CLOSED-CYCLE CRYOGENIC FIBER EXTRUSION SYSTEM

Citation
Hu. Rahman et al., CLOSED-CYCLE CRYOGENIC FIBER EXTRUSION SYSTEM, Review of scientific instruments, 67(10), 1996, pp. 3533-3536
Citations number
11
Categorie Soggetti
Physics, Applied","Instument & Instrumentation
ISSN journal
00346748
Volume
67
Issue
10
Year of publication
1996
Pages
3533 - 3536
Database
ISI
SICI code
0034-6748(1996)67:10<3533:CCFES>2.0.ZU;2-W
Abstract
A fiber extrusion system is described that produces frozen fibers of a lmost any condensible gas. This extruder has the advantage of employin g a closed-refrigeration system. To date, this system has produced fib ers of H-2, D-2, and Ne of a diameter ranging from 100 to 130 mu m. Th e extrusion occurs at a specific temperature which is several degrees below the triple point of these gases. Once the fiber is extruded it c an survive in vacuum for 20 min if the nozzle (extrusion) temperature is lowered to 8 K. The length of these fibers can be of the order of 1 m. D-2 fibers will be used in a staged Z-pinch experiment as a fuel f or thermonuclear fusion. For this application a guiding structure is n eeded to position the fiber between the electrodes with millimeter pre cision, without significantly affecting its quality. (C) 1996 American Institute of Physics.