Structural design of beam transport system in SGIII facility target area |
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| Affiliation: | 1. Department of Mechanical Engineering, University of Thessaly, Volos 38334, Greece;2. Associação EURATOM/IST, Centro de Fusão Nuclear, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;1. Nuclear Engineering and Technology Programme, Indian Institute of Technology, Kanpur 208016, India;2. Institute for Plasma Research, Gandhinagar 382428, India;3. Innovative Systems Software, Idaho Falls, ID 83406, USA;1. Department of Automation, University of Science and Technology of China, Hefei, Anhui 230027, China;2. Robot Sensors and Human-Machine Interaction Laboratory, Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, China;1. Max-Planck-Institut für Plasmaphysik, Boltzmannstr. 2, D-85748 Garching, Germany;2. Wigner Research Centre for Physics, Hungarian Academy of Sciences, Konkoly-Thege Miklós 29–33, H-1121 Budapest, Hungary;1. Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, Tamil Nadu, India;2. Institute for Plasma Research, Bhat, Gandhinagar, Gujarat, India;1. SSC RF TRINITI Troitsk, Moscow 142 190, Russia;2. JSC “Red Star”, Elektrolitnyj pr. 1A, Moscow 113 230, Russia;3. NRNU MEPhI, Kashirskoye sh. 31, Moscow 115409, Russia |
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| Abstract: | Beam transport system in ShenGuangIII (SGIII) facility target area brings 48 laser beams from main laser output to final optics assemblies (FOAs). This paper will present a summary of structural design of SGIII target area beam transport system, which include 276 transport mirrors and nearly 3000 m beam enclosures. The key performance of the beam transport system structural design includes stability, accuracy and cleanliness. To ensure the vibrational stability requirement, the beam transport system is located on stable platforms comprised of switchyard steel space frame and experimental area steel reinforced concrete building. The high fundamental frequency of the transport mirror system and vibrational isolation from thin tubes are designed to decrease the vibration response of the mirrors. An analytical method is proposed to evaluate the structural design on the drifting error of each laser beam obtained by accounting the dynamic responses of each optical elements of laser beam. The adjusting and fast replacement online requirements are satisfied by the structural design of line replaceable units (LRUs), the adjustable kinematic mounts, and the low-stress clamping of mirror mounts. The cleanliness is established in the process of designing, fabrication, and operation simultaneously. Testing results of the beam transport system that has been installed indicate that the structural design satisfies the performance requirements of the facility. |
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| Keywords: | SGIII Beam transport system Stability Accuracy Cleanliness |
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