The DAΦNE Main Ring Vacuum System

Author

Chimenti, V. ; Clozza, A. ; Hsieh, H. ; Raffone, G. ; Vaccarezza, C.

Author_Institution

Istituto Nazionale di Fisica Nucl., Rome, Italy

fYear

1993

fDate

17-20 May 1993

Firstpage

3906

Abstract

The DAΦNE Main Ring Vacuum System is designed for an mean operating pressure of 1 nTorr with a circulating current of about 5 A/beam. Finite elements calculations have been carried out to check the maximum possible deformation for the bending quadrant vacuum chamber that will be made of Al 5083-11321. Water cooled copper absorbers are employed to cope with the Synchrotron Radiation, (SR), produced in the wigglers and dipoles. The total gas load due to SR is Q≈2.6×10 ^-5 Torr 1/s per arc for CO, with a photodesorption rate η≈1×10^-6 molec/ph, (after ≈40 Ahr of commissioning), as measured at NSLS-BNL. Nine sputter ion pumps and nine titanium sublimation pumps are located in each arc to provide, respectively, the 15% and the 85% of the required pumping speed

Keywords

finite element analysis; ion pumps; storage rings; vacuum apparatus; 1*10^-9 torr; Al; Cu; DAΦNE; DAONE; Main Ring Vacuum System; bending quadrant vacuum chamber; dipoles; photodesorption; sputter ion pumps; sublimation pumps; synchrotron radiation; wigglers; Copper; Finite element methods; Pumps; Stress; Strontium; Structural beams; Synchrotron radiation; Titanium; Undulators; Vacuum systems;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1993., Proceedings of the 1993

Conference_Location

Washington, DC

Print_ISBN

0-7803-1203-1

Type

conf

DOI

10.1109/PAC.1993.309841

Filename

309841