ILC Positrons

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Slide 1 July 26, 2007 Toward the ILC America s ILC Positrons J. C. Sheppard SLAC July 26, 2007 Positron Production for the ILC

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ILC Positrons. Positron Production for the ILC. J. C. Sheppard SLAC July 26, 2007. Positron Production for the ILC. What is the ILC e+ System How to make e+ Something about polarization Who works on this stuff What are the design issues What next. Parameter Reference Upgrade - PowerPoint PPT Presentation

Transcript of ILC Positrons

  • RDR ParametersCentre of undulator to target: 500mActive (K=0.92, period=1.21mm) undulator: 147mPhoton beam power: 131kWBeam spot: >1.7 mm rms

    Global Design Effort

  • Baseline Target Design Wheel rim speed (100m/s) fixed by thermal load (~8% of photon beam power)Rotation reduces pulse energy density from ~900J/g to ~24J/gCooled by internal water-cooling channelWheel diameter (~1m) fixed by radiation damage and capture opticsMaterials fixed by thermal and mechanical properties and pair-production cross-section (Ti6%Al4%V)Wheel geometry (~30mm radial width) constrained by eddy currents.20cm between target and rf cavity.T. Piggott, LLNLDrive motor and water union are mounted on opposite ends of through-shaft.

    Global Design Effort

    July 26, 2007

    Toward the ILCAmericas

    Target Progress

    Baseline target/capture

    RAL, ANL and Cornell have done Eddy current simulation which produce consistent results with multiple codes. Estimates for power dissipation in the target are >100kW for a constant field and are considered excessive.Evaluation of ceramic target material is on-going. No conclusions.Radiation damage of the superconducting coil is still TBD but may not be worthwhile unless a solution can be found for the eddy currents.ANL simulation of beam heating in windows shows that an upstream window is feasible but a downstream window is not.

    Alternative target/capture

    Capture efficiency for the lithium lens focusing and wave solenoid is still TBDThermal heating and stress for the lithium lens is still on-going.Thermal stress calculation for the liquid metal target is still on-going

    Global Design Effort

    July 26, 2007

    Toward the ILCAmericas

    Capture versus Optical Matching Device TypeFrom F. Zhou, W. LiuPositron Capture (arb. units)No OMD l xfrmPulsed FCImmersed00.10.20.30.4

    Global Design Effort

    July 26, 2007

    Toward the ILCAmericas

    Optical Matching Device (OMD)Optical Matching Device factor of 2 in positron yield (3 if immersed target)DC solenoid before target or pulsed flux concentrator after targetPulsed device is the baseline design Target spins in the magnetic field of the OMDEddy currents in the target need to calculate powerMagnetic field is modified by the eddy currents effect on yield??Eddy current mitigationReduce amount of spinning metalDo experiment to validate eddy current calculationsLook for low electrical / high thermal conductivity Ti-alloysOther materials such as ceramicsNo OMDUse focusing solenoidal lens (1/4 wave) lower fieldsOMD is upgrade to polarization(??)

    Global Design Effort

    July 26, 2007

    Toward the ILCAmericas

    Eddy Current ExperimentEddy current calculation mesh -S. Antipov, W. Liu, W. Gai - ANLProposed experimentLayout at CockcroftInstitute/Daresbury(this summer)

    Global Design Effort

    July 26, 2007

    Toward the ILCAmericas

    Calculated Eddy Current PowerNominal RPMssTiAlV = 6e5

    Global Design Effort

    force_graph (2)

