center; Genentech Hall (Building 24),
University of California, San Francisco, Mission Bay
Campus;Knudsen Hall West, UCLA; Huntsman Cancer Research
Center, University of Utah; California Nano Systems
Institute, University of California at Santa Barbara;
Birck Nanotechnology Research Center, Purdue University;
P-050 Nano Science Research Laboratory, Naval Research
Laboratory; and Seagate Research Center.
Hal Amick has written and presented
many papers and reports, and has published extensively.
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| Presentation |
Isolating Instruments from Building Vibration
(Reducing Vibration Within the Building) |
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The
ultimate objective of the vibration engineer-when designing
buildings for advanced technology-is to protect vibration-sensitive
equipment from vibrations. In order to do this in an
economical manner, the engineer must
establish the vibration requirements of the items of
equipment that will be used. Not all instruments are
equally sensitive. The tests used to document vibration
sensitivity will be discussed, and this will lead to
a presentation of generic vibration criteria.
The first session discussed
means by which the designer controls vibrations within
the building system itself. In many cases, however,
it is desirable to reduce vibrations at the equipment
itself, using either external or internal vibration
isolation systems. Options are discussed for internal
vibration isolation systems-usually within the purview
of the equipment designer-as well as external isolation
systems-under the control of either the building designer
or the equipment user.
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Systems Integration
and Competing Criteria |
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Ahmad
Soueid, Dave Bechtol, Hal Amick
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Bartlett Consulting
Principal
Mr. Bartlett is
the Principal of Bartlett Consulting with over 35 years experience
in facilities engineering. He is currently the Quality Assurance
Manager for construction of NIST's $200 million Advanced Measurement
Laboratory (AML), responsible for ensuring the construction
contractor builds the AML in accordance with the very specialized
construction features specified in the contract. The AML is
designed to meet the stringent requirements of NIST's most
sensitive and critical laboratory programs in the areas of
temperature and humidity control, vibration isolation, air
cleanliness, electrical power quality and electromagnetic
interference. All of these requirements are being met on a
scale unlike any other in the world. All aspects of the construction
process and building trades contribute to the total finished
facility.
Prior to this project, Mr. Bartlett
was a civilian in the Naval Facilities Engineering Command,
serving in a series of management and leadership positions:
Director of Client Liaison for the Navy's $8 billion facilities
enterprise world-wide; Director, Facilities Acquisition
Directorate; Director, Interagency Construction Division;
Director, Navy Military Construction Division; and, from
1982 to 1987, Director of Program Management for the $2
billion, 10-year construction program to build a TRIDENT
Submarine base in Georgia. From 1978 to 1980, he was a Design
Engineer for the Smithsonian Institution, preparing plans
and specifications and managing Architect/Engineer contracts.
From 1967 to 1978, Mr. Bartlett was an officer in the Navy's
Civil Engineer Corps and had tours managing construction;
Seabee Company Commander in Viet Nam; various public works
jobs in Japan; and staff duty with the Strategic Systems
Projects Office in Washington, DC. After release from Active
Duty, he remained active in the Reserves, including a tour
as a Seabee Commanding Officer, and retired in 1997 as a
Captain, after 30 years of commissioned service.
Mr. Bartlett holds a Bachelor
of Science degree in Electrical Engineering, and a Master's
degree in Engineering Administration (Construction Management).
He is a registered Professional Engineer in Virginia. Mr.
Bartlett has served as Chairman, Research Committee; Chairman
Fully Integrated and Automated Project Process (FIAPP) Committee,
both of the Construction Industry Institute and Chairman,
Project Management Committee, of the Federal Facilities
Council (a consortium of over 20 federal agencies).
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| Presentation |
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Quality Assurance Considerations in Advanced Technology
Building Construction |
James
Barlett, Todd Snouffer
Constructing Advanced Technology Buildings takes special
forethought and focus to actually achieve what is required
to have them perform. Advanced Technology construction
requires special construction methods and rigorous attention
to details. This presentation will cover the emphasis
needed during the construction process and present some
lessons learned.
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National Nanotechnology Coordinating Office
Director
Naval
Research Laboratory
Head,
Chemistry Division
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Dr. James S. Murday received
a Bachelor of Science in Physics from Case Western
Reserve in 1964, and a Ph.D. in Solid State Physics
from Cornell in 1970. He joined the Naval Research
Laboratory (NRL) in 1970, led the Surface Chemistry
effort from 1975-1987, and has been Superintendent
of its Chemistry Division since 1988. From May to
August 1997 he served as Acting Director of Research
for the Department of Defense, Research and Engineering.
He is a member of the American Physical Society, the
American Chemical Society and the Materials Research
Society; and a fellow of the American Vacuum Society
(AVS), and the UK Institute of Physics. For the AVS,
he has served as trustee for 1981-1984, director for
1986-1988, representative to the American Institute
of Physics Governing Board 1986-1992, president for
1991-93, and representative to the Federation of Materials
Societies 1998-present.
His research interest in nanoscience began in 1983
as an Office of Naval Research program officer and
continues through the NRL Nanoscience Institute. He
has organized numerous International STM/NANO conferences
and their proceedings. Under his direction, both the
AVS and the International Union for Vacuum Science,
Technology and Applications created a Nanometer Science/Technology
Division. He is Executive Secretary to the U.S. National
Science and Technology Council's Subcommittee on Nanoscale
Science Engineering and Technology (NSET) and Director
of the National Nanotechnology Coordinating Office.
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National Institute of Standards and Technology
Chief,
Process Measurements Division
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Precitech, Inc.
