Open Meeting for theHyper-Kamiokande Project

Report of Contributions

https://indico.ipmu.jp/e/7

Open Meeting fo … / Report of Contributions

Registration (1)Contribution ID: 0

Type: not specified

Registration (1)September 26, 2024

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Open Meeting fo … / Report of Contributions

Registration (1)Contribution ID: 1

Type: not specified

Registration (1)Tuesday, 21 August 2012 17:00 (2 hours)

Session Classification: Registration

September 26, 2024

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Reception

Contribution ID: 2

Type: not specified

Reception
Tuesday, 21 August 2012 17:00 (3 hours)

Session Classification: Social Event

September 26, 2024

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Registration (2)Contribution ID: 3

Type: not specified

Registration (2)Wednesday, 22 August 2012 08:00 (1 hour)

Session Classification: Registration

September 26, 2024

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Party

Contribution ID: 4

Type: not specified

Party
Wednesday, 22 August 2012 19:10 (2 hours)

Session Classification: Social Event

September 26, 2024

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Automated calibration system for t …

Contribution ID: 6

Type: not specified

Automated calibration system for the Daya Bay
reactor anti-neutrino experimentThursday, 23 August 2012 15:55 (15 minutes)
The Daya Bay reactor anti-neutrino experiment has made the most precise measurement of theneutrino mixing angle θ13 to date, using six identical gadolinium-loaded liquid scintillator detector
modules. A fully automated calibration system was developed to give a comprehensive and robust
calibration of detector response with multiple gamma and neutron sources.
In this talk, I will describe the design, construction, and performance of the calibration system.

Primary author: Prof. LIU, Jianglai (Shanghai Jiao Tong University)
Presenter: Prof. LIU, Jianglai (Shanghai Jiao Tong University)
Session Classification: Calibration System

September 26, 2024

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Mechanical Performance of Large …

Contribution ID: 7

Type: not specified

Mechanical Performance of Large Format
Underwater Photo-multiplierThursday, 23 August 2012 11:10 (15 minutes)
Large, deep, well shielded liquid detectors have become an important technology for the detection of neutrinos over a wide dynamic range of a few MeV to TeV. The critical component of thistechnology is the large format semi-hemispherical photo-multiplier tube with diameters in therange of 25 to 50cm. The survival of an assembled array of these photo-multiplier tubes underhigh hydrostatic pressure is the subject of this study. These are the results from an R&D program
which is intended to understand the PMT performance under hydrostatic pressure and the modesof failure when a photo-multiplier tube implodes under hydrostatic pressure. Our tests include
detailed measurements of the shock wave which results from the implosion of a photo-multipliertube with different installation enclosure configuration. And we also include a comparison of thetest data to modern hydrodynamic simulation codes. Using these results we can extrapolate toother tube geometries and make recommendation on deployment of the photo-multiplier tubes indeep water detectors with a focus on risk mitigation from a tube implosion shock wave causing a
chain reaction loss of multiple tubes.

Primary author: Dr LING, Jiajie (Brookhaven National Laboratory)
Co-authors: SEXTON, Ken (BNL); Dr DIWAN, Milind (BNL); SHARMA, Rahul (BNL)
Presenter: Dr LING, Jiajie (Brookhaven National Laboratory)
Session Classification: Photo-sensor Development

September 26, 2024

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Contribution ID: 8

Considerations for Calibration Sou …
Type: not specified

Considerations for Calibration Source Deployment
in Hyper-Kamiokande
Thursday, 23 August 2012 15:40 (15 minutes)
The in situ deployment of radioactive and light sources is among the most important means ofcalibrating and understanding the response of large water Cherenkov detectors. Such calibration
data are the primary means by which the optical properties of the water and the response of thephotomultipliers are understood. Given that the Hyper-Kamiokande design calls for ten opticallyisolated detector volumes that must be individually calibrated, consideration must be given to automation that may reduce the necessary manpower and deadtime. Inspired by the SNO “Universal
Interface”, we propose an automated deployment system that allows the positioning of a source
along a plane in the detector volume via pulleys and cables, allowing a large range of source
positions to be sampled from a single portal at the top of the detector volume. Control of themanipulator, along with the monitoring of cable tensions, can be automated and computerized toallow remote and automated operation, apart from interchanging sources.

Primary author:

Mr TANAKA, Hirohisa A. (University of British Columbia/Institute of Particle

Physics)

Presenter: Mr TANAKA, Hirohisa A. (University of British Columbia/Institute of Particle Physics)
Session Classification: Calibration System

September 26, 2024

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Goals of the meeting

Contribution ID: 9

Type: not specified

Goals of the meeting
Wednesday, 22 August 2012 11:20 (20 minutes)
In the opening session, I’d like to give a kind of guideline of discussions in the meeting. First goal
is to form active working groups for each development works including physics potential studies.
Proposal for the organization structure and timeline will be given. I’d like to also present future
prospect of the project in terms of forming international collaboration, budget request, etc.