    347.9307261.02652174.05399434.74487073.8125

    605.8727454.82785303.417451092.08098514.09

    862.4121648.03296432.6061733.26448827.572

    1116.9512840.3953561.54152350.09848734.212

    1369.00341031.6617690.15242936.1568499.797

    1618.00051221.6008818.36413486.91168241.258

    1863.48941410.0441946.10393999.72127989.7153

    2105.00981596.69861073.29054474.1117768.9355

    2342.24121781.39661199.86834910.2817581.9375

    2574.79741963.94821325.80045310.1067430.3154

    2802.29762144.20751451.00055675.25447308.007

    3024.60522321.99851575.37236008.27737212.1035

    3241.4062497.1751698.87396311.01567137.478

    3452.61992669.60911821.48996586.39847082.016

    3658.07672839.10331943.11336835.63537044.743

    3857.61433005.67872063.7167061.1177021.8896

    4051.313169.16462183.28697265.0087009.26

    4239.3293329.54442301.72277449.5967003.814

    4421.26953486.68292419.017616.027003.3496

    4597.4343640.61722535.10137766.63047006.4136

    4767.8653791.23342649.96567012.0786

    4932.64063938.46262763.5027018.9062

    5091.99464082.52222875.76597026.025

    5245.90674223.3832986.71077033.571

    5394.4024360.7883096.29377041.007

    5537.6574494.8793204.47857048.264

    5676.0794625.7833311.29447055.4175

    5809.72364753.43163416.68077061.9795

    5938.3834877.8483520.59997068.2617

    6062.2944999.24763623.11557074.2466

    6181.7545117.6053724.15777080.2646

    6296.88135232.8793823.69687086.206

    6407.685345.06933921.7317091.8457

    6514.7215454.32474018.37137097.999

    6617.795560.67774113.59037104.232

    6716.73635664.35064207.3897110.5454

    6811.8025765.384299.64847116.8413

    6903.2975863.58354390.3747123.251

    6991.33645959.00834479.6547129.274

    7075.86436051.814567.51467134.997

    Force, Newtons

    RPMs

    =2.5e6

    =2.0e6

    =1.5e6

    =1.0e6

    copper, sigma=60e6

    power_graph

    3.64351842.73346111.82268764.552633374.07673

    11.0625168.3046175.54004328.89154155.45718

    22.46209316.87844711.26750973.55805229.91997

    37.78925728.43268218.998356137.29874295.5003

    56.9770442.93709628.723698218.46786353.75607

    79.9392660.35465640.43226315.18057407.16925

    106.57863680.6447254.110565425.4629456.95618

    136.78331103.753369.74231547.43726504.82462

    170.43726129.6264387.31051679.2892551.7129

    207.40916158.20308106.79798819.4753598.5386

    247.5562189.42021128.182966.5369645.5925

    290.7471223.20741151.436261119.2866693.2799

    336.82788259.4918176.5371276.5563741.6848

    385.661298.19797203.46221437.533791.0681

    437.09564339.23828232.178381601.1885841.76105

    490.97656382.54675262.658781766.8673893.7087

    547.1761428.03217294.878051934.0062946.6813

    605.58124475.62328.797332102.2161000.4834

    665.99884525.2172364.38812270.91041054.951

    728.335576.7541401.6162439.95681109.9705

    792.4617630.1368440.44791165.47

    858.25854685.27576480.83761221.2599

    925.63605742.1315522.764161277.2091

    994.4636800.6243566.18911333.3501

    1064.6191860.62897611.073061389.587

    1136.0125922.09357657.376831445.9031

    1208.6075984.9679705.07391502.3099

    1282.30381049.1625754.118961558.6978

    1356.94231114.6063804.470031615.1239

    1432.46261181.2749856.10791671.5775

    1508.82621249.0916908.982671728.1324

    1585.95921317.975963.052371784.7618

    1663.7611387.8531018.28171841.4053

    1742.28361458.69321074.66491898.274

    1821.37961530.43621132.1621955.2606

    1900.91431603.07691190.742012.367

    1980.86151676.56351250.3312069.5664

    2061.2231750.77981310.90112126.8982

    2141.95071825.67421372.44122184.211

    2222.94651901.23061434.92582241.5237

    RPMs

    Power, kWatts

    =2.5e6

    =2.0e6

    =1.5e6

    =1.0e6

    coppersigma=60e6

    Chart2

    17.91844234.16533758.77814574.07673

    52.70969493.25342137.92554155.45718

    102.393875167.16621219.5084229.91997

    163.43126247.57973296.44662295.5003

    232.66753329.8297367.39557353.75607

    307.58377411.33136432.54587407.16925

    386.21976490.776492.7137456.95618

    467.00104567.24817548.663504.82462

