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3rd Open Meeting for the Hyper-Kamiokande Project
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Asia/Tokyo
Description
Overview
The Hyper-Kamiokande project is being designed to be the next decade's flagship experiment for the study of neutrino oscillations, nucleon decays, and astrophysical neutrinos.
Following the successful format of the previous meetings, we will hold the 3rd International Open Working Group Meeting for Hyper-Kamiokande. The meeting will be open to all interested scientists and community members.
The slides for the first and second open meetings can be found here;
Following the successful format of the previous meetings, we will hold the 3rd International Open Working Group Meeting for Hyper-Kamiokande. The meeting will be open to all interested scientists and community members.
The slides for the first and second open meetings can be found here;
(1st) http://indico.ipmu.jp/conferenceTimeTable.py?confId=7#all.detailed
(2nd) http://indico.ipmu.jp/conferenceTimeTable.py?confId=10#all.detailed
The goal of this meeting is to further discuss the physics potentials of Hyper-K, the design of the detector, and necessary R&D items including:
(2nd) http://indico.ipmu.jp/conferenceTimeTable.py?confId=10#all.detailed
The goal of this meeting is to further discuss the physics potentials of Hyper-K, the design of the detector, and necessary R&D items including:
- cavern excavation,
- tank liner material and its design,
- photo-sensors and their support structure,
- DAQ electronics and computers,
- calibration systems,
- water purification systems,
- software development,
- neutrino beam-line,
- near detector,
- physics potentials of Hyper-K, and so on.
Participants are encouraged to submit abstracts for talks in which to present their individual interests in topics specifically related to Hyper-K, as well as discuss possible future contributions to the project.
If you would like to contact the relevant people in our group in advance to discuss the Hyper-K project and its development work, please click the contact information menu on the right side of this page to send an email to us.
We expect that those who are interested in joining the project will come to this meeting. However, the meeting will require prior registration to participate. Due to capacity constraints at the meeting site we urge all interested parties to register at their earliest possible convenience.
We are looking forward to seeing you in Kashiwa,
Organizing Committee Members:
Yoshinari HAYATO (ICRR), Yusuke KOSHIO (Okayama), Neil MCCAULEY (Liverpool), Akihiro MINAMINO (Kyoto), Shun-ichi MINE (UCI), Makoto MIURA (ICRR), Tsuyoshi NAKAYA (Kyoto), Shoei NAKAYAMA (ICRR), Yasuhiro NISHIMURA (ICRR), Kimihiro OKUMURA (ICRR), Hiroyuki SEKIYA (ICRR), Masato SHIOZAWA (ICRR, chair), Yasuo TAKEUCHI (Kobe), Hidekazu TANAKA (ICRR), Hirohisa TANAKA (UBC), Mark VAGINS (Kavli IPMU), Roger Wendell (ICRR), Masashi YOKOYAMA (Tokyo)
hk201306@km.icrr.u-tokyo.ac.jp
Participants
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Registration
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1
Registration
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1
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Opening Session
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- 3
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10:05
Break
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Physics Potential
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6
HK sensitivity with T2K systematic treatmentThe 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 uncertainty based on the actual estimation for T2K. In addition, the effect of the constrained on theta_13 from reactor experiments will be shown.Speaker: Dr Motoyasu Ikeda (Kyoto University)
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7
Systematic uncertainties in long-baseline neutrino oscillation experimentsThe 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 have on long baseline experiments such as T2HK, and comment on which of these uncertainties are expected to have the greatest effect.Speaker: Dr Szymon Manecki (VirginiaTech)
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8
Near Detector ConsiderationsSome 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.Speaker: Prof. Francesca Di Lodovico (Queen Mary, University of London)
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11:40
Lunch / Institute representative meeting
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Physics Potential
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9
A New Proposal for a Tokai to Hyper-K Near DetectorIn 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 neutrino cross sections by utilizing a variety of off-axis angles to empirically determine the relationship between neutrino energy and lepton kinematics.Speaker: Dr Michael Wilking (TRIUMF)
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10
An application of the neutrino oscillation to geophysics : Study of the Earth's core composition using atmospheric neutrinoNeutrino 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 density. The outer core composition is believed to consist of 90% iron and 10% light material, but it has not been measured yet. With the advent of the new-generation neutrino detector like Hyper-K, neutrino oscillation spectrometry will allow us to constrain directly the composition of the Earth’s outer core.Speaker: Dr Akimichi Taketa (Earthquake Research Institute)
