• H.-C. Hseuh, L. Doom, M.J. Ferreira, C. Longo, V. Ravindranath, P. Settepani, S. Sharma, K. Wilson
  BNL, Upton, Long Island, New York

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

National Synchrotron Light Source II is a 3-GeV, 792-meter circumference, high-flux and high-brightness synchrotron radiation facility being constructed at Brookhaven National Laboratory. The storage ring vacuum chambers are made of extruded aluminium and the bending magnet photons are intercepted at discrete photon absorbers. The design of the storage ring vacuum system will be presented, with emphasis on vacuum chamber design and fabrication, pumping arrangements, photon beam tracking and absorber positioning, and interface with other accelerator systems. The evaluation of the aluminium chamber prototypes and RF shielded bellows will also be described.

• O. Singh, R. Alforque, B. Bacha, A. Blednykh, P. Cameron, W.X. Cheng, L.R. Dalesio, A.J. Della Penna, L. Doom, R.P. Fliller, G. Ganetis, R. Heese, H.-C. Hseuh, E.D. Johnson, B.N. Kosciuk, S.L. Kramer, S. Krinsky, J. Mead, S. Ozaki, D. Padrazo, I. Pinayev, V. Ravindranath, J. Rose, T.V. Shaftan, S. Sharma, J. Skaritka, T. Tanabe, Y. Tian, F.J. Willeke, L.-H. Yu
  BNL, Upton, Long Island, New York

A new 3rd generation light source (NSLS-II project) is in the early stage of construction at Brookhaven National Laboratory. The NSLS-II facility will provide ultra high brightness and flux with exceptional beam stability. It presents several challenges in the diagnostics and instrumentation, related to the extremely small emittance. In this paper, we present an overview of all planned instrumentation systems, results from research & development activities; and then focus on other challenging aspects.

Slides

• P. Cameron, A. Blednykh, B.N. Kosciuk, I. Pinayev, V. Ravindranath, O. Singh
  BNL, Upton, Long Island, New York

The thermal distortion resulting from BPM button trapped mode heating is potentially problematic for achieving the high precision beam position measurement needed to provide the sub-micron beam position stability required by light source users. We present a button design that has been thermo-mechanically optimized via material selection and component geometry to minimize this thermal distortion. Detailed electromagnetic analysis of the button geometry is presented elsewhere in these proceedings.

• B.N. Kosciuk, R. Alforque, B. Bacha, P. Cameron, F. Lincoln, I. Pinayev, V. Ravindranath, S. Sharma, O. Singh
  BNL, Upton, Long Island, New York

The NSLS-II Light Source being built at Brookhaven National Laboratory is expected to provide submicron stability of the electron orbit in the storage ring in order to utilize fully the very small emittances and electron beam sizes. This requires high stability supports for BPM pick-up electrodes, located near insertion device source. Description of the efforts for development of supports including carbon tubes and invar rods is presented.