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| TUPRO116 | Conceptual Design of the Muon Cooling Channel to Incorporate RF Cavities | 1325 |
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Funding: Work supported by U.S. DOE STTR/SBIR grant DE-SC00006266 A helical cooling channel (HCC) consisting of a pressurized gas absorber imbedded in a magnetic channel that provides solenoid, helical dipole and helical quadrupole fields has been shown to provide six-dimensional phase space reduction for muon beams. Such a channel can be implemented by a helical solenoid (HS) composed of short solenoid coils arranged in a helical pattern. The magnetic channel will provide the desired Bphi, Bz, and dBphi/dr along the reference path. The channel must allow enough space for RF cavities which replace energy lost in the absorber material present for the cooling process. The study will describe how to achieve the desired field while allowing sufficient space for the cavities. The limits to this design imposed by the achievable current density in the coils will be discussed. |
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| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-TUPRO116 | |
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| TUPME016 | Status of the Complete Muon Cooling Channel Design and Simulations | 1379 |
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Funding: Work supported in part by DOE STTR grant DE-SC 0007634. Muon colliders could provide the most sensitive measurement of the Higgs mass and return the US back to the Energy Frontier. Central to the capabilities of such muon colliders are the cooling channels that provide the extraordinary reduction in emittance required for the precise Higgs mass measurement and increased luminosity for enhanced discovery potential of an Energy Frontier Machine. We present the status of the design and simulation of a complete muon cooling channel that is based on the Helical Cooling Channel (HCC), which operates via continuous emittance exchange to enable the most efficient design. |
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| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-TUPME016 | |
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| TUPME017 | Design and Simulation of a Matching System into the Helical Cooling Channel | 1382 |
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Funding: Work supported in part by DOE STTR grant DE-SC 0007634. Muon colliders could provide the most sensitive measurement of the Higgs mass and return the US back to the Energy Frontier. Central to the capabilities of muon colliders are the cooling channels that provide the extraordinary reduction in emittance required for the precise Higgs mass measurement and increased luminosity for enhanced discovery potential of an Energy Frontier Machine. The Helical Cooling Channel (HCC) is able to achieve such emittance reduction and matching sections within the HCC have been successfully designed in the past with lossless transmission and no emittance growth. However, matching into the HCC from a straight solenoid poses a challenge, since a large emittance beam must cross transition. We elucidate on the challenge and present evaluations of two solutions, along with concepts to integrate the operations of a Charge Separator and match into the HCC. |
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| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-TUPME017 | |
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| THPME053 | Cost Rationales for an SRF Proton Linac | 3349 |
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| Rationales to assess and minimize costs for a Superconducting Radio Frequency (SRF) proton linac are outlined. Operating frequency, velocity profile and temperature are regarded as variables when applicable. Hardware plus labor costs for cavities and cryomodules as well as expenditures for facility infrastructures including cryogenic systems, conventional facilities, and relevant subsystems are estimated. The focus is on the assessment of a 10 MW, 1 GeV Continuous Wave (CW) linac for an Accelerator Driven Subcritical Reactor (ADSR) | ||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME053 | |
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| THPME054 | RF Cavity Design Aspects for a Helical Muon Beam Cooling Channel | 3352 |
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Funding: Work supported under U.S. DOE Grant Application Number DE-SC0006266 A Helical Cooling Channel (HCC) promises efficient six-dimensional ionization cooling of muon beams by utilizing high-pressurized gas as a continuous absorber within a magnetic channel embedding RF cavities. The progress on cavity design, tailored for such a cooling channel, is discussed. |
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| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME054 | |
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| THPRI065 | Effects of Beam Loading and Higher-order Modes in RF Cavities for Muon Ionization Cooling | 3921 |
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| Envisioned muon ionization cooling channel is based on vaccum and/or gas-filled RF cavities of frequencies of 325 and 650 MHz. In particular, to meet the luminosity requirement for a muon collider, the muon beam intensity should be on the order of 1012 muons per bunch. In this high beam intensity, transient beam loading can significantly reduce the accelerating gradients and deteriorate the beam quality. We estimate this beam loading effect using an equivalent circuit model. For gas-filled cavity case, the beam loading is compared with plasma loading. We also investigate the excitation of higher-order modes and their effects on the performance of the cavity. | ||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPRI065 | |
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