    548.93634640.77057601.9193551.7129

    631.2936711.2819652.375598.5386

    713.49634778.5715701.2782645.5925

    794.8631843.3275749.0801693.2799

    875.3363905.5721796.08844741.6848

    954.57465965.42706842.84045791.0681

    1032.27551022.75964889.67487841.76105

    1108.61491078.405936.7054893.7087

    1183.2791132.88983.8209946.6813

    1256.61791185.95321031.57641000.4834

    1328.54581237.28161079.76651054.951

    1398.78321287.59251128.50711109.9705

    1467.27721337.06181177.91371165.47

    1534.33971385.88351228.18441221.2599

    1600.04941434.03061279.381277.2091

    1664.62761481.76271331.38541333.3501

    1728.0331529.00941384.1211389.587

    1789.98771575.97841437.38771445.9031

    1850.92221622.78471491.24371502.3099

    1910.59521669.52971545.53021558.6978

    1968.86881716.21421600.20041615.1239

    2026.05441763.08561655.24931671.5775

    2082.25541810.06321710.64921728.1324

    2137.78121857.1211766.25221784.7618

    2192.74561904.12661822.06271841.4053

    2247.11041951.25021877.94171898.274

    2300.8941998.6651934.00421955.2606

    2353.85182046.49881990.13232012.367

    2405.86962094.5162046.32032069.5664

    2457.01782142.73972102.61132126.8982

    2507.72142191.16462158.91432184.211

    2557.9552239.95532215.29762241.5237

    power

    sigma=2.5e6sigma=2e6sigma=1.5e6sigma=1e6sigma=10sigma=20sigma=40e6sigma=60e6

    1004.55263331003.64351841002.73346111001.822687610017.918442010034.165337010058.778145010074.07673

    252.6315828.89154174.3589811.062516174.358988.304617174.358985.540043174.3589852.7096940174.3589893.253420174.35898137.925540174.35898155.45718

    405.2631573.55805248.7179422.462093248.7179416.878447248.7179411.267509248.71794102.3938750248.71794167.166210248.71794219.50840248.71794229.91997

    557.8947137.29874323.0769337.789257323.0769328.432682323.0769318.998356323.07693163.431260323.07693247.579730323.07693296.446620323.07693295.5003

    710.5263218.46786397.4358856.97704397.4358842.937096397.4358828.723698397.43588232.667530397.43588329.82970397.43588367.395570397.43588353.75607

    863.1579315.18057471.7948679.93926471.7948660.354656471.7948640.43226471.79486307.583770471.79486411.331360471.79486432.545870471.79486407.16925

    1015.7895425.4629546.1539106.578636546.153980.64472546.153954.110565546.1539386.219760546.1539490.7760546.1539492.71370546.1539456.95618

    1168.421547.43726620.5128136.78331620.5128103.7533620.512869.74231620.5128467.001040620.5128567.248170620.5128548.6630620.5128504.824621

    1321.0526679.2892694.87177170.43726694.87177129.62643694.8717787.31051694.87177548.936340694.87177640.770570694.87177601.91930694.87177551.7129

    1473.6842819.4753769.2308207.40916769.2308158.20308769.2308106.79798769.2308631.29360769.2308711.28190769.2308652.3750769.2308598.5386

    1626.3158966.5369843.5897247.5562843.5897189.42021843.5897128.182843.5897713.496340843.5897778.57150843.5897701.27820843.5897645.5925

    1778.94741119.2866917.9487290.7471917.9487223.20741917.9487151.43626917.9487794.86310917.9487843.32750917.9487749.08010917.9487693.2799

    1931.5791276.5563992.3077336.82788992.3077259.4918992.3077176.537992.3077875.33630992.3077905.57210992.3077796.088440992.3077741.6848

    2084.21041437.5331066.6666385.6611066.6666298.197971066.6666203.46221066.6666954.5746501066.6666965.4270601066.6666842.8404501066.6666791.0681

    2236.8421601.18851141.0256437.095641141.0256339.238281141.0256232.178381141.02561032.275501141.02561022.7596401141.0256889.6748701141.0256841.76105

    2389.47361766.86731215.3846490.976561215.3846382.546751215.3846262.658781215.38461108.614901215.38461078.40501215.3846936.705401215.3846893.7087

    2542.10521934.00621289.7435547.17611289.7435428.032171289.7435294.878051289.74351183.27901289.74351132.8801289.7435983.820901289.7435946.6813

    2694.73682102.2161364.1025605.581241364.1025475.621364.1025328.797331364.10251256.617901364.10251185.953201364.10251031.576401364.10251000.4834

    2847.36842270.91041438.4615665.998841438.4615525.21721438.4615364.38811438.46151328.545801438.46151237.281601438.46151079.766501438.46151054.951