Primary author:

Prof. SHIOZAWA, Masato (The University of Tokyo, Institute for Cosmic Ray

Research, ICRR)

Presenter: Prof. SHIOZAWA, Masato (The University of Tokyo, Institute for Cosmic Ray Research,
ICRR)

Session Classification: Opening Session

September 26, 2024

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Contribution ID: 10

Excavation of the Hyper-K cavern
Type: not specified

Excavation of the Hyper-K cavern
Wednesday, 22 August 2012 17:35 (20 minutes)
The baseline design of the HK cavern and construction schedule, ongoing optimization works,
remaining issues will be explained in this talk.

Primary author:

Prof. SHIOZAWA, Masato (The University of Tokyo, Institute for Cosmic Ray

Research, ICRR)

Presenter: Prof. SHIOZAWA, Masato (The University of Tokyo, Institute for Cosmic Ray Research,
ICRR)

Session Classification: Cavity and Tanks

September 26, 2024

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Contribution ID: 11

Hyper-K liner and PMT support
Type: not specified

Hyper-K liner and PMT support
Wednesday, 22 August 2012 18:10 (20 minutes)
The design of liner and related studies will be presented in the meeting. In the baseline designof the PMT support, SUS support like the Super-K is presented in the Letter of Intent. We areinvestigating a possibility of cost reduction by hanging PMTs by wires.

Primary author:

Prof. SHIOZAWA, Masato (The University of Tokyo, Institute for Cosmic Ray

Research, ICRR)

Presenter: Prof. SHIOZAWA, Masato (The University of Tokyo, Institute for Cosmic Ray Research,
ICRR)

Session Classification: Cavity and Tanks

September 26, 2024

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J-PARC upgrade

Contribution ID: 13

Type: not specified

J-PARC upgrade
Wednesday, 22 August 2012 13:25 (30 minutes)
J-PARC upgrade.

Primary author: Prof. KOSEKI, Tadashi (KEK)
Presenter: Prof. KOSEKI, Tadashi (KEK)
Session Classification: J-PARC Session

September 26, 2024

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J-PARC Status

Contribution ID: 14

Type: not specified

J-PARC Status
Wednesday, 22 August 2012 13:00 (25 minutes)
J-PARC Status

Primary author: Prof. IKEDA, Yujiro (JAEA)
Presenter: Prof. IKEDA, Yujiro (JAEA)
Session Classification: J-PARC Session

September 26, 2024

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Benefits of and progress towards m …

Contribution ID: 15

Type: not specified

Benefits of and progress towards massive
water-based liquid scintillator detectors
Thursday, 23 August 2012 09:45 (20 minutes)
Recent research and development towards Water-based Liquid Scintillator (WbLS) appears to suggest that such materials can be made stable and economical in large quantities. This opens thepossibility to detect low energy particles below the Cherenkov threshold that are inaccessible to awater Cerenkov detector. It also enhances the scientific agenda of future large water Cherenkov
detectors. Preliminary results of WbLS performance will be presented as well as simulation results for a massive detector. Simulation shows that, based on expected WbLS performance, thesensitivity to proton decay to K+,nu would be increased by over a factor of six with respect to awater Cherenkov detector. Use of a smaller WbLS-based detector suitable for a near site will be
discussed. The viability of filtration at different pore sizes will be reported. Feasibility tests for UV
stabilizer, reverse osmosis, and degasifier stages are planned.

Primary author: JAFFE, David (BNL)
Co-authors: DIWAN, Milind (BNL); YEH, Minfang (BNL)
Presenter: JAFFE, David (BNL)
Session Classification: Water System

September 26, 2024

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Photo-detector development for m …

Contribution ID: 16

Type: not specified

Photo-detector development for maximizing theoverall photon detection efficiency
Thursday, 23 August 2012 13:00 (15 minutes)
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 withoutcompromising either contrast or timing resolution. Contrast roughly quantifies the fraction ofphotons detected that retain the Cerenkov light directional information over the total numberof photons detected, including those that have been scattered, reflected or reemitted. Numerous
analyses (e.g. low energy neutrino physics) would benefit from enhanced photo-coverage. A large
fraction of the photons missing the PMTs could be detected by either using wavelength shifters to
guide them towards either the primary PMT or additional PMTs or by using light concentrators tofocus the light towards the primary PMTs. Wavelength shifters will worsen the contrast unless thereemitted light can be prevented from entering the active water volume. Dichroic mirrors may dojust that by allowing the UV and blue light to be absorbed in the wavelength shifting material andthen reflecting the reemitted green light. In general, we are planning to investigate possible applications of interference filters in Hyper-K whether they are used coupled to wavelength shifters,
as broadband mirrors for the light collectors, or as anti-reflective films to maximize contrast. We
will also describe possible solutions based on similar ideas for the primary PMTs.

