Development of large volume double ring penning plasma discharge source for efficient light emissions

Journal Article · Sat Dec 15 00:00:00 EST 2012 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4768536· OSTI ID:22094029

Prakash, Ram; Vyas, Gheesa Lal; Jain, Jalaj; Prajapati, Jitendra; Pal, Udit Narayan ^[1]; Chowdhuri, Malay Bikas; Manchanda, Ranjana ^[2]

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1. Microwave Tubes Division, CSIR-Central Electronics and Engineering Research Institute, Pilani-333031 (India)
2. Institute for Plasma Research, Bhat, Gandhinagar-382428 (India)

In this paper, the development of large volume double ring Penning plasma discharge source for efficient light emissions is reported. The developed Penning discharge source consists of two cylindrical end cathodes of stainless steel having radius 6 cm and a gap 5.5 cm between them, which are fitted in the top and bottom flanges of the vacuum chamber. Two stainless steel anode rings with thickness 0.4 cm and inner diameters 6.45 cm having separation 2 cm are kept at the discharge centre. Neodymium (Nd{sub 2}Fe{sub 14}B) permanent magnets are physically inserted behind the cathodes for producing nearly uniform magnetic field of {approx}0.1 T at the center. Experiments and simulations have been performed for single and double anode ring configurations using helium gas discharge, which infer that double ring configuration gives better light emissions in the large volume Penning plasma discharge arrangement. The optical emission spectroscopy measurements are used to complement the observations. The spectral line-ratio technique is utilized to determine the electron plasma density. The estimated electron plasma density in double ring plasma configuration is {approx}2 Multiplication-Sign 10{sup 11} cm{sup -3}, which is around one order of magnitude larger than that of single ring arrangement.

• OSTI ID: 22094029
• Journal Information: Review of Scientific Instruments, Vol. 83, Issue 12; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BORON COMPOUNDS
CYLINDRICAL CONFIGURATION
EMISSION
EMISSION SPECTROSCOPY
IRON COMPOUNDS
MAGNETIC FIELDS
NEODYMIUM COMPOUNDS
PENNING DISCHARGES
PERMANENT MAGNETS
PLASMA
PLASMA DENSITY
PLASMA DIAGNOSTICS
SIMULATION
STAINLESS STEELS
TERNARY ALLOY SYSTEMS
THICKNESS
VISIBLE RADIATION