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Scientific Discovery through Advanced Computing - Fusion
Simulation Prototype Centers

Published on AidPage by IDILOGIC on Jun 24, 2005
Administered by:

Department of Energy, All Departmental Locations, All DOE Federal Offices
(see all US Federal Agencies)

Explore all postings for this grant program:
  • Original Grant - Jan 14, 2005
Applications Due:

Mar 23, 2005
A Letter-of-Intent (LOI) to submit an application is REQUIRED and should be submitted by February 23, 2005. Failure to submit a Letter-of-Intent by an applicant may preclude the full application from due consideration.

total funding: $1,200,000
max award: none
min award: none
cost sharing, matching: No
number of awards: 2
type of funding: Cooperative Agreement
Description:

The SciDAC Program, the Office of Fusion Energy
Sciences (OFES) and the Office
of Advanced Scientific Computing Research (OASCR) of the Office of Science
(SC), U.S. Department of Energy (DOE), hereby announce their interest in
receiving cooperative agreement applications for the development of
specific
scientific simulation codes that can become components of an integrated
fusion
plasma simulation. These integrated fusion plasma simulation prototype
codes
should focus on the development of new capabilities that couple together a
wider range of physical phenomena in an integrated package of simulation
codes
(or code suite) than is currently being done.

The SciDAC Program, the Office of Fusion Energy Sciences and the Office of
Advanced Scientific Computing Research are planning a multi-institutional
Fusion Simulation Project (FSP) to develop an advanced integrated
simulation
capability for both existing magnetic fusion experiments and
next-generation
burning plasma experiments such as the International Thermonuclear
Experimental
Reactor (ITER). As a first step toward the initiation of the FSP, SciDAC,
OFES
and OASCR are seeking focused integration initiatives in topical areas that
are
particularly important to ITER. The goal of each initiative is to develop
an
integrated predictive modeling capability for a specific topical area
while, at
the same time, dealing with the integration issues that will be faced by
the
FSP. The experience with mathematical tools, innovative algorithms and
high-
performance computer architectures that is gained during these initiatives
will
be important in later phases of the FSP. Thus, close collaboration among
fusion
scientists, applied mathematicians and computer scientists is essential for
the
success of this initiative. The specific areas of interest are:

1) An integrated simulation of the edge/boundary region of a fusion plasma:
The
plasma edge is defined as the region from the top of the pedestal-a narrow
region in the outer part of plasmas in high confinement regimes just inside
the
separatrix, characterized by sharp temperature and density gradients-to the

material wall. The properties of the plasma edge have a strong influence on

core confinement and, hence, on the overall performance of the device. In
addition, edge conditions have a strong impact on power and particle
exhaust
and fueling and determine the level of plasma-wall interactions. The
multitude
of physical processes affecting the properties of the plasma edge
(turbulent
and collisional transport, MHD, stochasticity, interactions with neutral
atoms,
molecules and impurities, plasma-wall interactions including sheath
effects)
with their different spatiotemporal scales evolving on complicated magnetic

geometries, make predictive modeling of this region especially challenging
and
most likely to benefit from an integrated simulation.

A specific topic that should be addressed by an edge initiative is the
self-consistent simulation of a full Edge Localized Mode (ELM) cycle and
its
effect on the pedestal formation, dynamic evolution and characteristics,
such
as width and height. Applications should address all relevant physical
processes on all spatiotemporal scales, except for interactions with
material
walls. The formalism should be valid for the expected range of
collisionality
in present and next-generation experiments from the top of the pedestal to
the
material wall. This would require extending the present generation of
gyrokinetic equations and codes to edge-relevant regimes and developing
techniques to bridge the expected collisionality range.

2) An integrated understanding of how electromagnetic waves affect plasma
profiles and plasma stability: Experiments over the past 20 years have
shown
that electromagnetic waves can provide local heating and current drive in
plasmas, which in turn can affect the equilibrium, stability, and transport

properties of a magnetically confined plasma. Localized wave driven
currents
have been produced by a wide variety of plasma waves, including electron
cyclotron waves, lower hybrid waves, and ion cyclotron frequency waves, and

several validated, quantitative current drive simulation codes have been
developed. Further, stabilization of magnetohydrodynamic (MHD) modes and
modification of plasma flows have been observed in experiments using
radio-frequency waves. At the present time, the development of integrated
simulation codes and the required physical models and algorithms is at the
conceptual stage. The primary goal of this focused integration initiative
is to
understand how electromagnetic waves affect MHD stability of a fusion
plasma
and how these effects can be used to optimize the performance of a burning
plasma.

A specific product of this focused integration initiative would be a suite
of
simulation codes that self-consistently couples the time evolution of the
plasma equilibrium with the wave-driven modifications of the current,
temperature, and flow profiles and includes the analysis of stability
limits.
Since one objective of this initiative is integration, existing codes or
code
modules may be used where appropriate. For example, an existing transport
code
could be used to evolve the plasma profiles and equilibrium. However, since
a
number of new codes or code modules will be needed, it is expected that the

software and algorithm development environment and the code framework will
be
flexible enough to facilitate recombining of software components into new
code
capabilities as additional physics is added to the mathematical models.
This
code suite should be benchmarked against profile control experiments with
pulse
lengths that are long compared to the magnetic field diffusion times. Such
an
integrated simulation capability will allow the development of optimized
burning plasma scenarios.

Who can apply:

Unrestricted

Eligible functional categories:
Funding Sources:

Office of Science Financial Assistance Program

More Information:

Click
here to view the Opportunity

If you have problems accessing the full announcement, please contact: Laura Scott
If you have problems accessing the full announcement, please contact: using this
link

Address Info:

U.S. Department of Energy, Headquarters Procurement
Services Office, 1000 Independence Ave. SW, Washington, DC
20585

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