March 13, 2023 | International, C4ISR
Pentagon seeks 21% boost in cyberspace spending
The fiscal 2024 budget blueprint arrives days after the Biden administration shared its latest national cybersecurity strategy.
June 17, 2019 | International, Other Defence
Enabling Revolutionary Nondestructive Inspection Capability
X-rays and gamma rays have a wide range of applications including scanning suspicious maritime shipping containers for illicit materials, industrial inspection of materials and processes, and medical diagnostic and therapeutic procedures. Current technologies, however, are not ideal. X-rays produce a continuum of energies that limit their inspection and diagnostic performance, and gamma rays can only be produced at specific energies unique to a given radioactive isotope.
DARPA today announced its Gamma Ray Inspection Technology (GRIT) program. GRIT seeks novel approaches to achieve high-intensity, tunable, and narrow-bandwidth sources of gamma ray radiation in a compact, transportable form factor that would enable a wide range of national security, industrial, and medical applications. A Proposers Day webinar describing the goals of the program is scheduled for July 8, 2019.
“What we're trying to do in GRIT is transform the use of x-rays and gamma rays,” said Mark Wrobel, program manager in DARPA's Defense Sciences Office. “Current sources of gamma rays, like Cobalt-60 or Cesium-137, are not very flexible. They require special licenses to possess and only emit gamma rays at very specific energies. What we desire is a source of very high-energy photons that we can tune to match the application we need. This ranges from more effective detection of illicit cargo, to a more informative medical x-ray.”
GRIT aims to provide a source of tunable, pure x-rays and gamma rays from tens of keV (kilo-electron volts) up through over ten MeV (mega-electron volts). Currently, tunable and narrow bandwidth gamma ray sources only exist at highly specialized user facilities best suited for basic research and are not able to support broad practical applications. Shrinking these photon sources to a transportable system is a major goal and challenge of the GRIT program.
GRIT technology could make possible a range of new inspection and diagnostic protocols. In medical and industrial radiography, for example, GRIT could enable revealing specific elemental and material content, such as calcium in bones or specific metals in cargo. A typical x-ray only shows differences in density in the object being inspected – whether a piece of luggage at an airport, or an individual at a doctor's office. If successful, a GRIT x-ray source could be tuned to detect and quantify the concentration of specific elements of interest, such as the amount of calcium in a given bone x-ray, enabling radiologists to actually see bone composition.
Tuning energy between 10s of keV to over 100 hundred keV would allow detection of specific elements that might be of interest in characterizing novel materials and processes at micron scales. These techniques would be relevant to defense applications including non-destruction inspection of novel additively manufactured materials and alloys for their elemental composition.
At energy levels in the MeV range, gamma ray photons have high enough energy to actually interact with the nuclei of atoms. Whereas x-rays work by interacting with the shells of atoms, GRIT would be able to stimulate the nucleus of an atom to bring about an effect called nuclear resonance fluorescence, a sort of “fingerprint” that is unique to each isotope on the periodic table.
“With GRIT, you could probe and detect specific isotopes of interest by fine-tuning the photon energy to minimize background noise and take advantage of the nuclear resonance fluorescence phenomenon,” Wrobel said. “Those isotopes could be rare-earth elements of interest or special nuclear materials. To be able to definitively say, ‘Yes, there's highly enriched uranium in this object' and be able to characterize how much is present would be a significant leap forward over our current capabilities.”
DARPA is seeking expertise in a range of technologies on the GRIT program including advanced accelerator technology, high-energy laser systems, novel control systems, and new x-ray and gamma ray detector technology. To register for the GRIT Proposers Day webinar, visit: https://go.usa.gov/xmh28.
GRIT's focus on new, compact photon sources for inspection complements DARPA's Intense and Compact Neutron Sources (ICONS) program, which is developing compact neutron sources. The two technologies would work in tandem, yielding a very robust inspection capability.
Caption: The Gamma Ray Inspection Technology (GRIT) program seeks tunable gamma ray sources for a host of national security, industrial, and medical applications.
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June 19, 2023 | International, Aerospace
Patria and Lockheed Martin have signed the first agreement within Finland´s F-35 direct industrial participation programme
The F-35's industrial participation solution in Finland creates strong competences via security of supply and is also significant for national economy
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December 19, 2018 | International, Land
Russia wants back in on India’s gun and missile system competition
By: Vivek Raghuvanshi NEW DELHI — Russia has lodged a protest over India's decision to disquality its two munitions systems from the $1.6 billion Army program, spurring newfound tensions between the two allies. During a meeting of the India-Russia Inter-Governmental Commission on Military Technical Cooperation in New Delhi Thursday, visiting Russia Defence Minister Gen. Sergei Shoigu made clear his displeasure about the upgraded Tunguska system and a system from Pantsir being kicked out of the pending program, a source from the India Ministry of Defence confirmed. In October, the Indian Army officially declared Hanwha Defense Systems of South Korea as the only qualified company for the gun and missile system program. In the 2013 global tender, Indian Army shortlisted three companies — Hanwha Defense Systems, which offered its Hybrid Biho system, and Russian companies Almaz Ante, which offered its upgraded Tunguska system, and KBP Tula, which offer its Pantsir system. During the IRIGC-MTC, Gen. Shoigu accused the Indian Army trial teams of purposely not completing the full trials last year. A Russian diplomat said on condition of anonymity that the two defense companies and the Russian defense ministry issued separate letters to MoD last month to reevaluate the entire selection process before making a final call. However, a senior Indian Army official said both the upgraded Tunguska system fielded by Almaz Ante and Pantsir by KBP Tula systems were not fully compliant during the trials. The program calls for procurement of five regiments, or 104 systems, of gun missiles systems, including 4,928 missiles and 172,260 rounds of ammunition costing $1.6 billion. The winner will have to provide full maintenance technology transfer for missiles to state-owned Ordnance Factory Board. The proposed gun and missile system should have a day and night camera functionality and a built-in simulator, and the gun should engage a target at 350 rounds per second, while the missile should have a range of five kilometers. The system should be able to operate up to 50 kilometers on a single fuel tank, and should have a minimum operation endurance of eight hours without refueling. The Indian Army is looking for a mix of both gun and missiles mounted on one or separate high mobility vehicles. In addition, the gun as well as the missile should be able to engage aerial targets both with and without the fire control radar, either independently or simultaneously. https://www.defensenews.com/global/asia-pacific/2018/12/18/russia-wants-back-in-on-indias-gun-and-missile-system-competition/