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2Physics Quote:
"Many of the molecules found by ROSINA DFMS in the coma of comet 67P are compatible with the idea that comets delivered key molecules for prebiotic chemistry throughout the solar system and in particular to the early Earth increasing drastically the concentration of life-related chemicals by impact on a closed water body. The fact that glycine was most probably formed on dust grains in the presolar stage also makes these molecules somehow universal, which means that what happened in the solar system could probably happen elsewhere in the Universe."
-- Kathrin Altwegg and the ROSINA Team

(Read Full Article: "Glycine, an Amino Acid and Other Prebiotic Molecules in Comet 67P/Churyumov-Gerasimenko"

Monday, March 12, 2007

Interferometric Detection of Gravitational Waves:
5 Needed Breakthroughs -- Seiji Kawamura

Seiji[ In our ongoing feature '5-Breakthroughs', so far most of our guests were from the exciting field of research on detection of gravitational waves. It started with David Shoemaker of LIGO and we also had Jean-Yves Vinet from French-Italian Virgo project and David Blair of the Australian effort, AIGO. Our today's guest is Prof. Seiji Kawamura of the Japanese endeavor, TAMA.

Seiji Kawamura is an associate professor at National Astronomical Observatory(NAO) at Mitaka, Tokyo, Japan. He was involved in joint Caltech-MIT LIGO project from its early days and worked on the 40m prototype interferometer (at Caltech), suspension system, and advanced R&D for the LIGO project between 1989 and 1997.

In 1997 he joined the TAMA project, the Japanese 300 meter interferometer for the detection of gravitational waves. As the leader of the detector group, he could lead TAMA to attain the world-best sensitivity at that time.

In addition he initiated and has been in charge of the resonant sideband extraction experiment, quantum non-demolition experiment, super-high frequency gravitational wave detection, and displacement-noise-free interferometer. He also leads the Japanese space gravitational wave antenna DECIGO.

Here is Seiji's list of 5 breakthroughs he would like to see in the ongoing worldwide effort to detect gravitational waves using interferometric antennas.
-- 2Physics.com Team]

"- homodyne detection with ponderomotive squeezing to suppress radiation pressure noise

- high-power laser to suppress shot noise

- cryogenic mirror/suspension to suppress thermal noise

- interferometer in space to remove seismic noise and to enhance gravitational wave signals

- displacement-noise-free interferometer to cancel all kinds of displacement noise"

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