Lighten Up

U.S. Army officials so far have balked at deploying an experimental laser weapon to guard against insurgents' mortar and rocket fire in Iraq, the system's builder said Wednesday.

...the Tactical High-Energy Laser, or THEL...a short-range air defense system made up of several components, is the laser weapon closest to possible use in the field. It ties an advanced radar that detects and tracks incoming rockets to a chemically-generated high-power beam that destroys them. The system's development was jointly funded by the U.S. Army and the Israeli Ministry of Defense.

...In tests at the White Sands Missile Range in New Mexico, THEL has destroyed 46 targets in flight, including mortar rounds fired singly and in salvos, artillery shells and rockets, Northrop officials said. A target is zapped by the real-life equivalent of a Star Trek-like beam of light. The highly focused beam, generated by a mix of hydrogen fluoride and deuterium fluoride, focuses enough energy to heat the target until it explodes in mid-air.

Stephenson, vice president of Northrop's new "Directed Energy Systems" business area, said the Army pulled the plug late last year on plans to develop a mobile version of THEL on the grounds it would be too bulky.

Since then, Los Angeles-based Northrop has designed a second-generation, "relocatable" system that's about one-quarter the size of the one now at White Sands, New Mexico, with the same capability, he said.

The "relocatable" system could be deployed within two years at about $25 million apiece from the 30th unit if the Army were to buy that many of them, he said.

"We're at a tipping point, so to speak, with chemical lasers, as it applies to ground-based" systems, Stephenson said.

Northrop Grumman is making progress on electric lasers, also known as solid-state lasers, which lag their chemical cousins for now, he said. Ultimately, these may be the Army's weapon of choice because they run on diesel-fueled generators, doing away with chemical supply lines, Stephenson said.

The Pentagon's Missile Defense Agency is using Northrop chemical-laser technology for an airborne laser to be mounted on a specially designed Boeing Co. 747. The aircraft would be used to shoot down ballistic missiles during their "boost" phase, or shortly after launch.

Overall, the United States plans to spend $7.2 billion on high-energy laser-related military projects from 2006 to 2011, including $5.2 billion for the airborne laser, according to figures from President Bush's proposed 2006 budget culled by Phillip Brown, laser systems marketing manager for Northrop's Space Technology business unit.

Thanks to Defense Tech for the link.