The bandwidth and frequency enhancement of the free electron laser instability in a mildly relativistic (gamma or = 1.15) electron beam propagating through a dielectric loaded waveguide is presented. For an appropriate choice of the dielectric constant epsilon and the thickness of the dielectric material, it is shown that the instability bandwidth and frequency can be greatly enhanced for specified values of the beam energy and the wiggler wavelength. (Author)
Topics: DTIC Archive, Uhm,Han S, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD
An intense relativistic electron beam from the Naval Surface Weapons Center's Casino simulator has been transported 1.85 meters utilizing gradient-B drift in an applied magnetic field gradient produced by a straight wire. Transport efficiencies of 85-90% and beam risetime compression of up to a factor of two have been achieved routinely.
Topics: DTIC Archive, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *ELECTRON BEAMS, *MAGNETIC FIELDS,...
A multistage. command-fired, trigatron switch. intended for megavolt operation. has been designed. constructed. and tested. The gas switch incorporates a uniform field geometry. to lower pressure-gap spacing requirements; a unique cascading trigger scheme. to reduce closure jitter; and carbon electrode inserts. to lengthen operating lifetime. This paper presents the analysis used to determine switch jitter requirements. a description of the switch design. the switch tests performed and a...
Topics: DTIC Archive, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *SWITCHES, JITTER, TEST AND...
This report documents a computer program which simulates the beamforming process of a planar array. It uses the physical characteristics, electrical shading characteristics and other factors to obtain detailed information of theoretical beam structures. Amplitude and phase coefficients can be varied to study main and side lobe structures for steered/unsteered and/or spread/unspread beam patterns.
Topics: DTIC Archive, Roth,Edward J, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *COMPUTER PROGRAMS,...
A new method has been discovered for finding prime-rich equations of the type I=x-squared-x+c where c=2N-1 and N=1,2,3,..... It is based on an analysis of an array described in NSWC TR-85-120. The array can be defined by stating that all its columns are described by the above equations while simultaneously all its rows are described by the equations I=X-squared+x-r where r=2N-1 and N=1,2,3,..... Primitive cells and primitive cell arrays are derived from the above special array by determining...
Topics: DTIC Archive, Sery,R S, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *EQUATIONS, *PRIME NUMBERS,...
Ocean wave statistics were obtained from twenty recordings of fifteen minutes each. Spectral densities are presented together with amplitude distributions and the results are discussed in light revelant theories. In particular, it is shown that the sea surface fluctuation is a Gaussian statistic in the majority of cases; but that non-Gaussian fluctuations are observed from time to time.
Topics: DTIC Archive, Lee,D, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *OCEAN WAVES, DISTRIBUTION,...
A brief history of Class/Division 1.5/1.6 is presented. The protocol which has been developed and approved by the United Nations for testing these materials is presented. The results of testing to determine if certain substances are Extremely Insensitive Detonating Substances (DiDS) is presented.
Topics: DTIC Archive, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *INSENSITIVE EXPLOSIVES, HIGH...
This report describes the Naval Surface Weapons Center Technology Transfer Program and presents narrative summaries of related projects performed during FY85. Technology Application Assessments and a listing of patents/Navy cases for this time period are also presented. (Author)
Topics: DTIC Archive, Johnson,Ramsey D, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *TECHNOLOGY...
The gyrotron amplifiers in two slow wave structures, the disk and the helix loaded waveguides, are investigated for wide band applications. For each structure, properties of the vacuum waveguide mode are examined in connection with the gyrotron application, and the gyrotron dispersion relation is obtained. For the disk loaded gyrotron, it is found that the group velocity of the waveguide mode can be easily varied by the disk parameters, and the gain and the bandwidth are at least comparable to...
Topics: DTIC Archive, Choe,Joon Y, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *WAVEGUIDES, *MASERS,...
Li/SO2 batteries are used to provide power for an air deployable expendable store Photo Finish. This report presents results of a test program to determine if the system is safe for fleet use.