Primary author: Dr RETIERE, Fabrice (TRIUMF)
Presenter: Dr RETIERE, Fabrice (TRIUMF)
Session Classification: Photo-sensor Development

September 26, 2024

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Contribution ID: 17

Water containment and PMT depl …
Type: not specified

Water containment and PMT deployment designs for
the LBNE water detector
Wednesday, 22 August 2012 18:30 (20 minutes)
The design considerations for the water containment system and the PMT deployment systems
for the LBNE water Cherenkov detector will be presented. Several design alternatives for themembrane liner for the water Cherenkov detector were investigated and a summary of these investigations will be presented. Several alternate designs for the PMT mounting scheme were also
investigated as part of the design process. The final design was based on cable deployment. The
issues related to this will also be presented.

Primary author: STEWART, Jim (BNL)
Presenter: STEWART, Jim (BNL)
Session Classification: Cavity and Tanks

September 26, 2024

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HEP and Neutrino Project status (J …

Contribution ID: 18

Type: not specified

HEP and Neutrino Project status (Japan/Asia)
Wednesday, 22 August 2012 09:00 (25 minutes)
Status of HEP and Neutrino Project in Japan and Asia.
The KEK status is also reported.

Primary author: Prof. OKADA, Yasuhiro (KEK)
Presenter: Prof. OKADA, Yasuhiro (KEK)
Session Classification: Opening Session

September 26, 2024

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Neutrino Project status (USA)Contribution ID: 19

Type: not specified

Neutrino Project status (USA)
Wednesday, 22 August 2012 09:25 (25 minutes)
US neutrino project status

Primary author: SVOBODA, Robert (UC Davis)
Presenter: SVOBODA, Robert (UC Davis)
Session Classification: Opening Session

September 26, 2024

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Neutrino Project Status (Europe)

Contribution ID: 20

Type: not specified

Neutrino Project Status (Europe)
Wednesday, 22 August 2012 09:50 (25 minutes)
European Neutrino project status

Primary author: Prof. RUBBIA, Andre (ETH Zurich)Presenter: Prof. RUBBIA, Andre (ETH Zurich)
Session Classification: Opening Session

September 26, 2024

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Japan HEP future project subcom …

Contribution ID: 21

Type: not specified

Japan HEP future project subcommittee report
Wednesday, 22 August 2012 10:40 (20 minutes)
Japan HEP future project subcommittee report

Primary author: Prof. MORI, Toshinori (ICEPP, Tokyo)
Presenter: Prof. MORI, Toshinori (ICEPP, Tokyo)
Session Classification: Opening Session

September 26, 2024

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Japan CRC future project subcom …

Contribution ID: 22

Type: not specified

Japan CRC future project subcommittee report
Wednesday, 22 August 2012 11:00 (20 minutes)
Japan CRC (Cosmic-Ray-Committee) future project subcommittee report

Primary author: Prof. KANDA, Nobuyuki (Osaka City)
Presenter: Prof. KANDA, Nobuyuki (Osaka City)
Session Classification: Opening Session

September 26, 2024

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Gd Option for Hyper-K

Contribution ID: 23

Type: not specified

Gd Option for Hyper-K
Thursday, 23 August 2012 09:25 (20 minutes)
A water system design which allows the use of dissolved gadolinium sulfate in Hyper-Kamiokande
will be discussed, along with the current status of Super-Kamiokande’s gadolinium R&D project.

Primary author: Prof. VAGINS, Mark (Kavli IPMU)
Presenter: Prof. VAGINS, Mark (Kavli IPMU)
Session Classification: Water System

September 26, 2024

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Contribution ID: 24

Basic water plan for Hyper-K
Type: not specified

Basic water plan for Hyper-K
Thursday, 23 August 2012 09:00 (25 minutes)
The grand design of Hyper-K water and the detail of the pure water system including the flow inthe tank will be presented.

