ECRIS2012 - List of Keywords (background)

Paper	Title	Other Keywords	Page
TUYO04	Neutral Gas Temperature Measurements of a Radio Frequency Micro-thruster	plasma, ion, electron, vacuum	25
	A.D. Greig, R.W. Boswell, C. Charles, R.P. Hawkins SP3, Canberra, Australia M.D. Bowden, Y.C. Sutton The Open University, Milton Keynes, United Kingdom
	A radio frequency (13.56 MHz) capacitively coupled cylindrical argon plasma discharge was analysed using optical emission spectroscopy (OES) for various powers and pressures in the ranges 10 W to 40 W and 0.5 Torr to 5 Torr. Trace amounts of nitrogen were added to the discharge to estimate the temperature of the neutrals using rovibrational band matching of the 2^nd positive system of nitrogen and the 1^st negative system of nitrogen ions. Comparing simulated computer generated spectra of these bands to experimentally measured spectra determined the rotational and vibrational temperatures of the nitrogen, from which the temperature of the neutrals was inferred by assuming the rotational temperature was the same as the neutral gas temperature.
	Slides TUYO04 [1.341 MB]

THYO01	Operation of an ECRIS Charge State Breeder at TRIUMF	ion, plasma, experiment, ECR	163
	F. Ames, R.A. Baartman, P.G. Bricault, K. Jayamanna, A. Mjøs TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
	After initial commissioning of the charge state breeder for radioactive ions at the TRIUMF/ISAC facility further tests on the performance of the system have been performed. One of the major problems found was the high background of stable ions from the ECR source, mainly C, N, O, Ar, Fe, Ni, C and Cr. The main source of those is the residual gas and sputtered material from the plasma chamber wall and from the surrounding electrodes. Although their intensity is small it can be orders of magnitude more than the intensity from the radioactive ions. Therefore, the original stainless steel plasma chamber of the Pantechnik PHOENIX ECR source has been exchanged to aluminium with an ultra pure aluminium coating, all electrodes for injection and extraction of the ions have been replaced with aluminium and the iron joke at the extraction side, which is part of the vacuum system in the PHOENIX source has been coated as well. This combined effect has reduced the amount of background ions substantially. Detailed results on the performance of the source after those changes will be presented.
	Slides THYO01 [1.634 MB]

Paper

Title

Other Keywords

Page

TUYO04

Neutral Gas Temperature Measurements of a Radio Frequency Micro-thruster

plasma, ion, electron, vacuum

25

A.D. Greig, R.W. Boswell, C. Charles, R.P. Hawkins
SP3, Canberra, Australia
M.D. Bowden, Y.C. Sutton
The Open University, Milton Keynes, United Kingdom

A radio frequency (13.56 MHz) capacitively coupled cylindrical argon plasma discharge was analysed using optical emission spectroscopy (OES) for various powers and pressures in the ranges 10 W to 40 W and 0.5 Torr to 5 Torr. Trace amounts of nitrogen were added to the discharge to estimate the temperature of the neutrals using rovibrational band matching of the 2^nd positive system of nitrogen and the 1^st negative system of nitrogen ions. Comparing simulated computer generated spectra of these bands to experimentally measured spectra determined the rotational and vibrational temperatures of the nitrogen, from which the temperature of the neutrals was inferred by assuming the rotational temperature was the same as the neutral gas temperature.

Slides TUYO04 [1.341 MB]

THYO01

Operation of an ECRIS Charge State Breeder at TRIUMF

ion, plasma, experiment, ECR

163

F. Ames, R.A. Baartman, P.G. Bricault, K. Jayamanna, A. Mjøs
TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada

After initial commissioning of the charge state breeder for radioactive ions at the TRIUMF/ISAC facility further tests on the performance of the system have been performed. One of the major problems found was the high background of stable ions from the ECR source, mainly C, N, O, Ar, Fe, Ni, C and Cr. The main source of those is the residual gas and sputtered material from the plasma chamber wall and from the surrounding electrodes. Although their intensity is small it can be orders of magnitude more than the intensity from the radioactive ions. Therefore, the original stainless steel plasma chamber of the Pantechnik PHOENIX ECR source has been exchanged to aluminium with an ultra pure aluminium coating, all electrodes for injection and extraction of the ions have been replaced with aluminium and the iron joke at the extraction side, which is part of the vacuum system in the PHOENIX source has been coated as well. This combined effect has reduced the amount of background ions substantially. Detailed results on the performance of the source after those changes will be presented.

Slides THYO01 [1.634 MB]