The Askaryan Radio Array (ARA) is a new detector designed to detect a few GZK neutrino

Neutrino

A neutrino is an electrically neutral, weakly interacting elementary subatomic particle with a half-integer spin, chirality and a disputed but small non-zero mass. It is able to pass through ordinary matter almost unaffected...

s a year. It measures the enhanced radio-frequency radiation

Radio Wave

Radio Wave may refer to:*Radio frequency*Radio Wave 96.5, a radio station in Blackpool, UK...

 emitted during the interaction of the neutrino in Antarctic ice sheet

Antarctic ice sheet

The Antarctic ice sheet is one of the two polar ice caps of the Earth. It covers about 98% of the Antarctic continent and is the largest single mass of ice on Earth. It covers an area of almost 14 million square km and contains 30 million cubic km of ice...

. The detection is based on the Askaryan effect

Askaryan effect

The Askaryan effect is the phenomenon whereby a particle traveling faster than the phase velocity of light in a dense dielectric produces a shower of secondary charged particles which contain a charge anisotropy and thus emits a cone of coherent radiation in the radio or microwave part of the...

, an idea by Gurgen Askaryan

Gurgen Askaryan

Gurgen Askaryan was a prominent Soviet physicist, famous for his discovery of the self-focusing of light, pioneering studies of light-matter interactions, and the discovery and investigation of the interaction of high-energy particles with condensed matter...

 

This detection technique is also being used by the Antarctic Impulse Transient Antenna

ANtarctic Impulse Transient Antenna

The AA experiment has been designed to study ultra-high-energy cosmic neutrinos by detecting the radio pulses emitted by their interacting with the Antarctic ice sheet...

 (ANITA) and the Radio Ice Cerenkov Experiment

Radio Ice Cerenkov Experiment

Radio Ice Cerenkov Experiment is an experiment designed to detect the Cherenkov emission in the radio regime of the electromagnetic spectrum from the interaction of high energy neutrinos with the Antarctic ice cap...

 (RICE) detectors. The ARA experiment will be built around the IceCube experiment, and will cover an area of approximately 100 square kilometers.

Collaborators

• University of Delaware
  University of Delaware
  The university is organized into seven colleges:* College of Agriculture and Natural Resources* College of Arts and Sciences* Alfred Lerner College of Business and Economics* College of Earth, Ocean and Environment* College of Education and Human Development...
  
  
• University of Hawaii
  University of Hawaii
  The University of Hawaii System, formally the University of Hawaii and popularly known as UH, is a public, co-educational college and university system that confers associate, bachelor, master, and doctoral degrees through three university campuses, seven community college campuses, an employment...
  
  
• University of Kansas
  University of Kansas
  The University of Kansas is a public research university and the largest university in the state of Kansas. KU campuses are located in Lawrence, Wichita, Overland Park, and Kansas City, Kansas with the main campus being located in Lawrence on Mount Oread, the highest point in Lawrence. The...
  
  
• University of Maryland
  University of Maryland
  When the term "University of Maryland" is used without any qualification, it generally refers to the University of Maryland, College Park.University of Maryland may refer to the following:...
  
  
• University of Wisconsin
• Free University of Brussels
  Free University of Brussels
  The Free University of Brussels was a university in Brussels, Belgium. In 1969, it split into the Université Libre de Bruxelles and the Dutch-speaking Vrije Universiteit Brussel....
  
   (IIHE)
• The Ohio State University