A millimeter-wave traveling wave tube (TWT) was developed using a dispersive, high-impedance forward wave interaction structure based on a ladder, with non-space-harmonic interaction, for a tube with high gain per inch and high efficiency. The 'TunneLadder' interaction structure combines ladder properties modified to accommodate Pierce gun beam optics in a radially magnetized PM focusing structure. The development involved the fabrication of chemically milled, shaped ladders diffusion brazed to diamond cubes which are in turn active diffusion brazed to each ridge of a doubly ridged waveguide. Cold-test data, representing the (omega)(beta) and and impedance characteristics of the modified ladder circuit, were used in small and large-signal c...
A computational model based on the axisymmetric, thin-layer Navier-Stokes equations is developed to ...
An investigation was made to determine the feasibility of using an aerobrake system for manned and u...
This paper aims at introducing cryogenics to non-specialists. It is not a cryogenics course, for whi...
A proposal was made at the end of 1996 to use the large inventory of RF hardware available after the...
Major obstacles to the use of NiAl-based alloys and composites are low ductility and toughness. Thes...
This research project proposes to develop, integrate and characterize a nebulizer system for the nas...
The Remote Field Eddy Current (RFEC) technique is ideal for inspecting unpiggable pipelines because ...
Gas atomized magnesium powders are critical for the production of a wide variety of flares, tracer p...
A limited number of coating options for titanium gas turbine engine components were explored with th...
This NASA Innovative Advanced Concept (NIAC) grant has enabled the research and development of a met...
A high-performance constant-temperature hot-wire anemometer has been designed based on a system theo...
Previous work on efficiency of light injection into the core of a fiber from a thin film and a bulk ...
Numerous studies have examined the electrochemical reduction of CO (COR) to oxygenates (e.g., ethano...
Faster circuits require not only research in next generation devices but careful consideration of si...
Control of zeolite external surface hydrophobicity was achieved by covalently bonding organosilane m...
A computational model based on the axisymmetric, thin-layer Navier-Stokes equations is developed to ...
An investigation was made to determine the feasibility of using an aerobrake system for manned and u...
This paper aims at introducing cryogenics to non-specialists. It is not a cryogenics course, for whi...
A proposal was made at the end of 1996 to use the large inventory of RF hardware available after the...
Major obstacles to the use of NiAl-based alloys and composites are low ductility and toughness. Thes...
This research project proposes to develop, integrate and characterize a nebulizer system for the nas...
The Remote Field Eddy Current (RFEC) technique is ideal for inspecting unpiggable pipelines because ...
Gas atomized magnesium powders are critical for the production of a wide variety of flares, tracer p...
A limited number of coating options for titanium gas turbine engine components were explored with th...
This NASA Innovative Advanced Concept (NIAC) grant has enabled the research and development of a met...
A high-performance constant-temperature hot-wire anemometer has been designed based on a system theo...
Previous work on efficiency of light injection into the core of a fiber from a thin film and a bulk ...
Numerous studies have examined the electrochemical reduction of CO (COR) to oxygenates (e.g., ethano...
Faster circuits require not only research in next generation devices but careful consideration of si...
Control of zeolite external surface hydrophobicity was achieved by covalently bonding organosilane m...
A computational model based on the axisymmetric, thin-layer Navier-Stokes equations is developed to ...
An investigation was made to determine the feasibility of using an aerobrake system for manned and u...
This paper aims at introducing cryogenics to non-specialists. It is not a cryogenics course, for whi...