4th Open Meeting for the Hyper-Kamiokande Project

27 Jan 2014, 08:00 → 28 Jan 2014, 20:00 Asia/Tokyo

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;

(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:

• 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

 

Slides IMG_0226.JPG

Monday 27 January

Registration

1 Registration

Opening Session

2 Opening remark

Opening remark

Speaker: Prof. Masato Shiozawa (Kamioka Observatory, ICRR, The University of Tokyo)

Slides 140127-Shiozawa-Opening.pdf

3 Steering group report

Steering group report

Speaker: Prof. Tsuyoshi Nakaya (Kyoto University)

Slides HKWG-SC20140127.pdf

J-PARC and Beamline

4 Status of the J-PARC accelerators / neutrino facility and their upgrade plans

Status of the J-PARC accelerators / neutrino facility and their upgrade plans

Speaker: Dr Taku Ishida (KEK)

Slides 140127-HyperK-OpenM4-JPARC-Ishida-v2-1.pdf

5 The ESSnuSB project

We 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)

Slides T.Ekelöf_4th_Open_Hyper-K_Meeting_2014-01-27.ppt

10:20 Coffee Break

Physics Potential and Near Detectors

6 Introduction

Introduction to the "Physics Potential and Near Detectors" session

Speaker: Prof. Masashi Yokoyama (University of Tokyo)

Slides phys-intro.pdf

7 Sensitivity studies for Tokai to Hyper Kamiokande

We 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)

Slides LindaSENS_2014Jan27.pdf

8 HyperK sensitivity study using the VALOR T2K joint 3-flavour analysis

Will 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)

Slides Raj.pdf

11:45 Lunch

Physics Potential and Near Detectors

9 Flux Extrapolation Uncertainties from Tokai to Hyper-K

Preliminary 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)

Slides tokai_to_hyperK_flux_uncertainties.pdf

10 A New Near Detector at Intermediate Disastance for Hyper-Kamiokande

A 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)

Slides Hyper-K_4thOpenMeeting_ID.pdf

11 The nuPRISM Near Detector: Constraining Neutrino Energy Using Multiple Off-Axis Angles

At 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)

Slides nuprismhk_upload.pdf

12 LoI to J-PARC PAC

Goals and schedule for the Letter of Intent to be submitted to J-PARC PAC will be discussed.

Speaker: Masashi Yokoyama (University of Tokyo)

Slides J-PARC-LoI.pdf

13 The DAEdALUS at Hyper-K Experiment: Searching for CP Violation

DAEdALUS 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)

Slides Daedalus_at_HyperK_Shaevitz.pdf

14:40 Coffee Break

Physics Potential and Near Detectors

14 Supernova Relic Neutrino search with Hyper-Kamiokande

The sensitivity of SRN in HK is reported for several cosmic ray intensity case. The cosmic muon flux in HK is also reported.

Speaker: Dr Takatomi Yano (Okayama Univ.)

Slides HKCM_tyano_140127_ver2.pdf

Cavities and Tanks

15 Hyper-K site and cavern

This talk will discuss current status and plan of geological survey at Mozumi site, and also cover status of technical design document for HK cavern construction.

Speaker: Dr Hide-Kazu TANAKA (ICRR)

Slides tanaka_20140127_cavern_www.pdf

16 Hyper-K tank

This talk will discuss current status and plan of Hyper-K tank design, and also cover status of technical design document for the tank design.

Speaker: Dr Shoei Nakayama (Kamioka Observatory, ICRR, The University of Tokyo)

Slides 20140127-Nakayama-Tank-upload.pdf

17 Summary

Summary

Speaker: Prof. Masato Shiozawa (Kamioka Observatory, ICRR, The University of Tokyo)

Slides 140127-Shiozawa-Summary.pdf

Institute Representative Meeting

slides IBR.pdf

18 Institute Representative Meeting

Sub-WG Meetings

19 Software Group

20 Sub-WG Meetings

Tuesday 28 January

Photodetectors

21 Overview of the photodetector development

I will present a brief introduction of current activities in the photodetector sub-WG and the plan for the photodetector development.

