Low beta spoke cavity multipacting analysis

徐波,; 李菡,; 张娟,; 沙鹏,; 王群要,; 林海英,; 黄泓,; 戴建枰,; 孙毅,; 王光伟,; 潘卫民,

doi:10.1088/1674-1137/37/12/127003

Cited by 3 publications

(1 citation statement)

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“…The transverse feedback (TFB) has been used to make precision measurements of betatron tunes for beam studies and for user operation. For example, at Duke FEL laboratory a precision tune measurement system was developed based upon the bunch-by-bunch transverse feedback (TFB) [14]. With this system, the betatron tunes can be accurately measured with an rms uncertainty of a few 10 −5 , as limited by the short-term stability of magnet power supplies and the maximum data memory available in the TFB system.…”

Section: Introductionmentioning

confidence: 99%

Study of magnetic hysteresis effects in a storage ring using precision tune measurement

Hao

Mikhailov

et al. 2016

Chinese Phys. C

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With advances in accelerator science and technology in the recent decades, the accelerator community has focused on the development of next-generation light sources, for example the diffraction-limited storage rings (DLSRs), which requires precision control of the electron beam energy and betatron tunes. This work is aimed at understanding magnet hysteresis effects on the electron beam energy and lattice focusing in the circular accelerators, and developing new methods to gain better control of these effects. In this paper, we will report our recent experimental study of the magnetic hysteresis effects and their impacts on the Duke storage ring lattice using the transverse feedback based precision tune measurement system. The major magnet hysteresis effects associated with magnet normalization and lattice ramping are carefully studied to determine an effective procedure for lattice preparation while maintaining a high degree of reproducibility of lattice focusing. The local hysteresis effects are also studied by measuring the betatron tune shifts resulted from adjusting the setting of a quadrupole. A new technique has been developed to precisely recover the focusing strength of the quadrupole by returning it to a proper setting to overcome the local hysteresis effect.

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Section: Introductionmentioning

confidence: 99%

Study of magnetic hysteresis effects in a storage ring using precision tune measurement

Hao

Mikhailov

et al. 2016

Chinese Phys. C

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Design and test of a superconducting magnet in a linear accelerator for an Accelerator Driven Subcritical System

Peng

Wang³

et al. 2014

Nuclear Instruments and Methods in Physics Research Section A:

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Multipacting studies of the coaxial coupler for BNCT DTL

Fan

Liu

et al. 2019

J. Phys.: Conf. Ser.

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Multipacting is a phenomenon in which electrons grow sharply under certain conditions in a RF structure. It may lead to the breakdown or even damage to the equipment. Therefore, it is very important to calculate the Multipacting range in the RF equipment design. Since the phenomenon is too complicated to use the formula to fully predict it, numerical simulation is employed. There are many computer codes (such as Track3P, MultiPac, CST PS, etc.) used to simulate the phenomenon, but most of them are not commercial. In this paper, theories used in coaxial line for predicting multipacting are introduced; the CST PS is chosen to simulate the multipacting of coaxial coupler for BNCT DTL; finally, methods of suppressing multipacting are discussed.

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Low beta spoke cavity multipacting analysis

Cited by 3 publications

References 0 publications

Study of magnetic hysteresis effects in a storage ring using precision tune measurement

Study of magnetic hysteresis effects in a storage ring using precision tune measurement

Design and test of a superconducting magnet in a linear accelerator for an Accelerator Driven Subcritical System

Multipacting studies of the coaxial coupler for BNCT DTL

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