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3rd Open Meeting for the Hyper-Kamiokande Project

Jun 21 – 22, 2013
Asia/Tokyo timezone

Contribution List

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  1. 33. Registration
    6/21/13, 8:30 AM
  2. 0. Goals of Meeting
    Prof. Masato SHIOZAWA (The University of Tokyo, Institute for Cosmic Ray Research, ICRR)
    6/21/13, 9:00 AM
    I will briefly explain discussion items of the meeting.
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  3. 2. HK Internal/Domestic situation (HKWG steering group report)
    Prof. Tsuyoshi NAKAYA (Kyoto)
    6/21/13, 9:25 AM
    HKWG steering group report
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  4. 42. J-PARC neutrino beam
    Sho Tada (KEK)
    6/21/13, 9:40 AM
    The future of J-PARC neutrino beam toward 750 kW and beyond will be reported.
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  5. 29. Introduction to physics session
    Masashi Yokoyama (University of Tokyo)
    6/21/13, 10:30 AM
  6. 5. HK sensitivity with T2K systematic treatment
    Dr Motoyasu Ikeda (Kyoto University)
    6/21/13, 10:40 AM
    The sensitivity of CP measurement using J-PARC beam shown in Hyper-K LOI is calculated with fixed theta_23 and delta m^2_32, and the treatment of systematic uncertainty is very simple. To validate the LOI sensitivity, I will show the sensitivity obtained by fitting 4 oscillation parameters (delta_CP, theta_13, theta_23, and delta m^2_32) with more realistic treatment of the systematic...
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  7. 7. Systematic uncertainties in long-baseline neutrino oscillation experiments
    Dr Szymon Manecki (VirginiaTech)
    6/21/13, 11:00 AM
    The CP violating effect in the $\nu_\mu\rightarrow \nu_e$ oscillation probability is suppressed with respect to the CP-conserving contribution. Therefore, systematic uncertainties affecting the signal at long baseline oscillation experiments are extremely relevant for the CP violation searches. We will present a phenomenological analysis showing the possible impact that systematic errors may...
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  8. 26. Near Detector Considerations
    Prof. Francesca Di Lodovico (Queen Mary, University of London)
    6/21/13, 11:20 AM
    Some considerations regarding the near detectors are presented. With a focus on the physics needs for the Hyper-Kamiokande-based long baseline experiment, the expected future performance, aging and needed refurbishment for the current T2K ND280 detector and possible future ideal near detector setups.
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  9. 3. A New Proposal for a Tokai to Hyper-K Near Detector
    Dr Michael Wilking (TRIUMF)
    6/21/13, 1:20 PM
    In order to maximize the physics potential of a projected 10 year beam running period, systematic uncertainties at the 2% level are required, and the largest source of systematic uncertainty is projected to be from uncertainties on neutrino interaction cross sections. This new near detector proposal aims to significantly reduce the dependence of T2HK measurements on a priori knowledge of...
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  10. 21. An application of the neutrino oscillation to geophysics : Study of the Earth's core composition using atmospheric neutrino
    Dr Akimichi Taketa (Earthquake Research Institute)
    6/21/13, 1:40 PM
    Neutrino oscillations inside matter are sensitive to the electron density. On the other hand, neutrino absorption is sensitive to the mass density. The mass density distribution of the Earth's core is also inferred from seismic tomography. Therefore, neutrino oscillation can be used for a probe to determine the average atomic mass ratio A/Z of the Earth's core by comparing with the mass...
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  11. 23. Spallation background
    Dr Itaru Shimizu (Tohoku University)
    6/21/13, 2:00 PM
    A MC based estimation of spallation background in Hyper-K will be reported.
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  12. 20. SRN search with HK
    Dr Takatomi Yano (Okayama Univ.)
    6/21/13, 2:25 PM
    The sensitivity of SRN in HK is reported for several cosmic ray intensity case.
