University Awarded $1 Million by Keck Foundation to Study Cosmic Rays

Artists conception of a cosmic ray, originating in a 'jet' from an active galaxy, colliding with the Earth's atmosphere and creating an extensive air shower. Photo Credit: Courtesy of the Science Photo Library website.

Grant Will Assist Researchers in Developing New Radar Technique to Study Origin, Energy, & Composition of Universe’s Most Energetic Particles

Full press release here

Sept 19, 2012 – The University of Utah today announced that the W.M. Keck Foundation awarded $1 million to university researchers to study high-energy cosmic rays in Utah’s western deserts that are hurtling their way toward Earth. These rays — 10 trillion times more energetic than particles emitted in a nuclear explosion — originate from violent cosmic events deep within the universe.

 

 

The Keck grant will assist a team of researchers in developing a new tool for understanding how the universe evolved. Employing a technique known as “Bistatic Radar,” researchers will attempt to use analog television transmitters and high-speed digital receivers to observe the range, direction and strength of high-energy particles in order to track these rays back to their point of origin. Bistatic Radar will be much less expensive than traditional cosmic ray detection techniques, which employ surface radiation detectors covering thousands of square kilometers of the Earth’s surface and cost tens of millions of dollars.

 


Schematic showing "air shower" of particles generated when cosmic ray interacts in the Earth's atmosphere. Common secondary particles such as neutrons, pions, electrons and gamma rays are included in the illustration. Photo Credit: Courtesy of UDelaware website.

The new facility created under the auspices of this grant will be known as The W.M. Keck Radar Observatory. The Keck Radar Observatory will be located in Millard County Utah, where it will initially be co-located with Utah’s Telescope Array, currently the largest “conventional” cosmic ray observatory in the Northern Hemisphere. This will enable comparison of the Keck Observatory’s findings with those of a conventional observatory on an event-by-event basis and allow for the evaluation of radar scattering models.

 

Utah’s western deserts offer low levels of light pollution and atmospheric aerosols, making Utah an ideal location for detecting and studying cosmic rays. In addition, Utah’s deserts are highly “radio-quiet” with low levels of human-generated high-frequency interference, which makes it uniquely suitable for tests of the radar technique.

 


John Belz, Research Associate Professor & Radar Project Director

“We are at the frontier in our understanding of the origin of the universe’s most energetic particles,” said John Belz, radar project director and research associate professor of physics and astronomy at the University of Utah. “These particles are hundreds of thousands of times more energetic than particles emitted from supernova explosions. Our main goal is to understand the origins of these rare cosmic rays, in order to gain a better understanding of some of the most violent processes shaping the universe.”

 

In 1912, Victor Hess discovered cosmic rays, which since have been determined to be subatomic particles and radiation of extra-terrestrial origin. In 1991, the University of Utah’s Fly’s Eye Cosmic Ray Detector in Utah’s Dugway Proving Ground recorded the highest energy elementary particle ever observed. This particle was believed to be a proton traveling close to the speed of light and initiated a search for cosmic origins that continues to this day. High-energy cosmic particles are rare. A square mile of the Earth’s surface might be impacted by one of these particles roughly once a century.

 


Computer simulation of air shower created by a cosmic ray proton interacting in the atmosphere, superimposed on an urban area for scale. Photo Credit: Courtesy of Wikipedia.

Other University of Utah researchers taking part in the study include: Pierre Sokolsky, professor in the Department of Physics and Astronomy and Dean of the College of Science; Behrouz Farhang-Boroujeny, professor and associate chair of the Department of Electrical and Computer Engineering; and Gordon Thomson, the Jack W. Keuffel chair in experimental astrophysics at the Department of Physics and Astronomy. Investigators from other institutions include David Besson, professor in the Department of Physics and Astronomy at the University of Kansas; and Helio Takai, physicist at the Brookhaven National Laboratory.

 

About the W.M. Keck Foundation

 


Computer simulation of air shower created by a cosmic ray, illustrating shower development and the large number of secondary particles. Photo Credit: Fabian Schmidt.

Based in Los Angeles, the W. M. Keck Foundation was established in 1954 by the late W. M. Keck, founder of the Superior Oil Company.  The Foundation’s grant making is focused primarily on pioneering efforts in the areas of medical research, science and engineering and undergraduate education.  The Foundation also maintains a Southern California Grant Program that provides support for the Los Angeles community, with a special emphasis on children and youth.  For more information, please visit www. wmkeck.org.

 

About the University of Utah

The University of Utah, located in Salt Lake City in the foothills of the Wasatch Range, is the flagship institution of higher learning in Utah. Founded in 1850, it serves more than 31,000 students from across the United States and the world. With more than 72 major subjects at the undergraduate level and more than 90 major fields of study at the graduate level, including law and medicine, the university prepares students to live and compete in the global workplace.