X-ray Imager
X-ray Electron Multiplied cameras
The XEM camera incorporates a megapixel electron multiplied CCD that enables photon amplification down to near single photon detection.
Direct on chip amplification process allows to lift up the signal generated by a single X-ray photon right above the read out noise of the EMCCD sensor.
A significant dose reduction can be achieved whilst maintaining good modulation contrast. A high efficiency fibre optic taper is directly coupled to the EMCCD sensor and protects it from radiation damage. It receives a high resolution scintillator which enables 20 lp/mm resolution depending on input size.
The camera operates at up to 15fps (30 fps in binning 2x2) with simultaneous exposure and read out cycles, thus enabling 100% duty cycle in 2D area scan mode. Full vertical binning offers transfer rate up to 1KHz in line scan mode.
The sensors can be tiled with other cameras in order to increase active area up to 56 x 28mm without frame rate losses.
Photonic Science Ltd selects premium grade EMCCDs with:
- 8 microns pixel size
- photon counting sensitivity with up to 2,000 amplification gain
- Input size varies from 11mm up to 34mm diagonal
- Beryllium and fibre optic input windows
- High quantum efficiency giving single photon detection capability
- 2D fast readout up to 15 fps at megapixel resolution
- 1D scanning mode
- Time delay integration for enhanced sensitivity
- Photon counting sensitivity with real time acquisition
- High spatial resolution down to < 15 microns
- 1002 (h) x 1004 (v) CCD array
- Input pixel size: 8 x 8, 24 x 24 microns
- Active area: 8 x 8 mm, 24 x 24 mm
- 15 fps at full resolution @ 17.5 MHz
- Readout noise: < 1 electron @ with on chip CCD gain
- Full well capacity: 30,000 electrons in binning 1x1
- Dark current: 1 electron / pixel / second
- Full vertical binning for 1D scanning at 1kHz
- Time Delay intergation option for enhanced sensitivity / dynamic range
- 12-bit digitisation
- Photon counting acquisition mode with 32-bit frame accumulation
- GdOS: Tb scintillator for operation from 5-55 keV with minimum feature recognition of 20 lp / mm: typically 14 microns for the smallest input size up to 50 microns for the largest input size
- CsI:Tl structured scintillator for operation from 30-100 keV
- Camera link / GigE interface
- Multiplexed acquisition with multi camera systems
- Synchronisation / control: via TTL pulse
- Fluoroscopy imaging
- Low dose X-ray imaging
- 2 dimensional photon counting
- X-ray nano CT
- Coherent Diffraction Imaging
- 2 dimensional X-ray light element analysis
- X-ray microscopy
- High sensitivity X-ray scanning
- Screening of small proteins crystals