| Paper | Title | Page |
|---|---|---|
| MOPB007 | Design of the Superconducting Quarter Wave Resonators for HIAF | 59 |
|
||
| A heavy ion accelerator facility (HIAF) is under development in the Institute of Modern Physics. For the low energy superconducting accelerating section, two types of quarter wave resonators with frequency of 81.25 MHz and β of 0.05 and 0.10 have been proposed. The electro-magnetic design has been optimized in order to reach the high accelerating voltage, and the optimization also included the drift tube face tilting to compensate for the beam steering caused by the asymmetry in the quarter wave resonator geometry. | ||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-SRF2017-MOPB007 | |
| Export • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |
| MOPB074 | Analysis of Higher Order Modes of the Superconducting Cavities for the China-ADS Injector-II in IMP | 231 |
|
||
|
Funding: funded by Natural Science Foundation of China， No.11505253 The influence of the higher order modes on the beam dynamics and the cryogenic losses has been studied for the superconducting section of the CIADS project in this paper. In addition, the necessity of HOM dampers in the Superconducting (SC) cavities is discussed. |
||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-SRF2017-MOPB074 | |
| Export • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |
| THPB024 | Investigation on Depth Profiling of Niobium Surface Composition and Work Function of SRF Cavities | 779 |
|
||
| The niobium samples were prepared by different surface treatments that commonly applied for the superconducting RF cavities preparation, as the following of electrochemical polishing, the buffered chemical polishing and high temperature annealing. In order to understand the property of niobium surface, especially the relationship between the composition and the work function value, the X-ray and ultraviolet photoelectron spectra depth profiling has been studied. The intensity photoelectrons signals of O1s, C1s and the Nb3d were identified for composition of the niobium oxide and the hydrocarbon contamination. And the work function of sample surface was measured via the means of the ultraviolet photoelectron spectra band width. To make a depth profiling, the sputtering of Argon ions was used to remove surface material gradually under by control the sputtering times. The results shown that the value of work function strongly depends on the chemical composition. | ||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-SRF2017-THPB024 | |
| Export • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |
| THPB057 | Investigation of Nucleation Stage in Diffusion Coating of Nb3Sn on Nb | 873 |
|
||
| Nb3Sn has the potential to improve properties of SRF cavities, such as the gradients and the working tempera-tures. Institute of Modern Physics has launched its Nb3Sn thin film coated SRF cavity project in 2016. Samples have been successfully coated to study the process of tin vapor diffusion. The main part of the deposition system is a tube furnace, which working temperature can reach 1100°C. Basic material characterization of the Sn-Nb film will be presented in this work. | ||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-SRF2017-THPB057 | |
| Export • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |