... by the end of their expected performance life ... of membrane- type fore- vacuum pump of ... required computed partial pressure values, the admixture ...
DTIC Science & Technology
For the development of accelerated testing methodology to estimate the life time of electric cable, which is installed in radiation field such as a nuclear reactor containment vessel, radiation and thermal combined degradation of cable insulation and jack...
National Technical Information Service (NTIS)
Resistance degradation in PZT thin-film capacitors has been studied as a function of applied voltage, temperature, and film composition. It is found that the mean-time-to-failure (life-time or t(sub f)) of the capacitors shows a power law dependence on ap...
... were measured, and plume acceleration could be ... thruster design, given its high throughput, absence ... and cathodes, potentially long life time, very ...
Life-time prediction methods, which are based on a number of empirical and phenomenological relationships, are presented. Three aspects are reviewed: effects of testing parameters on high temperature fatigue, life-time prediction, and high temperature fat...
... a nEW PROcESS FOR THE ACCELERATION TEST AND EVALUATION OF AEROMEDICAL EQUIPMENT FOR ... acceleration Testing ...
The absorbing matrix of a volumetric (directly irradiated) solar receiver must be exposed to the concentrated incoming sunlight. Most applications require that the receiver operates at an elevated pressure and in many cases the working fluid is not air. These requirements can be met only if the receiver is equipped with a transparent window. A novel frustum-like high-pressure (FLHiP) window, made ...
Energy Citations Database
Nov 14, 2008 ... This included life-time tests to determine the long-term reliability of the fire -detection system and evaluation of the system in several ...
NASA Website
Qualification results of diode lasers for space applications are presented. Quantum well lasers (AlGaAs / GaAsP at 808 nm) were subjected to accelerated life test. No sudden failure was observed for 120 emitters at different stress conditions over 10,000 hours. Gradual degradation after more than 20,000 hours was modeled by recombination enhanced defect ...
NASA Astrophysics Data System (ADS)
A new ion engine design, called a segmented ion engine, is described which is capable of reducing the required ion source life time for small body rendezvous missions from 18,000 h to about 8,000 h. The use of SAND ion optics for the engine accelerator system makes it possible to substantially reduce the cost of demonstrating the ...
... joint planning, national and international ... ETA (Experimental Test Accelerator) Beam Channel. ... BEAMS, *PARTICLE ACCELERATORS, RADIATION ...
... OF A HIGH ACCELERATION TESTING TECHNIQUE FOR THE ELECTRONIC INSTRUMENTATION OF HARP PROJECTILE SYSTEMS. ...
... Title : RELATIONSHIP OF ACCELERATED TEST METHODS FOR EXFOLIATION RESISTANCE IN 7XXX SERIES ALUMINUM ALLOYS WITH ...
... Title : Preparation of an Accelerated Protection Test Method for Lubricants, Corrosion Preventives and Hydraulic Fluids. ...
... Accession Number : AD0299416. Title : DEVELOPMENT OF ACCELERATED TEST PROCEDURES FOR REFRACTORIES. ...
... Accession Number : ADD126386. Title : Accelerated Testing in Controlled Atmospheres,. Corporate Author : SYSTEMS ...
A sputter source is described in which the beam is extracted through the ionizer. This gives a very compact source with easily changed cones. The beam transmissions through an electrostatic accelerator are good, and life times of in excess of a month between services are normal.
... Corporate Author : Personal Author(s) : PASTUSKA, GERHARD ; LEHMANN, VOLKER. Report Date : AUG 1987. Pagination or Media Count : 3. ...
... federally funded research, testing and training ... ACCELERATED TEST FOR STUDYING THE SUSCEPTIBILITY OF ... drop evaporation test for chloride ...
Resistance degradation in PZT thin-film capacitors has been studied as a function of applied voltage, temperature, and film composition. It is found that the mean-time-to-failure (life-time or t{sub f}) of the capacitors shows a power law dependence on applied voltage of he form t{sub f} {proportional_to} V{sup {minus}n} (n {approximately} 4--5). The capacitor ...
DOE Information Bridge
Fuel performance in the Peach Bottom High-Temperature Gas-Cooled Reactor (HTGR) is reviewed, including (1) the driver elements in the second core and (2) the test elements designed to test fuel for larger HTGR plants. Core 2 of this reactor, which is operated by the Philadelphia Electric Company, performed reliably with an average nuclear steam supply ...
