Fast Ferroelectric L-band Tuner

Kazakov, S.; Yakovlev, V. P.; Hirshfield, J. L.; Kanareykin, A.; Nenasheva, Elizaveta

doi:10.1063/1.2409153

Cited by 5 publications

(6 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently developed ferroelectric ceramics with low losses at RF frequencies [32][33][34] allow development of electrically controlled tuners with switching times much better than that of piezo-electric mechanical tuners. Such a tuner is inserted into a high-power transmission line connected to the SRF cavity and allows alteration of coupling between the acceleration structure and the line during the RF pulse [35]. In addition, this tuner would allow electronic control of cavity frequency by a device operating at room temperature within timescales of active compensation of microphonics.…”

Section: Ferroelectric Tuner Randdmentioning

confidence: 99%

“…Schematic of a device to produce fast cavity coupling changes based on a magic-T and two phase shifters containing ferroelectric elements. This device is not under vacuum and is located outside of the cryostat [35].…”

Section: Figure 18mentioning

confidence: 99%

“…It would reduce cryogenic losses in the structure and consequently significantly reduce the overall energy consumption of the accelerator and could eliminate the need to use over-coupled fundamental power couplers, thus significantly reducing RF amplifier power. A proof-of-principle demonstration of the ferroelectric fast reactive tuner (FE-FRT) was successfully conducted at CERN [37]. The timescale in which the FE-FRT is able to shift the cavity frequency across the entire tuning range was measured to be < 50 𝜇s; this is significantly faster than any other cavity tuning device.…”

Section: Ferroelectric Tuner Randdmentioning

confidence: 99%

See 2 more Smart Citations

An 8 GeV Linac as the Booster Replacement in the Fermilab Power Upgrade

Belomestnykh

Checchin

Johnson

et al. 2021

View full text Add to dashboard Cite

Increasing the Main Injector (MI) beam power above ~1.2 MW requires replacement of the 8 GeV Booster by a higher intensity alternative. In the Project X era, rapid-cycling synchrotron (RCS) and Linac solutions were considered for this purpose. In this paper, we consider the Linac version that produces 8 GeV Hbeam for injection into the Recycler Ring (RR) or Main Injector (MI). The Linac takes ~1 GeV beam from the PIP-II Linac and accelerates it to ~2 GeV in a 650 MHz SRF Linac, followed by a ~2-8 GeV pulsed Linac using 1300 MHz cryomodules. The Linac components incorporate recent improvements in SRF technology. The Linac configuration and beam dynamics requirements are presented. Injection options are discussed. Foil-based injection is the present standard but R&D toward implementing laser-assisted injection could enable a significant improvement. Research needed to implement the Booster replacement is described.

show abstract

Section: Ferroelectric Tuner Randdmentioning

confidence: 99%

Section: Figure 18mentioning

confidence: 99%

Section: Ferroelectric Tuner Randdmentioning

confidence: 99%

See 1 more Smart Citation

An 8 GeV Linac as the Booster Replacement in the Fermilab Power Upgrade

Belomestnykh

Checchin

Johnson

et al. 2021

View full text Add to dashboard Cite

show abstract

“…18 All the advantages of the alkyl sulfate-based ILs have become the motivation for the presented work which will broaden the knowledge regarding the already widely studied [C 2 C 1 im]-[EtSO 4 ] and weakly tested [C 2 C 2 im][EtSO 4 ]. 19 For both ILs, this work extended considerably a recent study on heat capacities and related properties executed at atmospheric pressure. 20 In this work, the speed of sound in [C 2 C 1 im]-[EtSO 4 ] and [C 2 C 2 im][EtSO 4 ] was measured at temperatures ranging from 293 to 318 K and at pressures up to 101 MPa.…”

Section: ■ Introductionmentioning

confidence: 71%

Comparative Study of the High Pressure Thermophysical Properties of 1-Ethyl-3-methylimidazolium and 1,3-Diethylimidazolium Ethyl Sulfates for Use as Sustainable and Efficient Hydraulic Fluids

Dzida

Musiał

Zorębski

et al. 2018

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

In this work, we discussed and compared new acoustic (speed of sound), transport (viscosity), surface (surface tension and contact angle on stainless steel and glass), and thermophysical properties with special regard for compressibilities and isobaric thermal expansion of 1,3-diethylimidazolium ethyl sulfate ([C2C2im][EtSO4]) with those of 1-ethyl-3-methylimidazolium ethyl sulfate ([C2C1im][EtSO4]), the reference mineral, synthetic, and biodegradable oils as well as hydraulic oils for use as hydraulic fluids. The refractive indices, NMR spectra, and cytotoxicities of [C2C1im][EtSO4] and [C2C2im][EtSO4] were also investigated. [C2C1im][EtSO4] and [C2C2im][EtSO4] have low isothermal compressibility and isobaric thermal expansion values, which are weakly dependent on the pressure and temperature. The viscosity, surface tension, and contact angle of [C2C2im][EtSO4] are more similar to that of commercial hydraulic oils than [C2C1im][EtSO4]. The investigated ILs have a 20 times lower toxicity on normal fibroblast from human new-born skin than that of bis(trifluoromethylsulfonyl)imide-based ILs. The presented results show that [C2C2im][EtSO4] can potentially be used as a hydraulic fluid in the same way as [C2C1im][EtSO4].

show abstract

“…Ferroelectric tuners: Ferroelectric ceramic materials with low loss tangent at RF frequencies [68,69,70] allow development of electrically controlled devices (tuners) with much shorter switching times than those of piezo-electric mechanical tuners. Such a ferroelectric tuner, when inserted into a high-power transmission line connected to the SRF cavity, can allow to do two things: i) alter the coupling between the transmission line and the acceleration structure [71], and ii) electronically control the cavity frequency within a bandwidth needed for active compensation of microphonics. Aferroelectric tuner could eliminate the need for overcoupled fundamental power couplers, thus significantly reducing RF amplifier power.…”

Section: Other Key Randd Directionsmentioning

confidence: 99%

Key directions for research and development of superconducting radio frequency cavities

Belomestnykh,

Posen,

Bafia

et al. 2022

Preprint

View full text Add to dashboard Cite

Radio frequency superconductivity is a cornerstone technology for many future HEP particle accelerators and experiments from colliders to proton drivers for neutrino facilities to searches for dark matter. While the performance of superconducting RF (SRF) cavities has improved significantly over the last decades, and the SRF technology has enabled new applications, the proposed HEP facilities and experiments pose new challenges. To address these challenges, the field continues to generate new ideas and there seems to be a vast room for improvements. In this paper we discuss the key research directions that are aligned with and address the future HEP needs.

show abstract

Fast Ferroelectric L-band Tuner

Cited by 5 publications

References 1 publication

An 8 GeV Linac as the Booster Replacement in the Fermilab Power Upgrade

An 8 GeV Linac as the Booster Replacement in the Fermilab Power Upgrade

Comparative Study of the High Pressure Thermophysical Properties of 1-Ethyl-3-methylimidazolium and 1,3-Diethylimidazolium Ethyl Sulfates for Use as Sustainable and Efficient Hydraulic Fluids

Key directions for research and development of superconducting radio frequency cavities

Contact Info

Product

Resources

About