ECRIS2016 - List of Keywords (GUI)

Paper	Title	Other Keywords	Page
MOCO03	Cavity Tuning Experiments with the JYFL 14 GHz ECRIS	ion, plasma, cavity, ECR	18
	O.A. Tarvainen, T. Kalvas, H. A. Koivisto, R.J. Kronholm, J.P. Laulainen, J. Orpana JYFL, Jyväskylä, Finland I. Izotov, D. Mansfeld, V. Skalyga IAP/RAS, Nizhny Novgorod, Russia V. Toivanen CERN, Geneva, Switzerland
	Experimental results showing the effect of cavity tuning on oxygen beam currents extracted from the AECR-type JYFL 14 GHz ECRIS are reported. The microwave-plasma coupling properties of the ion source were adjusted by inserting a conducting tuner stub through the injection plug, thus changing the dimensions of the plasma chamber and affecting the cavity properties of the system. The beam currents of high charge state ions were observed to vary up to some tens of percent depending on the tuner position and the microwave frequency.
	Slides MOCO03 [5.745 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2016-MOCO03
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THAO01	Recent production of intense high charge ion beams with VENUS	ion, plasma, ECR, extraction	142
	D. Xie, J.Y. Benitez, C.M. Lyneis, D.S. Todd LBNL, Berkeley, California, USA W. Lu IMP/CAS, Lanzhou, People's Republic of China
	Several modifications have been made to the VENUS to enhance its performance at high microwave power and bring its performance closer to the levels predicted by scaling laws for 28 GHz operation. Two of these modifications improved its tolerance for operation at microwave power up to 10 kW. The cooling scheme on the plasma wall was improved to eliminate damage caused by localized electron heating. Similarly the extraction electrode was redesigned to transport away the electron heating more effectively. The third modification reduced the waveguide diameter, which launches the 28 GHz power into the plasma chamber. The source now runs efficiently at 10 kW of injected power with a more favorable magnetic field configuration. The production of intense highly charged ion beams with VENUS has been substantially enhanced. It has produced a number of record CW beams: 4.5 emA of O⁶⁺, 0.40 emA of Ar¹⁶⁺ and 0.06 emA of Ar¹⁷⁺ and for the first time the VENUS has produced more than 1 emA of Ar¹²⁺ and O⁷⁺. Source tuning is currently underway to explore the potential of VENUS and the overall improved source performance will be presented.
	Slides THAO01 [4.261 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2016-THAO01
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MOCO03

Cavity Tuning Experiments with the JYFL 14 GHz ECRIS

ion, plasma, cavity, ECR

18

O.A. Tarvainen, T. Kalvas, H. A. Koivisto, R.J. Kronholm, J.P. Laulainen, J. Orpana
JYFL, Jyväskylä, Finland
I. Izotov, D. Mansfeld, V. Skalyga
IAP/RAS, Nizhny Novgorod, Russia
V. Toivanen
CERN, Geneva, Switzerland

Experimental results showing the effect of cavity tuning on oxygen beam currents extracted from the AECR-type JYFL 14 GHz ECRIS are reported. The microwave-plasma coupling properties of the ion source were adjusted by inserting a conducting tuner stub through the injection plug, thus changing the dimensions of the plasma chamber and affecting the cavity properties of the system. The beam currents of high charge state ions were observed to vary up to some tens of percent depending on the tuner position and the microwave frequency.

Slides MOCO03 [5.745 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2016-MOCO03

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THAO01

Recent production of intense high charge ion beams with VENUS

ion, plasma, ECR, extraction

142

D. Xie, J.Y. Benitez, C.M. Lyneis, D.S. Todd
LBNL, Berkeley, California, USA
W. Lu
IMP/CAS, Lanzhou, People's Republic of China

Several modifications have been made to the VENUS to enhance its performance at high microwave power and bring its performance closer to the levels predicted by scaling laws for 28 GHz operation. Two of these modifications improved its tolerance for operation at microwave power up to 10 kW. The cooling scheme on the plasma wall was improved to eliminate damage caused by localized electron heating. Similarly the extraction electrode was redesigned to transport away the electron heating more effectively. The third modification reduced the waveguide diameter, which launches the 28 GHz power into the plasma chamber. The source now runs efficiently at 10 kW of injected power with a more favorable magnetic field configuration. The production of intense highly charged ion beams with VENUS has been substantially enhanced. It has produced a number of record CW beams: 4.5 emA of O⁶⁺, 0.40 emA of Ar¹⁶⁺ and 0.06 emA of Ar¹⁷⁺ and for the first time the VENUS has produced more than 1 emA of Ar¹²⁺ and O⁷⁺. Source tuning is currently underway to explore the potential of VENUS and the overall improved source performance will be presented.

Slides THAO01 [4.261 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2016-THAO01

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)