The Max-Planck-Institut für Plasmaphysik (IPP) is part of the "Forschungszentrum Garching" situated approximately 3 km north from the center of Garching.
Munich airport is approximately 17 km north-east of Garching. The fastest and easiest way of reaching IPP is by taxi. The typical fare to Garching town center is around 30 €. Munich taxis (beige color) are available from taxi stands at both airport terminals.
Unfortunately there is no direct rail link between the airport and IPP. The recommended route is the S8 (every 20 min) to Ismaning, then the 230 regional bus to Garching. Note that the 230 bus is replaced on weekends by a group taxi-van to Garching running once an hour. Normal taxis are also always available at the Ismaning station around the clock (approx. 17 - 20 €).
The IPP can be reached from the Garching town center by subway (U6, last stop "Forschungszentrum") in approx. 5 min. This subway line is also a fast connection (approx. 25 min) to the center of Munich.