公开(公告)号：US3626046A

公开(公告)日：1971-12-07

申请号：US88554569

申请日：1969-12-16

Applicant: INST PLASMAPHYSIK GMBH

Inventor： KRAUSE HORST ,  SIGEL RICHARD

IPC: B23K26/12 ,  F25J1/00 ,  H05H1/22 ,  H05H6/00 ,  B29C13/00 ,  B29D3/00

CPC classification number: F25J1/0221 ,  B23K26/12 ,  B23K26/1224 ,  F25J1/001 ,  F25J1/0276 ,  F25J2205/20 ,  F25J2290/42 ,  G21B1/19 ,  H05H6/00 ,  Y02E30/16 ,  Y10S376/916

Abstract: A method for making a thin, self-supporting disc from a substance, such as hydrogen, which is a gas at room temperature said disc being eventually located in a vacuum. A metal member is provided which defines a hole having a diameter small enough that at a sufficiently low temperature a liquid film of the substance will form in or across the hole due to surface tension. The atmosphere surrounding the hole is first reduced to a high vacuum and then the space or zone surrounding the hole is made smaller. A predetermined quantity of the gas to be solidified is brought into this lesser space and a cryogen cools the gas below its boiling point. This causes the gas to condense on the surface of the metal member and form a liquid film in the hole. The liquid film is further cooled until it solidifies in the form of a thin, self-supporting disc. An apparatus including a diffusion pump, a vacuum chamber, and a reciprocating glass bell within the vacuum chamber is provided to carry out the method.