Faraday Probe / Faraday Cup
The primary function of a Faraday probe is to measure the spatial distribution of ion current density. Probe scans also give total ion current, beam uniformity, and divergence. For a pulsed source, fast acquisition can record TOF arrival times.
Single Faraday Probe
Single-point ion current-density measurement for spatial scans and beam profiles
XHINS-FP measures ion current density at one position. A linear or rotary mechanism moves the probe to measure the beam profile, uniformity, and divergence. For a pulsed ion source, the calibrated trigger gives time zero. The system records I(t) across a known flight path. TOF data give the ion velocity distribution. If the ion mass is known, the system can calculate kinetic energy.
Key Features
- Measures ion current density at one spatial position
- Uses a linear or rotary mechanism to measure beam profiles, uniformity, and divergence
- Configurable aperture and electron-suppression structure control the acceptance angle and secondary-electron effects
- Measures TOF with a fast current front-end, a synchronized trigger, and a known flight path
Key Specifications
| Item | Specification |
|---|---|
| Range | pA – mA (customizable) |
| Aperture / resolution | 0.5–50 mm options |
| Materials | Cu / SS + anti-sputter coating |
| Interfaces | KF / CF / custom flanges |
Faraday Probe Array
Synchronized multi-channel measurement of spatial ion current density, with transient-beam and TOF arrival detection
The array measures ion current density at multiple positions at the same time. Linear or planar layouts give the spatial beam profile without probe movement. The channels can also record transient beam changes. For a pulsed ion source, a synchronized trigger, known flight path, and fast acquisition give TOF arrival times at multiple positions.
Key Features
- Measures ion current density at multiple spatial positions at the same time
- Linear or planar layouts give beam profiles, uniformity, and differential data
- Configurable channel count and dynamic range for the applicable beam intensity and spatial range
- Measures TOF at multiple positions with a pulsed trigger, known flight path, and fast acquisition
Key Specifications
| Item | Specification |
|---|---|
| Channel count | Multi-channel array (custom) |
| Bandwidth | DC – MHz (electronics dependent) |
| Time resolution | Set by front-end bandwidth, sample rate, and trigger jitter |
| Layout & size | Linear / planar / custom |