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Recent progress on the superconducting ion source VENUSa)
a)Contributed paper, published as part of the Proceedings of the 14th International Conference on Ion Sources, Giardino Naxos, Italy, September 2011.
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10.1063/1.3662119
/content/aip/journal/rsi/83/2/10.1063/1.3662119
http://aip.metastore.ingenta.com/content/aip/journal/rsi/83/2/10.1063/1.3662119

Figures

Image of FIG. 1.
FIG. 1.

Layout of the VENUS ECR ion source.

Image of FIG. 2.
FIG. 2.

The VENUS injection. Shown is the high temperature oven, bias disk, and the 18 and 28 GHz waveguides.

Image of FIG. 3.
FIG. 3.

The side view (a) and top down view (b) of the HiT oven show the Cu oven leads bend when run under high currents and in the presence of a high magnetic field. The side view (c) and top down view (d) after modifying the Cu leads and testing the oven show an intact oven.

Image of FIG. 4.
FIG. 4.

Original and modified copper leads temperature.

Image of FIG. 5.
FIG. 5.

A 48Ti spectrum produced by VENUS using the modified high temperature oven.

Image of FIG. 6.
FIG. 6.

The VENUS low temperature oven.

Image of FIG. 7.
FIG. 7.

A 40Ca spectrum produced by VENUS using the low temperature oven.

Image of FIG. 8.
FIG. 8.

The injection end of the VENUS ECR ion source. The 18 GHz waveguide is shown near the top of the screen structure with a waveguide extension, which has a beveled transition. 28 GHz is fed through the round waveguide shown at the bottom of the RF screen structure below the bias disk.

Image of FIG. 9.
FIG. 9.

A schematic diagram of the VENUS waveguide system showing the modifications used to measure the transmitted 18 GHz signal.

Image of FIG. 10.
FIG. 10.

(a) The transient behavior of the reflected and transmitted power for the first few ms after RF is turned on. The reflected and transmitted power curves are normalized to 1 at t = 0+ and are shown for 340 W of 18 GHz switched on at t = 0. (b) After reaching a minimum at about 10 ms, the reflected power slowly increases over the next 50 ms. The transmitted power also shows some relatively slow changes in the first 150 ms.

Tables

Generic image for table
Table I.

VENUS ECR ion source operating parameters.

Generic image for table
Table II.

Recent VENUS results.

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/content/aip/journal/rsi/83/2/10.1063/1.3662119
2012-02-06
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Recent progress on the superconducting ion source VENUSa)
http://aip.metastore.ingenta.com/content/aip/journal/rsi/83/2/10.1063/1.3662119
10.1063/1.3662119
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