Readout, first- And second-level triggers of the new Belle silicon vertex detector

M. Friedl, R. Abe, T. Abe, H. Aihara, Y. Asano, T. Aso, A. Bakich, T. Browder, M. C. Chang, Y. Chao, K. F. Chen, S. Chidzik, J. Dalseno, R. Dowd, J. Dragic, C. W. Everton, R. Fernholz, H. Fujii, Z. W. Gao, A. GordonY. N. Guo, J. Haba, K. Hara, T. Hara, Y. Harada, T. Haruyama, K. Hasuko, K. Hayashi, M. Hazumi, E. M. Heenan, T. Higuchi, H. Hirai, N. Hitomi, A. Igarashi, Y. Igarashi, H. Ikeda, H. Ishino, K. Itoh, S. Iwaida, J. Kaneko, P. Kapusta, R. Karawatzki, K. Kasami, H. Kawai, T. Kawasaki, A. Kibayashi, S. Koike, S. Korpar, P. Križan, H. Kurashiro, A. Kusaka, T. Lesiak, A. Limosani, W. C. Lin, D. Marlow, H. Matsumoto, Y. Mikami, H. Miyake, G. R. Moloney, T. Mori, T. Nakadaira, Y. Nakano, Z. Natkaniec, S. Nozaki, R. Ohkubo, F. Ohno, S. Okuno, Y. Onuki, W. Ostrowicz, H. Ozaki, L. Peak, M. Pernicka, M. Rosen, M. Rozanska, N. Sato, S. Schmid, T. Shibata, R. Stamen, S. Stanič, H. Steininger, K. Sumisawa, J. Suzuki, H. Tajima, O. Tajima, K. Takahashi, F. Takasaki, N. Tamura, M. Tanaka, G. N. Taylor, H. Terazaki, T. Tomura, K. Trabelsi, W. Trischuk, T. Tsuboyama, K. Uchida, K. Ueno, K. Ueno, N. Uozaki, Y. Ushiroda, S. Vahsen, G. Varner, K. Varvell, Y. S. Velikzhanin, C. C. Wang, M. Z. Wang, M. Watanabe, Y. Watanabe, Y. Yamada, H. Yamamoto, Y. Yamashita, Y. Yamashita, M. Yamauchi, H. Yanai, R. Yang, Y. Yasu, M. Yokoyama, T. Ziegler, D. Zontar

Research output: Contribution to journalConference articlepeer-review

4 Scopus citations

Abstract

A major upgrade of the Silicon Vertex Detector (SVD 2.0) of the Belle experiment at the KEKB factory was installed along with new front-end and back-end electronics systems during the summer shutdown period in 2003 to cope with higher particle rates, improve the track resolution and meet the increasing requirements of radiation tolerance. The SVD 2.0 detector modules are read out by VAITA chips which provide "fast or" (hit) signals that are combined by the back-end FADCTF modules to coarse, but immediate level 0 track trigger signals at rates of several tens of a kHz. Moreover, the digitized detector signals are compared to threshold lookup tables in the FADCTFs to pass on hit information on a single strip basis to the subsequent level 1.5 trigger system, which reduces the rate below the kHz range. Both FADCTF and level 1.5 electronics make use of parallel real-time processing in Field Programmable Gate Arrays (FPGAs), while further data acquisition and event building is done by PC farms running Linux. The new readout system hardware is described and the first results obtained with cosmics are shown.

Original languageEnglish (US)
Pages (from-to)491-496
Number of pages6
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume535
Issue number1-2
DOIs
StatePublished - Dec 11 2004
EventProceedings of the 10th International Viennna Conference - Vienna, Austria
Duration: Feb 16 2004Feb 21 2004

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Instrumentation

Keywords

  • Belle
  • Silicon
  • Trigger
  • VAITA

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