The chalk river helium jet and skimmer system Academic Article uri icon

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.

published proceedings

  • Nuclear Instruments and Methods

author list (cited authors)

  • Schmeing, H., Koslowsky, V., Wightman, M., Hardy, J. C., MacDonald, J. A., Faestermann, T., ... Graham, R. L.

citation count

  • 17

complete list of authors

  • Schmeing, H||Koslowsky, V||Wightman, M||Hardy, JC||MacDonald, JA||Faestermann, T||Andrews, HR||Geiger, JS||Graham, RL

publication date

  • December 1976