• KAGRA
• Subgroups
• DGS
• Meeting
• 20200430
• minute

2020/4/30 10:00~ DGS meeting for paper

• Miyakawa, Yamamoto, Oshino

Target paper

• LIGO-P2000107: Software X
• Computer related
• Physics for timing: CQG?

Contents

• KAGRA(Miyakawa)
• System(Miyakawa)
  • 3km observatory
  • Real time OS
    • IO chassis
    • ADC/DAC
  • RFM, Dolphin
  • EPICS
  • Timing
  • General network
  • Control room (client)
• Sampling(Yamamoto)
  • Rate

  • AA/AI ->

• Control(Oshino)
  • Real time models, connected by RFM and Dolphin
  • Transfer function
• DAQ(Oshino)
  • Historical
  • Data streaming
  • Data amount
    • Transfer speed from each RTPC
• Data monitor system(Oshino)

  • software(dataviewr, DTT, StripTool. ndscope)

  • Response to user request -> client

• Timing(Yamamoto)
  • Difference from GPS time
    • Offset ~200ns
  • Delay from master to slave (~15ns)
  • Delay from timing slave to IOP model (1PPS sampled at 960Hz)
  • Time stamp at data concentrator
• Conclusion(Miyakawa)

  • Master thesis of Kaji

Action items

• 1paper or 2papers? or series?

• Short author? Full author? -> CPC

• Due date: 1month later

• Document sharing system -> Yamamoto asks Shinkai-san for overleaf