IPAC2015 - List of Authors (Rojatti, E.)

Paper	Title	Page
MOPHA050	Online Spill Intensity Monitoring for Improving Extraction Quality at CNAO	907
	M. Caldara University of Bergamo, Bergamo, Italy J. Bosser, G.M.A. Calvi, L. Lanzavecchia, A. Parravicini, C. Viviani CNAO Foundation, Milan, Italy E. Rojatti UniPV, Pavia, Italy
	The CNAO Foundation is the first Italian center for deep hadrontherapy with Protons and Carbon Ions, performing treatments since September 2011. The extracted beam energy and intensity can vary over a wide range (60-250 MeV for Protons and 120-400 MeV/u for Carbon Ions, 4e6/10¹⁰ pps); the beam intensity uniformity during the slow extraction process is a fundamental requirement for achieving accurate and fast treatments. CNAO developed an online Fast Intensity Monitor (FIM), not perturbing the extracted beam, capable of measuring beam intensity with a bandwidth of 50kHz and a resolution of 1%. It consists of a thin (0.8 μm) metallic foil that emits secondary electrons when traversed by the beam. The electrons are multiplied by a Channeltron device, polarized at high voltage versus ground. The Channeltron output current is amplified and converted in a Pulse Width Modulated (PWM) signal, which is then decoupled and transmitted to the equipment room, where an FPGA implements a servo-spill. The work presents the detector, the floating electronics, the preliminary measurements with beam and the integration in a closed loop on the synchrotron air-core quadrupole obtaining promising results.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPHA050
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MOPHA051	Scintillating Fibers used as Profile Monitors for the CNAO HEBT Lines	910
	E. Rojatti UniPV, Pavia, Italy J. Bosser, M. Haguenauer, P. Poilleux CERN, Geneva, Switzerland J. Bosser, G.M.A. Calvi, L. Lanzavecchia, A. Parravicini, M. Pullia, C. Viviani CNAO Foundation, Milan, Italy M. Caldara University of Bergamo, Bergamo, Italy
	The CNAO (Centro Nazionale di Adroterapia Oncologica) Foundation is the first Italian center for deep hadrontherapy with Protons and Carbon Ions. Several beam monitors exploiting the scintillation process have been designed to check the beam quality in the extraction lines, in order to guarantee patients safety. The SFH (Scintillating Fibers Harp), the QPM (Qualification Profile Monitor), and the SFP (Scintillating Fibers plus Photodiodes) are made up by two orthogonal scintillating fibers harps with not dead area for the horizontal and the vertical beam profiles measurement. The QPM and the SFH are both installed on the beam line and they use a CCD camera for the signal acquisition. The SFP is a SFH upgrade project aimed to replace the camera with two Photodiodes arrays coupled to the fibers in vacuum. The WD (Watch Dog) detector, not already installed, has been designed to check the beam position through the intensity of the beam tails. It uses two couples of scintillating fibers displaced transversally to the beam direction, coupled to four APDs (Avalanche Photodiodes). This work describes the beam detectors, their achieved performances and the most recent beam measurements.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPHA051
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Online Spill Intensity Monitoring for Improving Extraction Quality at CNAO

907

M. Caldara
University of Bergamo, Bergamo, Italy
J. Bosser, G.M.A. Calvi, L. Lanzavecchia, A. Parravicini, C. Viviani
CNAO Foundation, Milan, Italy
E. Rojatti
UniPV, Pavia, Italy

The CNAO Foundation is the first Italian center for deep hadrontherapy with Protons and Carbon Ions, performing treatments since September 2011. The extracted beam energy and intensity can vary over a wide range (60-250 MeV for Protons and 120-400 MeV/u for Carbon Ions, 4e6/10¹⁰ pps); the beam intensity uniformity during the slow extraction process is a fundamental requirement for achieving accurate and fast treatments. CNAO developed an online Fast Intensity Monitor (FIM), not perturbing the extracted beam, capable of measuring beam intensity with a bandwidth of 50kHz and a resolution of 1%. It consists of a thin (0.8 μm) metallic foil that emits secondary electrons when traversed by the beam. The electrons are multiplied by a Channeltron device, polarized at high voltage versus ground. The Channeltron output current is amplified and converted in a Pulse Width Modulated (PWM) signal, which is then decoupled and transmitted to the equipment room, where an FPGA implements a servo-spill. The work presents the detector, the floating electronics, the preliminary measurements with beam and the integration in a closed loop on the synchrotron air-core quadrupole obtaining promising results.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPHA050

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPHA051

Scintillating Fibers used as Profile Monitors for the CNAO HEBT Lines

910

E. Rojatti
UniPV, Pavia, Italy
J. Bosser, M. Haguenauer, P. Poilleux
CERN, Geneva, Switzerland
J. Bosser, G.M.A. Calvi, L. Lanzavecchia, A. Parravicini, M. Pullia, C. Viviani
CNAO Foundation, Milan, Italy
M. Caldara
University of Bergamo, Bergamo, Italy

The CNAO (Centro Nazionale di Adroterapia Oncologica) Foundation is the first Italian center for deep hadrontherapy with Protons and Carbon Ions. Several beam monitors exploiting the scintillation process have been designed to check the beam quality in the extraction lines, in order to guarantee patients safety. The SFH (Scintillating Fibers Harp), the QPM (Qualification Profile Monitor), and the SFP (Scintillating Fibers plus Photodiodes) are made up by two orthogonal scintillating fibers harps with not dead area for the horizontal and the vertical beam profiles measurement. The QPM and the SFH are both installed on the beam line and they use a CCD camera for the signal acquisition. The SFP is a SFH upgrade project aimed to replace the camera with two Photodiodes arrays coupled to the fibers in vacuum. The WD (Watch Dog) detector, not already installed, has been designed to check the beam position through the intensity of the beam tails. It uses two couples of scintillating fibers displaced transversally to the beam direction, coupled to four APDs (Avalanche Photodiodes). This work describes the beam detectors, their achieved performances and the most recent beam measurements.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPHA051

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)