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titleMeeting 25 January 2023
  • Sander is progressing on the safety procedures. He had some technical questions that were answered by the group.
  • Marty has some technical questions regarding the diode. Alex should check the MAPS excel sheet and propose a technical meeting with Marty.
  • Pietro made a first design for the PCB. The group made the following suggestions:
    • The diode should be off the board, inside the sealed box. We could have a connecter that allows us to easily connect/disconnect the diode

    • We should foresee a power pulsing scheme with a MHz range. More precisely: the load consumes most of the stored power within 1 us, with a 120 Hz repetition frequency. To be foreseen: power storage capacitor, switches controlled at 1MHz, and deal with the case where the average input power is not equal to the average consumed power.

    • Provide probing pins for easy monitoring on oscilloscope

    • Think about the case where the diode would operate on a floating ground for TPC operation (not necessarily implemented in this iteration)

    • Provide key, interlock, light diode (green/red) for the sealed box

  • We need to design the 80/20 box (James would sketch one?)

  • Alex showed the initial Smartsheet planning, which was modified according to the group's suggestions. Objective: Have a first laser by April 1st, with Safety Ok, and PCB ready. For a more detailed planning please visit the Smartsheet page:

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titleLaser Safety Meeting 7 December 2023

Meeting Minutes: 

 We had our first laser safety meeting with Mike Woods and these slides were presented: 231130 first laser safety meeting.pptx

    • We should look at commercial products to see how they are doing interlocks
    • Important things that our system should have:
      • Key
      • Emission Indicator (red/green)
      • interlocking
      • (optional) Emergency OFF button
    • The box should have 2 redundant interlocks in series
    • If the box is made up to specs we will not need a separate laser area and will not need eye protection to operate
    • Box material can be 80/20 Aluminum
    • For the feedthrough we should think of having an elbow to avoid direct line of sight
    • We have to take into account the fiber bend radius
    • SOP is not enough, we will need a separate approval to operate
    • People working on the assembly of this will need:
      • 253
      • 131
      • T53
    • People only operating will need only a simpler laser safety basic course
      • ???
    • Mike gave us permission to buy the laser

Next Steps: 

    • Mike Woods asked for a component list
    • Norman Picker asked us to start a Hazard list with Mitigation (All the risks will be Extremely low)

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