Discrimination and binning logic of charged particle monitor for a nano-satellite

Name: Mude, Ram

Organization : College of Engineering, Pune. Electronics and Telecomm. Dept

Email : ramdmude3061@gmail.com

Name: Salunke, Abhishek

Organization : College of Engineering, Pune. Electronics and Telecomm. Dept

Email : salunkeac19.extc@coep.ac.in

Name: Atre, Suhrud

Organization : College of Engineering, Pune. Electronics and Telecomm. Dept

Email : atress20.extc@coep.ac.in

keyword: Charged particle monitor

ThaSH: Nanosatellites

; Discrimination logic

ThaSH: Particles -- Measurement

ThaSH: Discrimination

Abstract: This paper presents the discrimination and binning logic circuit of the Charged Particle Monitor (CPM) -utility of mission- onboard COEPSAT-2, a nanosatellite created by students at College of Engineering, Pune with the scientific goal of demonstrating orbit raising from 700 km to 1200 km via solar sailing. Radiation effects of charged particles such as Xrays, gamma rays, and high-energy charged particles include Total Ionizing Dose, Single Event Effects, and latch-ups. These effects can result in performance degradation or even mission failure. The CPM aims to generate a consistent dataset of charged particle environment at the above-mentioned altitude range. The charged particle environment model can then be used by designers to mitigate radiation effects and improvise their spacecrafts to withstand the space environment. The Charged Particle Monitoring system tracks protons in the upper ionosphere with energies ranging from 10 to 100 MeV. An aluminum window and three detectors, namely a coincidence detector, a scintillation detector, and an anti-coincidence detector, constitute the designed charged particle monitor. Up to particle energy of 100 MeV, the relationship between incident particle energy and energy deposited in the scintillation detector is linear. When the particle of energy greater than 100 MeV is incident on the scintillation detector, it will deposit energy which is less than the energy deposited by a particle of 100 MeV in the detector. This results in the false detection of particle. When passive shielding is avoided, it becomes necessary to distinguish between particles with energies ranging from 10 to 100 MeV and those with energies greater than 100 MeV. Filtering the noise in the signal chain from the scintillation detector's signal conditioning circuit to obtain the best peak value is also required to deal with low amplitude signals. The proposed discrimination and binning logic aims to classify incoming particles as having energy in the range of 10 MeV to 100 MeV or having energy greater than 100 MeV, as well as digitizing the value of peaks to store particle data in energy bins. For the detection of particles with energies greater than 100 MeV, the anti-coincidence detector is placed after the scintillation detector. When a particle passes through both the coincidence and anti-coincidence detectors, the short current pulses are converted and processed to generate a voltage pulse, indicating that the particle has more than 100 MeV energy. The processed signal chain from the scintillation detector predominantly comprises information on the incident proton's energy, which is inferred from the pulse's peak. The signal chain is sampled using an Analog to Digital converter, and the noise is digitally filtered to get the peak's optimal value. By implementing binning logic, peaks are stored in energy bins of specific energy ranges, together with the satellite's time-stamp and altitude data. By employing two silicon detectors (coincidence and anti-coincidence detectors), the unique detector design removes the need for substantial passive shielding, resulting in a significantly smaller overall CPM. The proposed discrimination and binning logic can be implemented by any detector housed in a nanosatellite.

King Mongkut's University of Technology North Bangkok. Central Library

Address: BANGKOK

Email: library@kmutnb.ac.th

Created: 2023

Modified: 2024-12-09

Issued: 2024-12-09

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BibliograpyCitation : In Electrical Engineering Academic Association (Thailand), Mahasarakham University. Faculty of Engineering and ASEFA. The 2023 International Electrical Engineering Congress (iEECON 2023) (pp.300-305). Mahasarakham : Mahasarakham University

eng

©copyrights King Mongkut's University of Technology North Bangkok

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