Lissajoux Module
Ultrafast electron techniques for microscopy
The Lissajoux Module (XFEG & CFEG compatible) adds ultrafast capability to your existing transmission electron microscope with no compromise in performance.
The module integrates directly into your current system, using an RF deflection cavity to chop the continuous beam into ultrashort pulses. Switching from normal to pulse mode takes minutes. Without the need to replace your TEM or invest in an amplified femtosecond laser for pulse generation, your setup gets high time resolution at previously unobtainable precision.
The Lissajoux Module consists of the RF deflection cavity insert and a control cabinet. The cavity insert is placed between the electron gun and the condenser system of your TEM. The cavity makes the continuous beam trace a Lissajous pattern on the C2 condensor aperture. This produces a chopped beam with pulse lengths from 100 fs to 10 ps at a 75 MHz or 2.4 GHz repetition rate.
The gun crossover is positioned at the center of the RF cavity, preventing growth in emittance and energy spread from chopping. This means that the peak brightness is conserved, leaving spatial resolution in pulsed mode unchanged from continuous operation. The module provides a synchronization output for your pump laser, enabling pump-probe experiments.
Control software is included.
Specifications:
- Repetition rate: 75 MHz or 2.4 GHz
- Pulse duration: 100 fs – 10 ps
- Spatial resolution: unchanged from continuous mode
- Gun compatibility: XFEG & CFEG
The Invisible Visible
Ultrafast processes - events that unfold on femtosecond timescales - remained invisible for decades. These processes occur too fast to be captured by conventional instruments, leaving entire classes of physical, chemical, and biological phenomena effectively out of reach. Our technology changes that.
Pump probe measurements
Doctor X instruments achieve superior time resolution in electron microscopy. Researchers can now observe phase transitions as they happen, watch phonons vibrate and capture photosynthesis dynamics at the molecular level. This is like moving from photography to video at the atomic scale.
In a pump probe scheme a pump laser pulse is used to excite the sample. The pulsed electron beam that probes the sample is synchronized to the laser pulse. Varying the delay between the pump and the probe allows the lissajoux to make the invisible visible.
Doctor X makes research instruments that give scientists control over time, energy, and measurement at a precision that wasn’t accessible before.
Doctor X works alongside research institutes, universities, and industry partners worldwide. These collaborations with engineers, scientists, and inventors matter, as they share a commitment to making instruments that unlock new research. These are our peers.
Together, we continue to move beyond science dreams.
X LAB is where Doctor X develops the next generation of ultrafast electron techniques. This is the heart of the company - where ideas become instruments.
Research here pushes beyond current products. Rotating mode cavities for faster pulse repetition. Pulse shaping for application-specific beam profiles. X-ray generation through the Smartlight project. Each direction opens new capabilities for researchers who need them.
The work happens the same way it always has at Doctor X: making, testing, refining, and sometimes discarding. Not every idea becomes a product. The ones that do will extend what ultrafast electron techniques can unlock - and what researchers can discover.
