Fluka Simulations: Electron spectrometer window for AWAKE Jose A. Briz and V. Vlachoudis.

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Presentation transcript:

Fluka Simulations: Electron spectrometer window for AWAKE Jose A. Briz and V. Vlachoudis

Beam and target properties Beam properties Particles: electrons Two types of beams: 1.-Unaccelerated beams: 1.25x10 9 particles per bunch at ~16 MeV 2.-Accelerated beams: 30% x 1.25x10 9 particles per bunch at ~1.3 GeV Window properties 1-m-wide x 6.5-cm-high window Different configurations to test: -2 mm thick Aluminum 5083 H111 or Aluminum 6082T6 -1 mm thick Stainless Steel 304L -1 mm thick Ti 6 Al 4 V

Beam impact location WINDOW WINDOW size: 1 m wide (-50,+50) 6.5 cm high (-3.25,+3.25) Window properties 3 configurations to test: -2 mm thick Aluminum 5083 H111 or Aluminum 6082T6 -1 mm thick Stainless Steel 304L -1 mm thick Ti 6 Al 4 V

Results on energy deposited

Unaccelerated beam for Al5083 Maximum energy density: 60 mJ/cm 3 /bunch

Accelerated beam for Al5083 Maximum energy density: 0.4 mJ/cm 3 /bunch

Unaccelerated beam for Titanium Maximum energy density: 95 mJ/cm 3 /bunch

Accelerated beam for Titanium Maximum energy density: 0.65 mJ/cm 3 /bunch

Unaccelerated beam for SS Maximum energy density: 180 mJ/cm 3 /bunch

Accelerated beam for SS Maximum energy density: 0.65 mJ/cm 3 /bunch

Maximum energy densities - Comparative Most critical beam: Unaccelerated Unacc: mJ/cm 3 /bunch Accel.: mJ/cm 3 /bunch Highest energy deposited in Stainless Steel AcceleratedUnaccelerated SS Al6082T6 Ti Al5083

Temperature increases Material Max. Edep (mJ/cm 3 ) Max. ΔT (ºC) Melting point ( ºC ) Aluminum 5083 or 6082T Stainless Steel Ti 6 Al 4 V Unaccelerated beam Almost negligible temperature increase per pulse

Integrated energy deposition MaterialBeam type Average Incident Energy (MeV) Average deposited energy per primary (MeV) Aluminum 5083 or 6082T6 Unaccel Accel Stainless Steel Unaccel Accel Ti 6 Al 4 V Unaccel Accel

Conclusions Almost negligible temperature increases per pulse ( ΔT≤0.05 ºC) Highest energy deposition in Stainless Steel Average energy deposition per primary ~1 MeV ( MeV)