Vice-President
of Engineering
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Since February of 2002, Jeffrey
W. Roblee has been with Precitech of Keene, New Hampshire
where he holds the position of Vice President of Engineering.
Precitech is a world leader in the design and manufacture
of ultra precision machine and metrology systems.
From 1977 to 1990, Dr. Roblee
held research positions at Lawrence Livermore National
Laboratory in California. There he developed ultra-precision
machine tools and measuring instruments for use in
optics fabrication. As part of this work, he was involved
in numerous facilities development for these devices.
His research work led to a 14 month assignment at
Phillips Research Laboratory in The Netherlands in
1986 and then to a research position at Carl Zeiss
in Oberkochen, Germany in 1990. As a member of the
Optical Process Development Laboratory, he led four
projects that improved the fabrication time, precision
and finish of optical components by more than a factor
of two.
In late 1993 he joined the Optical
Engineering Department at Polaroid Corporation in
Cambridge, Massachussetts. At Polaroid, Dr. Roblee
led a program to develop a laser print head for use
in making medical images and other purposes. In 1997
he received Polaroids title of Distinguished
Engineer and the Engineering Excellence Award from
the Optical Society of America in recognition of his
work on improving optical fabrication processes. Dr.
Roblee was named Technical Director in 1998 with responsibility
for three departments in Polaroid R&D: Model Shops,
CAD Technology Center and Concept Engineering. In
early 2001 he was chosen to lead the Optical Engineering
Department as well.
Dr. Roblee holds a number of
patents and has written numerous papers on temperature
control, machine dynamics, air bearing design, optics
fabrication and opto-mechanics. He is currently a
member of the American Society of Precision Engineering.
Jeffrey W. Roblee has a M.S. and Ph.D., both in mechanical
engineering, from the University of California at
Berkeley, 1979 and 1985. His B.S.M.E. is from the
University of Arkansas, 1978.
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| Presentation |
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Case Studies of Precision Temperature Control Systems
for Air Showers and Liquids at Lawrence Livermore National
Laboratory |
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The impact of temperature fluctuations
on the accuracy of machine tools and metrology instruments
has been recognized for some time. Many studies
have been done over the years, and thermal effects are
clearly the largest source of nonrepeatable error in
precision machine tools and measuring machines.
Consequently, Lawrence Livermore National Laboratory
has had numerous programs over the last forty years
to mitigate the effects of temperature. In this
talk, I will review some of the more important developments at
LLNL in precision temperature control. I will
discuss the principles that were used, and illustrate
them with some case studies. Systems have been
developed to precisely control the temperature of large
flows of oil, water and compressed gas. Seperate
means were also used to control air showers over individual
machines, but similar principles of temperature control
were used. Different implementations are
possible for doing precision temperature control, but
it was found that very high levels of precision were
possible at relatively low cost, if proper principles
were followed. Temperature control systems were
essential to the success of the Large Optics Diamond
Turning Machine at LLNL, and they will be one of the
case studies that will be discussed in detail..
It used 500 l/min of water which was controlled to +/-
0.0002 degrees C, and it used an air shower with 570
cubic meters per minute flow which was controlled to
+/- 0.002 degrees C for days at a time.
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National Institute of Standards and Technology
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Dr. Lawall came to NIST
as an NRC postdoctoral fellow in the Laser Cooling
and Trapping group in 1995. Since 1997 he has
been a staff member in the Quantum Metrology Group.
His current research work involves ultra-high accuracy
laser interferometry with stabilized CW lasers, and
frequency combs using mode-locked femtosecond lasers.
Dr. Lawall received his B.S. degree in physics from
Stanford University and his PhD in experimental atomic
physics from Harvard University. Prior to starting
his PhD work, he spent two years as a Peace Corps
volunteer in Mali, where he taught mathematics at
the Lycée de Segou and constructed energy-efficient
wood stoves. Following his doctoral degree,
he was a Chateaubriand postdoctoral fellow in Paris
at the Ecole Normale Superieure, where he was instrumental
in laser cooling a three-dimensional gas of atoms
to 180 nanoKelvin, the record temperature at that
time.
In his spare time Dr. Lawall plays the violin and
viola in chamber ensembles and enjoys whitewater kayaking.
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| Presentation |
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Acoustic and Vibration Control in Vacuum: A Case Study |
I will
present the approach of an experimental physicist to the
problem of control of seismic and acoustic disturbances
in a vacuum environment. I will start with a brief discussion
of vibration isolation by means of a passive resonant
system, illustrated with experimental data taken with
springs and elastomers. I will then show the vibration
level present on the floor of a good underground laboratory
environment, and the amount of suppression one achieves
with conventional optical tables. Next, I will show the
system we have built at NIST in order to prototype optical
interferometers in a high-vacuum environment. The environmental
isolation mechanisms are activated sequentially, in order
to illustrate the isolation achieved by each stage and
the compromises that some stages entail. This approach
helps to illustrate what fraction of the vibrations is
of acoustic origin and what fraction is seismic, and the
importance of controlling both is made manifest. Disturbances
are measured with both an accelerometer and a high-finesse
Fabry-Perot interferometer. One important conclusion of
this work is that the vibration imposed by a maglev turbomolecular
pump is easily controlled to the extent that it is unlikely
to contribute significantly to the ultimate vibration
of even a very quiet system.
It will be shown that our relatively simple system offers
vibration isolation not only vastly surpassing that
of a conventional floating optical table, but in fact
better than the ion-pumped NIST X-ray interferometer.
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