LINAC2014 - List of Authors (Castro, G.)

Paper	Title	Page
MOPP086	Ecr Ion Sources Developments at INFN-LNS for the Production of High Brightness Highly Charged Ion Beams	254
	D. Mascali, C. Altana, L. Andò, C. Caliri, G. Castro, L. Celona, S. Gammino, L. Neri, F.P. Romano, G. Torrisi INFN/LNS, Catania, Italy G. Sorbello University of Catania, Catania, Italy
	The design of future high-performing ECRIS will require alternative approaches in microwave-to-plasma coupling, in order to maximize the electron density at relatively low frequency and reduce the super-hot electrons formation and their consequences on the beam stability and on source reliability. On these purposes, different activities have been carried out at INFN-LNS in the recent past, including advanced modelling, diagnostics, and studies about alternative methods of plasma heating based on electrostatic-waves generation. A description of these activities will be presented, with special emphasis to the microwave to plasma coupling and to the plasma diagnostics. Some of the already collected results have been a basis for the design of the new AISHa source (for hadrontherapy purposes) and the construction of the innovative prototype named Flexible Plasma Trap: on this machine we will search for advanced schemes of microwave launching, now ongoing thanks to full-wave plus kinetic calculations of the wave-to-plasma interaction mechanism

THPP085	The Prototype of the Proton Injector for the European Spallation Source	1044
	L. Celona, L. Andò, G. Castro, S. Gammino, D. Mascali, L. Neri, G. Torrisi INFN/LNS, Catania, Italy
	The update of the design of the PS-ESS source and of its LEBT has been carried out in 2013 and the construction is now ongoing. The Ion Source will be able to provide a proton beam current larger than 70 mA to the 3.6 MeV RFQ. Several innovative solutions have been implemented in the redesign phase in order to cope with high-reliability/high-performance requirements of the ESS project. A flexible magnetic system will allow to investigate alternative configurations for future ion current upgrade of the machine based on the formation of a denser plasma. Innovative set-ups have been also explored for beam extraction, transport and chopping. Calculations have shown that space charge compensation up to 95 % is needed to preserve the low emittance in the low energy beam transfer line (LEBT). In order to obtain the optimal proton beam pulse rise and fall time – that should be 100 ns – we propose a LEBT chopping configuration that permits hundred nanosecond rise times despite the LEBT compensation needs few microseconds. The ongoing development of a 3D PIC code will be also described, that should allow predicting and tuning the beam pulse for different source/LEBT operative configurations.

Paper

Title

Page

Ecr Ion Sources Developments at INFN-LNS for the Production of High Brightness Highly Charged Ion Beams

254

D. Mascali, C. Altana, L. Andò, C. Caliri, G. Castro, L. Celona, S. Gammino, L. Neri, F.P. Romano, G. Torrisi
INFN/LNS, Catania, Italy
G. Sorbello
University of Catania, Catania, Italy

The design of future high-performing ECRIS will require alternative approaches in microwave-to-plasma coupling, in order to maximize the electron density at relatively low frequency and reduce the super-hot electrons formation and their consequences on the beam stability and on source reliability. On these purposes, different activities have been carried out at INFN-LNS in the recent past, including advanced modelling, diagnostics, and studies about alternative methods of plasma heating based on electrostatic-waves generation. A description of these activities will be presented, with special emphasis to the microwave to plasma coupling and to the plasma diagnostics. Some of the already collected results have been a basis for the design of the new AISHa source (for hadrontherapy purposes) and the construction of the innovative prototype named Flexible Plasma Trap: on this machine we will search for advanced schemes of microwave launching, now ongoing thanks to full-wave plus kinetic calculations of the wave-to-plasma interaction mechanism

THPP085

The Prototype of the Proton Injector for the European Spallation Source

1044

L. Celona, L. Andò, G. Castro, S. Gammino, D. Mascali, L. Neri, G. Torrisi
INFN/LNS, Catania, Italy

The update of the design of the PS-ESS source and of its LEBT has been carried out in 2013 and the construction is now ongoing. The Ion Source will be able to provide a proton beam current larger than 70 mA to the 3.6 MeV RFQ. Several innovative solutions have been implemented in the redesign phase in order to cope with high-reliability/high-performance requirements of the ESS project. A flexible magnetic system will allow to investigate alternative configurations for future ion current upgrade of the machine based on the formation of a denser plasma. Innovative set-ups have been also explored for beam extraction, transport and chopping. Calculations have shown that space charge compensation up to 95 % is needed to preserve the low emittance in the low energy beam transfer line (LEBT). In order to obtain the optimal proton beam pulse rise and fall time – that should be 100 ns – we propose a LEBT chopping configuration that permits hundred nanosecond rise times despite the LEBT compensation needs few microseconds. The ongoing development of a 3D PIC code will be also described, that should allow predicting and tuning the beam pulse for different source/LEBT operative configurations.