Home Facility Spotlight Facility Spotlight | BESSY II @ HZB

Facility Spotlight | BESSY II @ HZB

17th October 2019

BESSY II @ HZB

As a multi-disciplinary multi-user facility, the research portfolio at BESSY II includes physics (e.g., quantum physics in solids, superconductivity, magnetism, topological insulators, clusters, and disordered systems), chemistry (e.g., catalysis and artificial photosynthesis, real-time investigations of charge transfer), energy research (e.g., materials for energy conversion and storage, solar fuels, and battery research), biology (e.g., dental treatment, cells, and bacteria), medical and pharmaceutical research (e.g., bio and bio-mimetic materials, function mechanisms of drugs), materials testing, and cultural heritage investigations. Research at BESSY II addresses a set of grand challenges increasingly important for and commonly faced by most developed societies.

Highlights in conjunction with the celebration of 20 years of light at BESSY II are summarized on a special page Highlights 20 Years, while recent and current scientific highlights are presented in the HZB Newsroom HZB Highlights. Just find a few right here:

Spintronic

The cones represents the magnetization of the nanoparticles. In the absence of electric field (strain-free state) the size and separation between particles leads to a random orientation of their magnetization, known as superparamagnetism. © HZB

Topological Insulators

The Bismut doping is enhanced from 0% (left) to 2.2% (right). Measurements at BESSY II show that this leads to increased bandgaps. © HZB

Solar-to-Hydrogen

PCN nanolayers under sunlight can split water. © Nannan Meng /Tianjin University

Proton Transfer

The experimental data show, how a light pulse dissociates a hydrogen nucleus from the nitrogen atom without destroying important bonds within the molecule. © Th. Splettstösser/HZB

Boost the efficiency

Principle of a silicon singlet fission solar cell with incorporated organic crystalls © M. Künsting/HZB

 

Plastic scissors

The enzyme MHETase is a huge and complex molecule. MHET-molecules from PET plastic dock at the active site inside the MHETase and are broken down into their basic building blocks. © M. Künsting/HZB

Developments

As a multi-disciplinary multi-user facility, the research portfolio at BESSY II includes physics (e.g., quantum physics in solids, superconductivity, magnetism, topological insulators, clusters, and disordered systems), chemistry (e.g., catalysis and artificial photosynthesis, real-time investigations of charge transfer), energy research (e.g., materials for energy conversion and storage, solar fuels, and battery research), biology (e.g., dental treatment, cells, and bacteria), medical and pharmaceutical research (e.g., bio and bio-mimetic materials, function mechanisms of drugs), materials testing, and cultural heritage investigations. Research at BESSY II addresses a set of grand challenges increasingly important for and commonly faced by most developed societies.

Future prospects

HZB is currently identifying the user-driven requirements for a future light source in the soft to tender X‐ray range (“BESSY III”). Highest stability enabling nanometer spatially resolved experiments with paramount spectral resolution will be the key capability of this facility. The integration of source points for metrological applications, time resolved experiment and other flexible operation modes in a diffraction limited storage ring is currently evaluated.

Always in contact with our users

What are the requirements of the scientific communities? What are the future challenges? BESSY II@HZB is conducting Foresight Workshops in order to systematically involve all present and potential users from universities, research institutes and industry the BESSY III project. Regular Discussion Rounds, User Meetings, a User Committee, Newsletters, Social Media, and a variety of outreach activities are further – not exhaustive – examples of our user involvement.

Facility Description

The BESSY II synchrotron radiation source at Helmholtz-Zentrum Berlin (HZB) is a third-generation 1.7 GeV storage ring dedicated to the photon energy range from VUV to soft and tender X-rays. The source and the instrument suite are very versatile and provide photons at a high average brilliance. BESSY II features sophisticated fill patterns serving both time-resolved and photon hungry experiments at the same time. This capability, together with purpose-made insertion devices, allows for energy, spatial, temporal, and polarization control of the photon beam.
BESSY II is the European radiation standard and is used for metrology purposes by Germany’s National Metrology Institute (PTB). The PTB is also operating the Metrology Light Source and is a major partner for industrial use of synchrotron light.
HZB’s own research provides the basis for strong scientific support for BESSY II users, ranging from special accelerator operation schemes over instrument and experiment design, the choice of sample environments and the specific instrumentation, to the evaluation and interpretation of results. In addition, lab infrastructure for energy materials research at HZB are available to BESSY II users for preparation of samples and additional characterization experiments.

 

BESSY II Facts & Figures

  • Focus on soft X-rays, range THz to hard X-rays
  • Flexible pulse & time structure, pulse length 1-20ps (slicing beamline ~ 100fs)
  • Beamlines: 46 in operation, 37 in user operation ( 27 of these in use simultaneously)
  • User from 32 countries (60% Germany, 30% EU, 10% World)

On average per year

  • More than 1200 proposals
  • About 800 beamtime campaigns
  • More than 500 (verified) publications
  • More than 3000 user visits

Contact