TY - GEN
T1 - Commissioning of the new electronics and online system for the Super-Kamiokande experiment
AU - Yamada, S.
AU - Awai, K.
AU - Hayato, Y.
AU - Kaneyuki, K.
AU - Kouzuma, Y.
AU - Nakayama, S.
AU - Nishino, H.
AU - Okumura, K.
AU - Obayashi, Y.
AU - Shimizu, Y.
AU - Shiozawa, M.
AU - Takeda, A.
AU - Heng, Y.
AU - Yang, B.
AU - Chen, S.
AU - Tanaka, T.
AU - Yokozawa, T.
AU - Koshio, Y.
AU - Moriyama, S.
AU - Arai, Y.
AU - Ishikawa, K.
AU - Minegishi, A.
AU - Uchida, T.
PY - 2009/12/31
Y1 - 2009/12/31
N2 - 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 on a charge 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 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 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.
AB - 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 on a charge 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 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 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.
KW - Data acquisition
KW - Event building
KW - Front-end electronics
KW - Neutrinos
UR - http://www.scopus.com/inward/record.url?scp=72749100932&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=72749100932&partnerID=8YFLogxK
U2 - 10.1109/RTC.2009.5321856
DO - 10.1109/RTC.2009.5321856
M3 - Conference contribution
AN - SCOPUS:72749100932
SN - 9781424444557
T3 - 2009 16th IEEE-NPSS Real Time Conference - Conference Record
SP - 201
EP - 205
BT - 2009 16th IEEE-NPSS Real Time Conference - Conference Record
T2 - 2009 16th IEEE-NPSS Real Time Conference
Y2 - 10 May 2009 through 15 May 2009
ER -