First performances of EICROC ASIC to read-out pixelated AC-LGAD sensors for the Electron-Ion Collider (EIC)

European Nuclear Physics Conference 2025 Abstract ID : 223 First performances of EICROC ASIC to read-out pixelated AC-LGAD sensors for the Electron-Ion Collider (EIC) Content A. Sharma1, G. D’Amen2, F. Bouyjou3, O. Brand-Foissac1, V. Chaumat1, W. Chen2, S. Conforti4, T. Cornet1, F. Dulucq4, S. Extier4, G. Giacomini2, K. Hara5, A. Ikbal6, T. Imamura5, M. Idzik7, A. Jentsch2, S. Kita5, B.-Y. Ky1, D. Marchand1, J. Moron7, K. Nakamura8, S. Paul2, P. Shanmuganathan2, N. Seguin-Moreau4, L. Serin1, D. Thienpont4, C. de La Taille4, A.-S. Torrento-Coello1, P. Tribedy2, A. Tricoli2, A. Verplancke4 1Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay 91405, France 2Brookhaven National Laboratory, 11973 Upton, NY, U.S.A. 3Université Paris-Saclay, CEA, IRFU, Centre CEA Paris-Saclay, Gif-sur-Yvette 91191, France 4OMEGA, CNRS, École Polytechnique, Institut Polytechnique de Paris, Palaiseau 91120, France 5University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8571, Ibaraki, Japan 6Kent State University, 44242 Kent, OH, U.S.A. 7AGH University of Science and Technology, al. Adama Mickiewicza, 30-059 Kraków, Poland 8High Energy Research Organization (KEK), 1-1 Oho, Tsukuba, 305-0801, Ibaraki, Japan Finding the answers to the long-standing questions, such as, emergence of mass and spin of the proton from partons, saturation of gluon density, and gluon momentum distribution inside the proton and nuclei, motivated the EIC [1] to be developed at Brookhaven National Laboratory, USA. The first EIC detector, ePIC (electron Proton-Ion Collision experiment), is comprised of a central barrel detector, as well as extensive beamline detectors in the outgoing electron (far-backward) and hadron (far-forward) beam directions. The far-forward (FF) detectors include Roman pots, which are placed inside vacuum and are intended to detect protons and ions scattered at very small angles (~ 5 mrad) in the forward direction, at ~30m downstream from the interaction point. The main goal of the FF detectors is to tag exclusive and diffractive events and to reconstruct their transverse momentum with a resolution of ~ 10 MeV/c. This is obtained by developing a new generation of 4D tracking sensors, pixelated AC-LGADs (capacitively-coupled Low-Gain Avalanche Diode, pixel of 500x500 µm2) [2][3] capable of providing the required spatial (less than 50 µm relying on charge sharing among pixels) and timing (~ 30 ps) resolutions. After these AC-LGADs have been read-out using ALTIROC0 [4] as a first attempt, an optimized read-out chip, EICROC (32x32 pads), is being designed by OMEGA and the characterization of the first prototype, EICROC0 (4x4 pads) [5], coupled to an AC-LGAD sensor is being performed at IJCLab. The EICROC0 is a system-on-chip with analog and digital processing including for each of the 16 channels a fast low-noise trans-impedance preamplifier, followed by two paths: a fast path with a discriminator connected to a 10-bit Time-to-Digital Converter (CEA/Irfu) for time measurement (ToA) with a 25 ps accuracy; and a slow path with shaper connected to an 8-bit 40 MHz successive approximation Analog-to-Digital Converter (AGH Krakow) providing amplitudes. The performances of pixelated AC-LGAD sensors read-out by EICROC0, obtained from preamplifier as well as digital (TDC and ADC) data and relying on measurements with the internal charge injection system, a Beta source and an infrared laser, will be presented. Acknowledgement: This work is benefitting from support from the French Agence Nationale de la Recherche (ANR), under grant ANR-24-CE31-5571 (project ROAD_4_EIC). References: [1] R. Abdul Khalek et al., “Science Requirements and Detector