Design alternatives for cryogenic beryllium windows in an ICF cryostat

Technical Report · Thu Nov 01 04:00:00 EST 1984

DOI:https://doi.org/10.2172/6338080· OSTI ID:6338080

Pitts, J H; Landon, P R; Gerhard, M A

We propose three backup design options for the cryogenic beryllium windows in a cryostat. The first, a beryllium flange option, reduces peak tensile stresses to 1/3 of that in the original design. The second, a fiberglass flange option, reduces peak tensile stresses to 1/2 of that in the original design and is also low cost. A third option, replacing the beryllium windows with spherical Mylar caps, would require a development program. Even though Mylar has been used previously at cryogenic temperature, this option is still considered unreliable. The near-zero ductility of beryllium at cryogenic temperature makes the reduction of peak tensile stresses particularly desirable. The orginal window design did function satisfactorily and the backup options were not needed. However, these options remain open for possible incorporation in future cryostat designs.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6338080
• Report Number(s): UCID-20257; ON: DE85003094
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700208* -- Fusion Power Plant Technology-- Inertial Confinement Technology
ALKALINE EARTH METALS
BERYLLIUM
CONFINEMENT
CONTROL EQUIPMENT
CRYOSTATS
DESIGN
DUCTILITY
ELEMENTS
EQUIPMENT
INERTIAL CONFINEMENT
MECHANICAL PROPERTIES
METALS
OPENINGS
PLASMA CONFINEMENT
STRESSES
TENSILE PROPERTIES
THERMOSTATS
WINDOWS