    30002439.95681512.8206728.3351512.8206576.75411512.8206401.6161512.82061398.783201512.82061287.592501512.82061128.507101512.82061109.9705

    1587.1794792.46171587.1794630.13681587.1794440.44791587.17941467.277201587.17941337.061801587.17941177.913701587.17941165.47

    1661.5385858.258541661.5385685.275761661.5385480.83761661.53851534.339701661.53851385.883501661.53851228.184401661.53851221.2599

    1735.8975925.636051735.8975742.13151735.8975522.764161735.89751600.049401735.89751434.030601735.89751279.3801735.89751277.2091

    1810.2565994.46361810.2565800.62431810.2565566.18911810.25651664.627601810.25651481.762701810.25651331.385401810.25651333.3501

    1884.61541064.61911884.6154860.628971884.6154611.073061884.61541728.03301884.61541529.009401884.61541384.12101884.61541389.587

    1958.97441136.01251958.9744922.093571958.9744657.376831958.97441789.987701958.97441575.978401958.97441437.387701958.97441445.9031

    2033.33341208.60752033.3334984.96792033.3334705.07392033.33341850.922202033.33341622.784702033.33341491.243702033.33341502.3099

    2107.69241282.30382107.69241049.16252107.6924754.118962107.69241910.595202107.69241669.529702107.69241545.530202107.69241558.6978

    2182.05131356.94232182.05131114.60632182.0513804.470032182.05131968.868802182.05131716.214202182.05131600.200402182.05131615.1239

    2256.41021432.46262256.41021181.27492256.4102856.10792256.41022026.054402256.41021763.085602256.41021655.249302256.41021671.5775

    2330.76931508.82622330.76931249.09162330.7693908.982672330.76932082.255402330.76931810.063202330.76931710.649202330.76931728.1324

    2405.12821585.95922405.12821317.9752405.1282963.052372405.12822137.781202405.12821857.12102405.12821766.252202405.12821784.7618

    2479.4871663.7612479.4871387.8532479.4871018.28172479.4872192.745602479.4871904.126602479.4871822.062702479.4871841.4053

    2553.84621742.28362553.84621458.69322553.84621074.66492553.84622247.110402553.84621951.250202553.84621877.941702553.84621898.274

    2628.2051821.37962628.2051530.43622628.2051132.1622628.2052300.89402628.2051998.66502628.2051934.004202628.2051955.2606

    2702.56421900.91432702.56421603.07692702.56421190.742702.56422353.851802702.56422046.498802702.56421990.132302702.56422012.367

    2776.9231980.86152776.9231676.56352776.9231250.3312776.9232405.869602776.9232094.51602776.9232046.320302776.9232069.5664

    2851.2822061.2232851.2821750.77982851.2821310.90112851.2822457.017802851.2822142.739702851.2822102.611302851.2822126.8982

    2925.6412141.95072925.6411825.67422925.6411372.44122925.6412507.721402925.6412191.164602925.6412158.914302925.6412184.211

    30002222.946530001901.230630001434.925830002557.955030002239.9553030002215.2976030002241.5237

