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

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1.2 1 0.8 0.6 0.4 0.2 0 Comparison of Absorber Materials Transverse Cooling Effectiveness 2 Fcool GH2 LH2 LHe LiH Li CH4 Be B C Al TJR 8/12/2002 2
Definition of F cool F cool is the fractional Energy-loss per radiation length. The standard equation for Ionization cooling of transverse emittance: dε 1 = − 2 ds β dE ds ε 1 + 2 E β 2 β ⊥( 0. 014) 2E m LR At equilibrium: ε = ¤¢¥ 2 β⊥ ( 0. 014) E β⊥ ( 0. 014) 1 ≡ 2E m dE 2E m F cool LR ds ¦ £ ¢¡ Fcool characterizes the absorber material; the brackets characterize the lattice and kinematics. This ignores variations in β ⊥ over the varying thicknesses of the different absorber materials (which can be important, especially for LH2 windows). The 4-d transverse cooling effectiveness is the square of Fcool. TJR 8/12/2002 3 ¤¢¥ ¦ 2 £ ¢¡
Page 1: Lithium Hydride Issues Tom Roberts
Page 5 and 6: LiH Thermal Issues • Water coolin
Page 7 and 8: LiH Absorber Properties in a Coolin
Page 9 and 10: Possible Fabrication/Handling Scena

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

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