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Temperature dependence of the time resolution in a SiPM-readout plastic scintillator for cosmic-ray applications
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This study isn't about human health or microplastics—it's actually physics research testing detectors used to study cosmic rays (high-energy particles from space) aboard balloons and spacecraft. Researchers found that a specific type of particle detector kept working accurately even when temperatures swung from -20°C to 20°C, which matters for scientists because it means these instruments can reliably measure fast-moving particles even in the extreme temperature changes experienced during flight. While this doesn't directly relate to consumer health, it helps advance our understanding of space radiation, which is relevant to astronaut safety and spacecraft design.
Balloon- and space-borne cosmic-ray experiments employ plastic scintillators read out by silicon photomultipliers (SiPMs) to achieve picosecond-level time resolutions for triggering and particle identification. The performance of these systems can be affected by temperature variations encountered in flight. In this work, a time–of–flight (TOF) prototype consisting of a BC-418 plastic scintillator bar coupled to Onsemi MICROFC-30050 SiPMs was constructed and tested under a controlled thermal environment between –20 and 20 °C. Electrons from a 90 Sr source were used as a beam, and a dedicated differential preamplifier and coincidence triggering were implemented to study the detector response. A minimum time resolution of the averaged timestamp of 160 ps was achieved at an overvoltage of 3 V, remaining stable across the tested temperature range and uniform along the scintillator bar.
More Papers Like This
Performance of the fiber tracker of the Zirè detector onboard NUSES satellite
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This paper isn't actually about human health or microplastics—it's about space technology. Researchers are building and testing a new type of particle detector for a satellite (NUSES) that will study cosmic radiation, using plastic fibers and tiny light sensors instead of traditional silicon-based detectors. This matters for space science because it could lead to lighter, more efficient tools for studying radiation in space, which indirectly helps us understand risks to astronauts and equipment from cosmic rays—but it has no direct connection to microplastics or everyday consumer health.
Study of microplastics with semicrystalline and amorphous structure identification by TGA and DSC.
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Scientists tested lab methods that use heat to identify different types of microplastics, the tiny plastic bits found in water, food, and even our bodies. This matters because knowing exactly which plastics are present could help researchers better understand health risks, since the technique worked well for most common plastics but struggled to tell two specific types apart.
Microplastics in the cryosphere - a potential time bomb?
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The study reviews the presence of microplastics in the cryosphere, including snow, glaciers, sea ice, and permafrost, noting that microplastic fibers from human clothing and activities can travel long distances through the atmosphere. Researchers warn that trapped microplastics may reduce ice albedo and accelerate melting, and that glacial ice could store these particles for thousands of years before releasing them.
[Aging Mechanism and Release Characteristics of Dissolved Substances of Polypropylene Microplastics Under the Combined Action of Light and Freeze-thaw Cycles].
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Scientists studied how sunlight and repeated freezing-and-thawing (like what happens in cold climates) break down common plastic (polypropylene) into smaller pieces called nanoplastics. They found that sunlight alone caused plastic to break into more, smaller nanoplastic particles over time, while freezing and thawing actually had the opposite effect, producing fewer but larger particles. This matters because it shows that how plastic breaks down—and how tiny the resulting particles get—depends heavily on climate conditions, which affects how much of these particles might end up in our water, soil, and eventually our bodies.
Rate-Controlling Microplastic Processes during Plastic Flow in FCC Metals: Origin of the Variation of Strain Rate Sensitivity in Aluminum from 78 to 300 K
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This materials science study examines the temperature dependence of deformation mechanisms in aluminum, specifically how strain rate sensitivity changes from cryogenic to room temperature — not related to microplastics or environmental health.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.