COOL2015 - List of Keywords (collider)

Paper	Title	Other Keywords	Page
MOWAUD03	Overview of Muon Cooling	emittance, factory, lattice, solenoid	1
	D.M. Kaplan Illinois Institute of Technology, Chicago, Illinois, USA
	Funding: DOE Muon cooling techniques are surveyed, along with a concise overview of relevant recent R&D.
	Slides MOWAUD03 [10.200 MB]
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MOPF05	A Cooling Storage Ring for an Electron-Ion Collider	electron, ion, simulation, booster	36
	J. Gerity, P.M. McIntyre Texas A&M University, College Station, USA
	Electron cooling offers performance advantages to the design of an electron-ion collider. A first design of a 6 GeV/u storage ring for the cooling of ions in MEIC is presented, along with some remarks on the particulars of electron cooling in this ring.
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MOPF07	Final Muon Ionization Cooling Channel using Quadrupole Doublets for Strong Focusing	emittance, quadrupole, sextupole, simulation	43
	J.G. Acosta, L.M. Cremaldi, T.L. Hart, S.J. Oliveros, D.J. Summers UMiss, University, Mississippi, USA D.V. Neuffer Fermilab, Batavia, Illinois, USA
	Considerable progress has been made in the design of muon ionization cooling for a collider. A 6D normalized emittance of 0.123 cubic mm has been achieved in simulation, almost a factor of a million in cooling. However, the 6D emittance required by a high luminosity muon collider is 0.044 cubic mm. We explore a final cooling channel composed of quadrupole doublets limited to 14 Tesla. Flat beams formed by a skew quadrupole triplet are used. The low beta regions, as low as 5 mm, produced by the strong focusing quadrupoles are occupied by dense, low Z absorbers that cool the beam. Work is in progress to keep muons with different path lengths in phase with the RF located between cells and to modestly enlarge quadrupole admittance. Calculations and individual cell simulations indicate that the final cooling needed may be possible. Full simulations are in progress. After cooling, emittance exchange in vacuum reduces the transverse emittance to 25 microns and lets the longitudinal emittance grow to 70 mm as needed by a collider. Septa slices a bunch into 17 parts. RF deflector cavities, as used in CLIC tests, form a 3.7 meter long bunch train. Snap bunch coalescence combines the 17 bunches into one in a 21 GeV ring in 55 microseconds.
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TUXAUD02	Project of Electron Cooler for NICA	electron, ion, solenoid, luminosity	82
	I.N. Meshkov, E.V. Ahmanova, A.G. Kobets, O. Orlov, V.I. Shokin, A.A. Sidorin, S. Yakovenko JINR, Dubna, Moscow Region, Russia M.N. Kokurkin, N.Yu. Lysov Allrussian Electrotechnical Institute, Moskow, Russia
	The problems of development of high energy electron coolers are discussed on the basis of the existing experience. Necessities of electron cooling application to NICA collider are considered and the project parameters of the electron cooler at NICA collider are presented. Electron cooler of the NICA Collider is under design and development of its elements at JINR. It will provide the formation of an intense ion beam and maintain it in the electron energy range of 0.5'2.5 MeV. To achieve the required energy of the electrons all the elements of the Cooler are placed in the tanks filled with sulfur hexafluoride (SF6) gas under pressure of 6 atm. For testing the Cooler elements the test bench «Recuperator» is used and upgraded. The results of testing of the prototypes of the Cooler elements and the present stage of the technical design of the Cooler are described in this paper.
	Slides TUXAUD02 [5.849 MB]
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TUPF01	Cooling for a High Luminosity 100 TeV Proton Antiproton Collider	antiproton, luminosity, proton, quadrupole	97
	S.J. Oliveros, J.G. Acosta, L.M. Cremaldi, D.J. Summers UMiss, University, Mississippi, USA
	A 10³⁴ luminosity 100 TeV proton-antiproton collider is explored. The cross section for many high mass states is 10x higher in p-pbar than p-p collisions. Antiquarks for production can come directly from an antiproton rather than indirectly from gluon splitting. The higher cross sections reduce the synchrotron radiation in superconducting magnets and the vacuum system, because lower beam currents can produce the same rare event rates. Events are also more central, allowing a shorter detector with less space between quadrupole triplets and a smaller beta twiss for higher luminosity. To keep up with the antiproton burn rate, a Fermilab-like antiproton source would be adapted to disperse the beam into 12 different momentum channels, using electrostatic septa, to increase antiproton momentum capture 12x. At Fermilab, antiprotons were stochastically cooled in one debuncher and one accumulator ring. Because the stochastic cooling time scales as the number of particles, 12 independent cooling systems would be used, each one with one debuncher/momentum equalizer ring and two accumulator rings. One electron cooling ring would follow the stochastic cooling rings. Finally antiprotons in the collider ring would be recycled during runs without leaving the collider ring, by joining them to new bunches with snap bunch coalescence and longitudinal synchrotron damping.
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TUPF02	Development of the Electron Cooling Simulation Program for MEIC	ion, electron, emittance, simulation	101
	H. Zhang, J. Chen, R. Li JLab, Newport News, Virginia, USA H. Huang, L. Luo ODU, Norfolk, Virginia, USA
