Emittance limitation in cooled hadron beams

被引：15

作者：

Okabe, K ^{[1
]}

Okamoto, H ^{[1
]}

机构：

[1] Hiroshima Univ, Grad Sch Adv Sci Matter, Dept Quantum Matter, Higashihiroshima 7398530, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS | 2003年 / 42卷 / 7A期

关键词：

coherent resonance; beam cooling; storage ring; space-charge-dominated beam;

D O I：

10.1143/JJAP.42.4584

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We identify an essential factor that limits the lowest achievable temperature of a stored hadron beam when it is cooled. Two different numerical techniques, i.e. the particle-in-cell and molecular dynamics methods, are employed to simulate the collective beam behavior in a storage ring. It is demonstrated that a cooling process can be strongly interrupted by linear and nonlinear resonance stopbands. In particular, a serious tune locking occurs when a second-order coherent resonance is encountered during cooling. We show that, in order to reach the space-charge limit by means of a strong dissipative force, the design phase advance per lattice period must be smaller than 90 degrees.

引用

页码：4584 / 4592

页数：9

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