2007 IEEE Particle Accelerator Conference (PAC) 2007
DOI: 10.1109/pac.2007.4441243
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Fabrication and performance of superconducting RF cavities for the cornell ERL injector

Abstract: Six 1300 MHz superconducting niobium 2-cell cavities are manufactured in-house for the prototype of the Cornell ERL injector to boost the energy of a high current, low emittance beam produced by a DC gun. Designed for high current beam acceleration, these cavities have new characteristics as compared to previously developed low-current cavities such as those for TTF. Precision manufacture is emphasized for a better straightness of the cavity axis so as to avoid unwanted emittance dilution. We present the manuf… Show more

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Cited by 5 publications
(5 citation statements)
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“…1). For the ERL cavity the presence of MP in this region was experimentally confirmed by a biased probe and correlated temperature changes at the outer wall [2]. Our analysis shows that the amplitude of the electric field along the cavity profile line has a minimum at the location of MP.…”
Section: Introductionsupporting
confidence: 59%
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“…1). For the ERL cavity the presence of MP in this region was experimentally confirmed by a biased probe and correlated temperature changes at the outer wall [2]. Our analysis shows that the amplitude of the electric field along the cavity profile line has a minimum at the location of MP.…”
Section: Introductionsupporting
confidence: 59%
“…Computer simulation showed that the MP has occurred in transition regions between a cavity and a beam-pipe [2,3]. Our analysis offers an insight into which electromagnetic field configuration is necessary to support multipacting in such geometries.…”
mentioning
confidence: 93%
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“…Despite the low accelerating field at the cathode and low gun energy of it DC gun, the Cornell team was able to demonstrate XFEL-level beam brightness at their injector test facility operating the gun at 395 kV [16]. This was made possible by a combination of several factors, the use of a low thermal emittance semiconductor cathode, and with the DC gun followed by a 1.3 GHz NC prebuncher and by a special capture section composed by a cryomodule with five 2-cell SRF cavities resonating at 1.3 GHz (specially designed for the injector [83]) to accelerate the beam to up 15 MeV [84]. The use of these special short cavities allows to reduce at acceptable levels the RF phase detuning associated with the transit time of the low-energy non-relativistic beam.…”
Section: Direct Current Gunsmentioning
confidence: 99%
“…To operate at high-duty-cycle, the booster must use superconducting accelerating cavities to eliminate the RF power losses along the SRF structures and to essentially minimize the required RF power to just the amount necessary to accelerate the beam. The dominant geometry used for the SRF cavities is the 9-cell 1.3 GHz TESLA/TTF [12], but other geometries, as the one used in the Jefferson Lab 1.5 GHz SRF cavities [88], or in the Cornell 2-cell 1.3 GHz specially designed for operating with a low energy gun [83], are used as well. The booster section can be typically composed of one or two cryostats containing the SRF cavities.…”
Section: Rf Booster and Prebunchermentioning
confidence: 99%