Title :
Vacuum design for a Superconducting Mini-Collider
Author :
Barletta, William A. ; Monteiro, Sergio
Author_Institution :
Lawrence Livermore Nat. Lab., CA, USA
Abstract :
The phi factory (Superconducting Mini-Collider or SMC) proposed for construction at UCLA is a single storage ring with circulating currents of 2 A each of electrons and positrons. The small circumference exacerbates the difficulties of handling the gas load due to photodesorption from the chamber walls. The authors analyze the vacuum system for the phi factory to specify design choices. It is concluded that the SMC vacuum system, while more challenging than that of existing storage rings, is within the bounds of sound engineering practices. The antechamber moves the gas load away from the beam, thereby lowering the required distributed pumping. To minimize photodesorption, stainless steel backed by a Cu cooling bar has been selected for the chamber material. This design allows for chamber commissioning in approximately=300 hours of ring operation.<>
Keywords :
particle accelerator accessories; storage rings; vacuum apparatus; Cu cooling bar; SMC; Superconducting Mini-Collider; antechamber; chamber commissioning; chamber walls; circulating currents; distributed pumping; electrons; gas load; phi factory; photodesorption; positrons; storage ring; vacuum system; Acoustical engineering; Electrons; Laser excitation; Positrons; Production facilities; Sliding mode control; Steel; Storage rings; Structural beams; Vacuum systems;
Conference_Titel :
Particle Accelerator Conference, 1991. Accelerator Science and Technology., Conference Record of the 1991 IEEE
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-0135-8
DOI :
10.1109/PAC.1991.164949
