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TY - CPAPER AU - Rozario, C. AU - Karande, J.N. AU - Nanal, V. AU - Pal, S. AU - Pillay, R.G. TI - A Novel Method of Beam Scanning Over a Large Sample Arear at PLF, Mumbai J2 - Proc. of Heavy Ion Accelerator Technology Conference (HIAT2015), Yokohama, Japan, 7-11 September 2015 AB - Many applications require uniform irradiation with heavy ion beams and special electric/magnetic devices are employed to scan the beam over the desired target area. We report a novel method of beam scanning using a magnetic steerer in the beam line. Indigenously developed magnetic steerers, comprising a pair of coils with sine-cosine winding, are installed in beam lines at PLF (Mumbai) for correcting the X-Y position of beam. This steerer is adapted to work as a scanner by employing a microcontroller and an interface unit for constant current bipolar power supply. A triangular waveform is applied to control the excitation current for scanning the beam simultaneously in both horizontal (X) and vertical (Y) planes. A programme generates a raster pattern governed by a pre-settable number of X sweeps for each Y sweep. The dwell time at each of X-Y position was adjusted considering the time constant arising due to the inductance of the steerer. Multiple raster scans were used to produce uniform irradiation over the sample. The scanner has been successfully employed for uniform irradiation of GaAs substrate for photoconductive THz applications using 12C beam. PB - JACoW CY - Geneva, Switzerland SP - 39 EP - 41 KW - scattering KW - controls KW - power-supply KW - target KW - linac DA - 2016/02 PY - 2016 SN - 978-3-95450-131-1 DO - 10.18429/JACoW-HIAT2015-MOPA03 UR - http://accelconf.web.cern.ch/AccelConf/HIAT2015/papers/mopa03.pdf ER -