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    H* weekly meeting

    → Europe/Zurich
    H* weekly meeting
    Zoom Meeting ID
    61669489432
    Description
    H* meeting room
    Host
    Chloe Malbrunot
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    • Fredrik verifies the specs according to Chloés mail:
      • the diameter of the sensor
      • frequency of the chopper
      • with and without lock-in amp
      • the range of the calibration
      • flatness of the response in the THz range (efficiency  of the absorber)
    • Igniter for lamp --> wait for Daniel cleaning up the lab for the move and see if he finds it. Decision to be taken early next week.
    • Filters are still on the way from Lille
    • Simulations (Tim will take care of it at some point on a VM)
    • Reach out to Daniel for high-rep rate simulations that we now intend to do at some point ??
    • O-ring --> Fredrik will follow up with Martin/Amit today and give feedback to Maxime. If not available at SMI Maxime follows up on a bricolage solution.
    • Connector has been put in by Maxime --> still some vacuum issues, but about to be solved since he already re-glued the thing and will put again
    • Maxime confirmed that without the self-made feedthrough the pressure is fine (1e-7 range --> that is some outgassing)
    • Gate valve: Fredrik will look into some adapters. The gate valve should go behind the glass tube directly. Maxime will check if there is a spatial issue to put the gate valve in! Rods might be sent as well in the same package as the teflon stuff in case they have at SMI.
    • Periscope outside the laser housing still needs to be implemented to go to correct beamline height with laser (once Helmholtz coils are in)
    • Maxime will put in the new feedthrough for the MCP
    • We could eventually change the TMP in the detection region (check with Martin as well what he ordered and what is sitting on the shelf) --> Chloé is checking if there are still pumps around that Martin ordered. We checked, there should be many pumps around (Fredrik asks Martin)
    • Maxime shows the weird behavior with pumps off and chambers closed --> vacuum getting worse over the weekend (--> weird 20 min oscillation)
    • Maxime also observed that the "bad" pump we currently have stops spinning faster when turned off
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