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  13. 41. Search for the spin-independently coupling WIMP captured in the Sun/the Earth in Hyper-Kamiokande
    Ms koun choi (nagoya university)
    6/21/13, 2:50 PM
    WIMP searches using the captured WIMP by terrestrial bodies are characterized by whether the scattering is spin-independent (in which case the WIMP couples to the mass in the nucleus) or spin-dependent (in which case the WIMP couples to the spin of the nucleus). For spin-dependent coupling case, Hyper-K solar analysis is expected to have strongest sensitivity among currently proposed detectors...
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  14. 6. Hyper-K site and cavern
    Prof. Masato SHIOZAWA (The University of Tokyo, Institute for Cosmic Ray Research, ICRR)
    6/21/13, 3:35 PM
    I will summarize the cavern design studies and plan of geological survey at Mozumi site. Document plan will be also explained.
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  15. 11. Hyper-K tank and photo-sensor support structure
    Dr Hide-Kazu TANAKA (ICRR, University of Tokyo)
    6/21/13, 3:55 PM
    I will discuss the current status and updates on Hyper-K tank design.
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  16. 19. Geomagnetic compensation coils
    Dr Shoei Nakayama (Kamioka Observatory, ICRR, University of Tokyo)
    6/21/13, 4:10 PM
    I will show some update of the compensation coil study.
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  17. 25. Status of HK water system and HK water quality
    Dr Hiroyuki Sekiya (ICRR/IPMU)
    6/21/13, 4:20 PM
    I will talk about water.
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  18. 36. Status of Gd in 200 tons, 32 ktons, and 560 ktons
    Prof. Mark Vagins (IPMU)
    6/21/13, 4:45 PM
    Progress and status of water-related issues concerning gadolinium loading in EGADS (200 tons) will be presented, leading into a discussion on how what is being learned could be applied to Super-K's inner volume (32 ktons) and to Hyper-K (560 ktons) as well.
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  19. 34. Parallel-1 (Near Detector discussion)
    6/21/13, 5:30 PM
  20. 37. Parallel-2 (?)
    6/21/13, 5:30 PM
  21. 40. Parallel-3 (?)
    6/21/13, 5:30 PM
  22. 4. Overview of the photodetector development
    Dr Shoei Nakayama (Kamioka Observatory, ICRR, The University of Tokyo)
    6/22/13, 9:00 AM
    I will present a brief introduction of current activities in the photodetector sub-WG and the plan for the photodetector development.
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  23. 27. Status and plan for photodetector tests in a 200-ton tank
    Dr Yasuhiro NISHIMURA (ICRR, University of Tokyo)
    6/22/13, 9:10 AM
    A proof test of 8-inch HPDs and 20-inch high-QE PMTs using a 200-ton tank starts from this summer at Kamioka mine. These preparation status and a recent R&D of photosensors will be presented.
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  24. 24. Performance evaluation and pre-installation calibrations of prototype photodetectors
    Seiko Hirota (Kyoto Univ.)
    6/22/13, 9:30 AM
    We prepared ten 8-inch HPDs and eight high-QE 20-inch PMTs and a part of them will be installed in a 200-ton tank for a proof-test from this summer. For the installation, a gain adjustment finished and these performance was evaluated to select the photodetectors into the tank.
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  25. 31. Enhanced light collection with a wavelength shifter trap
    Dr Fabrice Retiere (TRIUMF)
    6/22/13, 9:45 AM
    The baseline Hyper-K concept relies on 99,000 20” photomultiplier tubes (PMTs) to provide 20% photo-coverage. We are investigating solutions that would enhance the photo-coverage without compromising either contrast or timing resolution. Contrast roughly quantifies the fraction of photons detected that retain the Cerenkov light directional information over the total number of photons detected...
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  26. 22. R&D of light collection system using acrylic lens
    Dr Motoyasu Ikeda (Kyoto University)
    6/22/13, 10:05 AM
    In the current beseline design, the photo-coverage of the HK inner tank is 20%. For the low energy neutrino measurement (for example, a precise measurement of the solar neutrino spectrum or a measurement of the day-night asymmetry of the solar neutrino flux), higher photo-coverage is desirable. This R&D is to enlarge the effective photo-coverage using light collection system. I will show the...
