BEAM LOSS MONITORING AND CONTROL FOR HIGH INTENSITY BEAMS AT THE AGOR-FACILITY

The experiments at the AGOR facility require intense heavy ion beams. Typical examples are 1013 pps of 20Ne6+ at 23.3 MeV/A and ≥1012 pps 206Pb27+ at 8.5 MeV/A. To prevent damage to components by the beam (power density up to 1 kW/mm3 in unfavourable cases) a modular beam loss monitoring and control system has been developed for the cyclotron and high energy beam lines. The architecture of the system is described and the considerations for the major design choices discussed. The system uses the CAN-bus for communication and verification of system integrity. The injected beam is chopped at 1 kHz with a variable duty factor between 5 and 90 %. The beam intensity at injection and a number of locations in the high energy beam line is measured by inductive pick-ups. Furthermore, localized beam losses on slits and diaphragms are directly measured. When beam loss in any section exceeds the predefined maximum value, the duty factor of the beam is automatically reduced.IMP;Chinese Academy of Science

The new read-out electronics for the BaF₂-calorimeter TAPS

A highly compact and fast VME based read-out board for BaF2 scintillation detectors has been designed, developed and finally tested in an in-beam experiment. Adapted to the excellent properties of BaF2, the unit allows to digitize time, energy and pulse-shape information of 4 detector channels in parallel. The board is piggy-back plugged onto a motherboard containing a high-speed 12-bit ADC and the VME Interface, commercially available in the customized version CAEN V874A. Both together combine to one single VME slot. A first measurement of the photon response of a TAPS sub-array with energy marked photons up to 2.6 GeV has documented the full functionality and excellent performance

The new readout electronics for the BaF2-calorimeter TAPS

A highly compact and fast VME based readout board for BaF2 scintillation detectors has been designed, developed, and finally tested in an in-beam experiment. Adapted to the excellent properties of BaF2, the unit allows to digitize time, energy, and pulse-shape information of four detector channels in parallel. The board is piggy-back plugged onto a motherboard containing a high-speed 12-bit ADC and the VME interface, commercially available in the customized version CAEN V874 A. Both combine to one single VME slot. A first measurement of the photon response of a TAPS subarray with energy tagged photons up to 2.6 GeV documents the full functionality and excellent performance

The Pierre Auger Cosmic Ray Observatory

See paper for full list of authors – Paper submitted to NIM AInternational audienceThe Pierre Auger Observatory, located on a vast, high plain in western Argentina, is the world's largest cosmic ray observatory. The objectives of the Observatory are to probe the origin and characteristics of cosmic rays above $10^{17}$ eV and to study the interactions of these, the most energetic particles observed in nature. The Auger design features an array of 1660 water-Cherenkov particle detector stations spread over 3000 km$^2$ overlooked by 24 air fluorescence telescopes. In addition, three high elevation fluorescence telescopes overlook a 23.5 km$^2$, 61 detector infill array. The Observatory has been in successful operation since completion in 2008 and has recorded data from an exposure exceeding 40,000 km$^2$ sr yr. This paper describes the design and performance of the detectors, related subsystems and infrastructure that make up the Auger Observatory

The Pierre Auger Cosmic Ray Observatory

The Pierre Auger Observatory, located on a vast, high plain in western Argentina, is the world's largest cosmic ray observatory. The objectives of the Observatory are to probe the origin and characteristics of cosmic rays above 1017 eV and to study the interactions of these, the most energetic particles observed in nature. The Auger design features an array of 1660 water Cherenkov particle detector stations spread over 3000 km2 overlooked by 24 air fluorescence telescopes. In addition, three high elevation fluorescence telescopes overlook a 23.5 km2, 61-detector infilled array with 750 m spacing. The Observatory has been in successful operation since completion in 2008 and has recorded data from an exposure exceeding 40,000 km2 sr yr. This paper describes the design and performance of the detectors, related subsystems and infrastructure that make up the Observatory