In a medical accelerator, real-time monitoring systems of the beam and dose delivered to the patient are mandatory. In this work, we present a compact current profile detector that has been designed and tested in the framework of the TOP-IMPLART (Intensity Modulated Proton Linear Accelerator for RadioTerapy) project. This project foresees the realization of a proton linear accelerator, currently under construction at ENEA Frascati, for proton therapy applications. The linac produces a pulsed proton beam with 3 µs duration at 50 Hz repetition rate with a pulse current between 0.5 and 50 μA. A large dynamic range and spatial constraints make the use of usual noninterceptive beam diagnostics unfeasible. Therefore, the use of a beam current monitor based on a passive RF cavity working in the TM010 mode has been proposed. This paper reports the electromagnetic design of the device guided by a simplified analytical model. A prototype of such a device has been realized, characterized, and tested on the linac with a 35 MeV beam varying the beam current. The test results in air and in vacuum, together with the signal detection systems used, are presented.

Design and test of a compact beam current monitor based on a passive RF cavity for a proton therapy linear accelerator / Cardelli, F.; Ampollini, A.; Bazzano, G.; Nenzi, P.; Piersanti, L.; Ronsivalle, C.; Picardi, L.. - In: REVIEW OF SCIENTIFIC INSTRUMENTS. - ISSN 0034-6748. - 92:(2021), pp. 1-12. [10.1063/5.0062509]

Design and test of a compact beam current monitor based on a passive RF cavity for a proton therapy linear accelerator

Cardelli, F.
Primo
;
Bazzano, G.
;
Piersanti, L.;
2021

Abstract

In a medical accelerator, real-time monitoring systems of the beam and dose delivered to the patient are mandatory. In this work, we present a compact current profile detector that has been designed and tested in the framework of the TOP-IMPLART (Intensity Modulated Proton Linear Accelerator for RadioTerapy) project. This project foresees the realization of a proton linear accelerator, currently under construction at ENEA Frascati, for proton therapy applications. The linac produces a pulsed proton beam with 3 µs duration at 50 Hz repetition rate with a pulse current between 0.5 and 50 μA. A large dynamic range and spatial constraints make the use of usual noninterceptive beam diagnostics unfeasible. Therefore, the use of a beam current monitor based on a passive RF cavity working in the TM010 mode has been proposed. This paper reports the electromagnetic design of the device guided by a simplified analytical model. A prototype of such a device has been realized, characterized, and tested on the linac with a 35 MeV beam varying the beam current. The test results in air and in vacuum, together with the signal detection systems used, are presented.
2021
RF cavity; linac; proton; current detector
01 Pubblicazione su rivista::01a Articolo in rivista
Design and test of a compact beam current monitor based on a passive RF cavity for a proton therapy linear accelerator / Cardelli, F.; Ampollini, A.; Bazzano, G.; Nenzi, P.; Piersanti, L.; Ronsivalle, C.; Picardi, L.. - In: REVIEW OF SCIENTIFIC INSTRUMENTS. - ISSN 0034-6748. - 92:(2021), pp. 1-12. [10.1063/5.0062509]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1585001
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