Commissioning of the new electronics and online system for the Super-Kamiokande experiment
| Autor: | K. Kaneyuki, T. Yokozawa, Atsushi Takeda, Takaaki Tanaka, Shoei Nakayama, Y. Kouzuma, H. Nishino, S. Yamada, Y. Hayato, B. Yang, Shaomin Chen, Shigetaka Moriyama, Masato Shiozawa, Yoshio Arai, Yusuke Koshio, K. Ishikawa, T. Uchida, Y. Heng, Y. Shimizu, K. Awai, A. Minegishi, Kimihiro Okumura, Y. Obayashi |
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| Rok vydání: | 2009 |
| Předmět: |
Ethernet
Physics Nuclear and High Energy Physics Physics::Instrumentation and Detectors Project commissioning business.industry Detector Local area network Electrical engineering Front end electronics Ring-imaging Cherenkov detector Time-to-digital converter Data acquisition Nuclear Energy and Engineering Gigabit Nuclear electronics Electronic engineering Electronics Electrical and Electronic Engineering Neutrino Super-Kamiokande business Computer hardware |
| Zdroj: | 2009 16th IEEE-NPSS Real Time Conference. |
| Popis: | The Super-Kamiokande detector is a ring imaging Cherenkov detector for neutrino physics and proton-decay search and consists of 50 000 tons of pure water equipped with about 13 000 photo-multipliers. The old front-end electronics and online system running for more than one decade were all upgraded in September, 2008 and the data acquisition was started successfully. The new front-end electronics is based on a charge to time converter and a multi-hit Time to Digital converter. TCP/IP based readout channel is implemented to handle large amounts of data. In the new data acquisition scheme, the hardware event-trigger for the data reduction is replaced by processing all the hits in the online farm, so that we are able to lower the threshold of the detection energy for solar neutrino and analyze consecutive events whose time interval is too long to detect in the previous system. To make the new online system to be capable of processing larger dataflow of up to 470 MB/s, we utilize Gigabit and 10-Gigabit Ethernet technologies and distribute the load over Linux PCs to handle a large amount of data. In this paper, we will describe the design and performance of the new system in the commissioning. |
| Databáze: | OpenAIRE |
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