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 […]
After the TDR: what’s next for ILC?
Today's issue features a Director's Corner from Marc Ross, Project Manager for the Global Design Effort.
“We are just standing at the entrance, and our world efforts need to continue or become even stronger.” These are the words Kaoru Yokoya used to close his ILC NewsLine Director’s Corner at the end of last year. (The italics are mine.) Six months later his words continue to ring true and are perhaps a […]
Advances in SCRF cavity performance in the Technical Design Phase
This week's issue features a Director's Corner from Akira Yamamoto, Project Manager for the Global Design Effort
The current ILC superconducting radiofrequency (SCRF) cavity design is based on the so-called TESLA type (the elliptical shape as shown at left), a 1.3-gigahertz (GHz) nine-cell cavity. The design gradient has been set at 35 megavolts per metre (MV/m) and an average quality factor (Q0) of greater than 8×109 to realise the stable, long-term operation […]
More knobs, more knowledge
Long-bunch-train ILC studies are back at FLASH
Accelerator theory and operating experience are all well and good. But if you’re planning and researching the next-generation particle accelerator, you sometimes need to crank things to their limits in order to get a step further. The 9-mA team has descended again on DESY’s FLASH accelerator in March to share control room space with the DESY […]
Good gradients in seconds flat
Fermilab scientists turn their attention to individual cavities to improve beam stability
A constant acceleration gradient along many thousands of particle bunches provides for a particle beam’s sure-footed climb to higher energies, readying the beam for collision by providing the same acceleration for each bunch. But constant gradients don’t come naturally for accelerating cavities, the elements that pave the particles’ ascending path. A cavity has to be […]
PAC meeting in Taiwan: accelerator recommendations
The ILC Program Advisory Committee (PAC) held their semi-annual review of the ILC detector and accelerator programmes at Academia Sinica in Taipei, Taiwan from 19-20 May and made a set of specific recommendations regarding the GDE accelerator R&D programme towards a Technical Design Report (TDR). Overall, the review was quite positive and supportive of our […]
From KEK: Japanese 9-cell SCRF cavity meets ILC specification
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 0.8×1010. A Japanese cavity now fulfilled those requirements for the first time at a test which took place at […]
Evolving the ILC baseline: main linac operating gradient
Director’s Corner 9 December 2010 Barry Barish Evolving the ILC baseline: main linac operating gradient Last week I described the motivation and the process for evolving the baseline for the technical design effort that we will be carrying out over the next two years, culminating in a Technical Design Report (TDR) at the end of […]
Cavity gradient milestone achieved
Director’s Corner 4 November 2010 Barry Barish Cavity gradient milestone achieved 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 = 8×109 and 50 percent production yield. (Q0 […]
China reaching the target gradient
PKU3, the first nine-cell cavity in China reaching a gradient usable for the ILC, in JLab clean room before vertical test. Image: Fumio Furuta 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 […]