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Center for the Advancement of Natural Discoveries using Light Emission

Design, fabrication, and assembly of an ultra-high vacuum system for the AREAL linear accelerator. The system includes oil-less pumps, low outgassing rate surface treatment, stainless steel construction, and CF flange connections. Control system includes gauges and valves for pressure measurement and control. Test-stand ensures proper functionality.

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Center for the Advancement of Natural Discoveries using Light Emission

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  1. Center for the Advancement of Natural Discoveries using Light Emission Vacuum system for the AREAL linear accelerator Vacuum Systems A.Gevorgyan

  2. Table of contents • Design • Fabrication • Vacuum assembly • Control system • Test -stand

  3. Design Vacuum system in AREAL linear accelerator will be designed as an ultra-high vacuum system ,thus is means that the selected materials,device and components must satisfy this criteria: • oil-less pumps • surface treatment low outgasing rate • construction solutions • materials The design goal of vacuum is an average preasure 10-9mbar.

  4. Accelerator 3D model

  5. Fabrication Vacuum chamber will be fabricated from AISI 316-L steinless steel. All chosen devices and hardwares,will be from steinless steel 316-L or 304, i.e (valves,flanges,belows,bolts). Vacuum chamber sectors will be joined togather with CF flanges(2”) .

  6. Vacuum assembly Vacuum pump down will be done using portable TPS turbopumping system with integrated scroll pump,that can be wheeled to any area.Ultimate pressure 10-9 mbar.

  7. Each dipole magnet chamber will have a port for Ion pump and approximately the straight sections too. Ultimate pressure for this pumps are 10-11mbar.They are monitored and operate via dual controllers. Operating voltage 7kV. pumping speed 55 and 65 litr/sec

  8. Gate valves will be used to divided the main sectors,one of them for the electron gun protection will be fast closing(0.5-0.7)msec.Operating air pressure for valves are 5-8 atm.Open and close time 1.5-2 sec. Angle valves will be used for changing the pumping direction . The all valves are CF flange typecopper seals UHV. The operating of vacuum valves will be done with local control system .There will be total 2 gates and 1 angle valve for the system.

  9. Each sector of vacuum system will have one measuring array ,including Pening and Bayard-Alpert gauge allowing preasure measurements from atmospheric pressure down to 10-10 mbar.The all gauges monitored and controlled via multigauge controller. B-A gauge installed to the system with CF flangeUHV.

  10. Control system

  11. Test –stand

  12. THANK YOU FOR ATTENTION

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