The flood electron source is designed to provide a wide, homogeneous electron beam with adjustable spot size, intensity, and energy. Applications include space simulation, materials testing, charge neutralization, and detector testing.
Energy range 1 keV to 40 keV
Beam type divergent, flood beam for large sample area
Sample size typically up to 150 mm diameter at 500 mm working distance. Actual beam characteristics will be specified with the quote. Larger or smaller spot sizes available.
Beam current max.
Working distance up to 1000 mm standard (larger WD possible)
Standby operation reduces the filament heating current and is used during longer operation pauses.
The unique design of STAIB’s electron sources has several advantages over the classic triode gun configuration.
Beam blanking is one such advantage. The beam can be switched on and off electrically, using a manual switch, controlling electron extraction from the filament. This method avoids the generation of stray electrons.
The computer control option for STAIB electron guns consists of two parts.
1: Power supply computer control plug
The electron source power supply is equipped with an optional computer connection plug for use with analog control signals. The electron source system can either be operated by using the manual control dials, or by using the optional computer control. The control voltages can either be provided by 3rd party software through a suitable DAC interface, or by the STAIB computer control module.
2: STAIB computer control module
The STAIB computer control option includes the cables and microprocessor interface to connect to the power supply computer control plug. The STAIB software sends the input signals to the power supply to control the system functions. Full parameter sets can be stored, modified, and reused. The advanced version of the STAIB computer control module can retrieve and copy the adjusted values from the manual control dials, providing the user with previously unavailable ease of use.
The option runs under the WindowsTM XP, WindowsTM 7, WindowsTM 10 operating systems, using a USB connection.
The Beam Current Controller (BCC) is a microcontroller based unit used to regulate the electron beam current of the electron gun, as used in RHEED or AUGER techniques.
Regulation of the electron beam current to a fixed, precise, user-adjusted value is important when the electron gun is working in a higher pressure range and when using reactive gases in the vacuum chamber. Once adjusted, the BCC will regulate the beam current to the assigned value, even after gun parameters like beam energy or focus are modified. Operating values can be saved and will be kept after restarting the BCC module, ensuring identical experimental conditions.