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radiation News
Astrophysicist Named Purdue's 1st Woman President
WEST LAFAYETTE, Ind., May 8, 2007 -- An internationally recognized astrophysicist was named yesterday as the 11th president of Purdue University and the first woman to hold the post. Following a seven-month search, France Córdova was appointed by Purdue's board of trustees Monday as the first woman president since the university's founding in 1869. She is currently chancellor of the University of California, Riverside, where she also teaches astrobiology. Córdova replaces the retiring Martin C. Jischke; her start date has yet...
Nanosensor Promising for Space Research
DELFT, Netherlands, Jan. 19, 2007 -- By detecting the terahertz frequencies contained in cosmic radiation, a tiny but supersensitive sensor may help solve the mysteries of outer space, its creator said. Cosmic radiation offers astronomers important new information about the birth...
Geologists: Black Diamonds Come From Outer Space
UPTON, N.Y., Jan. 12, 2007 -- Using infrared synchrotron radiation, geologists have discovered that Earth's so-called black diamonds originated in interstellar space. Scientists Jozsef Garai and Stephen Haggerty of Florida International University, along with researchers...
A Laser’s Force Dampens Cantilever Action
Jan 1, 2007 — David M. Weld and Aharon Kapitulnik of Stanford University in California recently demonstrated that even low-power lasers pack a punch. Using laser-driven radiation pressure force-feedback, they reduced the effective quality factor and temperature...
Researchers Seek to Integrate THz Detectors and Electronics
BUFFALO, N.Y., Oct. 11, 2006 -- Sensors and detectors that work in the terahertz range show promise in applications ranging from precise identification of concealed weapons to the ability to distinguish between different tissue types for disease screening, but signals in that...
'Big Bang' Research Wins Physics Nobel Prize
STOCKHOLM, Sweden, Oct. 3, 2006 -- Two US scientists today received the 2006 Nobel Prize in Physics for their work, which analyzed background radiation left from the beginnings of the universe and provided researchers with a better understanding of the origin of galaxies and stars....
Schott Begins Manufacturing Solar Receivers
Sep 26, 2006 — International technology company Schott AG of Mainz, Germany, inaugurated a production plant for manufacturing solar receivers at its site in Mitterteich, Bavaria, today. "Receivers are a key component of the solar thermal parabolic trough power...
Laser's Particle Analog Demonstrated
UPTON, N.Y., Sept. 13, 2006 -- Particle acceleration by stimulated emission of radiation (PASER), a sort of particle analog of the laser process, has been demonstrated for the first time by a team of physicists, according to the American Institute of Physics (AIP). In a...
Berkeley Lab Names New Advanced Light Source Director
BERKELEY, Calif., Aug. 16, 2006 -- Roger Falcone, a physicist whose specialty is the use of ultrafast pulses of x-ray and laser light to study phenomena in condensed matter, molecular and atomic physics, has been named the new director of the Advanced Light Source (ALS) at Lawrence...
Space Pioneer, Physicist James Van Allen Dies at 91
IOWA CITY, Iowa, Aug. 9, 2006 -- Physicist James A. Van Allen, a US space pioneer who discovered the bands of intense radiation surrounding the Earth that now bear his name, died this morning at the age of 91. A statement about Van Allen's death was released today by the...
Simple Wavelength Meter Has Picometer Resolution
Aug 1, 2006 — There are many occasions in telecom, optical sensing and other applications when it is necessary to measure the spectral parameters of an unknown signal. Techniques of varying sophistication are used to carry this out in optical spectrum analyzers,...
The Color Purple: It Takes Three Photons
Aug 1, 2006 — Radiation in the violet and ultraviolet wavelength ranges is important for photolithography and fluorescence imaging, for future methods of three-dimensional optical storage and for other applications. There are several with which to generate this...
Shocked Crystals May Emit Coherent T-Rays
Feb 1, 2006 — Numerical experiments indicate that mechanically shocking crystalline materials may cause them to generate coherent radiation in the 1- to 100-THz frequency range, potentially enabling the development of novel sources of terahertz rays for medical...
News Briefs
Dec 7, 2005 — Spire Corp. was awarded a $750,000 Phase II Small Business Innovative Research (SBIR) project from the Department of Homeland Security Advanced Research Projects Agency to develop a terahertz-based standoff detection imager. The imager will emit...
Looking at Clouds from Both Sides Now
Nov 1, 2005 — Clouds, as Joni Mitchell sang, get in the way. They block incoming sunlight and outgoing radiation, playing key roles in weather and in the transfer of heat in the atmosphere. They also influence optical communications and affect the availability of...
Photoresist Replicates Transmission Through Nanoholes
Jul 1, 2005 — A team of investigators at Indiana University in Bloomington has developed a technique for mapping the 3-D spatial distribution of radiation transmitted through nanoscale apertures in which the transmission is preserved as a polymer replica in a...
With Polarization Studies, Astronomers Creep Closer to Black Holes
Jan 1, 2005 — By measuring the polarization of radiation from distant objects to an accuracy of better than 1/20 of a percent, astronomers have pushed their observations perhaps 100 times closer to the edge of a black hole than previously had been accomplished....
High-NA Fibers Enable High-Power Lasers
May 1, 2004 — A research group at the University of Bath in the UK has analyzed and demonstrated techniques to fabricate photonic crystal fibers (PCFs) with a numerical aperture as high as 0.9. The techniques may dramatically affect the efficiency and power of...
Low-Temperature Measurement of Shiny Metals
Feb 1, 2004 — Understanding and controlling the temperature of metals at all times during the manufacturing process is paramount if companies are to deliver products that are ever stronger and lighter. With new, unoxidized metals, the emissivity or radiation...
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