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4th 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 4th International Open Working Group Meeting for Hyper-Kamiokande. The meeting will be open to all interested scientists and community members.
The slides for the past open meetings can be found here;
Following the successful format of the previous meetings, we will hold the 4th International Open Working Group Meeting for Hyper-Kamiokande. The meeting will be open to all interested scientists and community members.
The slides for the past 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
(3rd) http://indico.ipmu.jp/conferenceTimeTable.py?confId=23#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
(3rd) http://indico.ipmu.jp/conferenceTimeTable.py?confId=23#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:
Francesca DI LODOVICO (QMUL), Mark HARTZ (Kavli IPMU), 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), Chris WALTER (Duke), Roger WENDELL (ICRR), Masashi YOKOYAMA (Tokyo)
hk201401@km.icrr.u-tokyo.ac.jp
Participants
104
View full list
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08:30
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09:00
Registration
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08:30
Registration 30m
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08:30
- 09:00 → 09:30
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09:30
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10:20
J-PARC and Beamline
- 09:30
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10:00
The ESSnuSB project 20mWe are making a Design Study of a neutrino Super Beam long base line (500 km) experiment ESSnuSB based on the use of the European Spallation Source (ESS) 5 MW, 2 GeV proton linac and a Megaton water Cherenkov detector to discover leptonic CP violation, performing measurements at the second oscillation maximum, where the sensitivity to CP violation is significantly higher than at the first maximum and thereby making the CP angle measurement significantly less sensitive to systematic errors. Operation at the second maximum is made possible by the very high intensity of the ESS proton linac (1.6exp16 protons on target per year). An account is given of how the high intensity neutrino beam is generated using the ESS linac, of the properties of deep mines around 500 km from ESS that are possible sites for the neutrino detector and of the performance of the experiment for leptonic CP violation discovery.Speaker: Prof. Tord Ekelof (Uppsala University)
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10:20
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10:45
Coffee Break 25m
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10:45
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11:45
Physics Potential and Near Detectors
- 10:45
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10:55
Sensitivity studies for Tokai to Hyper Kamiokande 30mWe will describe sensitivity studies done after the Hyper-Kamiokande LOI by adapting the code used for sensitivity studies in T2K, first to reproduce the results of this LOI and later study the effect of using the fiTQun pi-zero rejection cut and including the muon neutrino sample, as well as requirements for the near detectors constraints.Speakers: Dr Christophe Bronner (Kyoto University), Ms Linda Cremonesi (Queen Mary University of London)
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11:25
HyperK sensitivity study using the VALOR T2K joint 3-flavour analysis 20mWill present initial results from a HyperK sensitivity study using the well-established VALOR joint 3-flavour oscillation analysis. This analysis performs simultaneous fits of the HyperK single muon-like ring and single electron-like ring event reconstructed energy distributions in a framework of 3 active neutrino oscillations including matter effects. Near detector constraints from the 2013 T2K analysis are included and ~80 flux, cross-section, final state re-interaction and efficiency systematics are fully taken into account in the fit. The analysis is performed with the current T2K systematics and with HyperK-era error projection scenarios.Speaker: Mr Shah Raj (Oxford University)
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11:45
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13:05
Lunch 1h 20m
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13:05
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14:40
Physics Potential and Near Detectors
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13:05
Flux Extrapolation Uncertainties from Tokai to Hyper-K 20mPreliminary sensitivity studies for a CP violation measurement with a Tokai-to-HyperK neutrino beam suggest that 2% systematic errors are required to remain statistics limited. We investigate the uncertainty on the flux extrapolation from potential near detector sites in Tokai, including the current ND280 site and potential sites out to 2 km from the neutrino beam production point. We evaluate the neutrino flux uncertainties using current uncertainties on hadron production data from NA61/SHINE used by T2K, and using the expected ultimate uncertainties from NA61/SHINE data. We compare the results to the 2% systematic error requirement and consider the suitability of existing or potential near detector sites.Speaker: Prof. Mark Hartz (Kavli IPMU (WPI), University of Tokyo/TRIUMF)
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13:25
A New Near Detector at Intermediate Disastance for Hyper-Kamiokande 20mA description of the studies on a new near detector at intermediate distances (around 2km or so) for Hyper-Kamiokande is presented, along with a description of the possible benefits and design.Speaker: Prof. Francesca Di Lodovico (Queen Mary, University of London)
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13:45
The nuPRISM Near Detector: Constraining Neutrino Energy Using Multiple Off-Axis Angles 20mAt the previous Hyper-K meeting, the idea for a long water Cherenkov detector that spans multiple off-axis angles was presented. Using this configuration, it is possible to constrain the relationship between lepton kinematics and neutrino energy from the neutrino beam information, rather than relying solely on model-dependent neutrino generator extrapolations. Several details of this detector concept will be presented, such as potential near detector sites and event pileup considerations.Speaker: Dr Michael Wilking (TRIUMF)
- 14:05
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14:20
The DAEdALUS at Hyper-K Experiment: Searching for CP Violation 20mDAEdALUS is a phased program leading to a high-sensitivity search for CP violation. The experiment uses a set of high-intensity 800 MeV cyclotrons to produce pion decay-at-rest neutrino sources at several locations (with baselines of 1.5km, 8km, and 20km) going to the Hyper-K ultra-large, underground detector. The Hyper-K detector would be used to isolate and measure a very large sample of inverse-beta-decay events separately from each of the three sources. The DAEdALUS experiment will provide a high-statistics antineutrino data set with no matter effects that can be combined with the Hyper-K long-baseline data to provide greatly enhanced sensitivity for CP violation measurements.Speaker: Prof. Michael Shaevitz (Columbia University)
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13:05
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14:40
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15:05
Coffee Break 25m
- 15:05 → 15:30
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15:30
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16:40