Primary author: Dr SEKIYA, Hiroyuki (ICRR)
Presenter: Dr SEKIYA, Hiroyuki (ICRR)
Session Classification: Water System

September 26, 2024

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Hybrid Photo-Detector study at K …

Contribution ID: 25

Type: not specified

Hybrid Photo-Detector study at Kamioka
Thursday, 23 August 2012 10:05 (25 minutes)
Hybrid Photo-Detector (HPD) with an avalanche diode is one of the photo-sensor candidates forHyper-K. It is considered to have a better performance in lower price than PMT in Super-K. We
started a study of an 8-inch HPD developed by Hamamatsu Photonics and that of a 20-inch diameter will be provided within a few years. In Kamioka mine we have a plan to test the HPD in a
200-ton water Cherenkov detector loaded with Gadolinium. Before the installation into the tank,
we calibrate the 8-inch HPD and measure its performance in this year. The plan and details of the
project, as well as the property of HPD will be presented.

Primary author: Dr NISHIMURA, Yasuhiro (ICRR)
Co-author: Ms HIROTA, Seiko (Kyoto University)
Presenter: Dr NISHIMURA, Yasuhiro (ICRR)
Session Classification: Photo-sensor Development

September 26, 2024

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Contribution ID: 26

SK calibration overview
Type: not specified

SK calibration overview
Thursday, 23 August 2012 15:15 (25 minutes)
Super-Kamiokande (SK) is a 50kton water Cherenkov detector. Since starting the experiment,
many kinds of calibration has been doing. In this presentation, the calibration in SK will be summarized, and discuss about what is a critical point for water Cherenkov detector calibration. Fromthat point of view, a requirement for HK will also be discussed.

Primary author: Dr KOSHIO, Yusuke (Kamioka observatory, ICRR, Univ. of Tokyo)
Presenter: Dr KOSHIO, Yusuke (Kamioka observatory, ICRR, Univ. of Tokyo)
Session Classification: Calibration System

September 26, 2024

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Towards Reduced Neutrino Flux & …

Contribution ID: 27

Type: not specified

Towards Reduced Neutrino Flux & Interaction
Uncertainties for a J-PARC to Hyper-K Experiment
Wednesday, 22 August 2012 14:40 (20 minutes)
The Hyper-K letter of intent discusses the physics potential to measure delta_cp by a J-PARC toHyper-K long baseline experiment assuming systematic errors for the signal and background thatare controlled at the 5% level. Reducing uncertainties in neutrino flux and interaction modelingwill be crucial to achieve 5% uncertainties. The T2K experiment, which uses the J-PARC neutrino
beam, an off-axis near detector at the J-PARC site and the off-axis Super-K water cherenkov far
detector, has achieved neutrino flux and interaction uncertainties that are controlled at the 10-12%
level. In this talk I will present details of the T2K efforts to reduce the uncertainties on the neutrino flux and interaction modeling using hadron production data, neutrino cross section data, andmeasurements from the T2K near detectors. I will also discuss the prospects for further reductionof the uncertainties towards the level necessary for a J-PARC to Hyper-K long baseline experiment.

Primary author: Dr HARTZ, Mark (University of Toronto/York University)
Presenter: Dr HARTZ, Mark (University of Toronto/York University)
Session Classification: Hyper-K Physics Potential

September 26, 2024

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Long baseline experiment and pro …

Contribution ID: 28

Type: not specified

Long baseline experiment and proton decay searchusing Hyper-K
Wednesday, 22 August 2012 13:55 (30 minutes)
I will review the physics potential of a long baseline experiment using J-PARC neutrino beam andHyper-K, and proton decay search in Hyper-K.

Primary author: Prof. YOKOYAMA, Masashi (University of Tokyo)
Presenter: Prof. YOKOYAMA, Masashi (University of Tokyo)
Session Classification: Hyper-K Physics Potential

September 26, 2024

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Supernova neutrino astronomy wi …

Contribution ID: 29

Type: not specified

Supernova neutrino astronomy with
Hyper-Kamiokande
Wednesday, 22 August 2012 16:50 (25 minutes)
The diffuse supernova neutrino background (DSNB) is the faint glow of MeV neutrinos from distantcore-collapse supernovae. It has not been detected yet, but the Super-K upper limit on the flux ofelectron antineutrino is very close to modern predictions. Hyper-K is expected to detect dozens
of DSNB neutrinos yearly. In addition, Hyper-K will open a new window of neutrinos from corecollapses occurring in nearby galaxies. Combined, these provide a tantalizing set of new probes
to study the fate of core collapses, the supernova neutrino emission, and the cosmic core-collapse
rate.

