Seismic Data from the Black Forest Underground Station and - - PowerPoint PPT Presentation

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seismic data from the black forest underground station
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Seismic Data from the Black Forest Underground Station and - - PowerPoint PPT Presentation

Sep 09, 2023 308 likes •519 views

Seismic Data from the Black Forest Underground Station and Experience from Kamioka Hartmut Grote Hartmut Grote AEI Hannover AEI Hannover ET-WP1 meeting, Gran Sasso, 8.Feb 2009 Berger (et al.) Low Noise Model 2004 Berger et al. (2004),

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Seismic Data from the Black Forest Underground Station and Experience from Kamioka

Hartmut Grote Hartmut Grote AEI Hannover AEI Hannover

ET-WP1 meeting, Gran Sasso, 8.Feb 2009

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Berger (et al.) “Low Noise Model“ 2004

Berger et al.(2004), Ambient Earth Noise: A survey of the Global Seismographic Network, JGR 109, B11307

H.Grote, AEI

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Berger (et al.) “Low Noise Model“ 2004

Translated for Interferometry people...

H.Grote, AEI

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SZGRF – Stations (BGR)

BFO: 162m bs, Granite BRG: 36m bs, aban. mine Hornblendeslates GRFO: Borehole, KS36000, 116m bs, Chalk and dolomite BUG: drift of coal mine, Clastic sediments

H.Grote, AEI

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Black Forest Observatory

Geophysical Obsorvatory since 1972, operated by Universities of Karlsruhe and Stuttgart Granite base-rock, covered by sediments

  • Approx. 150m below surface level

H.Grote, AEI

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Anthropogenic Noise at BFO (STS2 vertical)

H.Grote, AEI

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Black Forest Observatory

H.Grote, AEI

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Comparison of 4 sites

  • 162m,

Granite

  • 36m,

Hornblendeslates

  • 116m,

Chalk and Dolomite Clastic Sediments

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...and More sites...

H.Grote, AEI

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Magmatic Rock in Europe

H.Grote, AEI

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Station map of the virtual European Broadband Seismograph Network (VEBSN)

H.Grote, AEI

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Experience from Kamioka I

Humidity ~100% in the mine Mold growth (Hard to see on green painted walls...) Air de-humifiers in place, but too noisy (vibration) For LCGT: Plan to supply dried air from separate chamber Cryo-cooler: Pulse tube refrigerators make ~1Hz vibration + high-frequency sound (need protection) Heat problem of control room: needed ventilation system Dust in (access) tunnels: E.g. laser power quickly degrading, would need separate air lock for main chamber access Horizontal access very convenient, also safety relevant Working time 8am-5pm, just recently later shifts on request

  • Dr. Shinji Miyoki, University of Tokyo
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Experience from Kamioka II

What should be accounted for in general: Clean, dry, and cool air generation far away from the interferometer Air lock room between tunnel and Lab areas Wall between dusty arms and clean Lab area

H.Grote, AEI