Cyclotrons2013 - List of Authors (Celona, L.)

Paper	Title	Page
TUPPT014	Characterization of the Versatile Ion Source (VIS) for the Production of Monocharged Light Ion Beams	183
	L. Celona, L. Calabretta, G. Castro, G. Ciavola, S. Gammino, D. Mascali, L. Neri, G. Torrisi INFN/LNS, Catania, Italy G. Castro Universita Degli Studi Di Catania, Catania, Italy F. Di Bartolo INFN & Messina University, S. Agata, Messina, Italy
	Funding: The support of the 5th National Committee of INFN is gratefully acknowledged. The Versatile Ion Source (VIS) is an off-resonance Microwave Discharge Ion Source which produces a slightly overdense plasma at 2.45 GHz of pumping frequency. In the measurements carried out at INFN-LNS in the last two years, VIS was able to produce more than 50 mA of proton beams and He⁺ beams at 65 kV, while for H²⁺ a current of 15 mA was obtained. The know-how obtained with the VIS source has been useful for the design of the proton source of the European Spallation Source, to be built in Lund, Sweden, and it will be used also for other facilities. In particular, the design modifications of the VIS source under study at INFN-LNS, in order to use the new source as the injector of H²⁺ at the ISODAR facility, will be also presented.

WEPPT026	Cyclotron Injection Tests of High-Intensity H²⁺ Beam	372
	F.S. Labrecque, B.F. Milton BCSI, Vancouver, BC, Canada J.R. Alonso, D. Campo, J.M. Conrad, M. Toups MIT, Cambridge, Massachusetts, USA L. Calabretta, L. Celona INFN/LNS, Catania, Italy R. Gutierrez-Martinez, L.A. Winslow UCLA, Los Angeles, USA D. Winklehner NSCL, East Lansing, Michigan, USA
	Funding: Work funded by NSF agency, contract PHY-1148134 The IsoDAR (sterile neutrino) and DAEδALUS (CP-violation in neutrino sector) experiments will use cyclotrons to deliver high intensity (10 mA peak current) proton beams to neutrino-producing targets. To achieve these very high currents, we plan to inject and accelerate molecular H²⁺ ions. To understand high intensity H²⁺ injection into the central region of a compact cyclotron, and to benchmark space-charge dominated simulation studies, central-region tests are being conducted. The first test was completed this summer; a collaboration of MIT, BEST Cyclotrons and INFN-LNS at the BEST shops in Vancouver. The LNS Versatile Ion Source (VIS) was shipped from Catania to Vancouver, and was mounted, along with HV components and first focusing solenoid, on a test bench. In addition to the bench, BEST provided further beam line elements, instrumentation and a test cyclotron magnet for acceleration to no greater than 1 MeV/amu (to avoid any neutron production). Axial injection studies were conducted with a Catania-designed spiral inflector. Experimental configurations, beam characterization measurements, and phase acceptance and buncher efficiency studies will be reported.

WEPPT028	Proposal for High Power Cyclotrons Test Site in Catania	378
	L. Calabretta, D. Campo, L. Celona, L. Cosentino, C. Cui, G. Gallo, D. Rifuggiato INFN/LNS, Catania, Italy J.R. Alonso, W.A. Barletta, A. Calanna, D. Campo, J.M. Conrad MIT, Cambridge, Massachusetts, USA R.R. Johnson BCSI, Vancouver, BC, Canada L. AC. Piazza INFN/LNL, Legnaro (PD), Italy
	The IsoDAR and DAEδALUS experiments will use cyclotrons to deliver high intensity (10 mA peak current) proton beams to neutrino-producing targets. To achieve these very high currents, we plan to inject and accelerate molecular H²⁺ ions in the cyclotrons. To understand high intensity H²⁺ injection into the central region of a compact cyclotron, and to benchmark space-charge dominated simulation studies, central-region tests are being conducted. Building on the first experiments at Best Cyclotrons, Vancouver (Abstract 1261), a larger-scale test cyclotron will be built at INFN-LNS in Catania. This cyclotron will be designed for 7 MeV/n (Q/A = 0.5; H²⁺ or He⁺+). After the first year of operation dedicated at optimization of the central region for the injection of high intensity Q/A = 0.5 beams, the cyclotron will be modified to allow the acceleration of H⁻ up to an energy of 28 MeV. The main characteristics of the machine and the planned test stand will be presented.

