JMSSJ On-line

JMSSJ On-line, Vol. 43 (1995) No. 3, pp. 139-148

Dynamical Properties of Amino Acid Beam Seeded in Pulsed Supersonic Expansion		>> Full Text PDF >> References
Hisayuki YAZAWA, Ryoichi SHISHIDO, and Tatsuo ARIKAWA^* ^* Department of Applied Physics, Faculty of Engineering, Tokyo University of Agriculture and Technology (Koganei-shi, Tokyo 184, Japan)

Dynamical properties of amino acid tryptophan molecules seeded in a pulsed supersonic expansion of carrier argon gas have been investigated. Few experiments have been performed so far to obtain the cooling mechanisms of the seeded beam especially in a pulse operation. Measurements relating to the non-equilibrium effects, i.e., the velocity slip, the temperature slip and other important terminal properties of seeded molecular beams have been carried out with the use of a fast optical imaging technique. The flow velocities attained to 99.3% of the ternimal flow velocity for carrier argon gas (-8 K) and 98.9% for seeded tryptophan molecules (-12 K), respectively.

Key words: Seeded beam method, Cooling of amino acid, Velocity slip, Temperature slip, Optical imaging technique