Commissioning of the new electronics and online system for the Super-Kamiokande experiment

被引：2

作者：

Yamada, S. ^{[1
]}

Awai, K. ^{[1
]}

Hayato, Y. ^{[1
]}

Kaneyuki, K. ^{[1
]}

Kouzuma, Y. ^{[1
]}

Nakayama, S. ^{[1
]}

Nishino, H. ^{[1
]}

Okumura, K. ^{[1
]}

Obayashi, Y. ^{[1
]}

Shimizu, Y. ^{[1
]}

Shiozawa, M. ^{[1
]}

Takeda, A. ^{[1
]}

Heng, Y. ^{[2
]}

Yang, B. ^{[3
]}

Chen, S. ^{[2
]}

Tanaka, T. ^{[4
]}

Yokozawa, T. ^{[1
]}

Koshio, Y. ^{[1
]}

Moriyama, S. ^{[1
]}

Arai, Y. ^{[5
]}

Ishikawa, K. ^{[6
]}

Minegishi, A. ^{[6
]}

Uchida, T. ^{[7
]}

机构：

[1] Univ Tokyo, Inst Cosm Ray Res, Chiba 2778582, Japan

[2] Tsinghua Univ, Dept Engn Phys, Beijing 30013, Peoples R China

[3] Seoul Natl Univ, Dept Phys, Seoul 151742, South Korea

[4] Nagoya Univ, Solar Terrestrial Environm Lab, Nagoya, Aichi 4648602, Japan

[5] High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan

[6] Iwatsu Test Instruments Corp, Tokyo 1688501, Japan

[7] Univ Tokyo, Tokyo 1130033, Japan

来源：

2009 16TH IEEE-NPSS REAL TIME CONFERENCE | 2009年

关键词：

Front-end electronics; Neutrinos; Event building; Data acquisition;

D O I：

10.1109/RTC.2009.5321856

中图分类号：

TP3 [计算技术、计算机技术];

学科分类号：

0812 ;

摘要：

The Super-Kamiokande (SK) detector is a ring imaging Cherenkov detector for neutrino physics and proton-decay search and consists of 50000 tons of pure water equipped with about 13000 photo-multipliers (PMTs). 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 oil a char-e to time converter (QTC) and a multi-hit TDC. TCP/IP based readout channel is implemented to handle large amounts of data. In the new, data acquisition (DAQ) scheme, the hardware event-trigger for the data reduction is replaced by processing all file 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 tip to 470MB/s, we utilize Gigabit and 10Gigabit Ethernet techniques 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.

引用

页码：201 / +

页数：2

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