%0 Journal Article %T Observed photodetachment in parallel electric and magnetic fields %A John N. Yukich %A Tobias Kramer %A Christian Bracher %J Physics %D 2003 %I arXiv %R 10.1103/PhysRevA.68.033412 %X We investigate photodetachment from negative ions in a homogeneous 1.0-T magnetic field and a parallel electric field of approximately 10 V/cm. A theoretical model for detachment in combined fields is presented. Calculations show that a field of 10 V/cm or more should considerably diminish the Landau structure in the detachment cross section. The ions are produced and stored in a Penning ion trap and illuminated by a single-mode dye laser. We present preliminary results for detachment from S- showing qualitative agreement with the model. Future directions of the work are also discussed. %U http://arxiv.org/abs/physics/0304039v2