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Bubble Chamber Planning Meeting

Bubble Chamber Planning Meeting. 07 August 2013. Agenda. Bubble Chamber progress at Argonne Beamline Layout Bubble Chamber cost estimate: procurement and labor Background from 17 O( γ,n ) 16 O and subsequent neutron elastic scattering with 16 O and 14 N nuclei

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Bubble Chamber Planning Meeting

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  1. Bubble Chamber Planning Meeting 07 August 2013

  2. Agenda • Bubble Chamber progress at Argonne • Beamline Layout • Bubble Chamber cost estimate: procurement and labor • Background from 17O(γ,n)16O and subsequent neutron elastic scattering with 16O and 14N nuclei • Background from 13C(γ,n)12C (in case we decide to use CO2 instead of N2O)

  3. Beamline Layout • HARP to measure beam profile • Fast Valve to protect from vacuum failure • Distance between two BPMs = 55” (was 18” for PEPPo) • Camera for OTR light from Cu foil • Electron Dump: isolated to measure beam current, 2 kW • Beam Properties at Radiator:

  4. 81” Electron Dump 42” 25° Radiator Viewer Ion Pump 25° Fast Valve Viewer HARP BPM Bubble Chamber BPM Valve Quad Cu Collimator Quad Sweep Dipole Corrector Photon Dump Corrector Ion Pump Faraday Cup Vacuum Window 55” 35” 92” 100”

  5. Cost Estimate • Radiator motion and Sweep Dipole must be in FSD • BCM0L02 and Electron Dump in Beam Loss Accounting (BLA) • Cooled: Radiator and Electron Dump. • Uncooled: Photon Collimator and Photon Dump • Re-use PEPPo radiator and beamline • New beamline components: 2 Super Harps + Fast Valve • Summary of labor cost by group:

  6. 17O(γ,n)16O Background

  7. Ion Energy Distribution • Depletion: • 17O depletion=5,000 • 18O depletion=5,000 • Natural Abundance: • 17O: 0.038% • 18O: 0.205%

  8. 13C(γ,n)12C Background • Depletion: • 13C depletion=1,000 • Natural Abundance: • 13C: 1.07% For comparison, 17O(γ,n)16O

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