Primary author: Dr HORIUCHI, Shunsaku (CCAPP, Ohio State University)
Presenter: Dr HORIUCHI, Shunsaku (CCAPP, Ohio State University)
Session Classification: Hyper-K Physics Potential

September 26, 2024

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LBNE photosensor R & D includin …

Contribution ID: 30

Type: not specified

LBNE photosensor R & D including light collection
options
Thursday, 23 August 2012 10:55 (15 minutes)
LBNE photosensor R&D including light collection options

Primary author: SVOBODA, Robert (UC Davis)
Presenter: SVOBODA, Robert (UC Davis)
Session Classification: Photo-sensor Development

September 26, 2024

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Contribution ID: 32

Current baseline design of HK DA …
Type: not specified

Current baseline design of HK DAQ system
Thursday, 23 August 2012 13:30 (25 minutes)
Report the current idea of the HK DAQ system

Primary author: Dr HAYATO, Yoshinari (Kamioka obs., ICRR, Univ. of Tokyo)
Presenter: Dr HAYATO, Yoshinari (Kamioka obs., ICRR, Univ. of Tokyo)
Session Classification: DAQ System

September 26, 2024

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Photomultiplier Tube Glass Failure …

Contribution ID: 34

Type: not specified

Photomultiplier Tube Glass Failure in Neutrino
Detection: Challenges and Opportunities
Thursday, 23 August 2012 11:25 (15 minutes)
We have undertaken a detailed investigation of photomultiplier tube (PMT) glass fracture at Alfred
University, in support of Brookhaven National Laboratory’s Long Baseline Neutrino Experiment(LBNE). The strength and lifetime prediction of the PMT glass are crucial to the success of theneutrino detection. Glass fracture is statistical in nature. Glasses are generally under constantstate of stress and are susceptible to subcritical crack growth in the presence of water vapor. The
crack size increases until the stress intensity at the crack tip exceeds the fracture toughness or critical stress intensity factor and failure occurs. Major challenges include lack of fracture mechanics
data on the PMT glasses, predictive model of their failure, and fundamental understanding of theprocesses and mechanisms of their failure under the neutrino detection environments. With systematic static fatigue testing and accelerated testing in the laboratory, a database can be assembled.
Additionally, relationship between glass chemistry and PMT failure can be also developed. With
proof-testing data, we can develop and validate a predictive model. We will present our preliminary crack growth results on PMT glasses from vendors.

Primary author:

Prof. SUNDARAM, S. K. (Kazuo Inamori School of Engineering, Alfred Univer-sity)

Co-author: Prof. DIWAN, Milind (Brookhaven National Laboratory)
Presenter:

Prof. SUNDARAM, S. K. (Kazuo Inamori School of Engineering, Alfred University)

Session Classification: Photo-sensor Development

September 26, 2024

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A New Method for Event Reconstr …

Contribution ID: 35

Type: not specified

A New Method for Event Reconstruction in Large
Water Cherenkov Detectors
Thursday, 23 August 2012 14:05 (20 minutes)
In the Hyper-K detector, all information about a given set of final state particles is encoded in acharge and a time for each photomultiplier tube. This new reconstruction algorithm, based on themethod used by MiniBooNE (NIM A608, 206 (2009)), calculates time and charge probability distribution functions for every tube at each stage of a likelihood fit minimization. The particle lightemission profiles, tank and water properties, and the response of the electronics are all treated separately, which makes it straightforward to incorporate any Cherenkov-emitting particle hypothesis,
extend the algorithm to many different detector geometries, and reconstruct multi-particle final
states within a common likelihood fit framework. A first version of the algorithm has been implemented for the Super-K detector, and preliminary performance comparisons to previously existing
Super-K reconstructions algorithms will be presented. In addition, possible applications to future
CP violation and proton decay measurements at Hyper-K will be discussed.

Primary author: Dr WILKING, Michael (TRIUMF)
Presenter: Dr WILKING, Michael (TRIUMF)
Session Classification: Software Development

September 26, 2024

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Overview of software developmen …

Contribution ID: 39

Type: not specified

Overview of software development towards Hyper-K
Thursday, 23 August 2012 13:55 (10 minutes)
In this talk, a prospect for software development will be discussed.

Primary author: Dr MIURA, Makoto (Kamioka Observatory, ICRR, University of Tokyo)
Presenter: Dr MIURA, Makoto (Kamioka Observatory, ICRR, University of Tokyo)
Session Classification: Software Development

September 26, 2024

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Studies of a ”thin” veto for LBNE

Contribution ID: 41

Type: not specified

Studies of a ”thin” veto for LBNE
Wednesday, 22 August 2012 18:50 (15 minutes)
A prototype veto system was designed and built for LBNE that used a veto system only 85 cm thickwith minimal PMT coverage. The design and efficiency measurements are presented.

