Meeting on the Next Generation <sup>76</sup>Ge Experiment

Europe/Berlin
Description

The search for neutrinoless double beta decay has the potential to discover lepton number violation and to determine the nature of neutrinos. Correspondingly, large, ton-scale next-generation experiments have been identified as a high priority by the nuclear and particle physics communities. The isotope 76Ge has historically been an important isotope in terms of excellent sensitivity, resolution, and background. The ongoing 76Ge-based experiments GERDA Phase II and the MAJORANA DEMONSTRATOR aim to achieve the lowest background to date of experiments currently operating or under construction.

Members of MAJORANA and GERDA would like to move forward with planning for a new, next-generation double-beta decay experiment based on 76Ge-enriched high purity germanium detectors. We intend to combine the best technologies from our two efforts along with additional R&D studies to optimize the design. The purpose of this meeting is to discuss this future new project.

The meeting will be held in Munich, Germany. At IBZ (close to Odeons Platz):

http://www.ibz-muenchen.de/index.php/en/

Below is a list with links of hotels which are well connected to the venue. People should book directly. We have not blocked rooms.

A modest registration fee will be collected to cover coffee breaks, etc., and will be collected in cash at the start of the meeting. There will also be a meeting dinner on Tuesday evening for attendees and their guests.

Participants
    • 08:30 12:00
      Organizers Pre-meeting
      • 08:30
        Organizers premeeting 1h 30m
      • 10:00
        Coffee Break 30m
      • 10:30
        Organizers premeeting 1h 30m
    • 12:00 13:00
      Lunch 1h
    • 13:00 18:30
      General Considerations
      • 13:00
        Welcome/GERDA-MJD history and this meeting 15m
        Speaker: Stefan Schoenert
        Slides
      • 13:15
        BB and nuclear theory 30m
        Speaker: Achim Schwenk
        Slides
      • 13:45
        BB and particle theory 30m
        Speaker: Martin Hirsch
        Slides
      • 14:15
        Neutrinos in cosmology 30m
        Speaker: Alejandro Ibarra
        Slides
      • 14:45
        Non-Ge experimental programs 30m
        Speaker: Laura Baudis
        Slides
      • 15:15
        Coffee break 30m
      • 15:45
        GERDA concept, design, status 45m
        Speaker: Konstantin Gusev
        Slides
      • 16:30
        MJD concept, design, status 45m
        Speaker: Vince Guiseppe
        Slides
      • 17:15
        Bringing the theory to Ge76, strengths and weaknesses of Ge, how large does an experiment need to be. Contrast with other isotopes and experimental techniques 30m
        Speaker: Jason Detwiler (CENPA)
        Slides
      • 17:45
        Adjourn 45m
    • 08:30 11:50
      Community Guidance
      • 08:30
        Advantages of Ge detectors for bb and future improvements 30m
        Speaker: David Radford
        Slides
      • 09:00
        CDEX overview 30m
        Speaker: Qian Yue
        Slides
      • 09:30
        NSAC Report and CD process in US 20m
        Speaker: John Wilkerson
        Slides
      • 09:50
        European Context (something similar to NSAC report, ApPEC maybe) 20m
        Speaker: Thomas Berghoefer
        Slides
      • 10:10
        Coffee Break 30m
      • 10:40
        Other physics with Ge detectors 20m
        Speaker: Matthew Green
        Slides
      • 11:00
        Sino-German Cooperation 20m
        Speaker: Iris Abt
        Slides
      • 11:20
        Status of UG labs 30m
        Speaker: Stefano Ragazzi
        Slides
    • 11:50 13:20
      Lunch 1h 30m
    • 13:20 14:50
      Enrichement, purification & crystal growth
      • 13:20
        Indroduction 15m
        Speaker: Allan Caldwell
        Slides
      • 13:35
        Status of Ge-76 production and purification in Russia 20m
        Speaker: V. Kornoukhov
        Slides
      • 13:55
        Purification and Crystal growth at IKZ 15m
        Speaker: W. Miller
        Slides
      • 14:10
        Ge crystal pulling, Ge processing and recycling of enriched material in the US 20m
        Speaker: Cabot-Ann Christofferson
        Slides
      • 14:30
        Enrichment, crystal growth and detector fabrication in China 20m
        Speaker: Y. Li
        Slides
    • 14:50 18:30
      Possible Configurations
      • 14:50
        Futre LAr light detectioon 20m
        Speaker: Jozsef Janicsko
        Slides
      • 15:10
        Future developments in cabling 20m
        Speaker: Stefan Schoenert
        Slides
      • 15:30
        Depth requirement and shield design 20m
        Speaker: Ralph Massarczyk
        Slides
      • 15:50
        Coffee Break 30m
      • 16:20
        Future developments in electronics 20m
        Speaker: Alan Poon
        Slides
      • 16:40
        200 kg concepts 30m
        Speaker: Bernhard Schwingenheuer
        Slides
      • 17:10
        Tonne scale concepts 30m
        Speaker: Prof. John Wilkerson (UNC)
        Slides
      • 17:40
        High-level WBS indicating key R&D itmes and next steps 40m
        Speaker: Bela Majorovits
        Slides
      • 18:20
        Adjourn 10m
    • 08:30 12:00
      Group Résumés

      Each attending group will be invited to give a 15-20 minute talk on their people, history and activities.

      • 08:30
        Available facilities, an overview of screening facilities (Ge, ICPMS, NAA, Rn emanation…) 30m
        Speaker: Matthias Laubenstein
        Slides
      • 09:00
        Individual group presentations on their capabilities. ~3 min each 1h
        Slides
      • 10:00
        Coffee Break 30m
      • 10:30
        Individual group presentations on their capabilities. ~3 min each 1h 30m
        Slides
    • 12:00 13:30
      Lunch 1h 30m
    • 13:30 16:00
      Résumés and Future Planning
      • 13:30
        Individual group presentations on their capabilities. ~3 min each 1h
      • 14:30
        Coffee Break 30m
      • 15:00
        Next steps, collaboration formation, discuss process toward a first WBS and responsibility assignment, governance issues. 1h
        Speakers: Bernhard Schwingenheuer, Dr Steve Elliott (Los Alamos)
        Slides