Tag archive: quality factor
Julianne Wyrick | 21 November 2013
After years of pursuing purity in the niobium material used to make superconducting radiofrequency cavities, a Fermilab team led by Anna Grassellino has found that baking cavities to introduce certain impurities may improve the cavity performance. The new method may provide a way for ILC-type cavities to reach up to three times higher quality factors—enabling more cost-effective accelerators.
Category:
Around the World | Tagged:
cavity gradient, Fermilab, high-gradient cavity, medium-field Q slope, quality factor, SRF cavity, SRF technology, superconducting cavity
Julianne Wyrick | 25 July 2013
Hydrogen has long been known as a possible enemy of superconducting radiofrequency (SRF) cavities - like those needed for the ILC - thanks to its potential to form non-superconducting hydrides that limit cavity quality factor (Q) and gradient. Researchers at Fermilab have made further progress in understanding the full physics behind hydrogen involvement, which is an important step towards improvements in cavity processing.
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Around the World | Tagged:
cavity, cavity R&D, Fermilab, quality factor, SCRF, SRF technology, superconducting cavity
Daisy Yuhas | 23 August 2012
Physicists need to understand each accelerator cavity individually before assembling a collider. One of the cavity characteristics physicists measure is called the cavity quality factor, Q factor for short. The LCpedia series continues.
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LCpedia | Tagged:
cavity, quality factor, SCRF
Akira Yamamoto | 29 March 2012
As a result of the continued improvement of cavity processing and a better understanding of the gradient limit, researchers are closely approaching their design goals, with the hope of reaching them by the end of 2012.
Category:
Director's Corner | Tagged:
cavity gradient, cavity R&D, quality factor, SCRF, SRF, Technical Design Phase
Rika Takahashi | 9 December 2010
Designing and fabricating an optimal accelerating cavity is not so simple. There are two important parameters scientists are looking for: the gradient of 35 megavolts per meter (MV/m) and the quality factor (Q0) of greater than 0.8×10^10. A Japanese cavity now fulfilled those requirements for the first time at a test which took place at the Superconducting radiofrequency Test Facility (STF) at KEK, adding momentum towards future mass production.
Category:
Feature | Tagged:
accelerating gradient, cavity gradient, KEK, Kyoto camera, nine-cell cavity, quality factor, STF
Barry Barish | 4 November 2010
One of our most visible and important ILC R&D short-term milestones has been to demonstrate production of ILC superconducting radio frequency cavities with gradient of greater than or equal to 35 megavolts per metre (MV/m) and Q0 = 8x10^9 and 50 percent production yield. [...] Today I announce the successful achievement of that important 2010 milestone.
Category:
Director's Corner | Tagged:
cavity gradient, milestone, quality factor
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