Tue, Dec 13, 2011 - Page 12 News List

Taiwanese team help in neutrino observatory plan

Staff Writer, with CNA

Huang Ming-huey, an associate professor at National Taiwan University, speaks during a press conference in Taipei yesterday to introduce the antennas used by his team in a collaboration with foreign researchers to launch the world’s largest neutrino observatory in Antarctica under the Askaryan Radio Array observatory project.

Photo: Liao Chen-huei, Taipei Times

Taiwanese researchers will collaborate with their counterparts in several countries to launch the world’s largest neutrino observatory in Antarctica in four years, a project that could help scientists better understand the origin of the universe, researchers said yesterday.

The NT$240 million (US$7.9 million) observatory, which will cover an area of 100km2, will involve universities in the US, Europe, Japan and Taiwan.

When completed, it will be much larger than the IceCube observatory, currently the largest neutrino detector in the world, with an area of 1km2.

This means that the new observatory will have a detection capacity 200 times that of the IceCube, the Taiwanese team said at a press conference in Taipei.

“The observatory will enable scientists to detect higher-energy neutrinos from distant galaxies,” said Huang Ming-huey (黃明輝), a professor and member of the research team, which has about 10 associates.

“These neutrinos can tell us what happened in the early universe and help us understand how the universe came into being,” he said.

Unlike the particles that make up light, radio waves and X-rays, neutrinos can penetrate anything, making them ideal for the observation of distant areas of the universe, Huang said.

Radio antennas are buried 200m deep in the Antarctic ice sheet at an elevation of 3,000m to measure the radio frequency of radiation emitted during the interaction of the neutrinos deep in the ice sheet.

The Taiwanese team, led by Chen Pi-sin (陳丕燊) from National Taiwan University (NTU), will provide 10 of the 37 antenna stations that will form the hexagonal observatory and will be responsible for the design and production of the antenna detectors.

The installation of the first station began early this month, with six more expected to be completed within the next two years by the Taiwanese team, Huang said.

Chen, who is currently in Antarctica taking part in the installation of the station, told the media through a video conference that the project was being carried out at the Antarctic “because the ice here is 3,000m thick.”

He said ice is an ideal medium for the detection of neutrinos.

However, he said the extremely cold weather has been the biggest challenge for the researchers.

After the observatory is completed, the team will spend at least five to 10 years collecting data, Chen said.

“We hope to make some discoveries,” he added.

The Askaryan Radio Array observatory project began in 2009. Taiwan’s government-operated National Science Council and NTU’s Leung Center for Cosmology and Particle Astrophysics are co-funding the Taiwanese contribution.

The Leung Center for Cosmology and Particle Astrophysics was established in 2007 by a donation of NT$205 million from C.C. Leung (梁次震), founder and vice chairman of Quanta Computer Inc (廣達電腦), the world’s largest contract notebook PC maker.

Leung was Chen’s classmate in the NTU physics department. While a student at NTU, Leung set up an astronomy club with his classmates because of his strong interest in astrophysics and high energy physics.

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