	Funding: Work supported by the Department of Energy, Laboratory Directed Research and Development Funding, under Contract No. DE-AC05-06OR23177 In the medium energy electron ion collider (MEIC) project at Jefferson Lab, the traditional electron cooling technique is used to reduce the ion beam emittance at the booster ring, and to compensate the intrabeam scattering effect and maintain the ion beam emittance during collision at the collider ring. A DC cooler at the booster ring and a bunched beam cooler at the collider ring are proposed. To fulfil the requirements of the cooler design for MEIC, we are developing a new program, which allows us to simulate the following cooling scenarios: DC cooling to coasting ion beam, DC cooling to bunched ion beam, bunched cooling to bunched ion beam, and bunched cooling to coasting ion beam. The new program has been benchmarked with existing code in aspect of accuracy and efficiency. The new program will be adaptive to the modern multicore hardware. We will present our models and some simulation results.
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TUPF04	The MICE Demonstration of Ionization Cooling	emittance, lattice, solenoid, factory	104
	T.A. Mohayai IIT, Chicago, Illinois, USA
	Muon beams of low emittance can provide the intense, well known beams for physics of flavour at the Neutrino Factory and multiTev collisions at the Muon Collider. The international Muon Ionization Cooling Experiment (MICE) will demonstrate the technique proposed to reduce the phasespace volume of the muons. In an ionization cooling channel, the combination of energy loss by muons traversing an absorbing material with reacceleration by RF cavities reduces the transverse emittance of the beam (transverse cooling). The rebaselined MICE project will deliver a demonstration of ionization cooling by Sep 2017: a central Li-H absorber, two superconducting focus-coil modules and two 201 MHz singlecavity RF modules. The phase space of the muons entering and leaving the cooling cell will be measured by two solenoidal spectrometers. All the magnets for the ionization-cooling demonstration are available at RAL and the first singlecavity prototype was tested successfully in the MTA Area at Fermilab. The design of the cooling demonstration experiment, a summary of the performance of each of its components and the cooling performance of the configuration will be presented.
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TUPF09	Decoupling and Matching of Electron Cooling Section in the MEIC Ion Collider Ring	ion, electron, solenoid, coupling	116
	G.H. Wei, F. Lin, V.S. Morozov, H. Zhang JLab, Newport News, Virginia, USA
	To get a luminosity level of 10³³ cm^-2 s^-1 at all design points of the MEIC, small transverse emittance is necessary in the ion collider ring, which is achieved by an electron cooling. And for the electron cooling, two solenoids are used to create a cooling environment of temperature exchange between electron beam and ion beam. However, the solenoids can also cause coupling and matching problem for the optics of the MEIC ion ring lattice. Both of them will have influences on the IP section and other areas, especially for the beam size, Twiss parameters, and nonlinear effects. A symmetric and flexible method is used to deal with these problems. With this method, the electron cooling section is merged into the ion ring lattice elegantly.
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THYAUD02	Front End and HFOFO Snake for a Muon Facility	solenoid, target, factory, proton	150
	D.V. Neuffer, Y.I. Alexahin Fermilab, Batavia, Illinois, USA
	Funding: Work supported by Contract No. De-AC02-07CH11359 with the U. S. Department of Energy A neutrino factory or muon collider requires the capture and cooling of a large number of muons. Scenarios for capture, bunching, phase-energy rotation and initial cooling of muonss produced from a proton source target have been developed for neutrino factory and Muon Collider designs. The baseline scenarios requires a drift section from the target, a bunching section and a phase-energy rotation section leading into the cooling channel. The currently preferred cooling channel design is an 'HFOFO Snake' configuration that cools both μ+ and μ- transversely and longitudinally. The status of the design is presented and variations are discussed.
	Slides THYAUD02 [4.191 MB]
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FRWAUD01	Stochastic Cooling Experiments at Nuclotron and Application to NICA Collider	pick-up, kicker, experiment, software	165
	N. Shurkhno, A.O. Sidorin, G.V. Trubnikov JINR, Dubna, Moscow Region, Russia T. Katayama GSI, Darmstadt, Germany R. Stassen FZJ, Jülich, Germany
	Stochastic cooling is obligatory for the NICA accelerator facility that is presently under development at JINR, Russia. Cooling will work with the high-intensity bunched beams in the 3-4.5 GeV energy range; all three dimensions will be treated simultaneously. The preparatory experimental work on stochastic cooling is carried out at accelerator Nuclotron (JINR) since 2010. During this work hardware solutions and automation techniques for system adjustment have been worked out and tested. Based on the gained experience the overall design of the NICA stochastic cooling system was also developed. The report describes the results of cooling experiments at Nuclotron, the developed adjustment automation techniques and presents the design of the NICA stochastic cooling system.
	Slides FRWAUD01 [2.401 MB]
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Paper

