Türkçe

The First Operation of Two Color Mode in Infrared Free Electron Laser

524
2024-02-18 10:10:09
Çeviriyi gör

The Fritz Haber Institute of the Max Planck Institute in Berlin has achieved a technological milestone. The infrared free electron laser operates in dual color mode for the first time. This globally unique technology makes it possible to conduct experiments on synchronous dual color laser pulses, opening up new possibilities for research.

There are over a dozen free electron lasers worldwide, with significant differences in size, wavelength range, and cost. However, they all generate strong short radiation pulses. In the past few decades, free electron lasers have become an important radiation source and have been widely applied in basic research and applied science.

FHI researchers have now collaborated with American partners to develop a method that can simultaneously generate two different colored infrared pulses. This innovation is particularly important for studying the temporal processes of solids and molecules.

In FEL, the electron beam is first accelerated by an electron accelerator to a very high kinetic energy, reaching a speed close to the speed of light. Then, the fast electrons pass through a undulator, where they are forced into a path similar to a turbulent vortex by a strong magnetic field with periodic changes in polarity.

The oscillation of electrons leads to the emission of electromagnetic radiation, and its wavelength can be changed by adjusting the electron energy and/or magnetic field strength. For this reason, FEL can be used to generate laser like radiation in almost all parts of the electromagnetic spectrum, ranging from long terahertz to short X-ray wavelengths.

Since 2012, FEL has been operating at FHI, generating strong pulsed radiation in the mid infrared range, with wavelengths continuously adjustable in the range of 2.8 to 50 micrometers. In recent years, scientists and engineers at FHI have been dedicated to dual color expansion, installing a second FEL branch to generate far-infrared radiation with wavelengths between 5 and 170 microns.

The FIR-FEL branch includes a new hybrid magnet wave generator, which was specifically built at FHI. In addition, a 500 MHz kick chamber is installed behind the electron linear accelerator for lateral electron deflection. The kicking chamber can change the direction of high-energy electron beams at a speed of 1 billion times per second.

In June 2023, the FHI team demonstrated the first "laser" of the new FIR-FEL, guiding all electron beams from LINAC to FIR-FEL. In December 2023, they demonstrated the dual color operation for the first time. In this mode, the strong oscillating electric field formed in the kicking chamber causes every two electron beams to deflect to the left and every other electron beam to deflect to the right.

In this way, the high repetition rate electron beam from LINAC is divided into two beams, with each beam having half the repetition rate; One is guided to the old MIR-FEL, and the other is guided to the new FIR-FEL. In each FEL, changing the magnetic field intensity of the oscillator can continuously tune the wavelength up to four times.

For about a decade, FHI-FEL has enabled FHI's research team to conduct experiments on nonlinear solid-state spectroscopy and surface science from the spectra of clusters, nanoparticles, and biomolecules in the gas phase. To date, there have been approximately 100 peer-reviewed publications.

The new dual color mode is not available in any other IR FEL facility worldwide, and it will enable new experiments such as MIR/MIR and MIR/FIR pump probe experiments. This is expected to open up new opportunities for experimental research in different fields such as physical chemistry, materials science, catalytic research, and biomolecular research, thereby contributing to the development of new materials and drugs.

Source: Laser Net

İlgili öneriler
  • The new Casiris H6 4K UST tricolor laser projector is about to be launched through Indiegogo

    Casir is about to launch the H6 4K UST tricolor laser projector through Indiegogo. The new laser projector has a brightness of up to 3000 ANSI lumens and a BT.2020 color gamut coverage of 110%. It is an ultra short focus projector that runs on Android TV.The Casiris H6 4K UST tricolor laser projector is a brighter and more accurate version of the Casiris A6. It also has greater image projection ca...

    2023-09-18
    Çeviriyi gör
  • Swiitol Launches E24 Pro: A Breakthrough in Laser Engraving Technology

    In order to completely change the world of laser engraving, Swiitol has launched the E24 Pro, a 24W integrated laser engraving machine with cutting-edge features and functions. The Swiitol E24 Pro showcases an innovative integrated structure laser engraving machine made of durable aluminum alloy. It is worth noting that the device can be used out of the box without installation, providing users wi...

    2023-11-23
    Çeviriyi gör
  • High sensitivity visualization of ultrafast carrier diffusion using a wide field holographic microscope

    A sketch of the imaging and holographic parts of a transient holographic microscope, including a pulse sequence, to illustrate the signal modulation method. By imaging the pinhole array at the sample position, a diffraction limited excitation spot array can be created, allowing for the simultaneous collection of transient data around 100 excitation spots.Femtosecond transient microscopy is an impo...

    2023-12-25
    Çeviriyi gör
  • Fabrinet Laser Business Revenue Surges

    Recently, Fabrinet released its financial report for the three months ended December 27, 2024, showing that its sales and revenue exceeded expectations. During the reporting period, the company achieved sales of $834 million, a year-on-year increase of 17%. Net income increased by 25% during the same period, reaching $86.6 million.Although the growth in performance is still dominated by the optica...

    02-07
    Çeviriyi gör
  • Redefining the Future of Sensing: In depth Study of Novel Plasma Waveguide Structures

    Imagine in such a world, the detection of trace substances is not only fast, but also incredibly accurate, indicating a new era of technological progress in health, safety, and environmental monitoring. Due to pioneering research on plasma waveguide structures, this vision is becoming increasingly realistic, aimed at enhancing refractive index sensing and spectral filtering. This innovative method...

    2024-03-04
    Çeviriyi gör