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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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center for the advancement of natural discoveries using light emission

Center for the Advancement of Natural Discoveries using Light Emission

Vacuum system for the AREAL linear accelerator

Vacuum Systems

A.Gevorgyan

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

fabrication
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”) .

vacuum assembly
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.

slide7

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

slide8

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.

slide9

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.