Barry Barish | 21 November 2012One of the most important goals of the Global Design Effort has been to demonstrate that high-gradient cavities can be reliably produced in industry. We established two gradient goals: to produce cavities qualified at 35 Megavolts per metre (MV/m) in vertical tests and to demonstrate that an average gradient of 31.5 MV/m is achievable for ILC cryomodules. Furthermore, we set a goal of producing these high-gradient cavities in industry with 50% yield by 2010 and 90% yield by the end of 2012. We have recently achieved these ambitious goals!
Category: Director's Corner | Tagged: accelerator R&D, cavity gradient, superconducting cavity, TDR
Marc Ross | 28 June 2012New machines set new challenges for accelerator experts, and there are a number of challenges that the ILC R&D team has had to face before sitting down to write a convincing Technical Design Report. Beam test facilities in all regions have delivered and are still delivering important results. Project Manager Marc Ross takes stock.
Category: Director's Corner | Tagged: cavity gradient, SCRF, TDR, Technical Design Phase
Leah Hesla | 4 August 2011A stable particle beam needs a trouble-free path on its way to high energies, and that means providing it with a smooth gradient to ascend. A team of scientists at Fermilab has arrived at a way to control accelerating cavities so they can give particle beams exactly that – a tilt-free path to collision.
Category: Feature | Tagged: 9 mA experiment, cavity gradient, cavity testing, DESY, Fermilab, FLASH
Rika Takahashi | 9 December 2010Designing 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 | 9 December 2010Today, I will describe the first of those proposed change actions completed in recent weeks. [...] The proposal that I have approved sets the average operating gradient of 31.5 MV/m for operation of the main linac cryomodules, with a spread of up to 20 percent. We believe these parameters are realistic and achievable, but represent challenging goals.
Category: Director's Corner | Tagged: cavity gradient, CM1, gradient, ILC baseline, main linac, operating gradient
Barry Barish | 4 November 2010One 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
9 September 2010A 1.3-gigahertz TESLA-type nine-cell niobium superconducting cavity, named PKU3, as the third nine-cell cavity fabricated by the superconducting radiofrequency (RF) group at Peking University, Beijing, China, achieved an accelerating gradient of 28.6 megavolts per metre (MV/m) at an unloaded quality factor of 4×109 in its second vertical test at Jefferson Lab (JLab), USA on 9 August 2010. This cavity is the first nine-cell cavity with end group components in China reaching a gradient usable for the ILC.
Category: Around the World | Tagged: 1.3 GHz, accelerating gradient, cavity gradient, China, nine-cell cavity, PKU3
