Beam stability issues of the VLHC rings

Ng, K.-Y.

Fermi National Accelerator Laboratory

关键词: Linear Colliders;    43 Particle Accelerators;    Beam Bunching;    Hadrons;    Impedance;   

DOI  :  10.2172/780448
RP-ID  :  FERMILAB-TM-2147
RP-ID  :  AC02-76CH03000
RP-ID  :  780448

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来源: UNT Digital Library

【 摘 要 】

Beam stability issues of the VLHC rings in Phase 1 and Phase 2 are reviewed. For accelerator rings of circumference 232 km and beam pipe radius of the order of 1 cm, the impedance of the vacuum chamber is dominated by the resistive wall. The most dangerous instabilities are the single-bunch transverse mode coupling instability and the transverse coupled bunch instability driven by the resistive wall at sub-revolution frequency. Scaling is studied concerning the thresholds of these instabilities and the dominance of the resistive wall impedance as the size of the accelerator increases.