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  27. 8. Using Fast Photosensors in the Next Generation Water Cherenkov Neutrino Detectors
    Prof. Mayly SANCHEZ (Iowa State University)
    6/22/13, 10:45 AM
    The next generation of neutrino experiments will require massive and high resolution detectors to reach the sensitivity needed to measure CP violation in the lepton sector and the neutrino mass hierarchy. New photodetectors based on micro-channel plates are being developed by the Large-Area Picosecond Photo Detector (LAPPD) Collaboration. These photosensors have shown potential for excellent...
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  28. 38. R&D items of the DAQ system in HK
    Dr Yoshinari Hayato (Kamioka obs., ICRR, Univ. of Tokyo)
    6/22/13, 11:05 AM
    Show the necessary R&D items and status of the discussions ( could be short )
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  29. 28. theta_23 and delta can be measured accurately at the same time
    Prof. Hisakazu Minakata
    6/22/13, 11:25 AM
  30. 13. Overview and WCsim with the real HK geometry
    Prof. Chris Walter (Duke University)
    6/22/13, 1:25 PM
    The current activities of the software group will be reviewd as amn introduction of the software session. WCsim is a water cherenkov detector simulater which can generate cylindrical detector configuration, on the other hand, HyperK has "egg shape" cross section. We tried to include this complicated geometry into WCsim and some vlidation work will be presented.
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  31. 15. Development of WCsim and optimization detecor parameters
    Mr Yuji Okajima (Tokyo Institute of Technology)
    6/22/13, 1:45 PM
    Recent developing works about WCsim will be presented. We generated simulations with several detector length to optimize the detector performance.
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  32. 16. fiTQun and interface for WCsim
    Patrick DE PERIO (University of Toronto)
    6/22/13, 2:05 PM
    Recent progress about fiTQun will be reported. The fiTQun was originally developed for Super-K analysis and some interface is needed to run for WCsim output. The interface between fiTQun and WCsim will be discussed.
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  33. 18. Prospects and plans for software
    Dr Makoto Miura (Kamioka Observatory, ICRR, University of Tokyo)
    6/22/13, 2:25 PM
    The optimization of detector parameters are important to decide the detector design. Some ideas for optimization and plan will be discussed.
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  34. 10. Overview and plan for Hyper-K calibration
    Dr Hide-Kazu TANAKA (ICRR, University of Tokyo)
    6/22/13, 3:00 PM
    I will discuss overview of current status and prototyping / R&D plans for Hyper-K calibration.
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  35. 30. OD calibration
    Dr Shigenobu Matsuno (University of Hawaii)
    6/22/13, 3:15 PM
    The outer detector of the Hyper-Kamikande detector needs some way to calibrate their sensor response against known light source. The detail of Super-Kamiokande OD calibration system is presented as an example of such a system. A smilar system for the HK detector will be descussed along with a rough estimation of its cost.
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  36. 1. Facility to measure PMT properties
    Mr Hirohisa A. Tanaka (University of British Columbia/Institute of Particle Physics)
    6/22/13, 3:30 PM
    A facility to measure the response and reflective properties of PMTs (and other materials) in water is under construction at TRIUMF. Through two manipulator arms, collimated and polarize laser light at various wavelengths can be directed at the PMT (or other sample) from a large range of position and angles, with reflected light detected by a photosensor on the other arm. The facility includes...
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  37. 12. Calibration-source positioning system
    Dr Szymon Manecki (VirginiaTech)
    6/22/13, 3:45 PM
    This will be a review of the calibration (insertion) system for the Hyper-K detector. The talk will cover current status and design concept of the hardware as well as details regarding the CCD-source-positioning system incorporated from the Borexino design.
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  38. 9. new calibration source R&D
    Dr Yusuke Koshio (Okayama university)
    6/22/13, 4:00 PM
    The status of the development of new calibration source R&D for Hyper-K.
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  39. 39. Summary of near detector discussion
    Dr Mark Hartz (Kavli IPMU)
    6/22/13, 4:40 PM
    Summary of near detector discussion
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  40. 35. Discussions
    6/22/13, 5:00 PM
  41. 43. Meeting photo
    6/22/13, 5:50 PM
  42. 44. NNN13
    6/22/13, 5:55 PM