    force_graph

    347.9307261.02652174.05399434.7448

    605.8727454.82785303.417451092.0809

    862.4121648.03296432.6061733.2644

    1116.9512840.3953561.54152350.0984

    1369.00341031.6617690.15242936.156

    1618.00051221.6008818.36413486.9116

    1863.48941410.0441946.10393999.7212

    2105.00981596.69861073.29054474.111

    2342.24121781.39661199.86834910.281

    2574.79741963.94821325.80045310.106

    2802.29762144.20751451.00055675.2544

    3024.60522321.99851575.37236008.2773

    3241.4062497.1751698.87396311.0156

    3452.61992669.60911821.48996586.3984

    3658.07672839.10331943.11336835.6353

    3857.61433005.67872063.7167061.117

    4051.313169.16462183.28697265.008

    4239.3293329.54442301.72277449.596

    4421.26953486.68292419.017616.02

    4597.4343640.61722535.10137766.6304

    4767.8653791.23342649.9656

    4932.64063938.46262763.502

    5091.99464082.52222875.7659

    5245.90674223.3832986.7107

    5394.4024360.7883096.2937

    5537.6574494.8793204.4785

    5676.0794625.7833311.2944

    5809.72364753.43163416.6807

    5938.3834877.8483520.5999

    6062.2944999.24763623.1155

    6181.7545117.6053724.1577

    6296.88135232.8793823.6968

    6407.685345.06933921.731

    6514.7215454.32474018.3713

    6617.795560.67774113.5903

    6716.73635664.35064207.389

    6811.8025765.384299.6484

    6903.2975863.58354390.374

    6991.33645959.00834479.654

    7075.86436051.814567.5146

    Force, Newtons

    RPMs

    =2.5e6

    =2.0e6

    =1.5e6

    =1.0e6

    Chart3

    1711.08673262.55225612.9047073.8125

    2886.8085107.317553.91558514.09

    3931.32186418.1988427.838827.572

    4830.59867317.8068762.1838734.212

    5590.36877924.9128827.5188499.797

    6225.61048325.58754.8918241.258

    6752.9148581.0438614.9237989.7153

    7186.8548729.5958443.5817768.9355

    7543.7818805.8168271.9017581.9375

    7836.93958829.9228098.64557430.3154

    8076.66758813.3087938.367308.007

    8268.868773.0297792.58547212.1035

    8423.658714.6197661.0227137.478

    8545.8048642.967545.50637082.016

    8639.178559.537445.73637044.743

    8710.4128473.0537359.71537021.8896

    8761.0378387.8827284.2437009.26

    8796.8668302.1837221.47857003.814

    8819.6238213.7617168.08847003.3496

    8829.4728127.60847123.4217006.4136

    8827.918044.46537086.9477012.0786

    8818.267965.04257058.70367018.9062

    8801.9957888.71247037.9687026.025

    8781.0977816.4647023.2067033.571

    8755.9047747.4577013.31057041.007

    8725.5557682.33547006.7557048.264

    8692.6337621.21247003.44637055.4175

    8656.3187564.12457002.3217061.9795

    8616.35457510.66367002.9527068.2617

    8574.4217461.5167005.1447074.2466

    8531.1287415.94047008.6357080.2646

    8487.8327373.50057012.7167086.206

    8444.977333.4067017.3517091.8457

    8402.3627296.08647021.9727097.999

    8360.0557261.93757026.9997104.232

    8317.1567231.14757031.9817110.5454

    8273.3237202.6387036.90237116.8413

    8228.8647176.3077041.91167123.251

    8185.21347151.977046.70567129.274

    8142.2317130.00547051.5177134.997

    Chart4

    7073.8125

    8514.09

    8827.572

    8734.212

    8499.797

    8241.258

    7989.7153

    7768.9355

    7581.9375

    7430.3154

    7308.007

    7212.1035

    7137.478

    7082.016

    7044.743

    7021.8896

    7009.26

    7003.814

    7003.3496

    7006.4136

    7012.0786

    7018.9062

    7026.025

    7033.571

    7041.007

    7048.264

    7055.4175

    7061.9795

    7068.2617

    7074.2466

    7080.2646

    7086.206

    7091.8457

    7097.999

    7104.232

    7110.5454

    7116.8413

    7123.251

    7129.274

    7134.997

    force

    sigma=2.5e6sigma=2e6sigma=1.5e6sigma=1e6sigma=10e6sigma=20e6sigma=40e6sigma=60e6

    100434.7448100347.9307100261.02652100174.053991001711.086701003262.552201005612.90401007073.8125

    252.631581092.0809174.35898605.8727174.35898454.82785174.35898303.41745174.358982886.8080174.358985107.310174.358987553.91550174.358988514.09

    405.263151733.2644248.71794862.4121248.71794648.03296248.71794432.606248.717943931.32180248.717946418.1980248.717948427.830248.717948827.572

    557.89472350.0984323.076931116.9512323.07693840.3953323.07693561.5415323.076934830.59860323.076937317.8060323.076938762.1830323.076938734.212

    710.52632936.156397.435881369.0034397.435881031.6617397.43588690.1524397.435885590.36870397.435887924.9120397.435888827.5180397.435888499.797

    863.15793486.9116471.794861618.0005471.794861221.6008471.79486818.3641471.794866225.61040471.794868325.50471.794868754.8910471.794868241.258

    1015.78953999.7212546.15391863.4894546.15391410.0441546.1539946.1039546.15396752.9140546.15398581.0430546.15398614.9230546.15397989.71531

    1168.4214474.111620.51282105.0098620.51281596.6986620.51281073.2905620.51287186.8540620.51288729.5950620.51288443.5810620.51287768.9355

