Beam Dump Line

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Beam Dump Line
Hervé SAVAJOLS (GANIL/TRIUMF)
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Beam dump concept
? Q-poles carriage rail ? Retractable beam line ?
Diagnostic box

• Angular acceptance of 30 mrad
• Dp/p 15 (FWHM)
• Beam spot lt 5 cm
• Brmax 1.7 Tm (11Li3 _at_ 10MeV/n)

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ISAC II experimental hall
Standalone Configuration (April 2005)
Tempory Configuration (Fall 2006)
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Zero degree beam line

• No momentum dispersion
• Beam spot 3mm for 6? mm.mrad
• E 1.5 MeV./n
• Beam spot ?mittance0.5

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Zero degree beam line Instrumented beam dump
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Standalone beam dump

• Map (done)
• ? No mirror plate is needeed
• (2.3 G _at_ 500A)
• Fabricate install adapter
• Old loads motion can be recycled
• Power supplies
• Determine what beams will be dumped
• ? Radiation safety (beam shielding)
• Installation

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Beam dump Identify / select reaction products

• Double focussing device
• Angular acceptance 30mrad
• Energy acceptance 30

• Increase the solid angle
• Selectivity

• Solenoid
• Acts as a lens generating an image of the target
  downstream with
• different focal length depending for beam
  particles and reaction
• products
• Increase easilly the angular acceptance up to
  10º
• Fill the Solenoid with gas (He) ? charge state
  equilibration
• Transport reaction products to a small area for
  identification

• Deep inelastic
• Symetric fusion evaporation
• Fusion-fission

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Solenoid spectrometer to study direct reactions
J.Schiffer (ANL)

• Solenoid device
• Superconducting solenoid
• (0.5m bore, 1.5m long and 5 T)
• Two Si arrays
• (?z1mm, ?t 2ns, ?E100keV)
• Target
• Recoil detector (Z)

light particles follow helical cyclotron
trajectories in B
Z

• Identification ? TOF (cyclotron period is
  independent of energy or scattering angle)
• Angle resolution ? Zpos position
• Energy resolution ? Same Zpos, ?E ? ?ECM

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Solenoid spectrometer to study direct reactions
J.Schiffer (ANL)
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Solenoid spectrometer to study direct reactions
J.Schiffer (ANL)
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Zero degree beam line Instrumented beam dump
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Gas Filled Solenoid
DEEP INELASTIC

• Very neutron-rich RIBs
• (E/A5-10MeV/u, A40-200,
• 106-109 pps)
• Collisions on heavy targets
• Ni, Sn, Pb, Th, U
• Solenoid _at_ grazing angle
• Z A identification of residues
• Accessible exotic species down
• to 110 mb production cross sections

? N50 toward 78Ni ? Deformed N60 region etc
D.Verney IPN Orsay
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Gas Filled Solenoid
DEEP INELASTIC _at_ TRIUMF
ISAC II yield for 1mA of p beam inpinging 1g/cm2
production target
N50 Ga Z31
N60 Rb Z37

• 97Rb U _at_ 5MeV/u (15 above de Coulomb Barrier,
  Grazing angle _at_ 60)
• TOF 2 SeD _at_ 2m dt 250ps (FWHM) Position
  measurement
• Energy Loss IC (3 resolution) / Energy Si
  detector
• ? Mass resolution 1/200
• ? Z resolution 1/70

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The superconductiong solenoid rare isotope
beamline
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 As standalone device, we plan to use the
solenoid for rare isotope search and for fusion
evaporation studies in gas-filled mode 
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Gas Filled Solenoid
FUSION EVAPORATION
SOLITAIRE _at_ ANU (Australia)
Precise measurements of evaporation residue and
fission yields Beam particles are stopped in FC
(0.5º) ? 58Ni 58Ni 32S 89Y