IC Spec Ionisation Chamber
The IC Spec Ion Chamber has been specially designed for high precision X-ray intensity measurements at Synchrotrons and is particularly suited for transmission X-ray absorption spectroscopy measurements such as EXAFS or XANES. It has a large installed base and has undergone extensive testing on beamlines worldwide; it has been shown, at the European Synchrotron Radiation Facility, that it is capable of measuring EXAFS spectra with signal to noise ratio 1:10000.
IC Spec Ion Chamber
The IC Spec Ionisation Chamber consists of a Vacuum / Pressure vessel, evacuated and back-filled with a rare gas, fitted in-line to a synchrotron beamline. X-rays enter and leave the chamber via thin Kapton windows at either end of the vessel.
The X-rays pass between two flat plate electrodes, one held at -3 kV and one floating, causing ion-electron pairs to be formed in the gas, the electric field between the plates causes the free electrons to drift towards the floating electrode and hence a small current flow.
The magnitude of the current flow depends upon X-ray intensity, chamber gas type, chamber gas pressure, electric field and contamination within the chamber.
The Ionisation Chamber is designed to operate at a range of 0.5 to 2 Bar absolute. (0.5 to +1 bar relative to atmospheric pressure).
Specifications
| Description | IC Spec Ion Chamber |
|---|---|
| Part number | ABY02500 |
| Electrode | Aluminium |
| Electrode gap | 30 mm |
| Electrode plate dimensions | 296 mm x 50 mm |
| Window material | 25 µm Conductive Kapton |
| Window aperture | 6 mm x 36 mm |
| Operating voltage | < 3 kV |
| Body material | Aluminium alloy |
| Body length | 342 mm |
| Flange material | Stainless steel |
| Flange diameter | 150 mm |
| Working pressure | 0.5 - 2.0 Bar Abs |
Gridded IC Spec Ion Chamber
The IC Spec Gridded Ionisation Chamber includes an intermediate grid which sits between the beam path and the ground electrode.
The electric field between the plates causes the free electrons to quickly drift towards the floating electrode, while the intermediate negative potential on the grid prevents the drifting of the slower ions to the negative electrode. The overall effect is a quick response to subtle variations in the X-ray beam intensity allowing a high acquisition rate.
Specifications
| Description | Gridded IC Spec Ion Chamber |
|---|---|
| Part number | ABY02511 |
| Electrode | Aluminium |
| Electrode gap | 30 mm |
| Electrode plate dimensions | 296 mm x 50 mm |
| Grid Material | Copper |
| Window material | 25 µm Conductive Kapton |
| Window aperture | 6 mm x 36 mm |
| Operating voltage | < 3 kV |
| Body material | Aluminium alloy |
| Body length | 342 mm |
| Flange material | Stainless steel |
| Flange diameter | 150 mm |
| Working pressure | 0.5 - 2.0 Bar Abs |
I404 Quad Current Integrator
Features
- Four gated integrator channels
- Dynamic range 1 pA to 1 mA
- Integrated digitisation and filtering
- Fibre-optic, RS-232 and RS-485 interfaces
- Integrated calibration test source
- Selection of current and charge integration modes
- Four independent analogue/frequency monitor outputs, configurable to show various analog parameters such as current and position
- Optional high voltage output
- External trigger capability
Applications
- Quadrant photodiode readout
- Low current and charge measurement
- Beam position monitors
Options
- Auxiliary HV output
- Alternative feedback capacitor options
I101 Fast Current Amplifier
Features
- Transimpedance Gain from 103 to 1011 V/A
- Input Noise down to 4.3 fA/√Hz
- Bandwidth up to 500 kHz
- Rise Time down to 700 ns
- Adjustable Bias Voltage
- Manual and Remote Control
Ordering Information
| Item | Part Number |
|---|---|
| IC Spec Ionisation Chamber | ABY02500 |
| Gridded IC Spec Ionisation Chamber | ABY02511 |
| IC Spec Adjustable Stand | ABY02590 |
| Adaptor IC SPEC to CF150 | AHQ2112 |
| Adaptor IC SPEC to CF150 | AHQ2675 |
| Adaptor IC SPEC to CF100 | AHQ2674 |
| Adaptor IC SPEC to CF70 | AHQ2673 |
| Adaptor IC SPEC to KF50 | AHQ2672 |
| Adaptor IC SPEC to KF40 | AHQ2671 |
| I101 Single channel current amplifier | YMCS0043 |
| I101 current amplifier power supply | MPSU0956 |
| IC101 Current Integrator with +3kV HV Auxiliary Source | IC101-XP30 |
| SHV High Voltage Cable, 250mm | CBY01451 |
