Transcript Vacuum System

Center for the Advancement of
Natural Discoveries using Light
Emission
Vacuum system for the AREAL linear
accelerator
Vacuum Systems
A.Gevorgyan
Table of contents
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Design
Fabrication
Vacuum assembly
Control system
Test -stand
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
10-9 mbar.
Accelerator 3D model
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 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.
Base Pressure
1X10-9mbar(*)(CFF Flanges) – 1X10-8mbar (ISO Flanges)
Pumpdown Time (14lt volume)
80sec (100mbar); 110sec (10mbar); 155sec (10-4mbar);
400sec (10-5mbar)
Start-up Time
15sec
Operating Position
Any
Operating Ambient Temperature
5oC to 35oC
Input Voltage and Frequency
115Vac 60Hz or 220-240Vac 50/60Hz
Maximum Input Power
260VA
Bakeout Temperature
120oC at inlet (CFF Flanges) – 80oC at inlet (KF/ISO Flanges)
Communication
RS232 – Analogical I/O
Weight
16.7Kg (36.8lbs)
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(0.50.7)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.
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.
Control system
Test –stand
THANK YOU FOR
ATTENTION