Design study for medium energy high intensity proton accelerator

Pathak, Abhishek; Roy, Shweta; Rao, S.V.L.S.; Krishnagopal, S.

doi:10.1103/physrevaccelbeams.23.090101

Cited by 3 publications

(1 citation statement)

References 19 publications

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“…In the present work, we study multipactor discharge in a superconducting spoke resonator (SSR-C) cavity, which was designed at a certain stage during the design of Medium Energy High-Intensity Proton Accelerator [21]. The simulation of multipacting has been performed using CST Particle Studio (CST PS).…”

Section: Brief Description Of Simulationmentioning

confidence: 99%

Suppression of multipacting growth in a superconducting spoke resonator by the use of higher order modes

Ghosh,

Sista

2024

J. Inst.

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Multipacting is a vacuum discharge phenomenon that constrains the performance of accelerator structures and various microwave devices significantly. The different ways to mitigate multipacting discharge have been a central research goal in Accelerator Physics & Technologies for a prolonged period. In this work, both Monte-Carlo and particle-in-cell (PIC) simulations show that the multipactor avalanche can be mitigated, by the use of Higher Order Modes (HOMs). The intuition behind the approach of using HOMs to suppress multipacting has been explained first. Then, the multipacting suppression has been demonstrated in a simple 1-D metallic gap, when it is exposed to a second carrier frequency in addition to fundamental rf mode, with the help of a Monte-Carlo simulation code. Finally, a detailed PIC simulation has been carried out using CST Microwave studio, to investigate the effect of various HOMs on the multipactor growth in a superconducting spoke cavity. It is observed that a slight excitation of some particular modes can drastically diminish the multipactor growth. Simulation has been done first without any HOMs, to calculate the growth rate and also to spot the discharge location. Next, among various HOMs (more specifically, quadrupole modes), only those have been selected, whose magnetic field locations coincide with the multipacting prone zone of the cavity. In a simulation study, the presence of these preselected quadrupole modes has been found to exhibit a substantial suppression effect on the multipacting growth of the cavity.

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Section: Brief Description Of Simulationmentioning

confidence: 99%

Suppression of multipacting growth in a superconducting spoke resonator by the use of higher order modes

Ghosh,

Sista

2024

J. Inst.

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Design and development of resonant ring test setup at 325 MHz for high power testing of RF couplers used in accelerator

Sharma,

Jose,

Singh

et al. 2025

Nuclear Instruments and Methods in Physics Research Section A:

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Simple Design Criterion for High-Intensity Hadron Linacs

Kasagaki,

Okamoto

2024

Progress of Theoretical and Experimental Physics

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A simple procedure is established to optimize fundamental design parameters of a high-intensity hadron linac where interparticle Coulomb interaction plays a crucial role. Based on the recently proposed semi-empirical resonance condition, a stability map is constructed which reveals potentially dangerous operating regions in tune space. The map is shown to be consistent with numerical data obtained from more complicated approaches. The effectiveness of the new design scheme is demonstrated through systematic particle-in-cell simulations assuming the most typical structure of an Alvarez-type drift tube linac. The present results suggest that the so-called equipartitioning condition, which has often been taken very seriously in high-intensity linac designs, is not necessarily met to guarantee the best machine performance. The basic design concept described here can be applied not only to linacs but also to circular machines.

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Design study for medium energy high intensity proton accelerator

Cited by 3 publications

References 19 publications

Suppression of multipacting growth in a superconducting spoke resonator by the use of higher order modes

Suppression of multipacting growth in a superconducting spoke resonator by the use of higher order modes

Design and development of resonant ring test setup at 325 MHz for high power testing of RF couplers used in accelerator

Simple Design Criterion for High-Intensity Hadron Linacs

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