Primary author: SVOBODA, Robert (UC Davis)
Presenter: SVOBODA, Robert (UC Davis)
Session Classification: Cavity and Tanks

September 26, 2024

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Solar neutrinos and supernova bur …

Contribution ID: 42

Type: not specified

Solar neutrinos and supernova burst neutrinos at
Hyper-Kamiokande
Wednesday, 22 August 2012 16:25 (25 minutes)
n this presentation, the sensitivity of solar neutrinos is discussed. In the case of shallow place,the most serious background will be spallation products induced from cosmic ray muons. How
much reduce background by improving an analysis method will be estimated. Using this result,
the requirement for the solar neutrino physics, such as the constraint to delta-m-square_21, isdiscussed. The expectation event rate from the SuperNova burst is also discussed.

Primary author: Dr KOSHIO, Yusuke (Kamioka observatory, ICRR, Univ. of Tokyo)
Presenter: Dr KOSHIO, Yusuke (Kamioka observatory, ICRR, Univ. of Tokyo)
Session Classification: Hyper-K Physics Potential

September 26, 2024

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Contribution ID: 43

LBNE WCD calibration system de …
Type: not specified

LBNE WCD calibration system design and energy
calibration requirements for large water Cherenkov
detectors
Thursday, 23 August 2012 16:25 (20 minutes)[SINNIS, Gus (Los Alamos National Laboratory)]
The Long Baseline Neutrino Experiment in the US was developing two far detector concepts inparallel. While a liquid Argon time projection chamber was ultimately selected as the far detector
technology, we have performed a conceptual design of the calibration requirements and systems
needed for a large (200 kTon) water Cherenkov detector. In this talk I will discuss the requirements
and design concepts for the calibration systems of the water Cherenkov detector design for LBNE.
[KUTTER, Thomas (LSU)]
A 200kt water Cherenkov detector was considered for the Long Baseline Neutrino Experiment(LBNE). Calibration requirements were defined based on past experience with water Cherenkov
detectors and dedicated physics sensitivity studies. A calibration strategy and program were developed to characterize relevant properties of the detector. These include the optical calibration of
the detector (water transparency, PMT properties), energy response, particle identification, vertex
and angular resolution and environmental monitoring. The derived oscillation probability depends
directly on the measured energy ofdetected neutrino candidate events. Effects of energy resolution and energy scale and respective
uncertainties on the sensitivity to measure the CP phase delta and the mass hierarchy were studied.
These studies were performed within the GLoBES framework and with an independent analysis
approach. Results of these studies will be presented.

Primary authors:

Dr SINNIS, Gus (Los Alamos National Laboratory); KUTTER, Thomas (LSU)

Co-author: INSLER, Jonathan (LSU)
Presenters: Dr SINNIS, Gus (Los Alamos National Laboratory); KUTTER, Thomas (LSU)
Session Classification: Calibration System

September 26, 2024

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Development of a Large Area Phot …

Contribution ID: 44

Type: not specified

Development of a Large Area Photodetector with a
Fast Phosphor AnodeThursday, 23 August 2012 13:15 (15 minutes)
The next generation neutrino experiments like the Hyper-Kamiokande requires cost-effective ways
to instrument large volumes with O(10^(4−5)) pieces of photodetectors. Such photodetectors are
required to have good effective quantum efficiency, large active area, high gain to allow use of simple and cheap electronics, and good time resolution to reconstruct the wave front of the Cherenkov
cone.
A concept of the hybrid photodetector with luminescent anode has been developed as one of ways
to meet the above goals. The large advantage of the concept is the simplicity in the structure,
where there is no active component, such as dynode complex or photo-diode inside the vacuum,that would lead to significant reduction of cost in the mass production.
We are developing a large area photodetector with a fast phosphor “J9758”, which has a decay time
constant of 500 ps, and the emission peak at around 420nm. In this talk, we will present the resultsof performance tests, using a 8-inch prototype photodetector.

Primary author: Prof. IIJIMA, Toru (Nagoya University)
Presenter: Prof. IIJIMA, Toru (Nagoya University)
Session Classification: Photo-sensor Development

September 26, 2024

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Dark Matter Sensitivity Studies

Contribution ID: 45

Type: not specified

Dark Matter Sensitivity Studies
Wednesday, 22 August 2012 17:15 (20 minutes)
Hyper-Kamiokande will have a tremendous potential for the detection of neutrino signals fromdark matter annihilations. The talk will give an overview of analysis methods and dark matter
detection channels relevant for Hyper-K. The talk will conclude by giving dark matter sensitivities
and by pointing out specific instrumental details that will help to optimize the physics potential
for Hyper-K.

