MEASUREMENT OF ELECTRON-TRANSPORT IN LIQUID ARGON IN CROSSED ELECTRIC AND MAGNETIC-FIELDS

We report on a measurement of excess electron drift properties in liquid argon in the presence of crossed electric and magnetic fields. The electric field strength was varied between 6 and 110 V/cm. Using a superconducting solenoid magnetic field strengths up to 5 T were achieved. The magnetic field B over arrow pointing right was oriented perpendicular to the electric field E over arrow pointing right and the components of the drift velocity upsilon(D) over arrow pointing right parallel and perpendicular to the electric field were measured, from which were derived the drift mobility mu(D), Hall angle theta(H) and Hall mobility mu(H). An increase of mu(H) compared to mu(D) in the density range of the mobility maximum is observed. The ratio mu(H)/mu(D) for B --> 0 takes a value between 2.0 and 2.5 depending on the electric field strength. The Hall angle theta(H) as function of the magnetic field strength deviates from a linear behavior only in the density region showing a high mobility. The results are compared with available data.