For the interpretation of the measurements of the fluorescence component of ultra-high energy showers a precise knowledge of the air fluorescence efficiency and its dependence on particle energy and atmospheric parameters is mandatory.

A world-wide campaign of laboratory measurements is being carried out. These international efforts have reached a stage of reliable results.

After a series of successful meetings, starting in Utah in 2002, the 6th Air Fluorescence workshop will be held at the Gran Sasso National Laboratory, Assergi (L'Aquila), February 11-14, 2009.

Workshop Site

Laboratori Nazionali del Gran Sasso, Assergi (L'Aquila) - ITALY.

The laboratory is located near "Campo Imperatore" which is a mountain grassland formed by a high basin shaped plateau located in the Gran Sasso massif. It is the largest plateau of the Apennine ridge. Known as Italy's "Little Tibet", it is located in the natural park known as the "Gran Sasso e Monti della Laga National Park". See info

How to get the workshop site.

Air fluorescence emission:

Air fluorescence emission:

  • absolute fluorescence yield measurements;
  • energy dependence;
  • pressure, temperature, humidity dependence.

Application to shower detection:

  • energy calibration of fluorescence telescopes.