Primary author: Dr ROTT, Carsten (CCAPP / Ohio State University)
Co-authors: Prof. ITOW, Yoshitaka (STEL/KMI Nagoya University); Ms CHOI, koun (nagoya university)

Presenter: Dr ROTT, Carsten (CCAPP / Ohio State University)
Session Classification: Hyper-K Physics Potential

September 26, 2024

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Irreducible Cross-Section Uncertai …

Contribution ID: 46

Type: not specified

Irreducible Cross-Section Uncertainties for Electron
Neutrino Appearance?
Wednesday, 22 August 2012 15:00 (20 minutes)
The usual strategy for controlling systematic uncertainties due to neutrino interactions in oscillation experiments is to use the same beam, or data from other experiments, to constrain those
uncertainties. In this brief discussion, I point out a few limitations in this technique that may
be problematic for oscillation physics in the high precision era, and I will suggest some possible
remedies.

Primary author: MCFARLAND, Kevin (University of Rochester)Presenter: MCFARLAND, Kevin (University of Rochester)Session Classification: Hyper-K Physics Potential

September 26, 2024

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Systematics in CPV measurement

Contribution ID: 48

Type: not specified

Systematics in CPV measurement
Wednesday, 22 August 2012 14:25 (15 minutes)
Discuss about important systematic errors for the CPV measurement

Primary author: Dr NAKAYAMA, Shoei (Kamioka Observatory, ICRR, University of Tokyo)
Presenter: Dr NAKAYAMA, Shoei (Kamioka Observatory, ICRR, University of Tokyo)
Session Classification: Hyper-K Physics Potential

September 26, 2024

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Atmospheric Neutrino Oscillations …

Contribution ID: 49

Type: not specified

Atmospheric Neutrino Oscillations at
Hyper-Kamiokande
Wednesday, 22 August 2012 15:20 (25 minutes)
Recently experimental measurements of reactor, atmospheric, and solar neutrinos have provided
an increasingly clear picture of neutrino oscillations. However, several open issues including thenature of the neutrino mass hierarchy, the octant of θ23 , and whether or not neutrinos are CPviolating, remain. Atmospheric neutrinos are capable of addressing these questions due to thesizeable matter effects they experience as they traverse the Earth. With 25 times the fiducial volumeof the Super-Kamiokande detector, Hyper-Kamiokande will have unprecedented access to theseoscillations. This talk will focus on the sensitivity of atmospheric neutrinos at Hyper-Kamiokande
to open questions in oscillation physics, particularly in the era of large θ13 now favored by reactor
experiments.

Primary author: Dr WENDELL, Roger (ICRR)
Presenter: Dr WENDELL, Roger (ICRR)
Session Classification: Hyper-K Physics Potential

September 26, 2024

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Contribution ID: 50

The LAGUNA Feasibility Study for …
Type: not specified

The LAGUNA Feasibility Study for the LSC to Host a
Next-Generation Mega-ton type Neutrino andNucleon Decay Experiment
Wednesday, 22 August 2012 17:55 (15 minutes)
A very detailed feasibility study for the “Canfranc Underground Laboratory” (LSC) to host a NextGeneration Mega-ton type Neutrino and Nucleon Decay Experiment was carried out within the
EU funded LAGUNA program (E.U. Grant Agreement No. 212343 FP7-INFRA-2007-1). All fundamental aspects were covered: geological, geotechnic, environmental, socio-economical etc. A
pre-design of the the main caverns, auxiliary caverns, access tunnels for the construction and running phases, all type of services, emergency routes end equipment, etc. was made. For each of
the main caverns a rather r:ealistic elasto-plastic model calculation was performed to validate thepre-design of the excavation and reinforcement of the main cavern. Also the full cost was estimated rather accurately. Here we emphasize the geological, geothecnic and pre-design aspects ofthe study that might be of some help in the design of the Hyper-Kamiokande project.

Primary author: Prof. LABARGA, Luis (Departamento de Física Teórica, Universidad Autónoma
de Madrid)

Presenter:

Prof. LABARGA, Luis (Departamento de Física Teórica, Universidad Autónoma de

Madrid)Session Classification: Cavity and Tanks

September 26, 2024

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Development of GEANT4 based w …

Contribution ID: 51

Type: not specified

Development of GEANT4 based water Cherenkov
detector simulation, WCSim
Thursday, 23 August 2012 14:25 (25 minutes)
WCSim is a Geant4 based water Cherenkov detector simulation originally developed to test thephysics potential of a 1 kton water detector located 2 km away from the T2K beam target. Recently,
its code has been updated to accommodate the needs of the LBNE water Cherenkov detector option
by allowing the simulation of large cylindrical tank configurations with an adjustable number of
PMTs. Moreover, the optical properties have been tuned at about the 3% level to the Geant3 based
Super-Kamiokande simulation that is finely tuned to data. I will describe WCSim and its interface
to the Super-K tool suite.

