Empty-bucket techniques for spill-quality improvement at the CERN Super Proton Synchrotron

被引：0

作者：

Sota, Pablo A. Arrutia ^{[1
,4
]}

Fraser, Matthew A. ^{[1
]}

Hagmann, Gregoire ^{[1
]}

Kain, Verena ^{[1
]}

Papotti, Giulia ^{[1
]}

Spierer, Arthur ^{[1
]}

Velotti, Francesco M. ^{[1
]}

Burrows, Philip N. ^{[2
]}

Piandani, Roberto ^{[1
,3
]}

机构：

[1] CERN, Geneva, Switzerland

[2] Univ Oxford, John Adams Inst, Oxford, England

[3] Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78240, Mexico

[4] Univ Oxford, Oxford, England

来源：

PHYSICAL REVIEW ACCELERATORS AND BEAMS | 2024年 / 27卷 / 07期

关键词：

D O I：

10.1103/PhysRevAccelBeams.27.074001

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Synchrotrons can provide long spills of particles by employing resonant extraction where the circulating beam is slowly ejected over thousands to millions of turns by exploiting the amplitude growth caused by a transverse resonance. In the CERN Super Proton Synchrotron (SPS), this method is used to satisfy the experimental requests of the North Area. However, the extracted particle flux is modulated by power- converter ripple, an issue shared across all sychrotrons that perform resonant extraction. In order to suppress such modulations, empty-bucket techniques can be employed, which take advantage of chromaticity to quickly accelerate particles into resonant motion by using a longitudinal rf system. This paper explores empty-bucket techniques via theory, simulation, and measurement, providing a systematic characterization with general applicability to any machine. Additionally, the operational implementation in the SPS is detailed, where the impact on the beam profile and extracted intensity is addressed.

引用

页数：14

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