Simulation of photon intensity distributions to facilitate the design of beamlines at accelerator-based IR/THz sources |
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| Affiliation: | 1. Karlsruhe Institute of Technology, Institute for Photon Science and Synchrotron Radiation, P.O. Box 3640, D-76021 Karlsruhe, Germany;2. Karlsruhe Institute of Technology, ANKA Synchrotron Radiation Facility, P.O. Box 3640, D-76021 Karlsruhe, Germany;1. Unidad de Gestión Clínica de Pediatría y Cirugía Pediátrica, Hospital Universitario Virgen de las Nieves-Instituto de Investigación Biosanitaria, Granada, España;2. Servicio de Microbiología, Hospital Universitario La Paz, Madrid, España;3. Servicio de Pediatría, Enfermedades Infecciosas y Patología Tropical, Hospital Universitario La Paz, Madrid, España;1. Centre for Crystallography & Computational Chemistry, CRD, PRIST University, Thanjavur 613403, India;2. Dept. of Physics, M.I.E.T. Engineering College, Trichy 620007, Tamil Nadu, India;3. Dept. of Physics, Annamalai University, Annamalai Nagar 608002, Tamil Nadu, India;4. PG and Research Dept. of Chemistry, Jamal Mohamad College (Autonomous), Trichy 620020, Tamil Nadu, India;1. Material Physics and Technology at Extreme Conditions, Laboratory of Crystallography, University of Bayreuth, D-95440 Bayreuth, Germany;2. Bayerisches Geoinstitut, University of Bayreuth, D-95440 Bayreuth, Germany;3. European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble Cedex, France;4. Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology, P.O. Box 3640, 76021 Karlsruhe, Germany;5. ANKA Synchrotron Radiation Facility, Karlsruhe Institute of Technology, P.O. Box 3640, 76021 Karlsruhe, Germany;6. CNRS, Laboratoire de Géologie de Lyon, ENS de Lyon, UCBL Lyon 1, Université de Lyon, France;7. IBPT, Karlsruhe Institute of Technology, P.O. Box 3640, 76021 Karlsruhe, Germany;1. High Pressure and Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India;2. Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India;1. National Center for Protein Science Shanghai, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China;2. Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China;3. Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015, USA |
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| Abstract: | Simulations with the software Synchrotron Radiation Workshop (SRW) for the ANKA infrared (IR) beamlines IR1 and IR2 have shown, that the far-IR and terahertz (THz) edge radiation can interact with the vacuum chamber walls very close to the electron beam. Unfortunately SRW cannot compute wavefronts at large angles of observation and at a close vicinity to the source. As we need to take into account these perturbations for the further propagation of the radiation through the entire beamline optics to the experimental station, we have started to develop our own code.This code can generate the electric and magnetic field vectors by solving Maxwell equations without approximations and without restrictions to the angles of observation or distance to the source. In particular the latter requires that also the magnetic field vectors have to be calculated, to obtain the corresponding photon intensity distribution for situations where the electron beam intersects the observation plane.Moreover it revealed that it is essential to correct for the Coulomb field prior to calculating the photon intensity in cases where the electron beam intersects the observation plane. Therefore our code is not limited to synchrotrons but can also be used for the development of new kinds of IR/THz radiation facilities. |
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| Keywords: | Infrared Terahertz Beamline Radiation Simulation Coulomb field |
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