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Title: Measurement of temperature of a dusty plasma from its configuration

Journal Article · · Contributions to Plasma Physics
 [1];  [2];  [3];  [4];  [5]
  1. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Inst. for Plasma Research, Gandhinagar (India)
  2. Inst. for Plasma Research, Gandhinagar (India); Auburn Univ., AL (United States)
  3. Univ. of Delhi, New Delhi (India)
  4. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  5. Auburn Univ., AL (United States)

A new concept called “configurational temperature” is introduced in the context of dusty plasma, where the temperature of the dust particles submerged in the plasma can be measured directly from the positional information of the individual dust particles and the interaction potential between the dust grains. This method does not require the velocity information of individual particles, which is a key parameter to measure the dust temperature in the conventional method. The technique is initially tested using two-dimensional (2D) OpenMP parallel molecular dynamics and Monte Carlo simulation and then compared with the temperature evaluated from experimental data. The experiment have been carried out in the Dusty Plasma Experimental (DPEx) device, where a 2D stationary plasma crystal of melamine formaldehyde particles is formed in the cathode sheath of a DC glow discharge argon plasma. The kinetic temperature of the dust is calculated using the standard particle image velocimetry technique at different pressures. An extended simulation result for the three-dimensional case is also presented, which can be employed for the temperature measurement of a three-dimensional dust crystal in laboratory devices.

Research Organization:
Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-09CH11466
OSTI ID:
1651130
Journal Information:
Contributions to Plasma Physics, Journal Name: Contributions to Plasma Physics Journal Issue: 4 Vol. 60; ISSN 0863-1042
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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