No abstract available

[en] Construction and tests of new gammagraphic devices, 3 years field experience, security and technical reliability, remote control, considerable operator dose-rate reduction. (orig.)

[en] An electron-positron double storage ring for 2x6 A stored beam at 1,8 BeV and 2x0.9 A at 3 BeV has been built and started operating at DESY, the German Electron Synchrotron. The unique double ring structure of 2x288 m length with 2 experimental crossover points allows also particle research with stored electron-electron beams or - after some proposed changes - with electron-proton beams. The main ''vacuum problem'' of high current electron-positron storage rings is the high desorption rate by synchrotron radiation. With full stored beams a pressure in the low 10^-8 Torr scale it is wanted to get a beam life time of a few hours due to ''Bremsstrahlung''. The system has been built as a bakeable UHV-system in order to reach a base pressure of 1.10^-9 Torr or lower without beam. (auth.)

[en] A test system for district heating pipes (laid above ground or in the ground or in the offshore field) is introduced, a so-called 'intelligent' test 'pig' which, like in a pneumatic tube, floats through the pipe with the medium during operation and finds out any corrosion damage. The equipment works on the principle of ultrasonic wall thickness testing in immersed technique, and is equipped with a large number of test heads in order to scan the pipe surface completely in one run-through. The data processing in the pig with the aid of microprocessors and the type of data collection in mass memories is briefly described. The test results are clearly shown by coloured graphics, which makes efficient assessment and evaluation of the faults possible. The ability of the system to supply information (data collection, data storage, assessment and evaluation) is demonstrated by a series of typical faults, which were found worldwide in oil and gas pipes. (orig./HP)