1. H.E.S.S. - MAGIC – CTA meeting Technical aspects of current & future instrumentation Telescope structures Camera designs Photon detectors Mirrors

2. 1) Identification of common physics goals / interests. 2) Definition of a procedure to find out which possible designs of a future observatory could meet the physics goals ? 3) Identification of criteria to evaluate possible designs. 4) Implementation of common working groups and definition of their tasks. 5) Last not least: bring together people who work in the same field, but (still) in different experiments H.E.S.S. - MAGIC – CTA meeting

3. Technical aspects of current & future instrumentation Telescope structures Camera designs Photon detectors Mirrors

4. H.E.S.S. - MAGIC – CTA meeting Telescope Structure

5. H.E.S.S. - MAGIC – CTA meeting Telescope Structure A telescope is a thing …. Holds up to a few hundred mirrors ( 10 – 600 m 2 ) Allows to fix a camera relative to mirrors Can be rotated around two axis … that

6. H.E.S.S. - MAGIC – CTA meeting Telescope Structure ?? ? Complexity of construction Maintainability Mass Production Production at remote location Stability Reproducibility For a scientific infrastructure (observatory) Manpower for operation Manpower for characterization $$$$$ $$$ Lifetime Risk in development

7. H.E.S.S. - MAGIC – CTA meeting Telescope Structure ?? ? Size of the Optical PSF Mast Bending Tracking Stability Pointing accuracy For a scientific infrastructure (observatory)  What is the physics, you build the instrument for ?!?! $$$$$ $$$ OFF-Axis performance Timing properties Slewing speed FoV

8. H.E.S.S. - MAGIC – CTA meeting

9. Cherenkov Camera

10. H.E.S.S. - MAGIC – CTA meeting Cherenkov Camera A Cherenkov Camera is a thing …. … that Measures light intensities Arrival time of light pulses or pulse shape Is SMART, and knows, when to trigger Capable of taking images at high rate

11. H.E.S.S. - MAGIC – CTA meeting Cherenkov Camera ?? ? Complexity of construction Maintainability Mass Production Production at remote location Stability Reproducibility For a scientific infrastructure (observatory) Manpower for operation Manpower for characterization $$$$$ $$$ Lifetime Risk in development