Title :
The Next Linear Collider damping ring complex
Author :
Corlett, J.N. ; Marks, S. ; Rimmer, R. ; Schlueter, R. ; Bellomo, P. ; Bharadwaj, V. ; Cassel, R. ; Corredoura, P. ; Emma, P. ; Jobe, R.K. ; Krejcik, P. ; Mao, S. ; McKee, B. ; Millage, K. ; Munro, M. ; Pappas, C. ; Raubenheimer, T.O. ; Rokni, S. ; Ross,
Author_Institution :
Lawrence Berkeley Nat. Lab., CA, USA
Abstract :
We report progress on the design of the Next Linear Collider (NLC) damping rings complex (DRC). The purpose of the DRC is to provide 120 Hz, low emittance electron and positron bunch trains to the NLC linacs. It consists of two 1.98 GeV main damping rings, one positron pre-damping ring, two pairs of bunch length and energy compressor systems and interconnecting transport lines. The 2 main damping rings store up to 0.8 amp in 3 trains of 95 bunches each and have normalized extracted beam emittances γ∈x=3 μm-rad and γ∈ y=0.03 μm-rad. The preliminary optical design, performance specifications and tolerances are given. Key subsystems include: 1) the 714 MHz RF system, 2) the 60 ns risetime injection/extraction pulsed kicker magnets, 3) the 44 m wiggler magnet system, 4) the arc and wiggler vacuum system, 5) the radiation management system, 6) the beam diagnostic instrumentation, 7) special systems used for downstream machine protection and 8) feedback-based stabilization systems
Keywords :
accelerator RF systems; accelerator magnets; electromagnets; electron accelerators; particle beam bunching; particle beam diagnostics; particle beam extraction; particle beam injection; particle beam stability; storage rings; 0.8 A; 1.98 GeV; 120 Hz; 44 m; 714 MHz; NLC; Next Linear Collider damping ring complex; RF system; beam diagnostic instrumentation; downstream machine protection; electron bunch train; energy compressor systems; extracted beam emittances; feedback-based stabilization systems; injection; interconnecting transport lines; positron bunch train; predamping ring; pulsed kicker magnets; wiggler magnet system; Damping; Electron emission; Linear accelerators; Magnets; Optical design; Optical pulses; Positrons; Radio frequency; Undulators; Vacuum arcs;
Conference_Titel :
Particle Accelerator Conference, 1999. Proceedings of the 1999
Conference_Location :
New York, NY
Print_ISBN :
0-7803-5573-3
DOI :
10.1109/PAC.1999.792326
