Characterization of a silicon detector and front-end electronics prototype for single ion discrimination in hadrontherapy

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Dear Dr. Fausti,

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Meta Data

ContributionID #1721

Event 2018 IEEE Nuclear Science Symposium and Medical Imaging Conference

Format Abstract Submission

Language English

Topic New detectors developments

Prefered Presentation Type presentation as oral

Submission Status submitted

Your Contribution

Characterization of a silicon detector and front-end electronics

prototype for single ion discrimination in hadrontherapy

F. Fausti2, 3_{, G. Mazza}2_{, N. Cartiglia}2_{, M. Ferrero}2, 1_{, S. Giordanengo}2_{, O. H. Ali}2, 1_{, M. Mandurrino}2, 1_, V. Monaco2, 1_{, J. Olave}2, 3_{, V. Sola}2_{, A. Staiano}2_{, R. Sacchi}2, 1_{, A. Vignati}2, 1_{, R. Cirio}2, 1

1_{Università di Torino, Fisica, Torino, Italy}

2_{National Institute for Nuclear Physics, Torino, Italy}

3_{Politecnico di Torino, Electronics and Telecommunications, Torino, Italy}

Content

The Move-IT research project of the National Institute for Nuclear Physics aims at the study of models for biologically optimized treatment planning systems in particle therapy and the

development of dedicated devices for plan verifcation. On behalf of this collaboration, the Turin medical physics group is working for the development of a new prototype of silicon strips detector. This device, based on 50 µm thin silicon sensors with internal gain, aims to detect the single beam particle and count their number up to 109_cm2_{/s fuxes, with a precision ≥ 99%. The prototype}

detector will cover a 3x3 cm2_{area, segmented in strips. Te classic orthogonal strip positioning is used} for beam profle measures. At the moment, two types of sensor geometry with diferent silicon design features have been characterized with laser and radioactive sources. Further information about the sensor behavior have been achieved from a series of tests with the clinical proton beam of the CNAO hadrontherapy center in Pavia, Italy.

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For what concerns the front-end electronics, the challenging tasks are represented by the charge and dynamic range which are respectively the 3-150 fC and the hundreds of MHz instantaneous rate (at least 100 MHz, 250 MHz ideally). On this purpose, our group is exploring diferent solutions with the design of two prototypes of custom front-end electronics. One prototype is equipped with a high bandwidth transimpedance amplifer based on a diferential amplifer with resisitive load, gain boost current sources, and a resistive feedback. The other device solution is a fast charge sensitive amplifer based on a cascoded single ended amplifer with gain boost and a discrimination-activated reset of the feedback capacitance.

The design of the two diferent 24-channels ASIC prototypes has been submited on January 2018. An extensive characterization work is going to be performed on the ASICs standalone and the ASICs coupled with the sensors.

Silicon sensors,front-end electronics,particle therapy,fast counting

The following authors are allowed to edit the content of this contribution. Further instructions on how to do so are send via e-mail to the appropriate author.

 Federico Fausti  Roberto Sacchi

The following authors are allowed to view the contribution and its status by login into the abstract submission system using the mentioned e-mail address.

 Nicolò Cartiglia  Vincenzo Monaco  Roberto Cirio

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