Topics: DTIC Archive, Bis, R. F., NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *LITHIUM, *SAFETY,...
The dispersion curves of the TE(O1) modes of dielectric clad waveguides were determined experimentally and compared with theory. Keywords include: Dielectric loaded waveguide; Resonant Cavity; Dispersion curves; and Mode identification.
Topics: DTIC Archive, Crosby,H, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *DIELECTRIC WAVEGUIDES,...
Stability properties of the negative-mass instability in a rotating annular electron beam (E-layer) is investigated, in connection with applications on the cusptron microwave tubes. Analysis is carried out for an infinitely long E-layer propagating through a magnetron-type conducting wall and propagating parallel to an applied axial magnetic field. We assume that the E-layer is thin and very tenuous. A closed algebraic dispersion relation of the negative-mass instability is obtained, including...
Topics: DTIC Archive, Uhm,Han S, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *MICROWAVE EQUIPMENT,...
Available data from four different gap tests were compared. The study indicated a linear relation between the critical gap lengths (50% point) of the NOL LSGT and those of each of the other three tests, hence a linear relation for any pair of the 4 tests. On the other hand, the approximate equivalency curve between the 50% gaps of the NOL LSGT and those of the recently developed expanded LSGT has been drawn with some curvature. The reasons for this are presented, and the detonation properties...
Topics: DTIC Archive, Price, Donna, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *EXPLOSIVES, *SHOCK...
A high-powered, continuous beam laser system is examined in terms of the physical conditions which exist if the laser beam is brought to a diffraction-limited, real focus in a moderate vacuum environment. Ionization of the gas at the focus by multiphoton processes is extensive, but it is shown that neither reflection of the beam by the plasma at the focus nor absorption by ionization is sufficient to disrupt propagation of the beam through the focus.
Topics: DTIC Archive, Reiss, H R, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *LASERS, HIGH POWER,...
This report describes some of the work being done by the Combat Systems Department of the Naval Surface Weapons Center in the area of combat-system/ship-system design integration. (Author)
Topics: DTIC Archive, Fassnacht,F B, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *Warfare, *Ships,...
For applications where uniform transverse magnetic field is required over a substantial distance, the use of dipole magnets can be quite cumbersome. This illustrative article presents a simple technique to achieve a uniform and uniaxial transverse magnetic field inside a long cylinder, which can be easily carried out.
Topics: DTIC Archive, Nguyen,K T, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *MAGNETIC FIELDS,...
This report documents a FORTRAN routine WOLFQP for solving quadratic programming problems. Theory, usage notes and examples are included in the report.
Topics: DTIC Archive, Wingate,John W, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *Quadratic...
This report describes the Naval Surface Warfare Center Technology Transfer Program and presents narrative summaries of related projects performed during FY87. A technology Application Assessment and a listing of patents/Navy cases having commercial potential are also presented.
Topics: DTIC Archive, Johnson, Ramsey D, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *TECHNOLOGY...
A certain triangular array of the odd integers, which is built up along successive diagonals of a rectangular grid, is correlated with equations of the form x squared-x+c, c=2n-1, n+1,2,3... where n indicates the number of the column (and also the row number for equations x squared + x - r). 'Primitive' cell arrays are derived from the above array. Each such array consists of a prime value p(of c) which is substituted for every integer in the triangular array who is identical to 0(mod p) with...
Topics: DTIC Archive, Sery,R S, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *ARRAYS, *EQUATIONS, *PRIME...
The results of discharging a candidate Li/SO2 Counter Army Decoy battery at 21 amperes are reported and discussed. The candidate battery consisted of 12 'D' size Duracell LO-26SH. None of the battery packs tested met the performance criteria of 28 volts + or - 2 for 5 minutes under a 21-ampere discharge. Three of the five batteries supplied were defective and could not be tested. One of these three had a defective cell and the other two had a high internal impedance. At voltage reversal, the...
Topics: DTIC Archive, Buchholz,S E, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *CELLS,...
