NAPAC2016 - List of Authors (McIntyre, P.M.)

Paper	Title	Page
MOB2CO03	Collider in the Sea: Vision for a 500 TeV World Laboratory	13
	P.M. McIntyre, S.P. Bannert, J. Breitschopf, J. Gerity, J.N. Kellams, A. Sattarov Texas A&M University, College Station, USA S. Assadi HiTek ESE LLC, Madison, USA D. Chavez DCI-UG, León, Mexico N. Pogue LLNL, Livermore, California, USA
	A design is presented for a hadron collider in which the magnetic storage ring is configured as a circular pipeline, supported in neutral buoyancy in the sea at a depth of ~100 m. Each collider detector is housed in a bathysphere the size of the CMS hall at LHC, also neutral-buoyant. Each half-cell of the collider lattice is ~300 m long, housed in a single pipe that contains one dipole, one quadrupole, a correction package, and all umbilical connections. A choice of ~4 T dipole field, 2000 km circumference provides a collision energy of 700 TeV. Beam dynamics is dominated by synchrotron radiation damping, which sustains luminosity for >10 hours. Issues of radiation shielding and abort can be accommodated inexpensively. There are at least ten sites world-wide where the collider could be located, all near major urban centers. The paper summarizes several key issues; how to connect and disconnect half-cell segments of the pipeline at-depth using remote submersibles; how to maintain the lattice in the required alignment; provisions for the injector sequence.
	Slides MOB2CO03 [3.440 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-MOB2CO03
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPOB54	Superferric Arc Dipoles for the Ion Ring and Booster of JLEIC	184
	P.M. McIntyre, J. Breitschopf, T. Elliott, R. Garrison, J. Gerity, J.N. Kellams, A. Sattarov Texas A&M University, College Station, USA D. Chavez DCI-UG, León, Mexico
	Funding: This work was supported by a grant from the NP Division of the US Dept. of Energy. The JLEIC project requires 3 T superferric dipoles and quadrupoles for the half-cell arcs of its Ion Ring and Booster. A superferric design using NbTi cable-in-conduit conductor is being developed. A mockup winding has been completed, with the objectives to develop and evaluate the coil structure and the winding tooling and methods, and to measure errors in the position of each cable turn in the dipole body. The results of the mockup winding study are presented. The CIC design is now ready for construction and testing of a first model dipole.
	Poster MOPOB54 [1.147 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-MOPOB54
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUA1CO04	Simulation of Beam Dynamics in a Strong Focusing Cyclotron	251
	P.M. McIntyre, J. Gerity, A. Sattarov Texas A&M University, College Station, USA S. Assadi HiTek ESE LLC, Madison, USA K.E. Badgley Fermilab, Batavia, Illinois, USA N. Pogue LLNL, Livermore, California, USA
	Funding: This work is supported by the US Dept. of Energy Accelerator Stewardship Program. The strong-focusing cyclotron is an isochronous sector cyclotron in which slot-geometry superconducting half-cell cavities are used to provide sufficient energy gain per turn to fully separate orbits and superconducting quadrupoles are located in the aperture of each sector dipole to provide strong focusing and control betatron tune. The SFC offers the possibility to address the several effects that most limit beam current in a CW cyclotron: space charge, bunch-bunch interactions, resonance-crossing, and wake fields. Simulation of optical transport and beam dynamics entails several new challenges: the combined-function fields in the sectors must be properly treated in a strongly curving geometry, and the strong energy gain induces continuous mixing of horizontal betatron and synchrotron phase space. We present a systematic simulation of optical transport using modified versions of MAD-X and SYNERGIA. We report progress in introducing further elements that will set the stage for studying dynamics of high-current bunches.
	Slides TUA1CO04 [15.462 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-TUA1CO04
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPOB13	Simulations of Space Charge Neutralization in a Magnetized Electron Cooler	511
	J. Gerity, P.M. McIntyre Texas A&M University, College Station, USA D.L. Bruhwiler, C.C. Hall RadiaSoft LLC, Boulder, Colorado, USA V. Moens EPFL, Lausanne, Switzerland C.S. Park, G. Stancari Fermilab, Batavia, Illinois, USA
	Funding: This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under Award Number DE-SC0015212. Magnetized electron cooling at relativistic energies and Ampere scale current is essential to achieve the proposed ion luminosities in a future electron-ion collider (EIC). Neutralization of the space charge in such a cooler can significantly increase the magnetized dynamic friction and, hence, the cooling rate. The Warp framework is being used to simulate magnetized electron beam dynamics during and after the build up of neutralizing ions, via ionization of residual gas in the cooler. The design follows previous experiments at Fermilab as a verification case. We also discuss the relevance to EIC designs.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-TUPOB13
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Collider in the Sea: Vision for a 500 TeV World Laboratory