    1321.05264910.281694.871772342.2412694.871771781.3966694.871771199.8683694.871777543.7810694.871778805.8160694.871778271.9010694.871777581.9375

    1473.68425310.106769.23082574.7974769.23081963.9482769.23081325.8004769.23087836.93950769.23088829.9220769.23088098.64550769.23087430.3154

    1626.31585675.2544843.58972802.2976843.58972144.2075843.58971451.0005843.58978076.66750843.58978813.3080843.58977938.360843.58977308.007

    1778.94746008.2773917.94873024.6052917.94872321.9985917.94871575.3723917.94878268.860917.94878773.0290917.94877792.58540917.94877212.1035

    1931.5796311.0156992.30773241.406992.30772497.175992.30771698.8739992.30778423.650992.30778714.6190992.30777661.0220992.30777137.478

    2084.21046586.39841066.66663452.61991066.66662669.60911066.66661821.48991066.66668545.80401066.66668642.9601066.66667545.506301066.66667082.016

    2236.8426835.63531141.02563658.07671141.02562839.10331141.02561943.11331141.02568639.1701141.02568559.5301141.02567445.736301141.02567044.743

    2389.47367061.1171215.38463857.61431215.38463005.67871215.38462063.7161215.38468710.41201215.38468473.05301215.38467359.715301215.38467021.8896

    2542.10527265.0081289.74354051.311289.74353169.16461289.74352183.28691289.74358761.03701289.74358387.88201289.74357284.24301289.74357009.26

    2694.73687449.5961364.10254239.3291364.10253329.54441364.10252301.72271364.10258796.86601364.10258302.18301364.10257221.478501364.10257003.814

    2847.36847616.021438.46154421.26951438.46153486.68291438.46152419.011438.46158819.62301438.46158213.76101438.46157168.088401438.46157003.3496

    30007766.63041512.82064597.4341512.82063640.61721512.82062535.10131512.82068829.47201512.82068127.608401512.82067123.42101512.82067006.4136

    1587.17944767.8651587.17943791.23341587.17942649.96561587.17948827.9101587.17948044.465301587.17947086.94701587.17947012.0786

    1661.53854932.64061661.53853938.46261661.53852763.5021661.53858818.2601661.53857965.042501661.53857058.703601661.53857018.9062

    1735.89755091.99461735.89754082.52221735.89752875.76591735.89758801.99501735.89757888.712401735.89757037.96801735.89757026.025

    1810.25655245.90671810.25654223.3831810.25652986.71071810.25658781.09701810.25657816.46401810.25657023.20601810.25657033.571

    1884.61545394.4021884.61544360.7881884.61543096.29371884.61548755.90401884.61547747.45701884.61547013.310501884.61547041.007

    1958.97445537.6571958.97444494.8791958.97443204.47851958.97448725.55501958.97447682.335401958.97447006.75501958.97447048.264

    2033.33345676.0792033.33344625.7832033.33343311.29442033.33348692.63302033.33347621.212402033.33347003.446302033.33347055.4175

    2107.69245809.72362107.69244753.43162107.69243416.68072107.69248656.31802107.69247564.124502107.69247002.32102107.69247061.9795

    2182.05135938.3832182.05134877.8482182.05133520.59992182.05138616.354502182.05137510.663602182.05137002.95202182.05137068.2617

    2256.41026062.2942256.41024999.24762256.41023623.11552256.41028574.42102256.41027461.51602256.41027005.14402256.41027074.2466

    2330.76936181.7542330.76935117.6052330.76933724.15772330.76938531.12802330.76937415.940402330.76937008.63502330.76937080.2646

    2405.12826296.88132405.12825232.8792405.12823823.69682405.12828487.83202405.12827373.500502405.12827012.71602405.12827086.206

    2479.4876407.682479.4875345.06932479.4873921.7312479.4878444.9702479.4877333.40602479.4877017.35102479.4877091.8457

    2553.84626514.7212553.84625454.32472553.84624018.37132553.84628402.36202553.84627296.086402553.84627021.97202553.84627097.999

    2628.2056617.792628.2055560.67772628.2054113.59032628.2058360.05502628.2057261.937502628.2057026.99902628.2057104.232

    2702.56426716.73632702.56425664.35062702.56424207.3892702.56428317.15602702.56427231.147502702.56427031.98102702.56427110.5454

