The copper cathode is used in the DrX photogun as the cathode material. It is manufactured from high purity oxygen free copper. When an UV laser pulse hits the cathode electrons are freed which are subsequently accelerated towards the anode. The cathode features easy laser alignment due to grooves on the cathode, created by single-diamond turning.
|High purity copper||> 99.99 %|
|Damage threshold||100 J/cm²|
|Quantum Efficiency||> 4.5E-5 electron / photon|