Tag archive: cavity gradient

Major goal achieved for high-gradient ILC SCRF cavities

| 21 November 2012 One 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: , , ,

After the TDR: what’s next for ILC?

| 28 June 2012 New 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: , , ,

Advances in SCRF cavity performance in the Technical Design Phase

| 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: , , , , ,

More knobs, more knowledge

| 29 March 2012 In their unflagging quest to achieve higher gradients for the ILC, scientists in the 9-mA study programme at DESY’s FLASH facility develop a better knack for automating accelerator voltages, helping keep cavity gradients high and the whole system stable. Category: Feature | Tagged: , , , , ,

Good gradients in seconds flat

| 4 August 2011 A 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: , , , , ,

PAC meeting in Taiwan: accelerator recommendations

| 14 July 2011 The ILC Program Advisory Committee met at Academia Sinica in Taiwan in May. They made a set of specific comments and recommendations regarding the accelerator R&D programme and GDE plans and progress towards a Technical Design Report. Category: Director's Corner | Tagged: , , , , , , ,

From KEK: Japanese 9-cell SCRF cavity meets ILC specification

| 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: , , , , , ,

Evolving the ILC baseline: main linac operating gradient

| 9 December 2010 Today, 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 milestone achieved

| 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: , ,

China reaching the target gradient

9 September 2010 A 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: , , , , ,
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