INTERNATIONAL GATHERING AT UH EXAMINES
TOP COMPUTER CODE
FLUKA© Holds Keys to Use of Radiation in Space Exploration,
Cancer Treatment
HOUSTON, Dec. 20, 2004 – Don’t let the odd name fool
you – FLUKA© is serious stuff. It’s a computer
program used by physicists to simulate the effects of various forms
of radiation as it passes through things.
A course on FLUKA, one of the top radiation transport computer
codes in the world, is coming to the University of Houston Jan.
10-14, 2005.
Called a Monte Carlo Radiation Transport Code because of how it
uses random numbers – like rolls of the dice – to simulate
the statistical effects of radiation transport, FLUKA has applications
in the aerospace and health industries. This conference marks only
the second time that a formal FLUKA course has been held. Its architects
will be at UH in the Texas Learning and Computation Center in Philip
G. Hoffman Hall.
“Our environment is constantly being bombarded by radiation
– billions of particles that span the spectrum in energy from
those that are unable to penetrate the skin to those that are capable
of penetrating miles of rock,” said Lawrence S. Pinsky, chairman
of the department of physics at UH and organizer of the five-day
FLUKA course. “While most of the radiation in our everyday
environment is something that our bodies have learned to live with,
special conditions such as exposure to medical diagnostic and therapeutic
uses or industrial and research uses are situations where care has
to be taken to understand the effects and minimize exposures with
shielding where it is appropriate.”
FLUKA works by simulating a particular environment in great detail.
For example, full-body CT scans are used to assemble very precise
models of the entire human body. Researchers use the laws of modern
physics to follow the path of particles in computer simulations,
predicting the distribution of how these particles interact with
the matter they encounter.
Another medical application of FLUKA is the planning and evaluation
of radiation therapy for the treatment of tumors.
“Not only can FLUKA be used to determine the therapeutic
dose delivered to the tissue of interest in the body, but it also
can be used to assess the collateral exposure to the surrounding
tissue, so that treatment plans can be optimized,” Pinsky
said.
One of the greatest challenges facing researchers is to protect
astronauts from the radiation environment in space.
“At the surface of the Earth, we are protected from the most
harmful sources of cosmic radiation by the effects of the Earth’s
magnetic field and the thickness of our atmosphere,” Pinsky
said. “In space beyond the Earth’s atmosphere, the radiation
environment is significantly more intense.”
As human space exploration ventures farther from Earth for longer
periods, stronger and lighter shielding materials for spacecraft
must be developed to protect astronauts from the harmful effects
of this radiation. To give shielding recommendations, certain calculations
must be employed. These shielding calculations also can be used
for nuclear reactors and accelerators, and FLUKA is the most widely
used and trusted computer code to do this.
Along with UH and NASA, the course is being sponsored by the European
Organization for Nuclear Research (CERN), which is the world’s
largest particle physics lab where physicists go to explore the
make up of matter and forces holding it together, and the National
Institute of Nuclear Physics (INFN), the Italian funding agency
for nuclear physics.
Physicist Johann Ranft at the University of Leipzig in Germany
originally developed FLUKA in the 1960s while he was working with
CERN. By the late 1980s, the code had evolved through two generations,
and Ranft turned over the continuing development and modernization
of the code to a group of physicists at the INFN, who work with
Alfredo Ferrari, who also is a senior physicist at CERN. The present
version of FLUKA is the product of this team of authors.
Following the course held at UH, FLUKA’s source code will
be available for the first time to scientists under a special license
agreement between CERN and INFN. CERN has officially recognized
FLUKA as a CERN-supported code and is now supplying support for
manpower to continue the development of the code into the future.
In an ongoing collaboration between UH and NASA, with the support
of UH’s Dave Criswell, director of the Institute for Space
System Operations, UH will provide a version of FLUKA to NASA for
use in simulating the space radiation environment inside spacecraft,
on the moon and on the surface of Mars.
“These modified codes will be used to help design the shielding
materials used to construct the spacecraft that will carry men and
women back to the moon and on to Mars,” Pinsky said.
Last January, President Bush mentioned the effects of space radiation
as one of the crucial problems that has to be overcome for the progress
of these types of future projects. UH’s ongoing collaborations
with NASA and the architects of FLUKA are vital for this success.
For more information about the FLUKA course and for registration
information, visit www.fluka.org.
About the University of Houston
The University of Houston, Texas’ premier metropolitan research
and teaching institution, is home to more than 40 research centers
and institutes and sponsors more than 300 partnerships with corporate,
civic and governmental entities. UH, the most diverse research university
in the country, stands at the forefront of education, research and
service with more than 35,000 students.
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