Development of a wavy Stark velocity filter for studying interstellar chemistry. Academic Article uri icon


  • Cold polar molecules are key to both the understanding of fundamental physics and the characterization of the chemical evolution of interstellar clouds. To facilitate such studies over a wide range of temperatures, we developed a new type of Stark velocity filter for changing the translational and rotational temperatures of velocity-selected polar molecules without changing the output beam position. The translational temperature of guided polar molecules can be significantly varied by exchanging the wavy deflection section with one having a different radius of the curvature and a different deflection angle. Combining in addition a temperature variable gas cell with the wavy Stark velocity filter enables to observe the translational and rotational temperature dependence of the reaction-rate constants of cold ion-polar molecule reactions over the interesting temperature range of 10-100 K.

published proceedings

  • Rev Sci Instrum

author list (cited authors)

  • Okada, K., Takada, Y., Kimura, N., Wada, M., & Schuessler, H. A.

citation count

  • 5

complete list of authors

  • Okada, Kunihiro||Takada, Yusuke||Kimura, Naoki||Wada, Michiharu||Schuessler, Hans A

publication date

  • August 2017