A simplified version of a deuterium pellet gun based on the pipe gun principle is described. The pipe gun is made from a continuous tube of stainless steel and gas is fed in from the muzzle end only. It is indicated that the pellet length is determined by the temperature gradient along the barrel right outside the freezing cell. Velocities of around 1000 m/s with a scatter of ±2% are obtained with a propellant gas pressure of 40 bar.

1.
J. Lafferanderie, presented at the International Pellet Fueling Workshop, La Jolla, California, 30 October–3 November 1985.
2.
J. Lafferanderie, G. Claudet, F. Disdier, P. Kupschus, and K. Sonnenberg, 14th Symposium on Fusion Technology SOFT, Avignon, France, 8–12 September 1986, Proceedings, pp. 1367–1373.
3.
S. K.
Combs
,
S. L.
Milora
, and
C. R.
Foust
,
Rev. Sci. Instrum.
57
,
2636
(
1986
).
4.
P. Andersen, S. A. Andersen, J. Bundgärd, L. Bækmark, B. H. Hansen, V. O. Jensen, H. Kossek, P. K. Michelsen, A. Nordskov, B. Sass, H. So/rensen, and K. V. Weisberg, Riso/‐M‐2650, 1987.
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