73 research outputs found
Aircraft design at the Naval Postgraduate School - Tactical waverider/long-range cargo aircraft
Aircraft Design, Systems, and Operations Meeting, 09 August 1993 - 11 August 1993The article of record as published may be located at https://doi.org/10.2514/6.1993-4007The graduate program of the Department of Aeronautics and Astronautics at the Naval Postgraduate School uniquely supports a comprehensive design program in aircraft, spacecraft, missile, helicopter, and engine design. This paper is focused on four aircraft configuration designs proposed by AA 4273 Military Aircraft Design course team members. The AA 4273 course is, in turn, supported by a growing research program to enhance and further develop the methodology of aircraft design. This design effort has received considerable support from the NASA/USRA Advanced Design Program in Aeronautics. Specifically, two design solutions for a long-range,carrier based, tactical, wave-rider configured fighter/interceptor aircraft are reviewed herein, as are two solutions for a global range military transport. Both types of aircraft were developed as a graduate student team response to specific design RFPs
Millimeter-Wave Polarimeters Using Kinetic Inductance Detectors for TolTEC and Beyond
Microwave Kinetic Inductance Detectors (MKIDs) provide a compelling path
forward to the large-format polarimeter, imaging, and spectrometer arrays
needed for next-generation experiments in millimeter-wave cosmology and
astronomy. We describe the development of feedhorn-coupled MKID detectors for
the TolTEC millimeter-wave imaging polarimeter being constructed for the
50-meter Large Millimeter Telescope (LMT). Observations with TolTEC are planned
to begin in early 2019. TolTEC will comprise 7,000 polarization sensitive
MKIDs and will represent the first MKID arrays fabricated and deployed on
monolithic 150 mm diameter silicon wafers -- a critical step towards future
large-scale experiments with over detectors. TolTEC will operate in
observational bands at 1.1, 1.4, and 2.0 mm and will use dichroic filters to
define a physically independent focal plane for each passband, thus allowing
the polarimeters to use simple, direct-absorption inductive structures that are
impedance matched to incident radiation. This work is part of a larger program
at NIST-Boulder to develop MKID-based detector technologies for use over a wide
range of photon energies spanning millimeter-waves to X-rays. We present the
detailed pixel layout and describe the methods, tools, and flexible design
parameters that allow this solution to be optimized for use anywhere in the
millimeter and sub-millimeter bands. We also present measurements of prototype
devices operating in the 1.1 mm band and compare the observed optical
performance to that predicted from models and simulations.Comment: 7 pages, 4 figures, 1 table. Submitted to Journal of Low Temperature
Physic
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