arXiv subjects

Felipe Soriano

Publications and source records attributed to Felipe Soriano.

4 recordsLinked to original sources

arXiv2026

FPGA-based TDC for SiPM Timing and Amplitude Measurements

Silicon photomultipliers (SiPMs) are widely used in photon-counting applications, such as positron emission tomography or particle physics, where precise timestamps and photoelectron number information are both required. In this work, a Time-to-Digital Converter with amplitude measurement capabilities was designed using an Artix-7 XC7A35T FPGA. For amplitude measurements, the internal xADC of the FPGA was chosen over other alternatives for simplicity. This design has two channels and can operate in timestamp-only mode or timestamp + amplitude mode. In turn, channels can be operated independently or in coincidence. The Integral Non-Linearity and Differential Non-Linearity of the design were studied, along with its time resolution, which is $(19 \pm 1)$ ps. Using a CAEN DT5810 pulse emulator, the design was tested further in timing-only mode, timing + amplitude mode and in coincidence mode to showcase its performance when using Poisson distributed SiPM-like pulses of various amplitudes.

physics.ins-det↗

arXiv2026

Front End Amplifiers for Simultaneous Dual Readout of SiPM Sensors

In this work, we present two fully open Analog Front End (AFE) designs for the simultaneous readout of the standard and fast outputs of ONSemi MicroFC-10035 Silicon Photomultipliers and report their main figure-of-merit parameters. The standard output AFE has a 1 p.e. amplitude of $(394 \pm 1)$ mV, which results in a Signal-to-Noise ratio of 30 dB. In addition, the fast AFE has a rise time of $(1.3\pm 0.1)$ ns and a median electronic jitter of $34^{+7}_{-5}$ ps, resulting in an excellent timing performance. Using these amplifiers for simultaneous dual readout, we demonstrate a proof-of-concept application, in which fast output timing information is used to suppress correlated noise events or pileup events present in the standard output charge measurements. This suppression results in a reduction of non-prompt correlated noise (delayed crosstalks and afterpulses) in dark conditions and an increase up to $\sim$14 in single photon discrimination under a continuous incident photon rate of 7.8 MHz/mm$^2$. These results show that dual SiPM readout provides a practical way to remove correlated noise or pileup contamination in standard output charge measurements on an event-by-event basis.

physics.ins-det↗

arXiv2025

Design and characterization of a fast output amplifier for Silicon Photomultipliers

A voltage amplifier, based on the BFU500XRR NPN transistor in a common-emitter configuration, was developed for the readout of the fast output of an ONSEMI MicroFC-10035 Silicon Photomultiplier (SiPM). This amplifier was tested and characterized under dark and illuminated SiPM conditions. For the design presented in this work, a Gain of $(20.0 \pm 0.7)$ dB and a rise time of $(768 \pm 10)$ ps were achieved for one amplifier stage and a Gain of $(38.3 \pm 0.7)$ dB and rise time of $(1155 \pm 16)$ ps was achieved for two cascaded stages. In addition, the linearity of both topologies was verified and the measured Signal-to-Noise Ratio (SNR) was ($21.9 \pm 0.4$) dB and ($18.8 \pm 0.5$) dB for the one-stage and two-stage amplifiers, respectively. This design provides a cheap and scalable (weight and size) alternative to other fast output amplifiers that are used when operating SiPMs fast outputs. These characteristics make this design ideal for space applications.

physics.ins-det↗

arXiv2025

Characterization of the SiPiC Payload for Photon Detection from Space

In this work, the SiPiC (SiPM Pinhole Camera) Payload is detailed. This Payload will potentially be integrated in two distinct satellite missions, which will operate in Low Earth Orbit (LEO) and in a High Altitude Orbit (HAO), respectively. The SiPiC Payload has two main objectives: to test Silicon Photomultipliers (SiPMs) as visible light sensors for stimuli originating from Earth; and to perform an in-orbit validation (IOV) of the new generation of PC104-compliant LabOSat subsystems. Preliminary measurements of the Payload's operational capabilities are performed and discussed. These include payload telemetry analysis, Field-of-View tests for the Earth imaging SiPM subsystem, and performance evaluations of the new LabOSat modules for known devices under test. The measured Angular Field of View (AFOV) for the light gathering SiPM subsystem is $(6.2 \pm 0.5)^{\mathrm{o}}$, which results in a FOV of $(4333 \pm 350)$ km on the surface of the Earth at 40000 km altitude and $(54 \pm 5)$ km at 500 km altitude.

physics.ins-det↗