That makes DESY not only a magnet for more than 3000 guest researchers from over 40 countries every year, but also a coveted partner for national    and international cooperation.

   For more than 20 years groups from Yerevan Physics Institute actively participated in construction and operation of the HERMES and H1experiments on the HERA accelerator.Their studies have concentrated on the spin      structure of the nucleon and hadronization phenomena including nuclear attenuation effects, having as very ambitious goal revealingthe three-dimensional picture of the nucleon structure –one of the most enigmatic problems of    the structure of matter.

  After closing HERA accelerator in 2007 the Yerevan groups have been extensively involved in the ongoing data analysis, being responsible for many important publications. On the longer term(after 2014) the Yerevan group    will continue the local activities at YerPhI with the analysis of the HERMES data providing further new physical results and papers.

  In 2010 Armenian physicists took part in the last high-energy physics experiment at DESY named OLYMPUS, which has completed at the end of 2012. Now physicists are concentrated on the analysis of the electric and    magnetic features of the nucleon and hope to obtain fundamental results in the near future.

 Some of the key physical equipment of the finished OLYMPUS experiment was donated to the Yerevan Physics Institute and will be used for new accelerator and cosmic ray experiments in Armenia. DESY took care of  packing and sending expenses; 2 tons of particle detectors and electronics expected to arrive to Armenia in January 2014.

 HERA physicists can now continue research using the computer center of Yerevan Physics Institute (A.Alikhanyan National Lab) which has in recent years been substantially modernized significantly enlarging the CPU power  and data storage, to host Terabyte data archives from HERA and other large particle physics and astrophysics experiments.

 Now DESY transforms from a particle physics center tothe world’s most intense X-ray light producer, opening completely new windows onto the universe.The world’s sharpest X-ray beam shines now at DESY. At the X-ray  light source PETRA III, scientists generated a beam with a diameter of barely 5 nanometres – this is ten thousand times thinner than a human hair.

 Unfortunately, Armenian users of the future CANDLE accelerator do not participate in the new DESY activities, although it would be the best training on worlds largest machine. It would not only prepare the scientific  community for using intense light beams in Armenia, but also help to continue the long-standing, fruitful collaboration of Armenian and German scientists.

 

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The leader of the Yerevan group at DESY Akopov Norair (left) and

the deputy spokesman of the DESY Olympus group, Uwe Schneekloth,

are examining the OLYMPUS experiment beam monitoring system at DORIS accelerator rings.