1 / 21

Gigaton Volume Detector (GVD) in Lake Baikal: status of the project

This project provides an overview of the Gigaton Volume Detector (GVD) in Lake Baikal, including the current status and future milestones. The GVD aims to detect neutrinos and cosmic rays in Lake Baikal, Russia. The project involves collaboration between multiple institutes and is expected to significantly contribute to neutrino astrophysics research.

katherinesaunders
Download Presentation

Gigaton Volume Detector (GVD) in Lake Baikal: status of the project

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Gigaton Volume Detector (GVD) in Lake Baikal: status of the project g G.V. Domogatsky INR Moscow

  2. Baikal Collaboration ~ 60physicists and engineers • Institute for Nuclear Research, Moscow, Russia. • Joint Institute for Nuclear Research, Dubna, Russia. • Irkutsk State University, Irkutsk, Russia. • Skobeltsyn Institute of Nuclear Physics MSU, Moscow, Russia. • Nizhny Novgorod State Technical University, Russia. • SaintPetersburg State Marine University, Russia. • Institute of Experimental and Applied Physics, Czech Technical University, Prague, Czech Republic. • Comenius University, Bratislava, Slovakia. • EvoLogicsGmbH, Berlin, Germany.

  3. Shore stations Extension Operating

  4. Pioneering detector NT-200: completed 1998 • First neutrino events in a detector installed in a natural medium. • Results with different stages of NT200: • Investigation of atmospheric neutrinos • Search for a diffuse HE-flux of cosmic neutrinos • Search for neutrinos from WIMP annihilation in the Earth • Search for magnetic monopoles НТ-96 Fully reconstructed neutrino event (1996)

  5. NT200+ 2003 - 2005 Extension of NT-200 by 3 distantstrings Goal: higherefficiency forbrightcascades outside thegeometrical volumeof NT200

  6. The GigatonVolume Detector: configuration and site ~ 1 km Phase-1 600 m GVD array Cluster

  7. The hierarchy: from the optical module to a full cluster OM Section String Cluster To shore 12OMs 8 Strings 3 Sections L ~ 600 m for 3 sections (shownrightfor only 2 sections) R = 60 m Section 1 L Section 2 Single cluster R

  8. The Photomultiplier R 7081-100 from Hamamatsu =10 inch SBA photocathode,QE ≈ 35% @ 400nm Gain ~107, dark current ~8 kHz

  9. The Optical Module OM electronics Mu-metal cage PMT Optical gel Pressure-resistant glass sphere VITROVEX (17”)

  10. Calibration light source LED beacon: 6 blue LEDs pointing upward plus 6 blue LEDS pointing horizontally Purpose: time calibration within a cluster Acoustic positioning system provides string coordinates. Emulation of a~ 1 TeV shower LED beacon 3 4 2 8 Charge 5 1 Time 3 4 2 8 5 1 7 6

  11. Deep-waterpulsedlaser Purposes: - inter-cluster calibration - emulate high-energycascades Correspondsto 104PeVcascade laser

  12. April 2016 Taking data Milestones and future of BAIKAL-GVD-1 March 2017 under construction 300 m ~600 m “Dubna” Demonstration Cluster (2015) ~2300 OM (2020) 8-10 clusters 120 m ~1 km

  13. A muon neutrino candidate (Dubna cluster) Single string. Upward moving  #11469229

  14. Expected number of eventsfor 1 year observation DubnaDemonstrationCluster - 2015 - For 1 year observation, 0.4 events with E >100 TeVand Nhit> 20 OMsare expected, assuming the IceCube flux and an E-2.46 spectrum Nhit> 20 OM Total number of events = 437 970 024 Analyzedlife time = 41.6days Multiplicity of hit OMs after all cuts One event with Nhit = 17 OMs and Erec> 100 TeV!

  15. Hit OMs multiplicity after all cuts preliminary E -2.46atm. ne atm. nm atm. n(total, π/K) Probability of Nhit >16 OM: 0.047 0.002 0.0050.007

  16. A “promising” cascade event E = 158 TeV, θ = 59°, ρ = 73 m(radius of Dubna cluster = 40 m)  shower Note: wehavedemonstratedwith a distantlaserthatwecan measurepreciselypositionandintensityof a light source [ (distance) ~ 3m for a laser 100 m away] e584:8566299

  17. A “promising” cascade event E = 158 TeV, θ = 59°, ρ = 73 m(radius of Dubna cluster = 40 m)  shower For a full cluster (r = 60 m instead of 40 m, 3 instead of 2 sections) we expect ~0.6 cosmic neutrino event with E > 100 TeV per year normalized to IceCube result.

  18. MC-generated cascade event in the 2015 “Dubna” cluster E ~ 1.9 PeV  = 116°  = 23 m, z = -85 m

  19. GVD-1timeline 2009-2010: R&D withsingle prototype strings 2011-2014: R&D with prototype clusterof 3 to 5 strings 2015: Dubna Demonstration cluster Cumulativenumberoffullclustersvs. year Effective volume GVD-1 (cascade) ~ 0.4 km3

  20. Thank you for your attention

More Related