Review of new shapes for higher gradients

Geng, Rongli

doi:10.1016/j.physc.2006.03.029

Cited by 23 publications

(23 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Table II lists characteristics of three cavity shapes currently being investigated and Fig. 3 shows their cross sections [9]- [11].…”

Section: A Cavity Shapesmentioning

confidence: 99%

“…It has lower risk of field emission and dark current, and its higher order mode (HOM) behavior is well studied. Two alternate shapes, low-loss/Ichiro-shape (LL/IS) [10] and the re-entrant (RE) [11], have advantages of a lower , a higher , and a lower cryogenic loss. They can potentially reach high gradients, since B-peak ultimately limits superconducting operation.…”

Section: A Cavity Shapesmentioning

confidence: 99%

“…4 [13], [14]. A new RE cavity shape with the same aperture as the LL shape has reached 59 MV/m in a Cornell/KEK collaboration [11], [15].…”

Section: A Cavity Shapesmentioning

confidence: 99%

See 2 more Smart Citations

Superconducting RF Cavity Development for the International Linear Collider

Yamamoto

2009

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

The International Linear Collider is planned as the next energy-frontier electron-positron accelerator. The main linacs of the collider are based on superconducting radio-frequency cavity technology, and will accelerate electron and positron beams up to 250 + 250 GeV at the center-of-mass energy. Based on the Reference Design Report issued in 2007, the ILC Global Design Effort has moved into the Technical Design phase. This paper describes the status of the design, R&D efforts, and plans of the superconducting RF cavity for the ILC.

show abstract

“…Table II lists characteristics of three cavity shapes currently being investigated and Fig. 3 shows their cross sections [9]- [11].…”

Section: A Cavity Shapesmentioning

confidence: 99%

Section: A Cavity Shapesmentioning

confidence: 99%

See 1 more Smart Citation

Superconducting RF Cavity Development for the International Linear Collider

Yamamoto

2009

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

show abstract

“…We did ultrasonic hot soap and water rinse for 30 minutes followed by 2 hour HPR at Cornell. Then the cavity reached 59 MV/m best result [1].…”

mentioning

confidence: 95%

Research in Superconducting Radiofrequency Systems

Hoffstaetter¹

2012

View full text Add to dashboard Cite

The aim of the program is to transfer our successes in single cell high gradient R&D to multi-cell cavities of advanced shapes. We have also developed a new technique for electropolishing (EP) which is much less expensive than the standard EP technique used at other labs. Our aim is to apply this technique to multi-cell cavities of advanced shapes. The scientific program of this grant was concluded in 2010. An extension of this grant allowed us to receive ARRA funding, which we used to improve the helium-liquefier system in Cornell's SRF laboratory. Part of this system had been purchased and installed by another grant. The extension to grant DE-FG02-04ER41354 was proposed to extend this system to sufficient power so that helium can be recovered from SRF-cavity test and simultaneously can be liquefied. This significantly increased the number of cavities we can test per week. This upgrade project was finished in the spring of 2010 and has been in regular use ever since. World Record Gradient in Re-entrant Shape Single Cell Cavity Cornell, in collaboration with KEK, has established world record accelerating fields with a new shape in a single cell superconducting niobium cavity: Eacc = 57-59 MV/m [1]. See Figures 1 and 2 for a picture of the cavity and the Q vs E curve. This is a small aperture (60 mm) RE-ENTRANT shape single cell cavity, where the peak surface magnetic field (Hpk) is lower than in the standard re-entrant shape cavity (70 mm aperture). Our first re-entrant cavity had a larger aperture (70 mm)-the same as the TESLA shape cavity aperture-and reached 53 MV/m at KEK. The best gradient in a standard TESLA shape cavity with 70 mm re-entrant shape aperture is 42 MV/m.

show abstract

“…There are also alternate designs which aim at a gradient of 50 MV=m. However, other than single cells [5][6][7] demonstrating the technique, no cavities have reached this ambitious gradient. In order to attain high gradients, it is generally agreed that normal conducting (NC), room temperature accelerators are necessary.…”

Section: Introductionmentioning

confidence: 99%

Wakefield suppression in high gradient linacs for lepton linear colliders

Jones

2009

Phys. Rev. ST Accel. Beams

View full text Add to dashboard Cite

The transverse wakefield excited by multiple bunches in ultrarelativistic charged particle beams in a linear collider must be adequately damped in order to preserve the luminosity of the colliding beams and to prevent a beam breakup instability developing. A review of the means of achieving this wakefield suppression is discussed in detail for normal conducting linacs utilized for linear colliders. In particular, the features of a damped and detuned series of structures are described and compared to other methods. A conspectus of experimental results along with theoretical predictions for this series of accelerating structures developed for the next-linear-collider/global-linear-collider is presented together with the prospects for wakefield suppression for the compact linear collider.

show abstract

Review of new shapes for higher gradients

Cited by 23 publications

References 5 publications

Superconducting RF Cavity Development for the International Linear Collider

Superconducting RF Cavity Development for the International Linear Collider

Research in Superconducting Radiofrequency Systems

Wakefield suppression in high gradient linacs for lepton linear colliders

Contact Info

Product

Resources

About