TY  - CONF
AU  - George, A.M.
AU  - Broderick, N.
AU  - Dehnel, M.P.
AU  - Melanson, S.V.
AU  - Potkins, D.E.
AU  - Shimabukuro, Y.
AU  - Stewart, T.M.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Improvements in Rf Multi Cusp Negative Ion Source
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - D-Pace’s 13.56 MHz Radio Frequency (RF) multi cusp negative ion source uses an Aluminium Nitride (AlN) dielectric window for coupling RF power from an external antenna to the plasma chamber. Ion source operation was limited to low RF power (< 3500 W) due to failures (cracks) occurring on the window during experiments. Such events can cause damages to the vacuum system and plasma chamber. The current work deals with simulations performed on the ion source to study the factors leading to the failure of the window. Based on results from the simulations, a new design was introduced. The improved design yielded positive results in terms of source performance and stability of the AlN window.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 1928
EP  - 1931
KW  - plasma
KW  - ion-source
KW  - simulation
KW  - coupling
KW  - operation
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-TUPTS001
UR  - http://jacow.org/ipac2019/papers/tupts001.pdf
ER  - 

TY  - CONF
AU  - Savard, N.
AU  - Dehnel, M.P.
AU  - Jackle, P.T.
AU  - Marcoux, G.M.
AU  - Melanson, S.V.
AU  - Potkins, D.E.
AU  - Theroux, J.E.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Development of a Penning Ion Source Test Stand for Production of Alpha Particles
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - Medical cyclotron manufacturers are seeking less-costly and more compact ion sources than Electron Cyclotron Resonance Ion Sources (ECRIS) for alpha particle production, which are currently capable of generating beam currents up to 2 mA at energies of 30 keV for axial injection into these cyclotrons. Penning Ion Sources by comparison are relatively old technologies mostly used for cheap singly-charged ion production. However, these ion sources have been used in the past for high-current multiply-charged state ion production of heavy ions up to a few mA of current, and are much smaller, cheaper, and less complex than ECRISs. Therefore, we are developing a Penning Ion source test stand to produce high-current alpha-particles for medical cyclotrons. This requires designs and simulations of all the primary components of the ion source. This system will be used to fully characterize the output beam current and internal plasma properties as a function of varying gas pressure, ion source geometries, magnetic field strength, arc voltage/current, and material properties. The result will be a source optimized for maximum alpha particle beam currents, to be used as a prototype for a commercial Penning Ion Source.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 1932
EP  - 1935
KW  - ion-source
KW  - cathode
KW  - plasma
KW  - cyclotron
KW  - electron
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-TUPTS004
UR  - http://jacow.org/ipac2019/papers/tupts004.pdf
ER  -