Fly to the Universe - Proton Radiation Verification
Published：2024-04-02 14:46
【Technical Introduction】
Cosmic radiation consists of protons, electrons, and heavy particles. For satellites in low Earth orbit, proton radiation takes the majority (over 95%) of the radiation. When protons irradiate electronic components of satellite systems, such as controllers and memories, they generate significant noise currents, leading to temporary malfunctions or electronic components damage that may affect the ability of satellites to continue their missions.
To address this issue, NARI has utilized its existed cyclotron which provides a 30 MeV (mega-electron-volt) proton, to develop the proton irradiation platform for space components, and establish two-dimensional proton beam distribution measurement technologies (as shown in Figure 1). This enables precise tests of small samples, such as chips, for proton radiation verification.
Additionally, NARI has developed large-area proton radiation exposure technologies (as shown in Figure 2) employing a six-axis robotic arm to move samples and utilizing a zigzag scanning method (as shown in Figure 3). This allows for extensive proton irradiation within a 30 cm x 30 cm area suitable for the test of circuit boards, optoelectronic components and modules, and similar components. The proton irradiation distribution uniformity is within ±10%, meeting the requirements of verification specifications (as shown in Figure 4)
Figure 1. 2D Proton Beam Distribution Measurement Technology
Figure 2. Large-Area Proton Radiation Exposure Technology
Figure 3. Z-Shaped Scanning Method for Irradiating Test Samples
Figure 4. Simulation Technology for Large-Area Proton Radiation Exposure
【Project Planning/Technical Applications】
In recent years, the 30 MeV cyclotron in NARI has been used as a proton irradiation platform for functional tests of space components when bombarded by cosmic radiation. This platform integrates the efforts from industry, academic world and other research institutes and successfully supports several technical service projects. The collaboration has positioned NARI as one of the domestic service providers of proton irradiation for space components. Aligned with national policies, NARI will continue to enhance radiation environment verification technology for space components, fostering the development of Taiwan's space-related industries and approaching the goal of autonomous critical space component development.
【Future Development】
By integrating the existing 30 MeV cyclotron together with the upcoming 70 MeV cyclotron scheduled to be in operation in 2026, NARI will provide test services at different energy levels. NARI will also develop a proton energy modulation module and a vacuum environment coupling platform to simulate space environments with energies below 70 MeV. The step-by-step strategy of installing radiation verification facilities aims to assist academic study, industrial applications, and other research institutions through conducting related tests and research activities.
【Contact Information】
Name：Tsung-Te Lin
Phone：03-4711400#3397
E-mail：ttlin@nari.org.tw |
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