Compact Photon Source Stage-2 modeling · 1. The raster is 2 mm x 2 mm ( requires pol. target...
Transcript of Compact Photon Source Stage-2 modeling · 1. The raster is 2 mm x 2 mm ( requires pol. target...
CompactPhotonSource
Stage-2modeling
B.Wojtsekhowskiforthecollabora?on
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γ-Source
29/26/17
1.2µA e- γ
e-
8.8 GeV
Beam Dump in the magnet
B ~ 1.5T
3cm NH3
Distance to target ~200 cm photon beam diameter on target ~0.9 mm
Initial MC simulation shows acceptable background rate on SBS and NPS Detailed analyses of radiation level are in progress
2mm hole
fromtheNovember2014talkattheNPSmee?ng
10%X0
B.Wojtsekhowski
fromthetechnoteforthe2015WACSproposal
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Distance to target ~200 cm photon beam diameter on target ~0.9 mm
3 mm x 3 mm hole 2 mm x 2 mm raster
Current model of the γ-Source
W-powder
Radiator
Cu-core
2.7 µA e-
11 GeV
10%X0
B ~ 3.2 T
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Distance to target ~200 cm photon beam diameter on target ~0.9 mm
3 mm x 3 mm hole
Current model of γ-Source
Cu-core
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Distance to target ~200 cm photon beam diameter on target ~0.9 mm
3 mm x 3 mm hole
Current model of γ-Source
Cu-core
9/26/17 B.Wojtsekhowski
Newdevelopments
1. Therasteris2mmx2mm(requirespol.targetrota?on)2. ThemagnetpoleisshapedtoboostBfieldto3.2T->lengthreduc?on
whichallowslongerfrontshieldandawedgedabsorber.3. CentralabsorberofCuhas1.9xbeVerheatconduc?vity,4.2xlonger
radia?onlengththanW-Cu(20%)alloy.4. W-powderexternalshield(16g/cm3density)forbeVershield.5. Gradual“stepped”openingofthebeamlineforrad.leakreduc?on6. Shieldingrequirementlogic:theradia?onfromthesourceshouldbe
afew?meslowerthanfromthephotonbeaminterac?onwiththematerialofapolarizedtarget.
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Graphical view of changes in the source
W-powder
Cu-core
2.7 µA e- 11 GeV
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Cufillerin100cmlongmagnet
Fe-shield
1.2 µA e- 8.8 GeV
W-Cufiller40cmlongmagnet
Concreteshell
W-Cu-core
2015model 2017model
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Cu-core
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Magnet3Dview
Viewofthemagnet
Viewofthemagnet
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Fieldprofilesalongxandz
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Bvs.XatdifferentZ Bvs.ZatX=Y=0
Tracks1GeVand11GeV
Rangeofthebeamentrance(for11GeV)totheCuabsorber
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Externalshield-1
M2_Box_A_1_W-powder.pngshowsalldimensionsandloca?onoftheouterTungstenshielding
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Externalshield-2
M2_Box_A_2_Exclusion_1_top_view.pngshowsalldimensionsandloca?onoftheexclusionfromBoxAneededforthemagnet.
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Externalshield-3
M2_Box_A_2_Exclusion_1.pngshows3Dandalldimensionsandloca?onoftheexclusionfromBoxAneededforthemagnet.
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Externalshield-4
M2_Box_A_3_Exit-1.pngshowsalldimensionsandloca?onoftheexclusionfromBoxAneededforthebeamline.
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Externalshield-5
M2_Box_A_4_Exit-2.pngshowsalldimensionsandloca?onofthesecondexclusionfromBoxAneededforthebeamline.
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Externalshield-6
M2_Box_A_5_Exclusions_3D.pngshowsallvolumeswhichneedtobeexcludedfromtheExternalshieldbox.
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Coreshielding-1
M2_Box_B_1_W-core.pngshowsalldimensionsandloca?onofthecoreshieldinglocatedinsidethemagnetandmadefromW-Cu(20%)alloy.Theexclusionsneedtobemadefor:a)coilsb)polesc)Cu-coreinsertd)beamopening(3mmx3mm).
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Coreshielding-2
M2_Box_B_2_W-core_3D-view.pngshowsallthatisleioftheW-core.
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Coreshielding-3
M2_Box_B_3_W-core_exclusions.pngshowslistofexclusionsfromasimplebox–thepoles,thecoppercoreandbeamopening.
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Beamopening-1
M2_Box_C_1_Beam_opening.pngshowsdimensionsofthebeamchannel–a3mmx3mmhole.
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Cu-core-1
M2_Box_D_1_Cu-core.pngshowsdimensionsoftheCubeamabsorber(ini?albox).
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Cu-core-2
M2_Box_D_2_Cu-core_exclusions.pngshowsthelistofexclusionsfromtheCu-coreini?albox–poles(Box_E)andBeamopening(Box_C).
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Cu-core-3
M2_Box_D_3_Cu-core_3D.pngshowsa3DviewoftheCucore.
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Pole-1
M2_Box_E_Pole_3D.pngshowsa3Dviewofthemagnetpole
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Pole-2
M2_Box_E_Pole_Side-view.pngshowsasideviewofthemagnetpole
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Pole-3
M2_Box_E_Pole_start.pngshowsdimensionsofthemagnetpoleini?albox
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Pole-4
M2_Box_E_Pole_Top-view.pngshowsdimensionsofthemagnetpole
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Pole-5
M2_Box_E_Pole_Trims.pngisshowingdimensionsofthemagnetpoletrimsandapole?p
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Pole-6
M2_Box_E_Pole_Z-view.pngshowsdimensionsofthepoleandapole?p
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Pole-7
M2_Box_E_Pole_Sweep_back.pngshowsdimensionsofthepolesweep-backcorrec?on
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Pole-8
M2_Box_E_Pole_Tip-plate.pngshowsdimensionsofthepole?pini?albox
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Pole-9
M2_Box_E_transla?on.pngshowsthesizeanddirec?on(x)ofthepoletransla?on
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Magnet-1
M2_Box_F_Side-plate.pngshowsthedimensionsofthemagnetsideplate
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Magnet-2
M2_Box_F_Top-plate.pngshowsthedimensionsofthemagnettopplate
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Coil-1
M2_Coil_dimensions.pngshowsthedimensionsofthemagnetcoil
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Drawings1
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Drawings2
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