Speaker: Dr Shoei Nakayama (Kamioka Observatory, ICRR, The University of Tokyo)

Slides 140128-Nakayama-HKPDintro.pdf

22 Measurement of large-aperture photodetectors in a water tank

New 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)

Slides 20140128_HKPDtest_Nishimura.pdf

23 Status of Texas PMTs

Current status of development of 11 inch HQE PMTs from ADIT/ETEL. Schedule for delivery of prototypes and planned testing. Possible use in WATCHMAN.

Speaker: Robert Svoboda (UC Davis)

Slides Svoboda_20140127.pdf

24 Enhanced light collection with photon trap

We 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)

Slides HK_workshop_PMsimulation_JMP_jan2014.pdf

10:15 Coffee Break

DAQ and Electronics System

25 DAQ session ~ Introduction

Conveners' summary

Speaker: Dr Yoshinari Hayato (Kamioka obs., ICRR, Univ. of Tokyo)

Slides HK_DAQSession_Intro.pdf

26 HK FADC Digitization and Communication Work

We 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)

Slides hk_electronics.pdf

27 DAQ plans for HK

Several 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)

Slides HKDAQ_jan2014_final.pdf

11:35 Lunch

T2HK discussion (Flux/ND inputs to the J-PARC LOI)

28 T2HK discussion (Flux/ND inputs to the J-PARC LOI)

Softwares

29 Introduction of Software session

A review of the status of software at the previous meeting and what we will discuss in this session will be presented.

Speaker: Dr Makoto Miura (Kamioka Observatory, ICRR, University of Tokyo)

Slides sw-intro-miuram.pdf

30 Development of WCSim

WCSim 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)

Slides wcsim-alex.pdf wcsim-okajima.pdf

31 Development of event reconstruction software for Hyper-K

fiTQun 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)

Slides fitqun-blair.pdf

32 Computing Model for Hyper-Kamiokande

A 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)

Slides hk-computing.pdf

33 Summary and toward determination of detector configuration

I will summarize the status of software and discuss plan, especially strategy to determine detector configuration of Hyper-K.

Speaker: Dr Makoto Miura (Kamioka Observatory, ICRR, University of Tokyo)

Slides sw-summary-miuram.pdf

14:30 Coffee Break

Water System

34 Water Status

HK water system and tank water flow design updates

Speaker: Dr Hiroyuki Sekiya (ICRR/IPMU)

Slides 4thHK-Water-sekiya.pptx

35 Gd Status

The current status of gadolinium-in-water R&D studies, particularly the ongoing EGADS project, will be discussed.

Speaker: Prof. Mark Vagins (IPMU)

Slides Gad_HK_4th.ppt

Detector Calibrations

36 Overview and plan

This talk will overview HK calibration WG status and plan, and give a brief introduction to HK calibration R&D programs.

Speaker: Dr Hide-Kazu TANAKA (ICRR, University of Tokyo)

Slides tanaka_20140128_calib.pdf

37 New source inserting system for SK as an R&D of HK calibration

Current 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)

Slides 4thhk_meeting_source_deployment.pdf

38 Pulsed LEDs as a light source for calibration

Pulsed 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)

Slides LED_Pulsers_HKOpen4.pdf

39 Neutron Generators for Calibration

This talk will present neutron generators as calibration sources in water Cherenkov detectors. Discussion will include a description of existing sources as well as present ideas for a future compact neutron generator.

Speaker: Roger Wendell (ICRR)

Slides wendell_neutrons_20140128.pdf

Discussion

40 Discussion

Slides 140128-Shiozawa-Discussion.pdf

J-PARC LOI Meeting

41 J-PARC LOI Meeting

Slides LoI-discussion.pdf