WINDOW DESIGN
Hemispherical: t = 0.5PL s = 0.5D
Ellipsoidal: t = 0.5PD s = .25D
Torispherical: t = 0.885PD s = .169D
t = min. thickness s = sagitta
Minimize window thickness
- Needs to meet FNAL safety standards: S < Su/4, Sy/1.5
Choose low Z (large LR) material: AlBeMet
- Properties of AlBeMet better for our requirements
- BUT.. need to measure its properties at LH2 temperatures
- Minimum thickness depends on shape (ASME Standard)
P = pressure diff. S = max. stress E = weld eff.