Title

Other Keywords

Page

MOWAUD03

Overview of Muon Cooling

emittance, factory, lattice, solenoid

1

D.M. Kaplan
Illinois Institute of Technology, Chicago, Illinois, USA

Funding: DOE
Muon cooling techniques are surveyed, along with a concise overview of relevant recent R&D.

Slides MOWAUD03 [10.200 MB]

Export •

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

MOPF05

A Cooling Storage Ring for an Electron-Ion Collider

electron, ion, simulation, booster

36

J. Gerity, P.M. McIntyre
Texas A&M University, College Station, USA

Electron cooling offers performance advantages to the design of an electron-ion collider. A first design of a 6 GeV/u storage ring for the cooling of ions in MEIC is presented, along with some remarks on the particulars of electron cooling in this ring.

Export •

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

MOPF07

Final Muon Ionization Cooling Channel using Quadrupole Doublets for Strong Focusing

emittance, quadrupole, sextupole, simulation

43

J.G. Acosta, L.M. Cremaldi, T.L. Hart, S.J. Oliveros, D.J. Summers
UMiss, University, Mississippi, USA
D.V. Neuffer
Fermilab, Batavia, Illinois, USA

Considerable progress has been made in the design of muon ionization cooling for a collider. A 6D normalized emittance of 0.123 cubic mm has been achieved in simulation, almost a factor of a million in cooling. However, the 6D emittance required by a high luminosity muon collider is 0.044 cubic mm. We explore a final cooling channel composed of quadrupole doublets limited to 14 Tesla. Flat beams formed by a skew quadrupole triplet are used. The low beta regions, as low as 5 mm, produced by the strong focusing quadrupoles are occupied by dense, low Z absorbers that cool the beam. Work is in progress to keep muons with different path lengths in phase with the RF located between cells and to modestly enlarge quadrupole admittance. Calculations and individual cell simulations indicate that the final cooling needed may be possible. Full simulations are in progress. After cooling, emittance exchange in vacuum reduces the transverse emittance to 25 microns and lets the longitudinal emittance grow to 70 mm as needed by a collider. Septa slices a bunch into 17 parts. RF deflector cavities, as used in CLIC tests, form a 3.7 meter long bunch train. Snap bunch coalescence combines the 17 bunches into one in a 21 GeV ring in 55 microseconds.

