RP studies for WP2 - TCC8 bridge shielding

Wednesday 10 Jan 2024, 15:00 → 16:00 Europe/Zurich

• Max. average beam intensity increase wrt. NA62 nominal (3.36E12 p/spill, 2E11 p/s) is a factor 27.5 for BDF (4E13 p/spill, 5.5E12 p/s)
• Bridge shielding studies w/ updated FLUKA model were performed
  • Continuous beam loss in the beam pipe is assumed as source term is not known
  • Data is not normalized to obtain absolute dose rates, but only ratios are of interest
  • 3 different scenarios are compared to the current situation:
    • Additional 15 cm of concrete -> factor 1.4 reduction
    • Additional 1 m of concrete -> factor 7.6 reduction
    • Additional 1 m of concrete + shift of magnets 5 m downstream -> factor 442 reduction
  • Shifting magnets is most efficient mitigation measure

New Actions:

• Shifting of magnets QNL.X0450792 and QNL.X0450795 to be investigated by Luke: Action: Matt
• Shielding studies to be extended: Action: Giuseppe
  • Magnet shift w/o shielding improvement
  • Removal of only first magnet w/o shielding improvement
  • Additional 40 cm iron above beamline inside tunnel
• Organize a meeting with HI-ECN3 WP2 once the above shielding studies have been performed: Action: Claudia
• Investigate cost estimate for shielding improvement and max. possible water flow restriction:  Action: Ludovic

15:00 → 15:30 RP assessment for the TCC8 bridge

Speakers: Giuseppe Mazzola (CERN), Claudia Ahdida

RP_studies_TCC8_bridge.pdf

RP_studies_TCC8_bridge.pptx