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Measuring Radiation Damage from Heavy Energetic Ions in Aluminum
An intense beam of 122 MeV/u (9.3 GeV) 76Ge ions was stopped in aluminum samples at the Coupled Cyclotron Facility at NSCL, MSU. Attempts were made at ORNL to measure changes in material properties by measuring changes in electrical resistivity and microhardness, and by transmission electron microscopy characterization, for defect density caused by radiation damage, as a function of depth and integrated ion flux. These measurements are relevant for estimating damage to components at a rare isotope beam facility
Fermilab-Conf-11-127-APC ADVANCED BENT CRYSTAL COLLIMATION STUDIES AT THE TEVATRON (T-980) Advanced Bent Crystal Collimation Studies at the Tevatron (T-980)*
Abstract The T-980 bent crystal collimation experiment at the Tevatron Abstract The T-980 bent crystal collimation experiment at the Tevatron [1, 2] has recently acquired substantial enhancements. First, two new crystals -a 16-strip one manufactured and characterized by the INFN Ferrara group and a quasi-mosaic crystal manufactured and characterized by the PNPI group. Second, a two plane telescope with 3 high-resolution pixel detectors per plane along with corresponding mechanics, electronics, control and software has been manufactured, tested and installed in the E0 crystal region. The purpose of the pixel telescope is to measure and image channeled (CH), volume-reflected (VR) and multiple volume-reflected (MVR) beam profiles produced by bent crystals. Third, an ORIGIN-based system has been developed for thorough analysis of experimental and simulation data. Results of analysis are presented for different types of crystals used from 2005 to present for channeling and volume reflection including pioneering tests of two-plane crystal collimation at the collider, all in comparison with detailed simulations