Masao KURIKI (Hiroshima University)

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Presentation transcript:

Masao KURIKI (Hiroshima University) Summary of PosiPol2016 Masao KURIKI (Hiroshima University)

PosiPol2016 11th PosiPol WS 22 participants(16 EU, 1 US, 5 Japan) + online 2016/9/16-18 @ LAL-Orsay Laser Compton : 6 E-Driven : 9 Undulator : 7 Other : 2 14 – 16 September 2016 PosiPol2016, Paris, France

Active Sliding Contact Cooling Demo Conceptual Illustration W. Liu Rotating 1meter diameter Target Wheel at 2000 rpm (100 m/s) while extracting ~10kW by using active sliding contact cooling. Target wheel is driven by a magnetically coupled drive motor which separates the motor from the vacuum. Stability of wheel controlled by heavy duty machine spindle. Temperature of wheel controlled by 4 Active Sliding Contact Cooling Pads with luburicant. Cooling Pad’s temperature controlled by water/coolant. Heat applied to wheel using UHV radiant filament heaters. Full Size Target Wheel Ready for Operations in Vacuum 14 – 16 September 2016 PosiPol2016, Paris, France

Cooling Demonstration in Air stage heater Cooling pads dT/dt (oc/s) Estimated cooling /heating power (W) Upstream Downstream 1 Off Removed 9.36E-05 2.29E-05 --- 2 Applied -1.51E-04 -2.83E-04 -14.6 -27.4 3 On, medium 1.17E-03 1.38E-03 113.5 133.8 4 4.18E-04 4.40E-04 -72.9(equivalent) -91.2(equivalent) 5 1.26E-03 1.41E-03 122.2 136.7 6 2.26E-04 2.51E-04 -100.3(equivalent) -112.4(equivalent) 7 1.01E-03 1.24E-03 97.8 120.2 8 -3.73E-04 -4.66E-04 -36.2(net) -45.2(net) 9 -1.16E-03 -1.32E-03 -112.5 -128.0

Cooling of the ILC e+ target by thermal radiation S. Riemann Ecm and luminosity determine energy deposition in target Ø = 1m; 2000rpm, 0.4X0 Ti6Al4V (Pe+ ≤30%) Edep ≤ 7kW  cooling by thermal radiation is an option Ebeam [GeV] Edep [kW] DTmax/pulse [K] dpa Nominal luminosity High luminosity 120 5.0 66 0.035 - 175 (ILC EDMS) 3.9 125 0.06 250 (ILC EDMS) 2.0 130 4.1 195 250 2.3 85 0.05 4.6 128 A. Ushakov, 2015 A. Ushakov, Update 2015

Radiative cooling model Rotating wheel consists of Ti rim (e+ target) and Cu (radiator) Heat path: thermal conduction Ti  Cu Thermal radiation from Cu to stationary water cooled coolers Target, radiator and cooler are in vacuum Radiating area is adjusted by fins Goal: keep target temperature below limit for failure of Ti6Al4V Reliable fatigue limit at elevated temperatures? Ti6Al4V photons Cooler (Cu) Felix Dietrich S. Riemann POSIPOL 2016: Status radiative thermal e+ target cooling

Target Material Test at MAMI, Mainz A. Ignatenko

Thermomechanicle Examination :F. Dietrich