- 11
- 12
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13
Search for the spin-independently coupling WIMP captured in the Sun/the Earth in Hyper-KamiokandeWIMP 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 for search for the WIMP with mass below few tens of GeV(C.Rott's talk in 1st open meeting). In 3rd open meeting, I'd like to also present the view of spin-independent coupling case for the Sun and the Earth captured WIMP, where the sensitivity can be compared with claimed signals from several direct detectors and prospects of future detectors.Speaker: Ms koun choi (nagoya university)
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9
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15:10
Break
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Cavities and Tanks
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- 15
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Water System
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18
Status of Gd in 200 tons, 32 ktons, and 560 ktonsProgress 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.Speaker: Prof. Mark Vagins (IPMU)
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17:05
Break
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Parallel Sessions
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19
Parallel-1 (Near Detector discussion)
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20
Parallel-2 (?)
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21
Parallel-3 (?)
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19
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Photo-detectors
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23
Status and plan for photodetector tests in a 200-ton tankA 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.Speaker: Dr Yasuhiro NISHIMURA (ICRR, University of Tokyo)
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24
Performance evaluation and pre-installation calibrations of prototype photodetectorsWe 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.Speaker: Seiko Hirota (Kyoto Univ.)
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25
Enhanced light collection with a wavelength shifter trapThe 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 including photons having scattered, been reflected or reemitted. We are proposing to enclose each PMT within a box allowing direct detection of some of the UV and blue Cerenkov light, while recovering a fraction of the light missing the PMT using a combination of wavelength shifter and dichroic. Simulations shows a factor of 2 to 3 enhancement in photon collection compared to the baseline design. We will show detailed optimization results and the first steps towards building a full scale prototype.Speaker: Dr Fabrice Retiere (TRIUMF)
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26
R&D of light collection system using acrylic lensIn 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 current status of test measurements for a commercially available 30cm*30cm acrylic Fresnel lens.Speaker: Dr Motoyasu Ikeda (Kyoto University)
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10:20
Break
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Photo-detectors
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27
Using Fast Photosensors in the Next Generation Water Cherenkov Neutrino DetectorsThe 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 spatial and timing resolution. The application of these developments in photodetector technology to large water Cherenkov detectors could enhance background rejection and vertex resolution by using the gains in spatial and timing information. We describe briefly the status of the LAPPD development and show preliminary results on the reconstruction capabilities for single particles in a 200-kton size water Cherenkov detector.Speaker: Prof. Mayly SANCHEZ (Iowa State University)
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27
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11:45
Lunch
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Softwares
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30
Overview and WCsim with the real HK geometryThe 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.Speaker: Prof. Chris Walter (Duke University)
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32
fiTQun and interface for WCsimRecent 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.Speaker: Patrick DE PERIO (University of Toronto)
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30
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14:35
Break
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Detector Calibrations
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35
OD calibrationThe 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.Speaker: Dr Shigenobu Matsuno (University of Hawaii)
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36
Facility to measure PMT propertiesA 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 Helmholtz compensation coils and shielding to reduce ambient magnetic fields and a vessel to allow measurements in water.Speaker: Mr Hirohisa A. Tanaka (University of British Columbia/Institute of Particle Physics)
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37
Calibration-source positioning systemThis 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.Speaker: Dr Szymon Manecki (VirginiaTech)
- 38
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16:15
Break
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