1. Radiation Environment at AWAKE Silvia Cipiccia, Eduard Feldbaumer, Helmut Vincke

2. Implemented Geometry and Dose Map Damage to Electronics: Recommended Limits Radiation Environment for Electronics – Laser Beam-block Effect – Graphite Window Effect Summary Implemented Geometry and Dose Map Damage to Electronics: Recommended Limits Radiation Environment for Electronics – Laser Beam-block Effect – Graphite Window Effect Summary

3. p+ Laser merging point 3 mm graphite window Last dipole magnets Plasma cell Electron spectrometer 2 mm Al Laser Beam-block Last focusing magnet

4. Nominal beam: 3x10 11 p+/bunch 1 shot every 30 s 400 GeV Annual intensity: 4.8x10 16 Ultimate beam: Annual intensity: 2.4x10 17 ALL RESULTS ARE SHOWN FOR NOMINAL BEAM

5. From M. Brugger presentation for Cern Fluka user meeting 2008 commercial COTS hardened electronics accelerators Semiconductors Polymers Ceramics Metals and alloys Cumulative damage Stochastic damage From M. Brugger ‘Radiation Damage to electronics at the LHC’, IPAC2012: – Commercial equipment: ~10 7 HEH/cm 2 /year

6. WITH GRAPHITE WINDOW COARSE RESOLUTION FINE RESOLUTION NO LASER BEAM-BLOCK NO GRAPHITE WINDOW

7. WITH GRAPHITE WINDOW +LASER BEAM BLOCK WITH LASER BEAM-BLOCK ONLY

8. safe limit 10 7 cm -2 WITH GRAPHITE WINDOW Above limit! NO LASER BEAM-BLOCK NO GRAPHITE WINDOW

9. safe limit 10 7 cm -2 WITH LASER BEAM-BLOCK ONLY WITH GRAPHITE WINDOW +LASER BEAM BLOCK

10. safe limit 10 13 n/cm 2 WITH GRAPHITE WINDOW NO LASER BEAM-BLOCK NO GRAPHITE WINDOW

11. safe limit 10 13 n/cm 2 WITH GRAPHITE WINDOW + LASER BEAM BLOCK WITH LASER BEAM-BLOCK ONLY

12. 80 cm concrete 160 cm concrete 80 cm concrete 80 cm concrete Shielding 1 Shielding 2 Electronic racks

13. Shielding 1 Shielding 2 Graphite Window + Laser Beam-block

14. Shielding 1 Shielding 2 safe limit 10 7 cm -2 Graphite Window + Laser Beam-block

15. safe limit 10 7 cm -2 Graphite window only

16. – Geometry implemented from last quadrupole to separation wall – Laser Beam-block -> HEH fluence limit exceeded downstream plasma cell in TCC4 – Graphite Window -> HEH fluence limit exceeded downstream plasma cell in TCC4, TT41, TCV4, TT43 -> e-gun electronic – Dose and 1 MeV neutron equivalent fluence at the limit for 4 years run

17. – Next steps: Radiation environment study in service gallery Optional graphite window and laser beam- dump setups (thickness and position) Possible shielding scenarios for electronic racks

18. Thanks for your attention!

19. EXTRA-SLIDES

20. WITHOUT LASER BEAM-BLOCKWITH LASER BEAM-BLOCK ~ 2 orders of magnitude increase in the beam-block area

21. WITHOUT LASER BEAM-BLOCKWITH LASER BEAM-BLOCK safe limit 10 7 cm -2

22. WITHOUT LASER BEAM-BLOCKWITH LASER BEAM-BLOCK safe limit 10 13 n/cm 2