The quarter wave resonator as a superconducting linac element

Ben‐Zvi, I.; Brennan, J.M.

doi:10.1016/0167-5087(83)90678-6

Cited by 63 publications

(26 citation statements)

References 4 publications

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“…The first superconducting QWR for ion acceleration was proposed by Ben-Zvi and Brennan in 1983 [30]. Since then, QWRs have been employed successfully in many low β linacs [31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Design, prototyping, and testing of a compact superconducting double quarter wave crab cavity

Xiao

Alberty

Belomestnykh

et al. 2015

Phys. Rev. ST Accel. Beams

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We proposed a novel design for a compact superconducting crab cavity with a double quarter wave (DQWCC) shape. After fabrication and surface treatments, this niobium proof-of-principle cavity was tested cryogenically in a vertical cryostat. The cavity is extremely compact yet has a low frequency of 400 MHz, an essential property for service in the Large Hadron Collider luminosity upgrade. The cavity's electromagnetic properties are well suited for this demanding task. The demonstrated deflecting voltage of 4.6 MV is well above the required 3.34 MV for a crab cavity in the future High Luminosity LHC. In this paper, we present the design, prototyping, and results from testing the DQWCC.

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Section: Introductionmentioning

confidence: 99%

Design, prototyping, and testing of a compact superconducting double quarter wave crab cavity

Xiao

Alberty

Belomestnykh

et al. 2015

Phys. Rev. ST Accel. Beams

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“…E z e i½ð!z=cÞþ dz; (2) where ! is the rf frequency, is the phase between the particle and the rf field, and z is the direction of particle propagation.…”

Section: Figures Of Meritmentioning

confidence: 99%

“…They were usually based on resonant transmission lines and are often referred to as TEM structures. Among them are the quarter-wave resonator [2], the coaxial half-wave resonator [3,4], and the spoke resonator [3][4][5][6]. The high-velocity cavities were used almost exclusively for the acceleration of electrons or positrons and were restricted to 0 $ 1.…”

Section: Introductionmentioning

confidence: 99%

Superconducting spoke cavities for high-velocity applications

Hopper

Delayen

2013

Phys. Rev. ST Accel. Beams

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To date, superconducting spoke cavities have been designed, developed, and tested for particle velocities up to 0 $ 0:6, but there is a growing interest in possible applications of multispoke cavities for high-velocity applications. We have explored the design parameter space for low-frequency, highvelocity, double-spoke superconducting cavities in order to determine how each design parameter affects the electromagnetic properties, in particular the surface electromagnetic fields and the shunt impedance. We present detailed design for cavities operating at 325 and 352 MHz and optimized for 0 ¼ 0:82 and 1.

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“…During acceleration of heavy ion beams, all the resonators in the linac are independently phase locked at accelerating gradients which lead to about 6 W of wall losses dissipated in liquid helium at 4.2 K. This typically results in an accelerating gradient of 3-4 MV/m in CW mode. The control scheme for the QWR is based on the dynamic phase control using complex phasor modulator to control the high frequency microphonics, and a mechanical tuner to stabilize the mean resonant frequency [6][7][8]. The mechanical tuner in the QWR used helium gas to flex the niobium bellows located at the high voltage end of the resonator to tune the resonant frequency [2,3] [Fig.…”

Section: Introductionmentioning

confidence: 99%