AVS 61st International Symposium & Exhibition
    Vacuum Technology Wednesday Sessions
       Session VT-WeM

Paper VT-WeM4
APS-Upgrade Storage Ring Vacuum System Conceptual Design

Wednesday, November 12, 2014, 9:00 am, Room 303

Session: Accelerator and Large Vacuum Systems I
Presenter: Herman Cease, Argonne National Laboratory
Authors: H. Cease, Argonne National Laboratory
B. Stillwell, Argonne National Laboratory
B. Brajuskovic, Argonne National Laboratory
J. Nudell, Argonne National Laboratory
J. Carter, Argonne National Laboratory
Correspondent: Click to Email
A conceptual design is being developed for a storage ring vacuum system at the Advanced Photon Source (APS) which is compatible with a seven-bend achromat lattice under consideration by the APS Upgrade (APS-U) project. The required proximity of the magnet poles to the beam, quantity and stability of beam position monitors, synchrotron radiation loading, beam physics considerations, and installation duration place a challenging set of constraints on the vacuum system design. These requirements can be satisfied with a hybrid system which combines NEG‐coated copper chambers with conventional extruded aluminum chambers housing mechanically‐mounted NEG strips and discrete absorbers. The hybrid design, expected outgassing and thermal loads, and preliminary vacuum pressure analysis is described.