Stability properties of the cyclotron maser instability in an annular electron beam propagating through a cylindrical waveguide loaded with a tape helix are investigated, in connection with applications on the gyrotron amplifier. Closed form of the dispersion relation for the cyclotron maser instability is obtained, including influence of the tape helix in stability behavior. It is shown that the bandwidth of the gyrotron amplifier for a tape helix is narrow in comparison with results for a...
Topics: DTIC Archive, Uhm,Han S, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *STABILITY, *WAVEGUIDES,...
The first experiment is reported for microwave generation of the fundamental electron cyclotron frequency from a cusptron oscillator with a smooth conducting wall. A non relativistic axis-rotating electron beam is used to generate the TE sub 11 circular modes in a cavity by the negative mass instability. The TE sub 111 and TE sub 112 modes are separately excited without any mode competition at an approximately 1.8 kW output power with 7.8 percent efficiency. Keywords: Microwave generation;...
Topics: DTIC Archive, Namkung, W, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *CYCLOTRON WAVES,...
Techniques have been developed for routine analysis of 1,2,4- butanetriol (BT) and related compounds, and a number of contaminants in commercial BT have been identified. To determine the nature and levels of contaminants that adversely affect the nitration process, trial nitrations have been run simulating actual conditions in the continuous nitration facility at the Naval Ordnance Station, Indian Head. Purification techniques were examined to improve the quality of commercially obtained BT,...
Topics: DTIC Archive, Pisacane, Frank J., NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *NITRATION,...
A program is presently underway to apply the multiple, high-nu/gamma relativistic electron beams from the Casino I accelerator to achieve high-power x-ray production via the bremsstrahlung process. The approach seeks to combine the v/y = 15, l . 0 MV, 700 kA beams produced by each of the four modules using plasma-channel transport and relativistic beam overlap to maximize the power density and total energy delivered to the x-ray target. Experimental work in the areas of pinch formation, beam...
Topics: DTIC Archive, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *BREMSSTRAHLUNG, *ELECTRON BEAMS, *X...
The computer code INBLAS was developed and published in the early 1970's to describe the blast produced by the reaction of energetic materials inside closed or partially vented structures. Since that time, refinements have been made to several of the code algorithms. These changes have been collected into a new version of the code called INBLAST. This version is designed to run on a desk top personal computer. The code is briefly described. Sample problems are presented and some of the results...
Topics: DTIC Archive, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *COMPUTER PROGRAMS, *CODING, *BLAST,...
The unsteady implicit numerical procedure for solving Euler or Navier- Stokes equations with thin-layer approximation for hypersonic flows over blunt noses developed by Kutler et al is examined and applied to compute the flowfield of hypersonic flows over a series of four severely indented nosetip shapes. For inviscid flows routing calculation fails to give a solution and a special calculation procedure has been developed in order to obtain reasonable solutions. For viscous flows, comparisons...
Topics: DTIC Archive, Hsieh,Tsuying, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *FLOW FIELDS,...
A safety review and test program has been conducted on the Electronic Totalizer Model 799806-212 manufactured by Veeder-Root containing the Panasonic Lithium Polycarbonmonofluoride battery (one cell) BR-2/3A. The cell is used for the LCD display of the totalizer. Tests were conducted on the cell both inside the totalizer and alone. Tests included short circuit, forced discharge into voltage reversal, charging, heat tape, and gas sample collection of combustion products. The tests were run on...
Topics: DTIC Archive, Davis,P B, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *SAFETY, *ELECTRIC...
This report documents an experimental concept related to lithium battery safety. The concept should allow remote visual display of components inside lithium cells while under test conditions. The purpose of the proposed experiment is to provide a safer means for observing the internal components cells under various test conditions including destructive testing. (Author)
Topics: DTIC Archive, Stimler,M, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *ELECTRIC BATTERIES,...
Stability properties of the free streaming mode in an electron beam propagating through a cylindrical waveguide loaded with a tape helix are investigated, including influence of high space harmonic perturbations. Closed algebraic dispersion relation of the free streaming mode are obtained. Properties of the high space harmonic perturbations are numerically investigated in connection with application on a high frequency microwave amplifier. One of the most important features in this analysis is...
