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Laboratory calibration measurements of a piezoelectric lead zirconate titanate cosmic dust detector at low velocities |
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| Authors: | S Takechi K Nogami T Miyachi M Fujii N Hasebe T Iwai S Sasaki H Ohashi H Shibata E Grün R Srama N Okada |
| Institution: | 1. Graduate School of Engineering, Osaka City University, Osaka 558-8585, Japan;2. Department of Physics, Dokkyo University School of Medicine, Tochigi 321-0293, Japan;3. Advanced Research Institute for Science and Engineering, Waseda University, Tokyo 169-8555, Japan;4. Research Center for Nuclear Science and Technology, The University of Tokyo, Ibaraki 319-1106, Japan;5. National Astronomical Observatory of Japan, Iwate 023-0861, Japan;6. Faculty of Marine Science, Tokyo University of Marine Science and Technology, Tokyo 108-8477, Japan;g Graduate School of Engineering, Kyoto University, Kyoto 606-8501, Japan;h Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany;i Honda Electronics Co. Ltd., Aichi 441-3193, Japan |
| Abstract: | A cosmic dust monitor for use onboard a spacecraft is currently being developed using a piezoelectric lead zirconate titanate element (PZT). Its characteristics of the PZT sensor is studied by ground-based laboratory impact experiments using hypervelocity particles supplied by a Van de Graaff accelerator. The output signals obtained from the sensor just after the impact appeared to have a waveform that was explicitly related to the particle’s impact velocity. For velocities less than ∼6 km/s, the signal showed an oscillation pattern and the amplitude was proportional to the momentum of the impacting particle. For higher velocities, the signal gradually changed to a single waveform. The rise time of this single waveform was proportional to the particle’s velocity for velocities above ∼6 km/s. The present paper reports on results for the low velocity case and especially discusses the effect of an outer coating of the sensor with a paint, which is used to reduce heating by solar radiation. |
| Keywords: | Cosmic dust Dust detector Piezoelectricity Lead zirconate titanate (PZT) BepiColombo mission Mercury Dust Monitor (MDM) |
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