Application of a new procedure for design of 325 MHz RFQ

Ostroumov, P. N.; Асеев, В. А.; Kolomiets, A. A.

doi:10.1088/1748-0221/1/04/p04002

Cited by 8 publications

(6 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Initial acceleration of the beam is achieved by a Radio Frequency Quadrupole (RFQ) from 0.05 MeV to 2.5 MeV and room temperature (RT) crossbar H-type (CH) accelerating cavities up to 10 MeV [2], [3]. Each of these cavities is coupled with a superconducting solenoid magnet to provide beam focusing [4], [5].…”

Section: Introductionmentioning

confidence: 99%

HINS Superconducting Lens and Cryostat Performance

Page

DiMarco

Huang

et al. 2009

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

Abstract-Fermi National Accelerator Laboratory is involved in the development of a 60 MeV superconducting linac. This linac is part of the High Intensity Neutrino Source (HINS) R&D Program. The initial beam acceleration in the front end section of the linac is achieved using room temperature spoke cavities, each of which is combined with a superconducting focusing solenoid. These solenoid magnets are cooled with liquid helium at 4.5K, operate at 250 A and have a maximum magnetic field strength of 7.5 T. A prototype solenoid cryostat was built and tested at the Fermilab Magnet Test Facility. This paper discusses the test results of the prototype and compares the measured and estimated performance of the cryostat. We also present the methods and results for measuring and fiducializing the axis of the solenoid lens.

show abstract

Section: Introductionmentioning

confidence: 99%

HINS Superconducting Lens and Cryostat Performance

Page

DiMarco

Huang

et al. 2009

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

show abstract

“…Like the IS, the RFQ was also adopted from the HINS experiment and is tasked with accelerating the proton beam from 50 keV to 2.5 MeV [5,6]. Due to a cooling-to-vacuum leak [7], it cannot currently be temperature-regulated.…”

Section: Rfqmentioning

confidence: 99%

IOTA Proton Injector Beamline Installation*

Edstrom

Broemmelsiek

Carlson

et al. 2023

IOTA Proton Injector Beamline Installation*

View full text Add to dashboard Cite

The IOTA Proton Injector (IPI), currently under installation at the Fermilab Accelerator Science and Technology facility (FAST), is a machine capable of delivering 20 mA pulses of protons at 2.5 MeV to the Integrable Optics Test Accelerator (IOTA) ring. First beam in the IPI beamline is anticipated in the first half of 2024, when it will operate alongside the existing electron injector beamline to facilitate further beam physics research and continued development of novel accelerator technologies at the IOTA ring. This report details the expected operational profile, known challenges, and the current state of installation.

show abstract

“…The second option is more desirable to conserve space and shorten the beam path between the RFQ and the first cryomodule. In this work, instead of the more standard output matcher geometry obtained by mirroring the input radial matcher [25] shown in Fig. 2(a), we have developed a new type of output matcher with the geometry shown in Fig.…”

Section: Input and Output Radial Matchersmentioning

confidence: 99%

Full three-dimensional approach to the design and simulation of a radio-frequency quadrupole

Mustapha

Kolomiets

Ostroumov

2013

Phys. Rev. ST Accel. Beams

View full text Add to dashboard Cite

We have developed a new full 3D approach for the electromagnetic and beam dynamics design and simulation of a radio-frequency quadrupole (RFQ). A detailed full 3D model including vane modulation was simulated, which was made possible by the ever advancing computing capabilities. The electromagnetic (EM) design approach was first validated using experimental measurements on an existing prototype RFQ and more recently on the actual full size RFQ. Two design options have been studied, the original with standard sinusoidal modulation over the full length of the RFQ; in the second design, a trapezoidal modulation was used in the accelerating section of the RFQ to achieve a higher energy gain for the same power and length. A detailed comparison of both options is presented supporting our decision to select the trapezoidal design. The trapezoidal modulation increased the shunt impedance of the RFQ by 34%, the output energy by 15% with a similar increase in the peak surface electric field, but practically no change in the dynamics of the accelerated beam. The beam dynamics simulations were performed using three different field methods. The first uses the standard eight-term potential to derive the fields, the second uses 3D fields from individual cell-by-cell models, and the third uses the 3D fields for the whole RFQ as a single cavity. A detailed comparison of the results from TRACK shows a very good agreement, validating the 3D fields approach used for the beam dynamics studies. The EM simulations were mainly performed using the CST MICROWAVE-STUDIO with the final results verified using other software. Detailed segmentby-segment and full RFQ frequency calculations were performed and compared to the measured data. The maximum frequency deviation is about 100 kHz. The frequencies of higher-order modes have also been calculated and finally the modulation and tuners effects on both the frequency and field flatness have been studied. We believe that with this new full 3D approach, the enhanced computing capabilities and the calculation precision the electromagnetic design software offer, we may be able to skip the prototyping phase and build the final product at once, although we recognize that prototyping is still needed to establish and validate the fabrication procedure.

show abstract

Application of a new procedure for design of 325 MHz RFQ

Cited by 8 publications

References 6 publications

HINS Superconducting Lens and Cryostat Performance

HINS Superconducting Lens and Cryostat Performance

IOTA Proton Injector Beamline Installation*

Full three-dimensional approach to the design and simulation of a radio-frequency quadrupole

Contact Info

Product

Resources

About