Measurement of metastable atom densities in a narrow tube

1995 Fiscal Year Final Research Report Summary

• Project/Area Number: 06640534
• Research Category: Grant-in-Aid for General Scientific Research (C)
• Allocation Type: Single-year Grants
• Research Field: 物理学一般
• Research Institution: Tokyo Denki University
• Principal Investigator: KANEDA Teruo Tokyo Denki University, Faculty of engineering, Professor, 工学部, 教授 (50057220)
• Project Period (FY): 1994 – 1995
• Keywords: metastable / narrow tube / discharge / positivecolumn / prasma

Research Abstract

Metastable atom densitive (He, Ne, Ar) and resonance excited atom densities (Ar) of dcglow discharge positive olumn plasma in a narrow tube were investigated both experimentally and numerically. The results show that : (1) He single metastable atom densities are observed to be nonmonotomically dependent on the gas pressure, and have no significance dependence on the discharge current, hence plasma density ; (2) He triplet metastable atom densities increase with increasing discharge current and are nonmonotonically dependent on gas pressure ; (3) Ne matastable densities increase with both gas pressure and discharge current ; (4) Ar metastable atom densities in low pressure increase with both gas pressure and discharge current.