... Title : Use of Accelerated Intergranular Corrosion Tests and Pitting Corrosion Tests to Detect Sensitization and Susceptibility to Intergranular Stress ...
... from federally funded research, testing and training ... for Research Development Test and Evaluation ... Accelerated Laboratory Corrosion Tests to Out ...
Test procedures for accelerated stress-corrosion testing of high-strength aluminum alloys faster and
NASA Technical Reports Server (NTRS)
Ultra High Vacuum (UHV) test setup for electron gun testing has been developed. The development of next generation light sources and accelerators require development of klystron as a radio frequency power source, and in turn electron gun. This UHV electron gun test setup can be used to test the ...
For non-crystalline materials, electronic states can only be calculated for finite clusters, and the results are sensitive to the boundary conditions. States which go to zero on the boundary have infinite life-times, appropriate for isolated clusters, but not for macroscopic materials whose states have finite life-times. Instead, we chose a boundary ...
... Title : Experimental Evaluation of Track Accelerator ... a full scale accelerator which would ... Subject Categories : TEST FACILITIES, EQUIPMENT AND ...
Accelerated Testing and On-Sun Failure of CPV Die-attach. Presentation on CPV accelerated reliability testing.
This contribution deals with capacitively actuated Ohmic switches in series single pole single throw (SPST) configuration for DC up to 4 GHz signal frequency (<0.5 dB insertion loss, 35 dB isolation) and in shunt switch SPST configuration for a frequency range from DC up to 80 GHz (<1.2 dB insertion loss, 18 dB isolation at 60 GHz). A novel high aspect ratio MEMS fabrication sequence in ...
An environmental test chamber providing acceleration of UV radiation and precise temperature control
... Accession Number : ADA225678. Title : Potential Application of Magnetohydrodynamic Acceleration to Hypersonic Environmental Testing. ...
... Descriptors : *INDEXES, *VOCABULARY, *ACCELERATION TOLERANCE, TEST EQUIPMENT, AEROSPACE MEDICINE, CENTRIFUGES. ...
... Accession Number : ADD878289. Title : CRITERIA FOR ACCELERATED RANDOM VIBRATION TESTS. Corporate Author : ...
... Accession Number : ADD311469. Title : CRITERIA FOR ACCELERATED RANDOM VIBRATION TESTS. Corporate Author : ...
Tests with a compensating network show that the response of a thermopile pyranometer can be accelerated by a factor of about ten.
... REPORTS, EFFICIENCY, HIGH PRESSURE ... SUBMARINES, ACCELERATED TESTING, DECOMPRESSION ... ENGINEERING LIFE SUPPORT ...
... Accession Number : ADD303426. Title : APPLICATION OF LINEAR ACCELERATORS IN NONDESTRUCTIVE TESTING. Corporate Author : ...
... SPECTRUM ANALYZERS, MAGNETIC FIELDS, TRANSISTORS, ELECTRON ACCELERATORS, LINEAR ACCELERATORS, OPERATION, TEST ...
Tests SLAC National Accelerator Laboratory About FACET Home What Is FACET? Research Plasma Wakefield Acceleration THz Radiation Plasma Focusing Dielectric Wakefield Acceleration...
Science.gov Websites
The effects of acceleration on quartz and atomic frequency sources are reviewed. Guidelines are provided for the specification and testing of oscillator acceleration sensitivities. The discussion includes: steady-state acceleration effects, gravity change...
The high cost of Pressure Wave Generators (PWGs) is a major barrier to the more widespread use of high-efficiency pulse tube and Stirling cryocoolers. This paper describes the development and testing of a low-cost industrial-style PWG which employs metal diaphragms. The use of diaphragms removes the need for rubbing or clearance seals, and eliminates contamination problems by ...
The ageing behaviour of stainless steel joints bonded with hot-curing adhesives is crucial for their reliability and durability in engineering applications. In industry, accelerated artificial ageing regimes are combined with short-term mechanical tests to simulate the in-service long-term behaviour and to predict the life ...
A literature review and manufacturers survey was conducted to identify the status of accelerated testing and published information pertinent to battery life. The principles of accelerated testing are reviewed with reference to lead-acid batteries. Preliminary experimental designs for ...
