Speaker
Description
In Penning ion source design the puller electrostatic lens, nominally biased at ±15 kV for
the SIRC test stand, is offset from the plane of initial beam extraction from the plasma
chamber’s anode aperture centreline in order to account for the Lorentz force imparted
by the dipole magnetic field. A study of how this offset can be optimized to limit beam
loss and increase acceptance is done using IBSimu [1] beam modeling software and
phase space analysis for the case of several extracted ions of different mass and
charge state. The specific ions considered for this study are H¯, 4He 2+, and 18O 3+ at
+15kV and -15KV extraction bias voltages, respectively. The shape and geometry of the
puller slit are also investigated for beam performance improvement. The results will aid
in the operation of the Penning ion source test stand under development at the SIRC.
| Email address | bwarfield@uvic.ca |
|---|---|
| Visitor's Visa | no |
| Footnote | [1] Taneli Kalvas et al. “IBSIMU: A three-dimensional simulation software for charged particle optics” . In: The Review of scientific instruments 81 (Feb. 2010), 02B703. doi: 10.1063/1.3258608. |