13

P.M. McIntyre, S.P. Bannert, J. Breitschopf, J. Gerity, J.N. Kellams, A. Sattarov
Texas A&M University, College Station, USA
S. Assadi
HiTek ESE LLC, Madison, USA
D. Chavez
DCI-UG, León, Mexico
N. Pogue
LLNL, Livermore, California, USA

A design is presented for a hadron collider in which the magnetic storage ring is configured as a circular pipeline, supported in neutral buoyancy in the sea at a depth of ~100 m. Each collider detector is housed in a bathysphere the size of the CMS hall at LHC, also neutral-buoyant. Each half-cell of the collider lattice is ~300 m long, housed in a single pipe that contains one dipole, one quadrupole, a correction package, and all umbilical connections. A choice of ~4 T dipole field, 2000 km circumference provides a collision energy of 700 TeV. Beam dynamics is dominated by synchrotron radiation damping, which sustains luminosity for >10 hours. Issues of radiation shielding and abort can be accommodated inexpensively. There are at least ten sites world-wide where the collider could be located, all near major urban centers. The paper summarizes several key issues; how to connect and disconnect half-cell segments of the pipeline at-depth using remote submersibles; how to maintain the lattice in the required alignment; provisions for the injector sequence.

Slides MOB2CO03 [3.440 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-MOB2CO03

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPOB54

Superferric Arc Dipoles for the Ion Ring and Booster of JLEIC

184

P.M. McIntyre, J. Breitschopf, T. Elliott, R. Garrison, J. Gerity, J.N. Kellams, A. Sattarov
Texas A&M University, College Station, USA
D. Chavez
DCI-UG, León, Mexico

Funding: This work was supported by a grant from the NP Division of the US Dept. of Energy.
The JLEIC project requires 3 T superferric dipoles and quadrupoles for the half-cell arcs of its Ion Ring and Booster. A superferric design using NbTi cable-in-conduit conductor is being developed. A mockup winding has been completed, with the objectives to develop and evaluate the coil structure and the winding tooling and methods, and to measure errors in the position of each cable turn in the dipole body. The results of the mockup winding study are presented. The CIC design is now ready for construction and testing of a first model dipole.

Poster MOPOB54 [1.147 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-MOPOB54

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUA1CO04

Simulation of Beam Dynamics in a Strong Focusing Cyclotron

251

P.M. McIntyre, J. Gerity, A. Sattarov
Texas A&M University, College Station, USA
S. Assadi
HiTek ESE LLC, Madison, USA
K.E. Badgley
Fermilab, Batavia, Illinois, USA
N. Pogue
LLNL, Livermore, California, USA

Funding: This work is supported by the US Dept. of Energy Accelerator Stewardship Program.
The strong-focusing cyclotron is an isochronous sector cyclotron in which slot-geometry superconducting half-cell cavities are used to provide sufficient energy gain per turn to fully separate orbits and superconducting quadrupoles are located in the aperture of each sector dipole to provide strong focusing and control betatron tune. The SFC offers the possibility to address the several effects that most limit beam current in a CW cyclotron: space charge, bunch-bunch interactions, resonance-crossing, and wake fields. Simulation of optical transport and beam dynamics entails several new challenges: the combined-function fields in the sectors must be properly treated in a strongly curving geometry, and the strong energy gain induces continuous mixing of horizontal betatron and synchrotron phase space. We present a systematic simulation of optical transport using modified versions of MAD-X and SYNERGIA. We report progress in introducing further elements that will set the stage for studying dynamics of high-current bunches.

Slides TUA1CO04 [15.462 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-TUA1CO04

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPOB13

Simulations of Space Charge Neutralization in a Magnetized Electron Cooler

511

J. Gerity, P.M. McIntyre
Texas A&M University, College Station, USA
D.L. Bruhwiler, C.C. Hall
RadiaSoft LLC, Boulder, Colorado, USA
V. Moens
EPFL, Lausanne, Switzerland
C.S. Park, G. Stancari
Fermilab, Batavia, Illinois, USA

Funding: This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under Award Number DE-SC0015212.
Magnetized electron cooling at relativistic energies and Ampere scale current is essential to achieve the proposed ion luminosities in a future electron-ion collider (EIC). Neutralization of the space charge in such a cooler can significantly increase the magnetized dynamic friction and, hence, the cooling rate. The Warp framework is being used to simulate magnetized electron beam dynamics during and after the build up of neutralizing ions, via ionization of residual gas in the cooler. The design follows previous experiments at Fermilab as a verification case. We also discuss the relevance to EIC designs.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-TUPOB13

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)