A high sensitivity momentum flux measuring instrument for plasma thruster exhausts and diffusive plasmas
نویسندگان
چکیده
منابع مشابه
A high sensitivity momentum flux measuring instrument for plasma thruster exhausts and diffusive plasmas.
A high sensitivity momentum flux measuring instrument based on a compound pendulum has been developed for use with electric propulsion devices and radio frequency driven plasmas. A laser displacement system, which builds upon techniques used by the materials science community for surface stress measurements, is used to measure with high sensitivity the displacement of a target plate placed in a...
متن کاملHigh-sensitivity instrument for measuring atmospheric NO2.
We report on the development of a high-sensitivity detection system for measuring atmospheric NO2 using a laser-induced fluorescence (LIF) technique around 440 nm. A tunable broad-band optical parametric oscillator laser pumped by the third harmonic of a Nd:YAG laser is used as a fluorescence excitation source. The laser wavelength is tuned at peak and bottom wavelengths around 440 nm alternati...
متن کاملO2-MAVS: an Instrument for Measuring Oxygen Flux
With the awareness that the surface ocean is becoming more acidic due to the uptake of anthropogenic CO2 and that the resulting decrease in carbonate ion concentration is contributing to a decline in the calcification rate of many organisms, there is a pressing need to develop methods that can easily and reliably measure the calcification rates of these organisms under natural conditions so tha...
متن کاملOptical tweezers system measuring the change in light momentum flux
This article describes the design of a dual-beam optical tweezers ~OT! instrument which, in contrast to conventional single-beam OT, directly measures the change in light momentum flux when a trapped object experiences a force. Consequently, no local calibration is needed to measure the force acting on a trapped particle. The instrument has a high trapping efficiency and forces up to 200 pN can...
متن کاملA robotic instrument for measuring high altitude atmospheric turbulence
To properly characterize the atmospheric properties of a site for a future large telescope or interferometer, it is insufficient to measure quantities, such as the full-width at half-maximum of a stellar image, that have been integrated over the entire atmosphere. A knowledge of the turbulence distribution as a function of height is necessary, since this affects the ease and degree to which ada...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Review of Scientific Instruments
سال: 2009
ISSN: 0034-6748,1089-7623
DOI: 10.1063/1.3142477