Wannsee site: Lise-Meitner-Campus, Hahn-Meitner-Platz 1 (ehem. Glienicker Str. 100), 14109 Berlin

For security reasons, the following regulations apply to visits to the HZB: Persons aged 16 and over must present their valid original identity card (alternatively passport). Access for persons under the age of 16 is only permitted when accompanied by an adult.

Here you will find information and answers to frequently asked questions on the safety of the research reactor BER II.

Guided Tours

Visitors are invited to get a personal impression and discuss with scientists. Tickets for all guided tours will be issued at the ticket tent.

  • Guided tour: Experimental stations at the research reactor BER II (18:20, 19:40, 21:00 and 22:20 o'clock, duration 45 min., requirements: minimum age 14 years, valid original identity card (alternative (children's) passport), meeting point in the cloakroom tent)
    The research reactor BER II produces neutrons. We can even use them to examine metals. The facility will be shut down at the end of 2019 - take the last opportunity to visit!

  • A watch under the scanning electron microscope (19:15, duration 25 min., meeting point at the ticket tent, limited places)
    Dive into the nanoworld with us! We take a look at a mechanical watch magnified ten thousand times - and show why details are important in material analysis.

  • Optimizing thin-film solar cells with the scanning electron microscope (20:30, duration 30 min., meeting point at the ticket tent, limited places)
    With the scanning electron microscope, we can examine the structure and atomic composition of extremely thin layers that make up thin-film solar cells, for example. Discover fascinating images from the nanoworld during this laboratory tour.

  • Ion microscope Zeiss Crossbeam (18:00, duration 25 min., meeting point at the ticket tent, limited places)
    This microscope works with gallium ions. They are so sharply focused that we can even "carve" materials with this beam.

  • Transmission electron microscope Zeiss LIBRA 200 (21:00, duration 25 min., meeting point at the ticket tent, limited places)
    Who wants to bother with construction errors? Neither house builders nor our researchers when they develop new materials. With this microscope, they can see how atoms arrange themselves and discover building defects on an atomic scale.

  • Atomic Layer Deposition “ALD” lab (18:00, 20:00 22:00, duration 30 min., meeting point at the ticket tent, limited places)
    The chips in our smartphones and computers consist of extremely thin layers of different materials. Some layers are only a few atoms thick! We will show you our atomic layer deposition system, with which we can deposit such layers.

  • Producing extremely thin material layers (19:00, 21:00, duration 30 min., meeting point at the ticket tent, limited places)
    We will show you one of the most precise ways of creating extremely thin layers of material. The atomic layers are formed by evaporating materials in an extremely high vacuum, which is more than ten orders lower than normal atmospheric pressure.

  • Brilliant sunlight (20:45, duration 45 min., meeting point at the ticket tent, limited places)
    Every light source is different. Examine light spectra from halogen lamps, neon tubes, sun simulators and LEDs - and compare them to sunlight. We show you how to use the sun's light to produce hydrogen. Hydrogen can be used as a universal energy storage material.

  • Tracking crystal structures (20:00, duration 30 min, meeting point at the ticket tent, limited places, requirements: no pregnant women; children younger than 16 years only with adult accompanying person)
    Crystals are often colorful and have beautiful shapes. To understand their properties, we need to study their structure. On a tour of the X-ray laboratory, we show how we discover the crystal structures.

Program for Kids

  • Child care with make-up and handicrafts (until 10 pm)
    For children from 3 years old we offer childcare. A nice team has prepared plenty of fun from make-up to handicrafts.

Science Road

  • Frozen Science - Cool Corner We show you spectacular experiments with liquid nitrogen on magnetism and superconductivity, which are fun not only for us. Just drop by to try.

  • Solar cells of the next generation Solar cells are versatile - on the roof, in facades and in solar power plants. Solar cells, which consist of thin layers, have many advantages over the widely used silicon solar cells.  We explain the reasons for this, illustrate the production and application, and introduce HZBs Consulting Office for building-integrated Photovoltaics.

  • Powered by wind, sun and hydrogen: Which model car will win the race? We show how solar energy can be used to produce hydrogen. The gas is a good fuel for vehicles and can generate electricity in fuel cells. Take part in our car race! Model cars charged with different renewable energies will compete against each other.

  • Challenge: Make your own photoelectrode and set a record performance! Produce your own photoelectrodes based on titanium oxide and iron oxide (rust). What is the best composition (e.g. iron-titanium ratio)? Measure the photocurrent of your own photoelectrode. Whoever has made the most efficient photoelectrode wins a prize.

  •  Eye tumor therapy with protons More than 3400 patients have been treated jointly by the Charité Berlin and the HZB using protons from the particle accelerator. In the info tent we show the procedure and the advantages of proton therapy.

  •  Environmentally friendly and more efficient batteries We are investigating more powerful, environmentally friendly and cost-effective alternatives to today's lithium-ion batteries. Using neutron and X-ray radiation, we can investigate and develop new storage systems.

  •  Chemistry on the computer? Chemical experiments without laboratory, lab coats and glass vessels? That's possible! A computer is all it takes to calculate whether two substances together produce a desired product or what color a crystal has or what happens to water molecules in the microwave.

  •  Cooking with solar power (until 10 pm) You can even cook with the energy of the sun. If there will be enough sunshine we want to cook potatoes with the solar cooker. If it is cloudy, you can at least marvel at it and explain how it works.

  •  The electron storage ring BESSY II in Adlershof In Adlershof the HZB operates the electron storage ring BESSY II, with which we generate a special light. Teams from all over the world come to us to study their samples. We show how BESSY II works and present new accelerator technologies. In an acoustic experiment you can experience the phenomenon of accelerator physics.

Food and music

Our cafeteria serves a selected range of food and drinks. Our DJ Carsten provides music and atmosphere.