Layout of the VENUS ECR ion source.
The VENUS injection. Shown is the high temperature oven, bias disk, and the 18 and 28 GHz waveguides.
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.
Original and modified copper leads temperature.
A 48Ti spectrum produced by VENUS using the modified high temperature oven.
The VENUS low temperature oven.
A 40Ca spectrum produced by VENUS using the low temperature oven.
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.
A schematic diagram of the VENUS waveguide system showing the modifications used to measure the transmitted 18 GHz signal.
(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.
VENUS ECR ion source operating parameters.
Recent VENUS results.
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