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Defense Intelligence Reference Document Pulsed High-Power Microwave Source Technology
Defense Intelligence Agency · 37 pages · text from the file's own layer
This Defense Intelligence Reference Document from the Defense Intelligence Agency, dated 28 January 2010, surveys pulsed high-power microwave (HPM) source technology. It was produced under the Advanced Aerospace Weapon System Applications (AAWSA) program. It covers insulation, cathode materials, high-voltage switching, pulse generators, microwave sources such as magnetrons, gyrotrons and the Phoenix and Jolt sources, and antennas. The document concludes that progress depends on advances in cathodes, switching and insulation. It says compact ultrawideband antennas will remain difficult to build.
“The Times”17 pages
- p. 6 …on the order of several hundreds of
kilovolts per meter with onset or rise times of…
- p. 7 …If the pulse duration is short compared with
thermal diffusion times, then the temperature increases in…
- p. 8 …The short burst mode operation is
necessary because of the high peak powers and subsequent heating…
- p. 17 …Second, it has a fast turn-on time. Third, the insulating nature of the velvet
fibers…
- p. 18 …As a result, the HPM emission times have been extended.
Typically, the cesium salt is dissolved…
- p. 19 …The period of the lowest frequency is twice the
pulse width, and the rise time is…
- p. 20 …Thus, the faster the rise time and the wider the pulse, the broader the spectral content…
- p. 21 …8FF11il.t.k WE&i a••k>/
rise time is the time required to heat the…
- p. 22 …The array can then be phased in time to allow steering of the
beam. GaAs switches…
- p. 24 …The explosives are then used to
compress the initial magnetic flux by driving the conducting cylinder…
- p. 26 …SPLIT-CAVITY OSCILLATORS
Split-cavity oscillators (SCOs) utilize transit-time bunching of the beam to generate…
- p. 28 …in the 3.5-ns-wide pulse is
1.25 GW, and the rise time is…
- p. 29 …Thus, for H3
the FOM is 250 kV. While developing the
H series of HPM sources…
- p. 30 …Phoenix had the fastest rise time of any HPM source to date. Figure 8 shows the…
- p. 32 …By timing the switching sequence of each BASS module, the beam
was steerable up to 30…
- p. 35 …Thus, if the
frequency chirps during the RF pulse,
then the beam direction will sweep. The…
- p. 36 …This is why the rise time
of the driving pulse is so important to antenna response…
28 January 2010
ICOD: 1 December 2009
DIA-08-0912-005
UNCLASSIFIED//POR: OPPIOliltL ~91!!! OFtLY
Defense
Intelligence
Reference
Document
Acquisition Threat Support
Pulsed High-Power Microwave
Source Technology
UNCLASSIFIEDf/FOR: OFFl@liltt ~!II! 8flt I
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Report, from the dia collection. The PDF is mirrored here; the original link is under it. 37 pages are in the text index: search them above, or from the library's search.