
Flood source FS 40A1
Low cost electron flood source for charge neutralisation of insulators or semiconductors in XPS/AES and SIMS applications.
Manufacturer
Prevac
Prevac are a world leader in the design and production of analytical and deposit scientific and research equipment. Their systems operate in a high and ultra high vacuum environment. They design and construct UHV and HV systems fully adapted to the individual requirements of research projects and industrial applications.

Key Features
- High electrom beam current
- Selectable energy ranges
- Stabilised emission
- Beam profile control
Description
The flood source operates over two energy ranges, is fully software controlled and can also be supplied with custom insertion lengths (145 – 421 mm, other on request) and shielding materials, e.g. mu-metal, copper.
Technical data
Mounting flange | DN 40CF (non-rotatable) |
Energy range | 0.01 – 1000 eV |
Sample current | up to 100 μA |
Cathode type | thoriated tungsten |
Shield | Cu (for μ-metal chambers) or μ-metal (for stainless steel chambers) |
Insertion length | min. 145 mm (others on request), OD: 33.6 mm (μ-metal), 35 mm (Cu) |
FWHM | depending on working distance (e.g. 10 mm for distance 30 mm) |
Typical working distance | 20-100 mm |
Bakeout temperature | up to 250°C |
Working pressure | < 5 × 10-6 mbar |
Downloads

Instruments with Electronics Brochure
Options
- Linear shift
- Customised insertion length
- Source shielding material (μ-metal or copper)
Service Support
Comprehensive repairs and servicing
Annual Support Programs
Your metrology instrumentation is a major investment that is critical to your business operation and success. In today’s competitive climate, it is more important than ever to extend the functionality and peak performance of your metrology equipment years beyond the expiration of your factory warranty. CN Tech’s Support Programs will help ensure that your investment is protected, and that you and your instrument’s are always operating at peak performance.
With over 20 years’ experience servicing and repairing you can be assured that your system is in safe hands. The independent services we offer include system relocation, maintenance visits, parts and consumables, and break down interventions.
CN Tech’s Support Programs are an economical way to guarantee optimal working condition:
- Annual Preventive Maintenance
- Priority Technical Assistance
- Preferred Parts Availability
- On-Site User Training
- Remote Diagnostics
- No surprise repair expense and much more!
Support Contact Example
An example of our service and support contracts are shown below:

Metrology & Instrumentation Annual Support Programs 2024/25
CN Tech's Support Programs will help ensure that your investment is protected, and that you and your instrument’s are always operating at peak performance.