Go to the Indico Home Page Oldest event Older event Up to category Newer event Newest event Printable version
  • Compact style
  • Indico style
  • Indico style - inline minutes
  • Indico style - numbered
  • Indico style - numbered + minutes
  • Indico Weeks View
    • Switch to the management area of this event
    Login

    EP-DT Summer Student Presentations 2021 (1)

    → Europe/Zurich
    CERN

    CERN
    Organised by

    Burkhard Schmidt (EP-DT)

      • 11:00 → 11:20
        High precision calibration of 3D Hall probes for magnet field mappings 20m

        The magnetic measurement team within the CERN EP-DT group oversees the mapping of the field of experimental magnets for High- Energy-Physics experiments, both inside and outside CERN. Several measurement gantries are available for Cartesian and cylindrical mapping of different magnet geometries. The gantries implement a custom-built 3D hall probe card. Such cards host three hall probes glued on the three sides of a glass cube in orthogonal configuration. Hall probes have been chosen over other kinds of magnetic probes for their ability to measure the extremely high fields found in HEP experiments, often in the order of several Tesla.
        A precise calibration of the Hall probe system is required to account for several phenomena that can introduce significant measurement errors. These include relative probe misalignment/non-orthogonality, the Hall temperature coefficient, the planar Hall effect and various non-linearities. A solution to this problem is calibrating the 3D system of Hall probes by rotating them in a uniform magnetic field to cover the entire solid angle and then decompose the Hall voltage in solid spherical harmonics.
        The summer student project was focussed on the most critical and practical aspects of the process, with the objective to achieve a measurement precision down to the order of 10e-4 Tesla or better.

        Speakers: Nicola Pacifico (CERN), Pritindra Bhowmick
        Presentation_pritindra_ep_dt_22_9_21.pdf
      • 11:30 → 11:50
        Monitoring and data analysis tools for LHC gas systems and RPC radiation tests at GIF++ 20m

        With climate change being a growing concern, CERN is committed to reduce its direct greenhouse gas (GHG) emissions. In this contest, the CERN EP-DT Gas Team has developed several strategies to reduce GHG emissions for particle detectors. As Resistive Plate Chambers (RPCs) are the main contributors to CERN GHG emissions caused by particle detectors, a lot of effort is being put in place by the RPC community, experiments and CERN to repair leaks, develop a R134a recuperation system and to search for alternative gases.
        In particular, the CERN Gas Team is working on the development of a R134a recuperation system and the search of eco-friendly gases. A set-up has been implemented at GIF++ to study performance of RPCs in the presence of LHC-like background radiation with eco-friendly gas mixture. Being a long term-test, monitoring and data analysis tools are fundamental.
        The summer student project was focused on developing monitoring and data analysis tools for both LHC gas systems and RPC radiation tests at GIF++. For the monitoring tools, web apps were implemented in python with the framework Dash by Plotly, hosted on the CERN OpenShift platform. For the data analysis, to help understanding data from RPC detectors, a web app was designed to analyze, load, visualize and save runs taken from RPCs. Finally, a draft implementation of a job queue on the openshift cluster was designed and tested.

        Speakers: Anisoara-Ionela Plesca, Beatrice Mandelli (CERN), Gianluca Rigoletti (Universite Claude Bernard Lyon I (FR))
        CERN SummStudent prezentation.pdf