This work presents the design and experimental validation of a photoacoustic setup that emulates the acoustic signal generated by a 20 MeV proton beam by ionoacoustic effect. This system serves as a practical tool to experimentally test ionoacoustic detectors in a simple yet representative setup prior to performing beam tests at accelerator facilities. To emulate the ionoacoustic effect the hereby presented Proton Sound Detector Testbench (ProSD-TB) uses a 70 W peak power pulsed laser and a specifically designed target absorber. The experimental validation of the ProSD-TB shows that it is capable to emulate a 20 MeV proton beam ionoacoustic signal in terms of signal amplitude (few Pa at the sensor surface) and frequency (2 MHz). The time domain signal generated by the ProSD-TB is acquired by means of a 64-ch Proton Sound Detector composed by a multichannel acoustic sensor, a dedicated analog front-end and signal processing. The ProSD-TB is validated against a 20 MeV ionoacoustic signal both in time domain and by comparing the 20 MeV dose deposition profile to an acoustic image generated by the Proton Sound Detector.
Vallicelli, E., Cosmi, M., Chirico, G., Collini, M., Baschirotto, A., De Matteis, M. (2020). Photoacoustic Sensing Instrumentation using 70 W 905 nm Pulsed Laser Source for Proton-Induced Thermoacoustic Effect Emulation. In Proceedings of IEEE Sensors (pp.1-4). Institute of Electrical and Electronics Engineers Inc. [10.1109/SENSORS47125.2020.9278915].
Photoacoustic Sensing Instrumentation using 70 W 905 nm Pulsed Laser Source for Proton-Induced Thermoacoustic Effect Emulation
Vallicelli E. A.
;Chirico G.;Collini M.;Baschirotto A.;De Matteis M.
2020
Abstract
This work presents the design and experimental validation of a photoacoustic setup that emulates the acoustic signal generated by a 20 MeV proton beam by ionoacoustic effect. This system serves as a practical tool to experimentally test ionoacoustic detectors in a simple yet representative setup prior to performing beam tests at accelerator facilities. To emulate the ionoacoustic effect the hereby presented Proton Sound Detector Testbench (ProSD-TB) uses a 70 W peak power pulsed laser and a specifically designed target absorber. The experimental validation of the ProSD-TB shows that it is capable to emulate a 20 MeV proton beam ionoacoustic signal in terms of signal amplitude (few Pa at the sensor surface) and frequency (2 MHz). The time domain signal generated by the ProSD-TB is acquired by means of a 64-ch Proton Sound Detector composed by a multichannel acoustic sensor, a dedicated analog front-end and signal processing. The ProSD-TB is validated against a 20 MeV ionoacoustic signal both in time domain and by comparing the 20 MeV dose deposition profile to an acoustic image generated by the Proton Sound Detector.
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