Cavities and Tanks
- 15:30
- 16:00
- 16:30
- 16:40 → 17:40
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17:40
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18:40
Sub-WG Meetings
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17:40
Software Group 1h Room-A
Room-A
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17:40
Sub-WG Meetings 1h
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17:40
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08:30
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09:00
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09:00
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10:15
Photodetectors
- 09:00
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09:10
Measurement of large-aperture photodetectors in a water tank 30mNew large aperture photodetectors for Hyper-Kamiokande are under development and these usability is tested. For the first proof test, high-QE photomultiplier tubes (51 cm Φ) and hybrid photodetectors (20 cm Φ) have been measured in a 200-ton water tank in Kamioka, Japan. These installation, calibration and performance evaluation, and development status of other new photodetectors will be presented.Speaker: Dr Yasuhiro NISHIMURA (ICRR)
- 09:40
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09:55
Enhanced light collection with photon trap 20mWe investigate the performance of photon traps for enhancing the light collection efficiency within the Hyper-Kamokiokande detector. Cerenkov photons enter the trap by going through a dichroic mirror transmitting UV and blue light and reflecting green light. Some Cerenkov photons are detected directly by a PMT while the others are absorbed in a wavelength shifting plate that reemit green photons. Green photons are confined within a box by the dichroic mirror and regular broad band mirrors covering the other walls. A large fraction of the green photons eventually hit the PMT are detected. Our simulations show that the overall detection efficiency of a 1x1m2 trap with a 12" PMT in the center exceeds the detection efficiency of a 20" PMT. However, the timing resolution is very significantly impaired. We will show the performances of the trap and discuss how it could be used in the context of Hyper-Kamiokande.Speaker: Dr Jean-Michel Poutissou (TRIUMF)
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10:15
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10:40
Coffee Break 25m
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10:40
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11:35
DAQ and Electronics System
- 10:40
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10:55
HK FADC Digitization and Communication Work 20mWe report on two separate research projects related to HK electronics. First, we are exploring the idea of using Flash ADCs (FADCs) for digitizing the HK PMT signals (rather than ADC/TDC digitization). We have done simple tests at TRIUMF of the timing resolution achievable with FADCs. We are also thinking about how to quantify the benefits of FADCs. Second, we are investigating a solution for redundant communication between front end boards based on the RapidIO protocol. A prototype system is being developed based on a Altera Cyclone 5 evaluation board by Terasic.Speaker: Dr Thomas Lindner (Triumf)
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11:15
DAQ plans for HK 20mSeveral UK institutions will participate in the development of Data Acquisition Systems (DAQ) for the prototype and full-scale detectors. We present an overview of considerations towards a conceptual design for a DAQ system and UK interests in this area.Speaker: Francesca Di Lodovico (Queen Mary, University of London)
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11:35
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13:00
Lunch 1h 25m
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12:00
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13:00
T2HK discussion (Flux/ND inputs to the J-PARC LOI) Balcony A (the 4th floor)
Balcony A (the 4th floor)
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12:00
T2HK discussion (Flux/ND inputs to the J-PARC LOI) 1h
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12:00
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13:00
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14:30
Softwares
- 13:00
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13:05
Development of WCSim 25mWCSim is a simulator for water cherenkv detectors and we have developed it for Hyper-K detector simulation. We have compared WCSim with skdetsim which is used in Super-K. To determine a detector configuration of Hyper-K, simulations of HPD are going to install on WCSim. Also an event display for WCSim will be discussed here.Speakers: Dr Alex Himmel (Duke University), Mr Yuji Okajima (Tokyo Institute of Technology)
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13:30
Development of event reconstruction software for Hyper-K 30mfiTQun is a event reconstruction software based on maximum likelihood method and it can determine physics variables (vertex, direction, number of rings, momentum, PID) at once. It was originally developed for Super-K analysis and it could be event reconstruction software also for Hyper-K. Here we will report about status of fiTQun for Hyper-K,Speakers: Dr Blair Jamieson (University of Winnipeg), Dr Michael Wilking (TRIUMF)
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14:00
Computing Model for Hyper-Kamiokande 20mA description of the current computing model strategy for Hyper-Kamiokande is provided. The results from the current simulation production are presented and plans for the simulation production for the LoI shown.Speaker: Prof. Francesca Di Lodovico (Queen Mary, University of London)
- 14:20
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14:30
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14:55
Coffee Break 25m
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14:55
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15:20
Water System
- 14:55
- 15:10
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15:20
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16:15
Detector Calibrations
- 15:20
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15:30
New source inserting system for SK as an R&D of HK calibration 15mCurrent SK calibration is done by inserting sevarel calibration sources from the holes at the top of the tank manually in the dark. So we, Kobe group, are planning to set the source inserting system using a winch with a wire eoncoder controlled by PC. This is also the first step of R&D of the HK calibration system. The target position precision of the system is less than 1cm. By using a gate valve, we can change the sources even under the light. The installation and practical use will be done by the end of FY2015. At this stage, we can move the sources only in z (vertical) direction. At the next stage, we are thinking of testing the calibration system which is movable in all (x, y, and z) deirections in the HK prototype.Speaker: Dr Atsumu Suzuki (Kobe University)
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15:45
Pulsed LEDs as a light source for calibration 15mPulsed LEDs provide an alternative light source for calibration and have been used in other experiments. I will present information on previous LED pulers and discuss their potential application for calibration in hyper-kamiokande.Speaker: Dr Neil McCauley (University of Liverpool)
- 16:00
- 16:15 → 16:45
- 16:45 → 17:45
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09:00
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10:15
