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PhotoDetachment

-              v2
+              v3
 The Photo-detachment region is where our ion beam is crossed with a laser beam. [[br]]
 We use a 1.4 kW diode laser, at 975 nm. The laser crosses the ion beam inside a floating cell.
 The floating cell is a rectangular tube that is electrically isolated from the rest of the apparatus.
 We can put an arbitrary potential on the cell, this will control our center of mass ion-neutral collision
+We use a 1.4 kW diode laser, at 975 nm. The laser crosses the ion beam inside a floating cell. [[br]]
+The floating cell is a rectangular tube that is electrically isolated from the rest of the apparatus. [[br]]
+We can put an arbitrary potential on the cell, this will control our center of mass ion-neutral collision [[br]]
 energy.