MOD03
University of Huddersfield, Huddersfield, United Kingdom
PSI, Villigen PSI, Switzerland
IIAA, Huddersfield, United Kingdom
PSI, Villigen PSI, Switzerland
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MOD03 |
A Precise 3D Beam Dynamics Model of the PSI Injector II | |
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| A precise beam dynamics model of the PSI Injector II operating at 2.2 mA is presented, including 3D space charge, and the collimation system. A particle distribution with an intensity of 9.5 mA (DC) is injected into the central region, shaped by a sophisticated collimator system. This defines the initial condition for the subsequent formation of a round stationary bunch. The intensity limits are estimated based on this model, additionally supported by an idealised collimator model and measurements. The production configuration current scales to the power of four with the beam size setting the limit to approximately 3 mA. Further analysis of an upgraded configuration (adding two new cavities) suggests that intensities of 5 mA could be produced with an adjusted collimation scheme. The precise beam dynamics model is based on the OPAL (Object Oriented Parallel Accelerator Library) simulation code, a tool for charged-particle optics calculations in large accelerator structures and beam lines including 3D space charge. | ||
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Slides MOD03 [3.529 MB] | |
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| THP16 | Beam Based Calibration Measurements at the PSI Cyclotron Facility | 342 |
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| The PSI cyclotron facility is in operation since four decades. Even though the design details of the original machine are well documented, doubts may remain, if all changes of the most relevant devices during 40 years of operation are known with certainty. Furthermore some measurements like magnetic field mappings and central region alignment measurements can be done only during the construction and assembly phase either for mechanical reasons, due to limited shutdown or maintenance periods or because of the activation of components. Therefore it is important to develop methods that allow to check important parameters during beam operation without a disassembling of components. An effective method to test the consistency of the data is based on the combination of beam tracking simulations and beam based measurements. We present some beam based alignment and calibration measurements concerning collimator positions, Dee voltage distributions, turn patterns, beam energy and trim coil field profiles using measurements of radial probes, phase pickups and profile monitors. | ||
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