Topics: DTIC Archive, Uhm,Han S, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *Harmonics, *Traveling wave...
As part of the Naval Explosives Safety Improvement Program (NESIP), two series of tests have been conducted to determine the maximum TNT equivalence of Naval propellants. Airblast and detonation velocity measurements were made on M26 and NACO 5-inch propelling charges, MK 10 (3.25 in.), MK 16 (5 in.), MK 40 (2.75 in.), MK 58 (SPARROW), MK 37 (ASROC), MK 27 (TARTAR), MK 30 (STANDARD) rocket motors, and TNT cylinders. The Mk 40 and MK 37 motors detonated high order and had a TNT equivalence of...
Topics: DTIC Archive, Swisdak, Jr, M M, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *FIRING...
This report is an update of one issued in 1977 which predicted that the predicted death of analog circuitry (also called linear) would not occur; in fact, the patient appeared remarkably healthy. The report proved correct. We have the same situation again today: the same predictions and counter-prediction. Each year brings significant advances in the field of analog integrated circuitry. Many of the traditional arguments against analog circuitry are no longer valid. This report attempts to...
Topics: DTIC Archive, Delagrange,A D, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *INTEGRATED CIRCUITS,...
Papers presented at the first symposium of the Battery Material Research Association in Brussels, Belgium covered a wide range of topics on the current research being done on battery materials. Information was given on the production and performance of battery materials, thermodynamics of electro-chemical reactions, corrosion of battery materials, and rechargeable systems. (Author)
Topics: DTIC Archive, DeVries,L E, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *SYMPOSIA, *MATERIALS,...
Literature review of five compounds, identified as microgial or mammalian metabolites of 2,4,6-Trinitrotoluene or 2,4-Dinitrotoluene including synthetic and analytical procedures.
Topics: DTIC Archive, Burlinson,Nicholas E, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *LITERATURE...
A number of polyether polyurethane flexible foams are being developed as shock mitagators for electronic equipment aboard Navy aircraft. These foams are based on polyol mixtures derived from poly(oxytetramethylene) glycol and poly(oxypropylene)polyol. This report describes the effect that changes in the basic polyol composition has on the foam's vibration damping and mechanical properties.
Topics: DTIC Archive, Duffy,James V, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *Expanded plastics,...
The surface wave velocity and absorption constant were determined on live bottlenose dolphins as a function of position, propagation direction, and frequency. A progressive wave was propagated on the outer skin of a dolphin by an electromagnetic shaker driven by a noise source. Two miniature accelerometers were attached to the skin at a distance of 3.2 cm apart. The output signals from the accelerometers were analyzed by a dual channel Fast Fourier Transform Spectrum Analyzer. The data...
Topics: DTIC Archive, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *DOLPHINS(MAMMALS), VELOCITY, SURFACE...
This work deals with the effect of aqueous contamination on the anode passivation of Li in 1M LiC10 4-propylene carbonate. Passivation occurs more readily with increasing electrolyte water content. Preliminary evidence suggests that anodic passivation may be due to anodic enrichment and eventual precipitation of LiC10 4 in the superficial anolyte layer.
Topics: DTIC Archive, James,S D, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *LITHIUM, *ELECTROLYTES,...
The report contains documentation for a FORTRAN implementation of a relational database manager. Because the code is written in a high-level language., it is basically transportable to any computer with FORTRAN capability (minor modification may be required for compatibility with a host computer's operating system and compiler). The work was required by U31 to support computer studies requiring the extensive use of minefield planning codes.
Topics: DTIC Archive, Winston,E, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *COMPUTER PROGRAM...
This report describes the results of work concerned with fabricating, electronic circuit assemblies which are undetectable magnetically, and contains recommendations concerning further development work. (Author)
Topics: DTIC Archive, Morris,Hayden, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *MICROCIRCUITS,...
