| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1689081 | Vacuum | 2016 | 6 Pages |
•Kinetic characteristics of single crystal sapphire irradiated by keV electrons are studied.•A change of charging characteristics of sapphire is observed after ion bombardment.•Secondary electron emission yield is found to depend on the relief on the sapphire surface. The mechanisms are discussed.
Kinetic characteristics of sapphire (α-Al2O3) single crystal irradiated by keV electrons are studied. We compare untreated sapphire with surfaces bombarded with Ar+ ions and/or coated with a thin Al film. The electron emission yield and the charging characteristics for the untreated sapphire surface and for that bombarded by Ar+ ions differ significantly. This difference is less when the sapphire sample is coated with a thin film of Al. We propose an explanation for the observed effects.
