In-situ proton irradiation and measurement of superconducting RF cavities under cryogenic conditions

Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI:10.1109/PAC.1997.753120

B. Rusnak, W. Haynes, K.C.D. Chan, R. Gentzlinger, R. Kidman, N. King, R. Lujan, M. Maloney, S. Ney, A. Shapiro, J. Ullmann, A. Hanson, H. Safa

{"title":"In-situ proton irradiation and measurement of superconducting RF cavities under cryogenic conditions","authors":"B. Rusnak, W. Haynes, K.C.D. Chan, R. Gentzlinger, R. Kidman, N. King, R. Lujan, M. Maloney, S. Ney, A. Shapiro, J. Ullmann, A. Hanson, H. Safa","doi":"10.1109/PAC.1997.753120","DOIUrl":null,"url":null,"abstract":"The Accelerator Production of Tritium (APT) Project is investigating using a superconducting linac for the high-energy portion of the accelerator. As this accelerator would be used to accelerate a high-current (100-mA) CW proton beam up to 1700 MeV, it is important to determine the effects of stray-beam impingement on the superconducting properties of 700-MHz Nb cavities. To accomplish this, two 3000-MHz elliptical niobium cavities were placed in a cryostat, cooled to nominally 2 K in sub-atmospheric liquid helium, and irradiated with 798-MeV protons at up to 490-nA average current. The elliptically shaped beam passed through the equatorial regions of both cavities in order to maximize sensitivity to any changes in the superconducting surface resistance. Over the course of the experiment, 6/spl times/10/sup 16/ protons were passed through the cavities. After irradiation, the cavities were warmed to 250 K, then recooled to investigate the effects of a room-temperature annealing cycle on the superconducting properties of the irradiated cavities. A detailed description of the experiment and the results shall be presented. These results are important to employing superconducting RF technology to future high-intensity proton accelerators for use in research and transmutation technologies.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1997-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/PAC.1997.753120","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 3

Abstract

The Accelerator Production of Tritium (APT) Project is investigating using a superconducting linac for the high-energy portion of the accelerator. As this accelerator would be used to accelerate a high-current (100-mA) CW proton beam up to 1700 MeV, it is important to determine the effects of stray-beam impingement on the superconducting properties of 700-MHz Nb cavities. To accomplish this, two 3000-MHz elliptical niobium cavities were placed in a cryostat, cooled to nominally 2 K in sub-atmospheric liquid helium, and irradiated with 798-MeV protons at up to 490-nA average current. The elliptically shaped beam passed through the equatorial regions of both cavities in order to maximize sensitivity to any changes in the superconducting surface resistance. Over the course of the experiment, 6/spl times/10/sup 16/ protons were passed through the cavities. After irradiation, the cavities were warmed to 250 K, then recooled to investigate the effects of a room-temperature annealing cycle on the superconducting properties of the irradiated cavities. A detailed description of the experiment and the results shall be presented. These results are important to employing superconducting RF technology to future high-intensity proton accelerators for use in research and transmutation technologies.

查看原文本刊更多论文

低温条件下超导射频腔的原位质子辐照与测量

加速器生产氚(APT)项目正在研究使用超导直线加速器作为加速器的高能部分。由于该加速器将用于将大电流(100 ma)连续质子束加速到1700 MeV，因此确定杂散束撞击对700 mhz Nb腔超导性能的影响非常重要。为了实现这一目标，两个3000兆赫的椭圆铌腔被放置在低温恒温器中，在亚大气液氦中冷却到2 K，并用798 mev的质子以高达490 na的平均电流照射。椭圆形状的光束通过两个腔的赤道区域，以便最大限度地灵敏度在超导表面电阻的任何变化。在整个实验过程中，有6/spl次/10/sup / 16个质子通过空腔。辐照后，将空腔加热至250 K，然后再冷却，研究室温退火循环对辐照空腔超导性能的影响。应详细说明实验和结果。这些结果对于将超导射频技术应用于未来高强度质子加速器的研究和嬗变技术具有重要意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)

自引率

0.00%

发文量