1995 Fiscal Year Final Research Report Summary
Development of computation-intensive X-ray signal prcesssing system for X-ray calorimeter
Project/Area Number |
06640364
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Research Category |
Grant-in-Aid for General Scientific Research (C)
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Allocation Type | Single-year Grants |
Research Field |
Astronomy
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Research Institution | The Institute of Physical and Chemical Research (RIKEN) |
Principal Investigator |
KAWAI Nobuyuki RIKEN,Cosmic Radiation Laboratory Senior research scientist, 宇宙放射線研究室, 副主任研究員 (80195031)
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Co-Investigator(Kenkyū-buntansha) |
MIHARA Tatehiro RIKEN,Cosmic Radiation Laboratory Research scientist, 宇宙放射線研究室, 研究員 (20260200)
YOSHIDA Atsumasa RIKEN,Cosmic Radiation Laboratory Research scientist, 宇宙放射線研究室, 研究員 (80240274)
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Project Period (FY) |
1994 – 1995
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Keywords | X-ray detectors / X-ray spectra / Digital signal processing / Calorimeter / Bolometer / Data acquisition |
Research Abstract |
The purpose of this project is to develop a small computer system for time-series signal acquisition with real-time digital signal processing. The primary purpose of this system is the acquisition and real-time digital processing of signals from X-ray calorimeter. Taking advantage of the fact that the signals from X-ray calorimeter have characteristic timescale similar to the audio signals, we used the signal processing workstation ISPW (IRCAM Signal Processing Workstation), which was originally developed for real-time music/sound synthesis, for the measurements of X-ray signals from X-ray calorimeter. With this system, we acquired the signal from the X-ray calorimeter, applied digital filters, and then recorded the results on the computer files. We have demonstrated that the signal processing procedures can be built using the visual programming language combined with fast mathematical libraries. The X-ray calorimeter signals from the amplifier output are fed to the analog-to-digital converter, and the digital signal is transferred to ISPW via its DSP port interface. The ISPW performs the digital processing, and the results are visually displayd or written to the files on the host (NeXT Cube) computer. Originally we planned to build the software from scratch. We found, however, that the visual programming language "Max", developed for sound/music synthesis is capable, and actually suitable for event-driven signal processing. With Max, it is easy to construct a system to analyze time-series data, and is useful as a prototyping tool for the real-time time-series signal analysis on astronomical satellites.
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