Export •

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

TUXAUD02

Project of Electron Cooler for NICA

electron, ion, solenoid, luminosity

82

I.N. Meshkov, E.V. Ahmanova, A.G. Kobets, O. Orlov, V.I. Shokin, A.A. Sidorin, S. Yakovenko
JINR, Dubna, Moscow Region, Russia
M.N. Kokurkin, N.Yu. Lysov
Allrussian Electrotechnical Institute, Moskow, Russia

The problems of development of high energy electron coolers are discussed on the basis of the existing experience. Necessities of electron cooling application to NICA collider are considered and the project parameters of the electron cooler at NICA collider are presented. Electron cooler of the NICA Collider is under design and development of its elements at JINR. It will provide the formation of an intense ion beam and maintain it in the electron energy range of 0.5'2.5 MeV. To achieve the required energy of the electrons all the elements of the Cooler are placed in the tanks filled with sulfur hexafluoride (SF6) gas under pressure of 6 atm. For testing the Cooler elements the test bench «Recuperator» is used and upgraded. The results of testing of the prototypes of the Cooler elements and the present stage of the technical design of the Cooler are described in this paper.

Slides TUXAUD02 [5.849 MB]

Export •

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

TUPF01

Cooling for a High Luminosity 100 TeV Proton Antiproton Collider

antiproton, luminosity, proton, quadrupole

97

S.J. Oliveros, J.G. Acosta, L.M. Cremaldi, D.J. Summers
UMiss, University, Mississippi, USA

A 10³⁴ luminosity 100 TeV proton-antiproton collider is explored. The cross section for many high mass states is 10x higher in p-pbar than p-p collisions. Antiquarks for production can come directly from an antiproton rather than indirectly from gluon splitting. The higher cross sections reduce the synchrotron radiation in superconducting magnets and the vacuum system, because lower beam currents can produce the same rare event rates. Events are also more central, allowing a shorter detector with less space between quadrupole triplets and a smaller beta twiss for higher luminosity. To keep up with the antiproton burn rate, a Fermilab-like antiproton source would be adapted to disperse the beam into 12 different momentum channels, using electrostatic septa, to increase antiproton momentum capture 12x. At Fermilab, antiprotons were stochastically cooled in one debuncher and one accumulator ring. Because the stochastic cooling time scales as the number of particles, 12 independent cooling systems would be used, each one with one debuncher/momentum equalizer ring and two accumulator rings. One electron cooling ring would follow the stochastic cooling rings. Finally antiprotons in the collider ring would be recycled during runs without leaving the collider ring, by joining them to new bunches with snap bunch coalescence and longitudinal synchrotron damping.

Export •

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

TUPF02

Development of the Electron Cooling Simulation Program for MEIC

ion, electron, emittance, simulation

101

H. Zhang, J. Chen, R. Li
JLab, Newport News, Virginia, USA
H. Huang, L. Luo
ODU, Norfolk, Virginia, USA

Funding: Work supported by the Department of Energy, Laboratory Directed Research and Development Funding, under Contract No. DE-AC05-06OR23177
In the medium energy electron ion collider (MEIC) project at Jefferson Lab, the traditional electron cooling technique is used to reduce the ion beam emittance at the booster ring, and to compensate the intrabeam scattering effect and maintain the ion beam emittance during collision at the collider ring. A DC cooler at the booster ring and a bunched beam cooler at the collider ring are proposed. To fulfil the requirements of the cooler design for MEIC, we are developing a new program, which allows us to simulate the following cooling scenarios: DC cooling to coasting ion beam, DC cooling to bunched ion beam, bunched cooling to bunched ion beam, and bunched cooling to coasting ion beam. The new program has been benchmarked with existing code in aspect of accuracy and efficiency. The new program will be adaptive to the modern multicore hardware. We will present our models and some simulation results.