    2776.9236811.8022776.9235765.382776.9234299.64842776.9238273.32302776.9237202.63802776.9237036.902302776.9237116.8413

    2851.2826903.2972851.2825863.58352851.2824390.3742851.2828228.86402851.2827176.30702851.2827041.911602851.2827123.251

    2925.6416991.33642925.6415959.00832925.6414479.6542925.6418185.213402925.6417151.9702925.6417046.705602925.6417129.274

    30007075.864330006051.8130004567.514630008142.231030007130.0054030007051.517030007134.997

    Sheet3

    July 26, 2007

    Toward the ILCAmericas

    Pulsed Flux Concentrator: 7T, 1 ms, 5 HzPulsed Flux Concentrator, circa 1965: Brechna et al.

    Global Design Effort

    July 26, 2007

    Toward the ILCAmericas

    OMD ProgressPlans and Actions (baseline target/capture):ANL will simulate eddy currents in the pulsed magnet configuration.UK will evaluate suitability of non-conducting materials for the targetDaresbury/Cockroft/RAL will spin a one meter target wheel in a constant magnetic field and will measure the forces.Eddy simulations will be calculated and benchmarked against this configurationPlans and Actions (alternative targets/capture):ANL will determine the capture efficiency for wave focusing optics and lithium lens.LLNL will evaluate the survivability of lithium lens to beam stressCornell will specify an initial design of a liquid metal target. LLNL will calculate the Stress-strain behavior of the outgoing beam window.

    Global Design Effort

    July 26, 2007*Toward the ILC CCLRC

    Undulator ChallengesHigh fieldsPushing the limits of technologyShort PeriodsShorter periods imply higher fieldsNarrow aperturesVery tight tolerances - Alignment criticalCold bore (4K surface)Cannot tolerate more than few W of heating per moduleMinimising impact on electron beamMust not degrade electron beam properties but have to remove energy from electronsCreating a vacuumImpossible to use conventional pumps, need other solutionMinimising costMinimise total length, value engineering

    Global Design Effort

    July 26, 2007*Toward the ILC CCLRC

    UK Undulator Recent HighlightsTwo 12mm period SC undulator prototypes built and testedPeriod reduced to 12mm from 14mmBetter, more reproducible, fabrication techniqueFull inclusion of iron for the first timeOne 11.5mm period SC undulator built and testedPeriod further reduced to RDR value of 11.5mmNew SC wire used (more SC and less Cu)Field strength measured greater than expected, possibly due to increase in SC content of wireBest ever field quality results (well within spec)Full length prototype will use these parametersFull length prototype construction started4m prototype design completeFabrication has commencedUndulator impact studies ongoingEmittance growth due to misalignments & wakefields shown to be

  • Remote-Handling Module and PlugM. Woodward, RALCryocooler (if required) + vacuum pump + water pump Details of vertical drive for target wheel not yet considered.Module contains target, capture optics and first accelerating cavity.

    Global Design Effort

    July 26, 2007

    Toward the ILCAmericas

    TRIUMF ISAC FACILITY

    Global Design Effort

    July 26, 2007

    Toward the ILCAmericas

    Visit to ORNL

    Global Design Effort

    July 26, 2007

    Toward the ILCAmericas

    Visit to ORNL

    Global Design Effort

    July 26, 2007

    Toward the ILCAmericas

    Visit to ORNL

    Global Design Effort

    July 26, 2007

    Toward the ILCAmericas

    Visit to ORNLThe remote handling systems for the SNS target is estimated to have cost about $100M

    Off the cuff estimate to work up ILC e+ Remote Handling Systems for the EDR would be about 4-5 FTE spread out over 3 years

    Global Design Effort

    AmericasJuly 26, 2007*Toward the ILC

    ILC StatusReference Design Report (RDR) completedDesign feasibility Alternative technologies (cost saving, risk reduction ..)R&D priorities4-volume report, Executive Summary, Physics Case, Accelerator, Detectors ~ 700 pages producedPrinted version in AugustNow setting up Engineering Design Phase (EDR)Define EDR, (nn% design complete?)Choose final design technologiesSetup structure to get it done (regional balance to optimize use of resources)Three year timescale

