Investigation of different types of photocathodes

Investigation of different types of photocathodes

• Investigation of different types of photocathodes

• Prioritising metal photocathodes: bulk and thin film

• Aim to find metals with higher QE (than Cu)

• Aim to optimise procedure for preparation in the gun

A survey of 10 bulk metals, chosen for their:

• A survey of 10 bulk metals, chosen for their:

• Low work function

• Vacuum compatibility

Investigate the Cu surface of samples exposed to oxygen plasma with

• Investigate the Cu surface of samples exposed to oxygen plasma with

• Power levels between 10-100%

• Treatment times between 10-40 minutes

• Post heat treatment (~250°C, ~600°C)