Concepts for the Electron-Ion Collider: EIC Yellow Report”, Nucl. Phys. A 1026 (2022). [2] G. Giacomini et al., “Fabrication and performance of AC-coupled LGADs”, JINST 14 (2019), P09004. [3] S. Kita et al., “Optimization of capacitively coupled Low Gain Avalanche Diode (AC-LGAD) sensors for precise time and spatial resolution”, NIM A 1048 (2023) 168009. [4] G. D’Amen et al., “Signal formation and sharing in AC-LGADs using the ALTIROC0 front-end chip”, JINST 17 (2022) P11028. [5] A. Verplancke et al., “EICROC: an ASIC to read-out the AC-LGAD sensors for the Electron-Ion Collider (EIC)”, contribution to the proceedings of the Topical Workshop on Electronics for Particle Physics, Sept. 30th –Oct. 04th, 2024, Glasgow, UK, to be published in JINST 2025. Authors: SHARMA, Arzoo (IJCLab, Université Paris-Saclay, CNRS/IN2P3, Orsay);TRIBEDY, P. (Brookhaven National Laboratory, 11973 Upton, NY, U.S.A.) Co-authors: BOUYJOU, F. (Université Paris-Saclay, CEA, IRFU, Centre CEA Paris-Saclay, Gif-sur-Yvette 91191, France);BRAND-FOISSAC, O. (Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay 91405, France);CHAUMAT, V. (Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay 91405, France);CHEN, W. (Brookhaven National Laboratory, 11973 Upton, NY, U.S.A.);CONFORTI, S. (OMEGA, CNRS, École Polytechnique, Institut Polytechnique de Paris, Palaiseau 91120, France);CORNET, T. (Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay 91405, France);D’AMEN, G. (Brookhaven National Laboratory, 11973 Upton, NY, U.S.A.);DULUCQ, F. (OMEGA, CNRS, École Polytechnique, Institut Polytechnique de Paris, Palaiseau 91120, France);EXTIER, S. (OMEGA, CNRS, École Polytechnique, Institut Polytechnique de Paris, Palaiseau 91120, France);GIACOMINI, G. (Brookhaven National Laboratory, 11973 Upton, NY, U.S.A.);HARA, K. (University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8571, Ibaraki, Japan);IDZIK, M. (AGH University of Science and Technology, al. Adama Mickiewicza, 30-059 Kraków, Poland);IKBAL, A. (Kent State University, 44242 Kent, OH, U.S.A.);IMAMURA, T. (University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8571, Ibaraki, Japan);JENTSCH, A. (Brookhaven National Laboratory, 11973 Upton, NY, U.S.A.);KITA, S. (University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8571, Ibaraki, Japan);KY, B.-Y. (Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay 91405, France);MARCHAND, D. (Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay 91405, France);MORON, J. (AGH University of Science and Technology, al. Adama Mickiewicza, 30-059 Kraków, Poland);NAKAMURA, K. (High Energy Research Organization (KEK), 1-1 Oho, Tsukuba, 305-0801, Ibaraki, Japan);PAUL, S. (Brookhaven National Laboratory, 11973 Upton, NY, U.S.A.);SERIN, L. (Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay 91405, France);SHANMUGANATHAN, P. (Brookhaven National Laboratory, 11973 Upton, NY, U.S.A.);SIGUIN-MOREAU, N. (OMEGA, CNRS, École Polytechnique, Institut Polytechnique de Paris, Palaiseau 91120, France);THIENPONT, D. (OMEGA, CNRS, École Polytechnique, Institut Polytechnique de Paris, Palaiseau 91120, France);TORRENTO-COELLO, A.-S. (Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay 91405, France);TRICOLI, A. (Brookhaven National Laboratory, 11973 Upton, NY, U.S.A.);VERPLANCKE, A. (OMEGA, CNRS, École Polytechnique, Institut Polytechnique de Paris, Palaiseau 91120, France);DE LA TAILLE, C. (OMEGA, CNRS, École Polytechnique, Institut Polytechnique de Paris, Palaiseau 91120, France) Presenter: SHARMA, Arzoo (IJCLab, Université Paris-Saclay, CNRS/IN2P3, Orsay) Track Classification: Accelerators and Instrumentation Contribution Type: Oral Presentation Submitted by SHARMA, Arzoo <[email protected]> on Tuesday 1 April 2025 Last modified: Tuesday 1 April 2025