Paper

Title

Page

Characterization of the Versatile Ion Source (VIS) for the Production of Monocharged Light Ion Beams

183

L. Celona, L. Calabretta, G. Castro, G. Ciavola, S. Gammino, D. Mascali, L. Neri, G. Torrisi
INFN/LNS, Catania, Italy
G. Castro
Universita Degli Studi Di Catania, Catania, Italy
F. Di Bartolo
INFN & Messina University, S. Agata, Messina, Italy

Funding: The support of the 5th National Committee of INFN is gratefully acknowledged.
The Versatile Ion Source (VIS) is an off-resonance Microwave Discharge Ion Source which produces a slightly overdense plasma at 2.45 GHz of pumping frequency. In the measurements carried out at INFN-LNS in the last two years, VIS was able to produce more than 50 mA of proton beams and He⁺ beams at 65 kV, while for H²⁺ a current of 15 mA was obtained. The know-how obtained with the VIS source has been useful for the design of the proton source of the European Spallation Source, to be built in Lund, Sweden, and it will be used also for other facilities. In particular, the design modifications of the VIS source under study at INFN-LNS, in order to use the new source as the injector of H²⁺ at the ISODAR facility, will be also presented.

WEPPT026

Cyclotron Injection Tests of High-Intensity H²⁺ Beam

372

F.S. Labrecque, B.F. Milton
BCSI, Vancouver, BC, Canada
J.R. Alonso, D. Campo, J.M. Conrad, M. Toups
MIT, Cambridge, Massachusetts, USA
L. Calabretta, L. Celona
INFN/LNS, Catania, Italy
R. Gutierrez-Martinez, L.A. Winslow
UCLA, Los Angeles, USA
D. Winklehner
NSCL, East Lansing, Michigan, USA

Funding: Work funded by NSF agency, contract PHY-1148134
The IsoDAR (sterile neutrino) and DAEδALUS (CP-violation in neutrino sector) experiments will use cyclotrons to deliver high intensity (10 mA peak current) proton beams to neutrino-producing targets. To achieve these very high currents, we plan to inject and accelerate molecular H²⁺ ions. To understand high intensity H²⁺ injection into the central region of a compact cyclotron, and to benchmark space-charge dominated simulation studies, central-region tests are being conducted. The first test was completed this summer; a collaboration of MIT, BEST Cyclotrons and INFN-LNS at the BEST shops in Vancouver. The LNS Versatile Ion Source (VIS) was shipped from Catania to Vancouver, and was mounted, along with HV components and first focusing solenoid, on a test bench. In addition to the bench, BEST provided further beam line elements, instrumentation and a test cyclotron magnet for acceleration to no greater than 1 MeV/amu (to avoid any neutron production). Axial injection studies were conducted with a Catania-designed spiral inflector. Experimental configurations, beam characterization measurements, and phase acceptance and buncher efficiency studies will be reported.

WEPPT028

Proposal for High Power Cyclotrons Test Site in Catania

378

L. Calabretta, D. Campo, L. Celona, L. Cosentino, C. Cui, G. Gallo, D. Rifuggiato
INFN/LNS, Catania, Italy
J.R. Alonso, W.A. Barletta, A. Calanna, D. Campo, J.M. Conrad
MIT, Cambridge, Massachusetts, USA
R.R. Johnson
BCSI, Vancouver, BC, Canada
L. AC. Piazza
INFN/LNL, Legnaro (PD), Italy

The IsoDAR and DAEδALUS experiments will use cyclotrons to deliver high intensity (10 mA peak current) proton beams to neutrino-producing targets. To achieve these very high currents, we plan to inject and accelerate molecular H²⁺ ions in the cyclotrons. To understand high intensity H²⁺ injection into the central region of a compact cyclotron, and to benchmark space-charge dominated simulation studies, central-region tests are being conducted. Building on the first experiments at Best Cyclotrons, Vancouver (Abstract 1261), a larger-scale test cyclotron will be built at INFN-LNS in Catania. This cyclotron will be designed for 7 MeV/n (Q/A = 0.5; H²⁺ or He⁺+). After the first year of operation dedicated at optimization of the central region for the injection of high intensity Q/A = 0.5 beams, the cyclotron will be modified to allow the acceleration of H⁻ up to an energy of 28 MeV. The main characteristics of the machine and the planned test stand will be presented.