The chalk river helium jet and skimmer system
Academic Article
Overview
Identity
Additional Document Info
Other
View All
Overview
abstract
We have developed a helium jet and skimmer system intended as an interface between a target location at the Chalk River tandem accelerator and the ion source of an on-line separator presently under construction. The system consists of a target chamber, a 125 cm long capillary, and a one stage skimmer chamber. The designs of the target and skimmer chambers allow us to vary a large number of independent flow and geometrical parameters with accurate reproducibility. Experiments with the -delayed proton emitter 25Si (t 1 2 = 218 ms) produced in the reaction 24Mg(3He, 2n)25Si show that under optimized conditions about 75% of the reaction products leaving the target are transported to the skimmer. Of those, more than 90% pass through the skimmer orifice, which separates off 97.5% of the transport gas, helium. By introducing an additional helium flow across the skimming orifice the amount of helium separated off the transport jet can be increased to beyond 99.85%, leaving the high throughput of recoils unaffected. 1976.