New data acquisition system for the focal plane polarimeter of the Grand Raiden spectrometer
- Kyoto Univ. (Japan). Dept. of Physics
- Osaka Univ., Ibaraki (Japan). Research Center for Nuclear Physics
This paper describes a new data acquisition system for the focal plane polarimeter of the Grand Raiden spectrometer at the Research Center for Nuclear Physics (RCNP) in Osaka, Japan. Data are acquired by a Creative Electronic Systems (CES) Starburst, which is a CAMAC auxiliary crate controller equipped with a Digital Equipment Corporation (DEC) J11 microprocessor., The data on the Starburst are transferred to a VME single-board computer. A VME reflective memory module broadcasts the data to other systems through a fiber-optic link. A data transfer rate of 2.0 Mbytes/s between VME modules has been achieved by reflective memories. This rate includes the overhead of buffer management. The overall transfer rate, however, is limited by the performance of the Starburst to about 160 Kbytes/s at maximum. In order to further improve the system performance, the authors developed a new readout module called the Rapid Data Transfer Module (RDTM). RDTM`s transfer data from LeCroy PCOS III`s or 4298`s, and FERA/FERET`s directly to CES 8170 High Speed Memories (HSM) in VME crates. The data transfer rate of the RDTM from PCOS III`s to the HSM is about 4 Mbytes/s.
- Sponsoring Organization:
- National Science Foundation, Washington, DC (United States); Japan Society for the Promotion of Science, Tokyo (Japan)
- OSTI ID:
- 413368
- Journal Information:
- IEEE Transactions on Nuclear Science, Vol. 43, Issue 5; Other Information: PBD: Oct 1996
- Country of Publication:
- United States
- Language:
- English
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