Documents / Official release
This Defense Intelligence Reference Document, DIA-08-1004-005, is dated 6 April 2010. The Defense Intelligence Agency's Defense Warning Office prepared it under the Advanced Aerospace Weapon System Applications program. It reviews proposed laboratory generators and detectors for high-frequency gravitational waves. It favors a piezoelectric approach for proof-of-concept tests, IR-excited molecules for an operational transmitter and the Li-Baker detector as the receiver. It estimates about 1.9 million bits per second over 7,000 km through the Earth and discusses timing standards and interplanetary navigation uses.
From the source:Release of 2026-09-18 Incident: 4/6/10, Las Vegas, Nevada. Released with redactions. This document is a Defense Intelligence Reference Document (DIRD), a technical reference format used by the Defense Intelligence Agency (DIA) to capture baseline knowledge on a specific topic for later analytic use. DIRDs are best understood as reference and synthesis products rather than as original research. It is one of 38 DIRDs produced under the Advanced Aerospace Weapon System Applications Program (AAWSAP) between 2009 and 2011. Because AAWSAP’s scope permitted a broad range of supporting topics, not every DIRD in the series directly concerns aerospace systems or future threat assessment. The following summary reflects the DIRD’s scope and framing at the time of writing and should not be read as implying current validation of the concepts discussed. This DIRD examines whether high-frequency gravitational waves could serve as a communications medium while avoiding the attenuation that limits radio-frequency systems. The report surveys proposed transmitter and detector concepts, argues that gravitational-wave communications could support secure point-to-point links, timing standards, and interplanetary navigation, and gives particular attention to laboratory generator concepts and the Li-Baker detector as possible building blocks for such a system. The document makes clear, however, that the entire concept depends on capabilities that had not been demonstrated in practice, including laboratory-scale generation and reliable detection of usable high-frequency gravitational-wave signals. It is an exploratory systems-oriented review built around a future communications concept.
“Cooper”1 page
UNCLASSIFIED//iiOlil OiiiilCI0L Llili QPIL¥ Appendix B: Li-Baker HFGW Detector Appendix B describes a joint academ ia/ind ustry project to design the ultra-high sensitivity Li - Baker detector for high-frequency gravitational waves (HFGWs). The partnersh ip consists of Louisiana State University (LSU) and Transportation Sciences Corporation (TSC) in California. The Li-Baker HFGW detector exploits a solution of field equations that couples photons and GW in first order, and the sensitivity of the detector will be much better than previously-proposed HFGW detectors. The outcome of this st udy will be an eng ineering -ready design for the HFGW detection system, to be developed under continued funding. Future construction of this detector will broaden the search spectrum of the existing UGO low frequency GW detection system; it will be used to detect and characterize the relic HFGW cosmolog ical background radiation, contributing to clarifying the origins of the universe. This offers the first and best hope of GW detection in a completely new GW frequency regime around 10GHz, near the cutoff of what is cosmically generated and a proof of the capability of the detector to sense the HFGW emissions of the HFGW generator discussed in Sections 4.4, 4.5 and 4.6. This first activity is to develop designs, plans and specifications for the Li-Baker configuration for ultra-high sensitivity detection of relic high-frequency gravitational waves (HFRGWs) in the laboratory. The first goal will be to develop the design to a stage where the likely performance can be evaluated in detail. Following a future proposal, the Li-Baker detector will subsequently be built and used for the basic-science purposes of sensing HFRGWs having their origin related to the "big bang," as well as for detecting laboratory-generated HFGWs (Romero and Dehnen, 1981; Baker, 1999, 2000; Woods and Baker, 2005, 2009). As discussed in Sections 4.4, 4.5 and 4.6 .Use will primarily be made of "off-the-shelf" components, and components described in the open scientific literature and in the various patents issued to Project Scientist Robert M L Baker, Jr. (Baker, 1999, 2000, 2001, and Patents Pending) who is the inventor of the Li-Baker HFGW Detector (Baker, 2001). Other components will be designed by the project participants during the Detector Design (DD) process. The project plan and timing are described below under separate headings for each component of the work. D01.1 Containment Vessel Design of the cryogenic containment vessel and vacuum system: Dr. R.C. Woods (LSU) + graduate student, G.V. Stephenson (TSC), Dr. R. M L Baker (TSC). This will be divided into four subtasks: DDl.1.1 Selection of material for the containment vessel: this choice will be made in light of the vessel's approximate size and shape, initially anticipated to be cyl indrical, overall approximately 2m diameter and 3m length. Manufacturing ultra-high vacuum chambers requires fabrication that ensures leak-free performance. For example, Meyer Tool & Manufacturing, Inc. (Oak Lawn, Illinois) supplies custom chambers for ultra-high vacuum (UHV) applications. Companies such as Meyer will be consulted and/or visited to evaluate their manufacturing capabi lity. The final selection from the expected short-list of titanium, stainless steel and/or aluminum containment vessels will be made based upon manufacturer recommendation and evaluation of test data. UNCLASSIFIED/ /FOR OiiiilCl.t.k HSI!! eflti 45
Not linked to a story yet.
Official release, from the pursue collection. The PDF is mirrored here; the original link is above. 57 pages are in the text index: search them above, or from the library's search.