Absolute measurement of the total ion-drag force on a single plasma-confined microparticle at the void edge under microgravity conditions.

نویسندگان

  • J Beckers
  • D J M Trienekens
  • G M W Kroesen
چکیده

We present an absolute measurement of the total ion-drag force on one single microparticle at the edge of the dust free region in low pressure complex plasmas: the void. In order to do so, the particle confinement position was monitored as a function of the gas pressure for two particle sizes under normal gravity conditions and under microgravity conditions during parabolic flights. At the border of the void, the ion-drag force on a particle with a radius of 4.90 μm appeared to be (3.6±0.3)×10(-12) N.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Theory of dust voids in plasmas.

Dusty plasmas in a gas discharge often feature a stable void, i.e., a dust-free region inside the dust cloud. This occurs under conditions relevant to both plasma processing discharges and plasma crystal experiments. The void results from a balance of the electrostatic and ion drag forces on a dust particle. The ion drag force is driven by a flow of ions outward from an ionization source and to...

متن کامل

Probe induced voids in a dusty plasma

Dusty plasmas are susceptible to the formation of a ‘‘void,’’ a centimeter-size region within the plasma that is free of dust particles. The boundary between the dust-free plasma ~void! and the dusty plasma is typically quite sharp. Praburam and Goree first reported the appearance of a spoke-shaped, dust-free region in a cloud of 100-nm carbon particles in a radio-frequency discharge formed bet...

متن کامل

Dusty plasma diagnostics methods for charge, electron temperature, and ion density

Diagnostic methods are developed to measure the microparticle charge Q and two plasma parameters, electron temperature Te, and ion density ni, in the main plasma region of a dusty plasma. Using video microscopy to track microparticles yields a resonance frequency, which along with a charging model allows an estimation of Q and Te. Only measurements of microparticle position and velocity are req...

متن کامل

Radiometric force in dusty plasmas.

It is shown that inhomogeneous heating of the dust grain by ion flow in a glow discharge results in a photophoresislike force. According to our estimations, this radiometric force can be comparably-valued with the ion-drag force under the conditions of microgravity dusty plasma experiments.

متن کامل

On non-linear excitation of voids in dusty plasmas

The void, which is a dust-free region inside the dust cloud in the plasma, results from a balance of the electrostatic force and the ion drag force on a dust particulate. The ion drag force having numerous forms, some of which are based on models whereas others are driven from first principles. To explain the generation of voids, Avinash et al. proposed a timedependent nonlinear model that desc...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Physical review. E, Statistical, nonlinear, and soft matter physics

دوره 88 5  شماره 

صفحات  -

تاریخ انتشار 2013