ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
A cryogenic fiber maker that continuously extrudes fibers is presented. The design of the fiber maker is based on the use of two cooling stages maintained at different temperatures. The fiber maker consists of two copper reservoirs that are connected in series and are kept at different temperatures. The first reservoir is used to liquefy the gas coming in from an external gas line. The second reservoir is colder than the first; here, the liquid that comes from the first reservoir is frozen and later extruded using the pressure of the external line gas supply. A two-stage closed-cycle refrigerator (a Gifford–McMahon cooler), which uses helium as a working fluid, is used as a cooling system. The frozen gas is extruded through a stainless-steel capillary nozzle with internal diameters between 50 and 250 μm and a length of 2 mm. The temperature of the two reservoirs is set independently, which permits the extrusion rate of the fibers to be controlled and to produce the fibers continuously. Using this system, hydrogen, deuterium, nitrogen, and argon fibers of various diameters were extruded. © 1998 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1148945
