Tandem beamline L2 is the second, or 30° beam port entering the Square room.
The Ben-Itzhak group has one experiment mounted to this beamline.

Time-of-flight Spectrometer

This beamline is equipped with the time-of-flight spectrometer used by Eric Wells to measure charge transfer in very slow proton-on-deuterium "half" collisions. The system includes an imaging recoil ion detector and a cryogenically cooled jet target.

The line is also equipped with a magnetic quadrupole doublet lens and two sets of magnetic steerers.

Recent Publications from this Beamline:

• "Charge Transfer in Very Slow H⁺ + D(1s) Half Collisions",
  PhD Thesis of Eric Wells, 2000. (available here)
• "Charge Transfer and Elastic Scattering in Very Slow H⁺ + D(1s) Half Collisions"
  E. Wells, K. D. Carnes, B. D. Esry, and I. Ben-Itzhak
  Phys. Rev. Lett. 86, 4803 (2001).
• "Asymmetric branching ratio for the dissociation of HD⁺(1s σ)"
  E. Wells, B. D. Esry, K. D. Carnes, and I. Ben-Itzhak
  Phys. Rev. A 62, 062707 (2000).
• "Symmetry Breakdown in Ground State Dissociation of HD⁺"
  I. Ben-Itzhak, E. Wells, K. D. Carnes, Vidhya Krishnamurthi, O. L. Weaver, and B. D. Esry
  Phys. Rev. Lett. 85, 58 (2000)