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HiRadMat radiation environment !! First Look !!

HiRadMat radiation environment !! First Look !!. N. Charitonidis – I. Efthymiopoulos – C. Theis. A detailed modeling of the geometry. BA7. 2010. 2010. PA7. TCC6. TJ7. TT61. TA7. TNC. 2010. 1975.

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HiRadMat radiation environment !! First Look !!

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  1. HiRadMat radiation environment !! First Look !! N. Charitonidis– I. Efthymiopoulos – C. Theis N.Charitonidis - HRM PT Meeting

  2. A detailed modeling of the geometry BA7 2010 2010 PA7 TCC6 TJ7 TT61 TA7 TNC 2010 1975 Thanks to: A. Pardons, C. Magnier, O. Choisnet, S. Evrard, D. D Paoli for answering my numerous requests for drawings and details! N.Charitonidis - HRM PT Meeting

  3. FLUKA model Ventilation T9 dump (modeled by A. Christov) Stair-case and elevator holes Magnets & beam elements test stand + collimator • The dimensions of the tunnels and the “tunnel findings” are in almost perfect agreement with the drawings • The electromechanical installation going down the PA7 shaft (Cables, etc…) is taken into account, in order to have a more accurate dose estimation at BA7. N.Charitonidis - HRM PT Meeting

  4. Several Scenarios • Prompt studies (A copper target, 1m length, placed at focal point 1 (representing a worst-case scenario) • Activation studies (operational scenario with the table and the collimator) • Background studies (when the activated objects are removed, the remnant dose at the tunnel) N.Charitonidis - HRM PT Meeting

  5. BA7: Prompt Dose • The prompt radiation is important for the characterization of the area (Supervised Radiation Area – Low Occupancy Area) 70-200 μSv/h Dose rate < 15 μSv/h < 1μSv/h out of the internal wall Worst case scenario: protons, over 100 extractions of 20 s each N.Charitonidis - HRM PT Meeting

  6. Activation Studies • The beam hitting 1mm on the collimator carbon jaw (operational scenario) • The activation of the collimator, and the table, and the dump was calculated after seven cooling times • 1 hour, • 12 hours • 1 day, • 2 days, • 1 week, • 1 month, • 2 months N.Charitonidis - HRM PT Meeting

  7. Activation Studies 1 week cooling time TNC 1 hour cooling time TJ7 N.Charitonidis - HRM PT Meeting

  8. Background dose • When the activated object is being removed (after one experiment), what is the remnant dose at the tunnel that the workers of preparation of the next experiment will be subject to ? • Two scenarios of background radiation studies: • A copper target, 15 cm long placed at f.p 3 • The normal stand – collimator system at f.p 3 N.Charitonidis - HRM PT Meeting

  9. After 1 hour, with the table & the collimator removed • Most of the remnant radiation comes from the dump N.Charitonidis - HRM PT Meeting

  10. Cabling studies • Electrical engineers want to choose the type of the cables and optical fibers that they have to install on the tunnels. • Estimation of the dose (Gray) that the cables will be subjected to, for a 10y approximate period ( protons) N.Charitonidis - HRM PT Meeting

  11. Cabling studies 10-100kGy N.Charitonidis - HRM PT Meeting

  12. Much more to come in next P.T meeting ! N.Charitonidis - HRM PT Meeting

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