Measurement of electrodynamics characteristics of higher order modes for harmonic cavity at 2400 MHz

2nd Conference on Plasma & Laser Research and Technologies

Shashkov, Ya V.^1 ; Sobenin, N.P.^1 ; Gusarova, M.A.^1 ; Lalayan, M.V.^1 ; Bazyl, D.S.^1 ; Donetskiy, R.V.^1 ; Orlov, A.I.^1 ; Zobov, M.M.^2 ; Zavadtsev, A.A.^3

National Research Nuclear University MEPHI, Kashirskoe sh.31, Moscow

115409, Russia^1

LNF-INFN, Via Enrico Fermi 40, Frascati (Rome)

00044, Italy^2

LLC Nano Invest, Perovskaya st. 61/2, Moscow

111394, Russia^3

关键词: Drift tube;    Fundamental frequencies;    Higher-order modes;    Large Hadron Collider;    Measurements of;    Narrow beams;    Single cells;    Two-cavity;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/747/1/012088/pdf
DOI  :  10.1088/1742-6596/747/1/012088

来源: IOP

【 摘 要 】

In the frameworks of the High Luminosity Large Hadron Collider (HL-LHC) upgrade program an application of additional superconducting harmonic cavities operating at 800 MHz is currently under discussion. As a possible candidate, an assembly of two cavities with grooved beam pipes connected by a drift tube and housed in a common cryomodule, was proposed. In this article we discuss measurements of loaded Q-factors of higher order modes (HOM) performed on a scaled aluminium single cell cavity prototype with the fundamental frequency of 2400 MHz and on an array of two such cavities connected by a narrow beam pipe. The measurements were performed for the system with and without the matching load in the drift tube.