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The role of hot electrons in charging of dust grains is investigated in atwo-temperature hydrogen plasma. A variety of dust particles are introducedinto the system and secondary electron emission (SEE) from each of the dustgrains has been reported. A cylindrical Langmuir probe is used for determiningthe plasma parameters and a Faraday cup is connected to an electrometer inorder to measure the dust current. The electrometer readings confirm theelectron emission from the dust and SEE is observed from the tungsten dust in alow-pressure experimental plasma device for the first time.

Experimental study of charging of dust grains in presence of energetic electrons