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Center for the Advancement of Natural Discoveries using Light Emission. Vacuum system for the AREAL linear accelerator. Vacuum Systems A.Gevorgyan. Table of contents. Design Fabrication Vacuum assembly Control system Test -stand. Design.
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Vacuum system for the AREAL linear accelerator
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:
The design goal of vacuum is an average preasure 10-9mbar.
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”) .
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.
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
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 typecopper 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.
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 flangeUHV.