The SpacePix-D radiation monitor technology demonstrator

Vrba, V.; Benka, T.; Fojtik, J.; Havránek, M.; Janoska, Z.; Kafka, V.; Marcisovska, M.; Marčišovský, M.; Neue, G.; Suchanek, Petr; Švihra, Peter; Sysala, R.; Tomášek, L.; Vančura, P.

doi:10.1088/1748-0221/13/12/c12017

Cited by 10 publications

(12 citation statements)

References 6 publications

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“…Wide fields of view without compromising the geometric resolution can be achieved, something that cannot be done with coarsely segmented Si diodes in telescopic configurations. Miniaturized telescopes based on partially depleted active Si pixel sensors using the Silicon on Insulator technology with heritage from x-ray imaging have been proposed and are developed (Vrba et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

GEANT4 simulation study of the response of a miniature radiation detector in Galactic Cosmic Rays and inside a spacecraft

Karafasoulis¹,

Papadimitropoulos

Potiriadis

et al. 2022

J. Space Weather Space Clim.

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The Miniaturized Detector for Application in Space (MIDAS) is a compact device with dimensions 5 x 5 x 1 cm 3 which combines position sensitive Si detectors and a fast neutrons spectrometer. MIDAS is developed with purpose to act as a linear energy transfer (LET) spectrometer for the charged particles and measure dose and dose equivalent from both charged particles and neutrons. It is based on fully depleted monolithic active Si pixel sensors for the charged track and energy deposition measurements, while a plastic scintillator read out by a silicon photomultiplier is used to determine energy depositions from fast neutrons. A simulation study of the detector response in galactic cosmic ray (GCR) radiation fields with the aid of GEANT4 has been performed. Energy depositions and hit pixel addresses have been used to reconstruct tracks and calculate LET spectra. A method to calculate in water from the measured LET has been elaborated. Dose rate in water and dose equivalent rate have been calculated. The energy and particle composition of the radiation field produced by the interaction of GCR with the Al walls of a spacecraft model has been determined and the response of MIDAS in this radiation field has been investigated.

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Section: Introductionmentioning

confidence: 99%

GEANT4 simulation study of the response of a miniature radiation detector in Galactic Cosmic Rays and inside a spacecraft

Karafasoulis¹,

Papadimitropoulos

Potiriadis

et al. 2022

J. Space Weather Space Clim.

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“…Single bit operation is described in [5]. The particular bit is set (1) with the signal bit_set. The delay between signals bit_set and bit_rdy ensures voltage setting on CDAC (2).…”

Section: Asynchronous Sar Logicmentioning

confidence: 99%

“…The proposed asynchronous analog to digital converter (ADC) design is used in the Spacepix-2 [1] application specific integrated circuit (ASIC). The Spacepix-2 is monolithic active pixel sensor (MAPS) detector dedicated to measuring an entered energy deposition of impinging particles.…”

Section: Introductionmentioning

confidence: 99%

“…ADC with successive approximation register (SAR) and charge redistribution architecture provides sufficient accuracy, low power consumption, and an acceptable layout area. The SAR ADC architecture is used in several MAPS detectors [1,3], with a pixel pitch of 60 μm. This article describes a new enhancement of the published 8-bit version [4] of column SAR ADC for MAPS detector from 8-bit to 10-bit.…”

Section: Introductionmentioning

confidence: 99%

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A low power asynchronous column-parallel 10-bit analog to digital converter with a high input impedance

et al. 2022

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This paper proposes a low power 10-bit asynchronous fully-differential column analog to digital converter (ADC) with successive approximation (SAR) and charge redistribution in a 180 nm SoI technology. The ADC is designed for use in Spacepix-2 monolithic active pixel sensor. A novel folded architecture of internal capacitive digital to analog converter (CDAC) is proposed. The total capacitance of CDAC is 512 fF, with a single unit capacitor capacitance only 0.5 fF and a size of 2.5 × 1.4 μm2. The total input capacitance of the proposed column ADC is only 220 fF. Two columns of a pixel matrix share a single ADC to double layout width. The layout area is 120 × 923 μm2. The sample rate is 4 MSps with power consumption of 225 μW from 1.8 V power supply.

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“…This work presents SpacePix2, an SOI MAPS detector for space weather monitoring. SpacePix2 architecture is based on the X-CHIP-03 SOI MAPS detector [1,4] implemented in the same 180 nm SOI CMOS technology. X-CHIP-03 can operate either in hit counting mode or measure deposited signal in a pixel from 1 ke − to 10 ke − .…”

Section: Introductionmentioning

confidence: 99%

SpacePix2: SOI MAPS detector for space radiation monitoring

Vančura

Gečnuk²,

Janoska³

et al. 2023

J. Inst.

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The SpacePix2 monolithic active pixel sensor (MAPS) is a novel ASIC for space radiation monitoring designed in a 180 nm SOI CMOS technology. The active sensor area is 3.84 × 3.84 mm2, pixel matrix is arranged as a 64 × 64 array with 60 µm pitch. The pixel front-end amplifier signal range is 2–80 ke−, extended up to 30 Me− using a backside channel. Diodes integrated in the handle wafer in each pixel are biased at −150 V. Impinging particle generates a charge pulse converted to voltage pulse by charge sensitive amplifier (CSA). Maximum voltage memorized by the peak detector hold (PDH) circuit is digitized using on-chip 10-bit asynchronous column SAR ADCs. Two readout interfaces are available, 400 MHz LVDS and 50 MHz SPI. Total power consumption is 43 mA from a 1.8 V power supply. The ASIC has been tested in space in low Earth orbit (LEO) and sample data are shown.

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The SpacePix-D radiation monitor technology demonstrator

Cited by 10 publications

References 6 publications

GEANT4 simulation study of the response of a miniature radiation detector in Galactic Cosmic Rays and inside a spacecraft

GEANT4 simulation study of the response of a miniature radiation detector in Galactic Cosmic Rays and inside a spacecraft

A low power asynchronous column-parallel 10-bit analog to digital converter with a high input impedance

SpacePix2: SOI MAPS detector for space radiation monitoring

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