Reactor system for electroporation

A process for the electroporation of cells, comprising the steps of:

• (1) providing a reactor system, comprising:
• a reactor chamber having a length and a width, whereby the reactor chamber contains a central section along its length, wherein the length of the reactor chamber is at least 1.5 times the width of the reactor chamber;
• a first pulse generator to which two electrodes (A1) and (A2) are connected, wherein the electrodes (A1) and (A2) are located in the reactor chamber in the central section at essentially opposite ends of the central section such that they are, when measured in the length direction, at least a distance equalling half the width of the reactor chamber apart;
• and
• a second pulse generator to which two electrodes (B1) and (B2) are connected, wherein the electrodes (B1) and (B2) are located in the reactor chamber in the central section at essentially opposite ends of the central section such that they are, when measured in the length direction, at least a distance equalling half the width of the reactor chamber apart,
• whereupon electrical field lines from said electrodes run essentially in the length direction of the reactor chamber whereby to produce a homogeneous electrical field the length of the reaction chamber, and
• (2) sending a pulse to the electrodes to generate the homogeneous electric field;
• (3) performing electroporation of the cells with the reactor system.