Primary author: Prof. WALTER, Chris (Duke University)
Presenter: Prof. WALTER, Chris (Duke University)
Session Classification: Software Development

September 26, 2024

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Cosmic background study for atm. …

Contribution ID: 52

Type: not specified

Cosmic background study for atm. nu and proton
decay
Wednesday, 22 August 2012 15:45 (15 minutes)
Effect of cosmic background for atm. nu and proton decay will be discussed.

Primary author: Prof. OKUMURA, Kimihiro (ICRR)
Presenter: Prof. OKUMURA, Kimihiro (ICRR)
Session Classification: Hyper-K Physics Potential

September 26, 2024

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Borexino calibration system

Contribution ID: 53

Type: not specified

Borexino calibration system
Thursday, 23 August 2012 16:10 (15 minutes)
The specific egg-shape geometry of Hyper-Kamiokande poses firstly difficulties for the future calibration campaigns performed in the detector. In contrast to Super-K, the vertical walls would
be curved which would limit access to certain regions of the active volume causing unnecessary
reduction in the number of calibration locations. As a result, there is a strong urge to develop new,
3-dimensional tools that would help to improve the performance and the results of the calibrations.
VirginiaTech, with Dr. Camillo Mariani and Szymon Manecki, would like to join efforts in the development and construction of such hardware. VirginiaTech has previously been responsible forthe construction and leadership over a very successful series of calibration campaigns of the Borexino detector. In 4 calibrations, some 295 positions were covered in 35 days of DAQ time. Various
radioactive and laser sources were used, most of which were developed and constructed at VT. Oneof the most effective tools used was the source location system based on 7 consumer-grade digital
cameras that turned out to be precise to within 0.6\,cm throughout the volume of the detector. At
the same time, in its ultra-pure environment, the cleanliness of the system was of major concern.
But also in this case, no long-term contamination has been identified. The team at VirginiaTech
has proven in multiple categories its proficiency and expertise in the field, and would like to now
demonstrate the same level of capability as a Hyper-Kamiokande collaborator.

Primary author: Dr MANECKI, Szymon (VirginiaTech)
Presenter: Dr MANECKI, Szymon (VirginiaTech)
Session Classification: Calibration System

September 26, 2024

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Discussion for Physics Potentials

Contribution ID: 56

Type: not specified

Discussion for Physics Potentials
Thursday, 23 August 2012 17:45 (1 hour)

Session Classification: Discussion for Physics Potentials

September 26, 2024

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Contribution ID: 57

Final Discussion Session
Type: not specified

Final Discussion Session
Thursday, 23 August 2012 18:45 (1 hour)

Session Classification: Final Discussion Session

September 26, 2024

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Cavity and Tanks

Contribution ID: 58

Type: not specified

Cavity and Tanks
Thursday, 23 August 2012 16:45 (1 hour)Presenter: Prof. SHIOZAWA, Masato (The University of Tokyo, Institute for Cosmic Ray Research,
ICRR)

Session Classification: Parallel Discussions

September 26, 2024

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Water System

Contribution ID: 59

Type: not specified

Water System
Thursday, 23 August 2012 16:45 (1 hour)Presenters: Dr SEKIYA, Hiroyuki (ICRR/IPMU); Prof. VAGINS, Mark (IPMU)
Session Classification: Parallel Discussions

September 26, 2024

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Photo-sensor

Contribution ID: 60

Type: not specified

Photo-sensor
Thursday, 23 August 2012 16:45 (1 hour)Presenters: Dr NAKAYAMA, Shoei (Kamioka Observatory, ICRR, University of Tokyo); Dr NISHIMURA,
Yasuhiro (ICRR)
Session Classification: Parallel Discussions

September 26, 2024

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DAQ system

Contribution ID: 61

Type: not specified

DAQ system
Thursday, 23 August 2012 16:45 (1 hour)Presenter: Dr HAYATO, Yoshinari (Kamioka obs., ICRR, Univ. of Tokyo)
Session Classification: Parallel Discussions

September 26, 2024

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SoftwareContribution ID: 62

Type: not specified

SoftwareThursday, 23 August 2012 16:45 (1 hour)Presenter: Dr MIURA, Makoto (Kamioka Observatory, ICRR, University of Tokyo)
Session Classification: Parallel Discussions

September 26, 2024

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Calibration

Contribution ID: 63

Type: not specified

Calibration
Thursday, 23 August 2012 16:45 (1 hour)Presenter: Dr TANAKA, Hide-Kazu (ICRR, University of Tokyo)
Session Classification: Parallel Discussions

September 26, 2024

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