This report describes the results of work concerned with fabricating, electronic circuit assemblies which are undetectable magnetically, and contains recommendations concerning further development work. (Author)
Topics: DTIC Archive, Morris,Hayden, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *MICROCIRCUITS,...
This report describes the results of work concerned with fabricating, electronic circuit assemblies which are undetectable magnetically, and contains recommendations concerning further development work. (Author)
Topics: DTIC Archive, Morris,Hayden, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *MICROCIRCUITS,...
This report describes the results of work concerned with fabricating, electronic circuit assemblies which are undetectable magnetically, and contains recommendations concerning further development work. (Author)
Topics: DTIC Archive, Morris,Hayden, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *MICROCIRCUITS,...
The Navy is funding two areas called combat system architecture (CSA) and combat system engineering (CSE). The question most often asked about these two areas is where does CSA stop and the design begin, and what are the specific functions of CSE. This report attempts to answer these questions by integrating CSA and CSE into a comprehensive system development process. In addition the report recommends which agency should be assigned specific responsibilities within the development process.
Topics: DTIC Archive, Franklin, Jeffrey, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *COMPUTER...
This report describes a theoretical approach to the analysis of the force distribution in fully inflated parachute canopies based upon the inflated gore mainseam shape. Normal and tangential forces for any arbitrary point along the gore mainseam can be determined and the magnitude and location of the maximum normal force and cloth stress evaluated. Methods, criteria, and rationale for calculating the force distributions are presented. Originator-supplied keywords include: Canopy shape, and...
Topics: DTIC Archive, Ludtke,W P, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *STRESS ANALYSIS,...
This report documents a computer program which solves an improperly posed heat conduction problem arising in the measurement of heat transfer data in wind tunnel experiments. The mathematical model which is treated is one dimensional and assumes constant material properties. The computational approach is based on an adaptation of a method used by Alifanov to treat a similar problem. The Green's function for a well posed heat conduction problem is used to reduce the problem to a Volterra...
Topics: DTIC Archive, Bell,John B, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *Numerical analysis,...
All batteries contain chemical materials which can be made to explode under certain conditions. This report defines applicable explosives terminology and discusses these definitions in terms of explosives, thermal runaway and fires associated with aqueous (Le Clanche, mercury, lead acid, nickel cadmium) and non-aqueous (lithium anode systems) batteries. (Author)
Topics: DTIC Archive, Freeman,Carol, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *CHEMICALS,...
This report describes the results of work concerned with fabricating, electronic circuit assemblies which are undetectable magnetically, and contains recommendations concerning further development work. (Author)
Topics: DTIC Archive, Morris,Hayden, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *MICROCIRCUITS,...
Stability properties of a charged beam propagation through a relativistic hollow electron beam are investigated, in connection with present experimental applications in the collective particle accelerator. The stability analysis is carried out for long axial wavelength and low-frequency perturbations. A closed algebraic dispersion relation for coupled transverse oscillations is obtained for the solid and hollow beams with sharp-boundary density profiles. One of the most important features in...
Topics: DTIC Archive, Uhm,Hans S, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *Ion beams, *Charged...
This report presents the design, construction and operational procedures of the NSWC Three-Degree-of-Freedom Gas Bearing. The data reduction technique that is used with angular measurements from this support is developed and applied to measured wind tunnel data. These wind tunnel data were obtained from non-ablating and ablating models undergoing dynamic motion in the NSWC hypersonic Wind Tunnel. Test results are compared with earlier experiments with dynamic ablating models and theoretical...
Topics: DTIC Archive, Regan, F J, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *DYNAMIC TESTS, *GAS...
This report describes the results of work concerned with fabricating, electronic circuit assemblies which are undetectable magnetically, and contains recommendations concerning further development work. (Author)
Topics: DTIC Archive, Morris,Hayden, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *MICROCIRCUITS,...
This report describes the results of work concerned with fabricating, electronic circuit assemblies which are undetectable magnetically, and contains recommendations concerning further development work. (Author)
Topics: DTIC Archive, Morris,Hayden, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *MICROCIRCUITS,...
