Design and operating characteristics of new type cold cathode ion source

Journal Article · Sat Dec 15 04:00:00 EST 2007 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.2821236· OSTI ID:21024676

Hassan, A; Bassal, N; Zakhary, S G ^[1]

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1. Accelerators and Ion Sources Department, NRC, AEA, AbuZaabal, Cairo 13759 (Egypt)

In this work, the design and performance of new type ion source are described. The discharge mechanism of the source is based on creating an arc discharge through a saddle electric field inside the discharge tube. The saddle electric field is created by immersing an annular anode inside the discharge tube covered from the upper and lower ends with two flanges. These two flanges act as cathodes. The discharge tube is surrounded by a solenoid coil which produces an axial magnetic field (up to 400 G) measured at the center of the source. Measurements have been performed to find out the influence of arc power, pressure, discharge voltage, magnetic field, and extracting voltage on the ion source properties. The source yields an argon ion current of {approx}0.6 mA and electron current of {approx}4 mA at normal operating conditions (extraction voltage V{sub ex}=7 kV, pressure of 5.5x10{sup -4} Torr, V{sub arc}=400 V, I{sub arc}=1 A, B=200 G). It showed an energy spread of 20 eV at a discharge voltage of 400 V and an extraction voltage of 3 kV.

• OSTI ID: 21024676
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 12 Vol. 78; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ANODES
ARGON IONS
CATHODES
DESIGN
ELECTRIC ARCS
ELECTRIC FIELDS
ELECTRIC POTENTIAL
ELECTRONS
EV RANGE
FLANGES
GAS DISCHARGE TUBES
ION SOURCES
MAGNETIC FIELDS
PERFORMANCE
SOLENOIDS