Electron cooling for RHIC

Ben‐Zvi, I.; Malitsky, N.; Fedotov, A.; Favale, A.; Merminga, L.; Smirnov, Alexander V.; Russo, Thomas; Wang, G.; Derbenev, Ya. S.; Delayen, J. R.; Colé,; Zhao, Yongtao; Hershcovitch, A.; Schultheiss, T.; Abell, Dan T.; Johnson, Paul R.; Montag, C.; Burov, A.; Mirabella, K.A.M.; Phillips, H.L.; Lambiase, R.; Sidorin, Anatoly; Connolly, R.; Scaduto, J.; Beavis, D.; Burger, A.; Sekutowicz, J.; Calaga, R.; Kayran, D.; Shatunov, Yu. M.; Parzen, G.; Nicoletti, T.; Koop, I. A.; Barton, D. S.; Smith, K.; Todd, A.M.M.; Rank, J.; Chang, X.; Wu, Kuo-Chen; Kewisch, J.; Zaltsman, A.; Parkhomchuk, V. V.; Hseuh, H.C.; MacKay, W. W.; Burrill, A.; Skrinsky, A.N.; Meng, W.; Fischer, W.; Blaskiewicz, M.; Yakimenko, V.; Brennan, J.M.; Trbojević, D.; Troubnikov, G.; Bruhwiler, David L.; Pate, D.; Litvinenko, Vladimir; Rathke, J.; Holmes, Douglas; Nagaitsev, Sergei; Cameron, P.; Funk, L. W.; Harrison, M.; Wei, John; Williams, N.; Oerter, B.; Bluem, H.; Rao, T.; Мешков, И. Н.; McIntyre, G.; Kneisel, P.; Gassner, D.; Mahler, G.; Eidelman, Yu.I.; Roser, T.; Preble, J.; Hahn, H.; Nehring, T.

doi:10.1109/pac.2001.987428

Cited by 7 publications

(5 citation statements)

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“…HPC simulations supported by the DOE Office of Nuclear Physics Small business Innovative Research program and now also by SciDAC were instrumental in design modifications of the proposed electron cooling system for the RHIC that led to cost reductions estimated in the tens of millions of dollars. Rather than using a technically challenging high-field solenoid magnet and 20 nC magnetized electron bunches (Ben-Zvi et al 2005), the new design specified conventional undulator magnet technology with 5 nC electron bunches (Ben-Zvi et al 2007). The initial effort established confidence in the new algorithms implemented within the parallel Versatile Object-oriented Relativistic Plasma Analysis with Lasers (VORPAL) framework, and contributed directly to the solenoid-based design.…”

Section: Past Experiences and Current Capabilitiesmentioning

confidence: 99%

Scientific Challenges for Understanding the Quantum Universe

Khaleel¹

2009

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The scientific grand challenges for this field are described in several publications, including the High Energy Physics Advisory Panel's (HEPAP) Quantum Universe report and the P5 subcommittee's Long Range Plan for Particle Physics in the United States. From these, the following fundamental questions are posed: What are the main features of physics Beyond the Standard Model? These can be sought by exploring physics at high energy using the Large Hadron Collider (LHC), by seeking small departures from predictions made assuming Standard Model physics for interactions at lower energy, or by exploring physics with neutrinos. What is the identity of dark matter and how does large scale structure develop in the expanding universe? The prime dark matter candidate is a supersymmetric particle, but less massive particles called axions may also be involved. The primordial fluctuations out of which contemporary largescale structure grew may provide a window on fundamental processes occurring during the epoch of inflation. What are the empirical properties of dark energy and what do they imply about its nature? Present evidence involving observations of supernova explosions and the growth of perturbations in the expanding universe is consistent with it having the properties of Einstein's cosmological constant.Departures from this behavior may signify the presence of new physics operating over cosmological scales. What are the reasons for and implications of neutrino masses? The measured properties of neutrinos provide an existence proof for important physics Beyond the Standard Model (BSM) but may also lead to an explanation of why there is a net preponderance of matter over anti-matter. Astrophysical arguments also contribute to the answer. Are there extra dimensions beyond the three spatial and single temporal dimensions familiar from everyday experience? These may have tiny length scales as suggested by string theory or may have macroscopic scales that can lead to a weakening of the law of gravity. How do Nature's particle accelerators operate in extreme environments? Ultra high energy cosmic rays are accelerated by cosmic sources possibly associated with massive black holes to energies as high as 1 ZeV. When these cosmic rays hit the Earth's atmosphere, they do so with center of momentum energies in excess of 100 TeV. While we can observe cataclysmic events such as a supernova explosion or the collapse of a massive star into a black hole from a vast distance, these involve phenomena that can never be reproduced in a terrestrial laboratory. However, it becomes increasingly possible to recreate these conditions in a digital universe where important questions can be asked and alternatives explored.The planning and design of the International Linear Collider (ILC) is critical for the next step in high energy physics. How can we be certain that this expensive machine will work when it is turned on? Instead of building a series of increasingly costly prototypes, accelerator physicists turn with increasing sophistication...

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Section: Past Experiences and Current Capabilitiesmentioning

confidence: 99%

Scientific Challenges for Understanding the Quantum Universe

Khaleel¹

2009

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“…Brookhaven National Lab has completed a conceptual design of a beam cooler [53]. This device originally had average current similar to the IR DEMO FEL.…”

Section: Applications To Colliding-beam Machinesmentioning

confidence: 99%

Recirculated and Energy Recovered Linacs

Krafft

2004

Physics and Technology of Linear Accelerator Systems

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Linacs that are recirculated share many characteristics with ordinary linacs, including the ability to accelerate electron beams from an injector to high energy with relatively little (normalized) emittance growth and the ability to deliver ultrashort bunch duration pulses to users. When such linacs are energy recovered, the additional possibility of accelerating very high average beam current arises. Because this combination of beam properties is not possible from either a conventional linac, or from storage rings where emittance and pulse length are set by the equilibrium between radiation damping and quantum excitation of oscillations about the closed orbit, energy recovered linacs are being considered for an increasing variety of applications. These possibilities extend from high power free-electron lasers and recirculated linac light sources, to electron coolers for high energy colliders or actual electronion colliding-beam machines based on an energy recovered linac for the electrons.

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“…A detailed discussion of the electron cooling of RHIC can be found in a companion paper [1]. With electron cooling the beam emittance can be reduced and maintained throughout the store and the luminosity increased until non-linear effects of the two colliding beams on each other limit any further increase (beam-beam limit).…”

Section: Methodsmentioning

confidence: 99%

Upgrading RHIC for higher luminosity

MacKay

Ben‐Zvi²,

Brennan³

et al.

PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)

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While RHIC has only just started running for its heavy ion physics program, in the first run last summer, we achieved 10% of the design luminosity. In this paper we discuss plans for increasing the luminosity by a factor of 35 beyond the nominal design. A factor of 4 should be straightforward by doubling the number of bunches per ring and squeezing the β* from 2 to 1 m at selected interaction points. An additional factor of 8 to 10 could be possible by using electron cooling to counteract intrabeam scattering and reduce emittances of the beams.

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Electron cooling for RHIC

Cited by 7 publications

References 0 publications

Scientific Challenges for Understanding the Quantum Universe

Scientific Challenges for Understanding the Quantum Universe

Recirculated and Energy Recovered Linacs

Upgrading RHIC for higher luminosity

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