2011 Particle Accelerator Conference - List of Authors (Schroeder, K.M.)

Paper	Title	Page
THP124	Higher Current Operation for the APS Upgrade	2351
	K.C. Harkay, G. Berenc, M. Borland, Y.-C. Chae, L. Emery, D. Horan, R. Nassiri, V. Sajaev, K.M. Schroeder, G.J. Waldschmidt, A. Xiao, C. Yao ANL, Argonne, USA
	Funding: Work supported by U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. The Advanced Photon Source is a 7-GeV hard x-ray synchrotron light source. Operation for users is delivered at a nominal current of 100 mA in one of three bunch patterns. The APS Upgrade calls for a minimum planned operating current of 150 mA, with an option to deliver beam up to 200 mA. The high-current threshold in the storage ring has been explored, and storage ring components have been identified that either drive collective instabilities or are subjected to excessive beam-drive higher-order-mode (HOM) heating. In this paper, we describe machine studies at 150 mA in a special lattice that simulates the upgraded APS. We also describe the accelerator upgrades that are required to accommodate 200-mA operation, as well as the ongoing machine studies plan.

Paper

Title

Page

Higher Current Operation for the APS Upgrade

2351

K.C. Harkay, G. Berenc, M. Borland, Y.-C. Chae, L. Emery, D. Horan, R. Nassiri, V. Sajaev, K.M. Schroeder, G.J. Waldschmidt, A. Xiao, C. Yao
ANL, Argonne, USA

Funding: Work supported by U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.
The Advanced Photon Source is a 7-GeV hard x-ray synchrotron light source. Operation for users is delivered at a nominal current of 100 mA in one of three bunch patterns. The APS Upgrade calls for a minimum planned operating current of 150 mA, with an option to deliver beam up to 200 mA. The high-current threshold in the storage ring has been explored, and storage ring components have been identified that either drive collective instabilities or are subjected to excessive beam-drive higher-order-mode (HOM) heating. In this paper, we describe machine studies at 150 mA in a special lattice that simulates the upgraded APS. We also describe the accelerator upgrades that are required to accommodate 200-mA operation, as well as the ongoing machine studies plan.