Export •

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

TUPF04

The MICE Demonstration of Ionization Cooling

emittance, lattice, solenoid, factory

104

T.A. Mohayai
IIT, Chicago, Illinois, USA

Muon beams of low emittance can provide the intense, well known beams for physics of flavour at the Neutrino Factory and multiTev collisions at the Muon Collider. The international Muon Ionization Cooling Experiment (MICE) will demonstrate the technique proposed to reduce the phasespace volume of the muons. In an ionization cooling channel, the combination of energy loss by muons traversing an absorbing material with reacceleration by RF cavities reduces the transverse emittance of the beam (transverse cooling). The rebaselined MICE project will deliver a demonstration of ionization cooling by Sep 2017: a central Li-H absorber, two superconducting focus-coil modules and two 201 MHz singlecavity RF modules. The phase space of the muons entering and leaving the cooling cell will be measured by two solenoidal spectrometers. All the magnets for the ionization-cooling demonstration are available at RAL and the first singlecavity prototype was tested successfully in the MTA Area at Fermilab. The design of the cooling demonstration experiment, a summary of the performance of each of its components and the cooling performance of the configuration will be presented.

Export •

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

TUPF09

Decoupling and Matching of Electron Cooling Section in the MEIC Ion Collider Ring

ion, electron, solenoid, coupling

116

G.H. Wei, F. Lin, V.S. Morozov, H. Zhang
JLab, Newport News, Virginia, USA

To get a luminosity level of 10³³ cm^-2 s^-1 at all design points of the MEIC, small transverse emittance is necessary in the ion collider ring, which is achieved by an electron cooling. And for the electron cooling, two solenoids are used to create a cooling environment of temperature exchange between electron beam and ion beam. However, the solenoids can also cause coupling and matching problem for the optics of the MEIC ion ring lattice. Both of them will have influences on the IP section and other areas, especially for the beam size, Twiss parameters, and nonlinear effects. A symmetric and flexible method is used to deal with these problems. With this method, the electron cooling section is merged into the ion ring lattice elegantly.

Export •

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

THYAUD02

Front End and HFOFO Snake for a Muon Facility

solenoid, target, factory, proton

150

D.V. Neuffer, Y.I. Alexahin
Fermilab, Batavia, Illinois, USA

Funding: Work supported by Contract No. De-AC02-07CH11359 with the U. S. Department of Energy
A neutrino factory or muon collider requires the capture and cooling of a large number of muons. Scenarios for capture, bunching, phase-energy rotation and initial cooling of muonss produced from a proton source target have been developed for neutrino factory and Muon Collider designs. The baseline scenarios requires a drift section from the target, a bunching section and a phase-energy rotation section leading into the cooling channel. The currently preferred cooling channel design is an 'HFOFO Snake' configuration that cools both μ+ and μ- transversely and longitudinally. The status of the design is presented and variations are discussed.

Slides THYAUD02 [4.191 MB]

Export •

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

FRWAUD01

Stochastic Cooling Experiments at Nuclotron and Application to NICA Collider

pick-up, kicker, experiment, software

165

N. Shurkhno, A.O. Sidorin, G.V. Trubnikov
JINR, Dubna, Moscow Region, Russia
T. Katayama
GSI, Darmstadt, Germany
R. Stassen
FZJ, Jülich, Germany

Stochastic cooling is obligatory for the NICA accelerator facility that is presently under development at JINR, Russia. Cooling will work with the high-intensity bunched beams in the 3-4.5 GeV energy range; all three dimensions will be treated simultaneously. The preparatory experimental work on stochastic cooling is carried out at accelerator Nuclotron (JINR) since 2010. During this work hardware solutions and automation techniques for system adjustment have been worked out and tested. Based on the gained experience the overall design of the NICA stochastic cooling system was also developed. The report describes the results of cooling experiments at Nuclotron, the developed adjustment automation techniques and presents the design of the NICA stochastic cooling system.

Slides FRWAUD01 [2.401 MB]

Export •

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