AVS 60th International Symposium and Exhibition
    Vacuum Technology Wednesday Sessions
       Session VT-WeM

Paper VT-WeM11
Commissioning of NSLS-II Vacuum Systems

Wednesday, October 30, 2013, 11:20 am, Room 202 C

Session: Pumps, Accelerators and Large Vacuum Systems
Presenter: H.-C. Hseuh, Brookhaven National Laboratory
Authors: H.-C. Hseuh, Brookhaven National Laboratory
A. Anderson, Brookhaven National Laboratory
W. DeBoer, Brookhaven National Laboratory
C. Hetzel, Brookhaven National Laboratory
S. DiStefano, Brookhaven National Laboratory
S. Leng, Brookhaven National Laboratory
K. Wislon, Brookhaven National Laboratory
H. Xu, Brookhaven National Laboratory
D. Zigrosser, Brookhaven National Laboratory
Correspondent: Click to Email
The National Synchrotron Light Source II is a synchrotron radiation facility designed with ultra-high-flux and -brightness. It consists of a 200-MeV Linac, a 3-GeV Booster and a 3-GeV, 792-meter circumference storage ring. The Booster vacuum system is made of thin-wall stainless steel chambers and is pumped with ion pumps. The Linac and Booster vacuum systems are completed and have reached ultrahigh vacuum. The storage ring vacuum chambers are mainly made of extruded aluminium with ante-chamber. The synchrotron radiation from the bending magnets in the storage ring is intercepted at discrete photon absorbers made of GlidCop. NEG strips in the ante-chamber provide the distributed pumping, while lumped ion pumps and titanium sublimation pumps at photon absorbers remove the desorbed gas. The 250 long aluminium chambers were manufactured by extrusion, bending, machining and welding. They are assembled with pumps, photon absorbers and diagnostic components, integrated into magnet girders and installed in the storage ring tunnel. All 30 DBA cells with 210 chambers have been connected with RF bellows, pumped down, in-situ baked and have reached 10-11 mbar. The narrow gap insertion device chambers are to be coated with NEG, and are currently under fabrication. This paper describes conditioning, installation, integrated testing and commissioning of the NSLS-II vacuum systems. Experience from the large scale production, testing and lesson learned will be summarized.

*Work performed under the auspices of U.S. Department of Energy, under contract DE-AC02-98CH10886.