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KEK IR status S.Tanaka KEK
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Hightlight on IR Beam optics: No major change
Beam Pipe design: Main subject Today's IR talk IR assembly: Main subject recently Discuss on next session Cooling: preparation stage Services: depend on assembly and design of IR
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Beam pipe & shield design
Meetings PXD meeting IR Technical IR optics IR assembly SVD mecha BG simulation PXD-DAQ superKEKB検討会 SVD IR region Correlation BG simulation Beam optics Company Beam pipe & shield design IP straight section Crotch part near IP Crotch part near QCS IP Cooling Joint QCS group PXD structure: MPI SVD structure: HEPHY 2010/7/7 2010/9/30
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Beam pipe & shield design
Meetings PXD meeting IR Technical IR optics IR assembly SVD mechanical BG simulation PXD-DAQ superKEKB検討会 SVD IP chamber production BG simulation Beam optics Company Beam pipe & shield design IP straight section Crotch part near IP Crotch part near QCS IP Cooling Joint QCS group PXD structure: MPI SVD structure: HEPHY 2010/7/7 2010/9/30
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Current beam pipe design
Pipes for the incoming beam are straight. Their cross section become smaller near the IP. The minimum distance of the duct wall from the beam stay clear is 2 mm. Tip scattering (unknown) *10 Collimation (9mmf) Sawtooth Structure design HOM can escape through the pipes for the outgoing beam. Shows better HOM characteristics than design #1 K. Kanazawa
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Beam pipe Production schedule
conceptual design Production Assembly Tanaka
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Current Space assignment near IP
PXD requirement Tanaka
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Current Space assignment near IP
The direction of cooling pipe at manifold has been changed The cooling manifold is sitting on crotch part. Tanaka
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Cooling pipe connection on IP chamber
Tanaka
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Issues: Brush wellman prefer SVD2 production procedure
SVD2 design Our Current design (Cooling manifold sit on crotch part) Productin cost is estimated factor 5 larger than SVD2(900万円） Tanaka Kohriki 10
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IP chamber production scheme(SVD2)
Reviewing IP-chamber assembly Tanaka Kohriki 11
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Inner Be tube hight0.5mm、width0.7mm 20100930 20100915 Tanaka Kohriki
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Subassembly:Ta Backward tube
Need modification of inner size （Inner Be tubeと現物合わせ？） High temp. braze Tanaka Kohriki 13
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Subassembly:Ta Forward tube
High temp. braze Need modification of inner size （Inner Be tubeと現物合わせ？） Tanaka Kohriki 14
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Subassembly:Inner Be and Ta tubes
Low temp. braze Low temp. braze Tanaka Kohriki 15
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Final-assembly 2 EBW ⅣはEBW Ⅲまでの熱歪みによる長さの変化に影響を受けにくい構造にした？ Point 3,4 joints are considered to absorb the thermal deformation stress. 3 4 1 Next IP production process is quite different with SVD2, so we should feed back how to make it. 6 4 3 5 1 2 Tanaka Kohriki 16
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Beam pipe & shield design
Meetings PXD meeting IR Technical IR optics IR assembly SVD mechanical BG simulation PXD-DAQ superKEKB検討会 SVD Beam pipe(crotch) production BG simulation Beam optics Company Beam pipe & shield design IP straight section Crotch part near IP Crotch part near QCS IP Cooling Joint QCS group PXD structure: MPI SVD structure: HEPHY 2010/7/7 2010/9/30
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Crotch part design Current base line is similar with SVD2 case.
Cooling jacket is difficult to absorb thermal stress on production. 2010/9/30
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Beam pipe & shield design
Meetings PXD meeting IR Technical IR optics IR assembly SVD mecha BG simulation PXD-DAQ superKEKB検討会 SVD SR beam test BG simulation Beam optics Company Beam pipe & shield design IP straight section Crotch part near IP Crotch part near QCS IP Cooling Joint QCS group PXD structure: MPI SVD structure: HEPHY 2010/7/7 2010/9/30
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Beam test SR effect estimation
Tip scattering (unknown) Sawtooth Structure design
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Beam test Setup Test piece : Ta with Au plating Next April?
ADC, counter APD+Amp. readout 1mm Scinti.(LYSO) 5 keV X-ray Horizontal stage Be window Setup：The angular dependence can measure by the combination of Horizontal stage and the inclined stage
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summary The conceptual beam pipe design has been finished.
We start discussing how to produce it. We have always took care about PXD services and SVD structure design which satisfy space allocation. The detailed structures (thickness of crotch part, sawtooth etc.) will decided by the test beam or simulation Tanaka SVD2 beam pipe(spare)
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