Sub-THz Waveguide Spectroscopy of Coating Materials for Particle Accelerators

Condensed Matter

Lucia Lain Amador¹  Wilhelmus Vollenberg¹  Can Koral²  MariaRosaria Masullo²  Antonello Andreone³  Andrea Passarelli³ 

[1] CERN TE-VSC-SCC, CH-1211 Geneve, Switzerland;INFN Naples Unit, 80131 Naples, Italy;Physics Department, University of Naples “Federico II”, 80131 Naples, Italy;

关键词: thz;    waveguide spectroscopy;    coating materials;    particle accelerators;   

DOI  :  10.3390/condmat5010009

来源: DOAJ

【 摘 要 】

The electromagnetic characterisation of different materials for the inner wall coating of beam pipes is a long-standing problem in accelerator physics, regardless the purpose they are used for, since their presence may affect in an unpredictable way the beam coupling impedance and therefore the machine performance. Moreover, in particle accelerators and storage rings of new generation very short bunches might be required, extending far in frequency the exploration of the beam spectrum and rendering therefore more and more important to assess the coating material response up to hundreds of GHz. This paper describes a time domain method based on THz waveguide spectroscopy to infer the coating properties at very high frequencies. The technique has been tested on Non Evaporable Getter thick films deposited by DC magnetron sputtering on copper plates.

【 授权许可】

Unknown