    Global Design Effort

    July 26, 2007

    Toward the ILCAmericas

    What do we wantRDR to EDR phaseILC management is trying to match ILC tasks to world wide ILC resourcesILC positron source EDR leadership may well migrate to EuropeStrong US input is still needed to finish EDR Design of all aspects of the ILC e+ Sub-systems needs helpNeed people to consult with Need collaborators to help with designNeed collaborators to take the lead in the designNeed collaborators to do the design

    Global Design Effort

    July 26, 2007

    Toward the ILCAmericas

    Polarized Electron Source

    (A. Brachmann, SLAC)

    Global Design Effort

    July 26, 2007

    Toward the ILCAmericas

    Select Positron References, 1ILC RDR Positron Chapter: http://media.linearcollider.org/report-apr03-part1.pdf sec. 2.3, pg. 45 ffILC Positron Source Collaboration Meetings1st meeting at RAL September, 2006: http://www.te.rl.ac.uk/ILC_Positron_Source_Meeting/ILCMeeting.html

    2nd meeting at IHEP, Beijing January, 2007 : http://hirune.kek.jp/mk/ilc/positron/IHEP/ILC Notes1. ILC Target Prototype Simulation by Means of FEM Antipov, S; Liu, W; Gai, W [ILC-NOTE-2007-011] http://ilcdoc.linearcollider.org/record/6949

    2. On the Effect of Eddy Current Induced Field , Liu, W ; Antipov, S; Gai, W [ILC-NOTE-2007-010] http://ilcdoc.linearcollider.org/record/6948

    3. The Undulator Based ILC Positron Source: Production and Capturing Simulation Study Update, Liu, W ; Gai, W [ILC-NOTE-2007-009] http://ilcdoc.linearcollider.org/record/6947Other Notes1. F.Zhou,Y.Batygin,Y.Nosochkov,J.C.Sheppard,and M.D.Woodley,"Start-to-end beam optics development and multi-particle tracking for the ILC undulator-based positron source", slac-pub-12239, Jan 2007. http://www.slac.stanford.edu/cgi-wrap/getdoc/slac-pub-12239.pdf

    2. F.Zhou,Y.Batygin,A.Brachmann,J.Clendenin,R.H.Miller,J.C.Sheppard,and M.D.Woodley,"Start-to-end transport design and multi-particle tracking for the ILC electron source", slac-pub-12240, Jan 2007. http://www.slac.stanford.edu/cgi-wrap/getdoc/slac-pub-12240.pdf

    3. A.Mikhailichenko, " Liquid metal target for ILC*."*. Jun 2006. 3pp.Prepared for European Particle Accelerator Conference (EPAC 06), Edinburgh, Scotland, 26-30 Jun 2006.Published in *Edinburgh 2006, EPAC* 816-818

    Global Design Effort

    July 26, 2007

    Toward the ILCAmericas

    Select Positron References, 2Other Notes, contd4. A.A. Mikhailichenko , "Test of SC undulator for ILC.",Jun 2006. 3pp. Prepared for European Particle Accelerator Conference (EPAC 06), Edinburgh, Scotland, 26-30 Jun 2006.Published in *Edinburgh 2006, EPAC* 813-815.5. A.Mikhailichenko, "Issues for the rotating target", CBN-07-02, 2007, http://www.lns.cornell.edu/public/CBN/2007/CBN07-2/CBN07-2.pdf6. A.Mikhailichenko, "Positron Source for ILC:A perspective", CBN-06-06, 2006, http://www.lns.cornell.edu/public/CBN/2006/CBN06-1/CBN06-1.pdf7. Preliminary Investigations of Eddy Current Effects on a Spinning Disk, W.T. Piggott, S. Walston, and D. Mayhall. UCRL-TR-224467, Sep. 8, 20068. Positron Source Target Update, W.T. Piggott, UCRL-PRES-227298, Jan. 16, 2007.9. Computer Calculations of Eddy-Current Power Loss in Rotating Titanium Wheels and Rims in Localized Axial Magnetic Fields. D.J. Mayhall, W. Stein, and J. Gronberg, UCRL-TR-221440, May 17, 200610. A Preliminary Low-Frequency Electromagnetic Analysis of a Flux Concentrator, D.J. Mayhall, UCRL-TR-221994, June 13, 2006

    Also see Posipol 2007 and Posipol 2006:

    http://events.lal.in2p3.fr/conferences/Posipol07/

    http://posipol2006.web.cern.ch/Posipol2006/

    Global Design Effort