Lithium Hydride Issues - Capp.iit.edu - Illinois Institute of Technology

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Thermal Properties <strong>of</strong> LiH • From 293 K to 80 K, LiH contracts about 20% more than Al. • LiH melts at 956 K. • LiH thermal conductivity is not well known (varies with preparation?): Watt/cm/K 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 LiH Thermal Conductivity 0 200 400 600 800 1000 Temperature (K) Data 1 Data 3 Data 4 Data 13 Data 14 Fit to 13 Melt. Pt. TJR 8/12/2002 6
LiH Absorber Properties in a Cooling Channel • Values are for a 5 cm thick 30 cm diameter LiH absorber (7.5 MeV loss) with edge at 80 K. • Thermal conductivity assumed constant, estimated from above fit, for temperature ~20% below peak. • Heating power and temperature rise both scale with intensity and with turns around a cooling ring. • Half-aperture wedge absorbers will have significantly less heating power and lower peak temperatures (depends on details). Beam mu/sec 4×10 14 4×10 14 4×10 14 4×10 14 Ring Beam Sigma Heating Peak Turns Power Temp. 1 5 cm 482 W 145 K 1 2 cm 482 W 530 K 1 1 cm 482 W Melts 10 5 cm => 3 cm 4.8 kW Melts TJR 8/12/2002 7
Page 1 and 2: Lithium Hydride Issues Tom Roberts
Page 3 and 4: Definition of F cool F cool is the
Page 5: LiH Thermal Issues • Water coolin
Page 9 and 10: Possible Fabrication/Handling Scena

Lithium Hydride Issues - Capp.iit.edu - Illinois Institute of Technology

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