DH_50

The DH_50 photomultiplier uses temperature control to reduce dark current and extend the spectral range of the S20 photocathode. 

Housing a multi-alkali photomultiplier tube (S20 photocathode) with end window, mu-metal shielding and a PCB-based dynode chain, reliable operation can be assured. Peltier elements, powered by the CPS50, provide temperature control. 

The high-voltage power supply module 215 maintains the photocathode at a high negative voltage. The photocurrent generated by this detector is best measured using the 487 picoameter or the 477 preamplifier followed by the 496 lock-in amplifier. 

The quick-change mounting flange supplied with the DH_50 is compatible with the full range of Bentham monochromators and accessories.