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We analyze beam-induced depolarizing effects in the hydrogen jet target (HJET) at the Relativistic Heavy Ion Collider (RHIC) that has been used for absolute hadron beam polarimetry and shall be employed at the Electron-Ion Collider (EIC).…

Electromagnetic interactions between colliding heavy ions at the Large Hadron Collider (LHC) at CERN will give rise to localized beam losses that may quench superconducting magnets, apart from contributing significantly to the luminosity…

Accelerator Physics · Physics 2009-08-20 R. Bruce , D. Bocian , S. Gilardoni , J. M. Jowett

We compare the transport properties of a well-characterized hydrogen plasma for low and high current ion beams. The energy-loss of low current beams can be well understood, within the framework of current stopping power models. However, for…

This talk gives a very short overview of some of the important physical phenomena observed at the Relativistic Heavy Ion Collider (RHIC). The emphasis is put on the multiplicities, hard probes and the properties of the initial state.

High Energy Physics - Phenomenology · Physics 2007-09-13 Anna M. Stasto

Beam-beam interactions pose substantial challenges in the design and operation of circular colliders, significantly affecting their performance. In particular, the weak-strong simulation approach is pivotal for investigating single-particle…

Accelerator Physics · Physics 2024-06-21 Derong Xu , Vasiliy S. Morozov , David Sagan , Yue Hao , Yun Luo

Several proposals exist for future circular electron-positron colliders designed for precise measurements of the Higgs boson characteristics and electroweak processes. At very high energies, synchrotron radiation of the particles in a…

Accelerator Physics · Physics 2015-06-17 A. Bogomyagkov , E. Levichev , D. Shatilov

The University of Maryland Electron Ring (UMER) has operated traditionally in the regime of strong space-charge dominated beam transport, but small-current beams are desirable to significantly reduce the direct (incoherent) space-charge…

Accelerator Physics · Physics 2018-10-11 S. Bernal , B. Beaudoin , L. Dovlatyan , S. Ehrenstein , I. Haber , R. A. Kishek , E. Montgomery , D. Sutter

Using a hybrid (viscous hydrodynamics + hadronic cascade) framework, we model the bulk dynamical evolution of relativistic heavy-ion collisions at Relativistic Heavy Ion Collider (RHIC) Beam Energy Scan (BES) collision energies, including…

Nuclear Theory · Physics 2018-03-14 Chun Shen , Gabriel Denicol , Charles Gale , Sangyong Jeon , Akihiko Monnai , Bjoern Schenke

First thoughts on the design of the beam vacuum system for the High Energy LHC (HE-LHC) are given with a particular focus on the impact of the synchrotron radiation. In the HE-LHC, the vacuum dynamic effects induced by the circulating beams…

Accelerator Physics · Physics 2011-08-09 J. M. Jimenez

The operation of high-energy and high-intensity particle accelerators inevitably leads to the loss of a fraction of beam particles, either through controlled processes or accidental events. This article builds on a first lecture on…

Accelerator Physics · Physics 2026-04-27 Giuseppe Lerner

Recent experimental results obtained at the Relativistic Heavy-Ion Collider (RHIC) will be discussed. Investigations of different nucleus-nucleus collisions in recent years focus on two main tasks, namely, the detailed study of sQGP…

Nuclear Experiment · Physics 2015-08-05 V. A. Okorokov

We report the first observations of beam losses due to bound-free pair production at the interaction point of a heavy-ion collider. This process is expected to be a major luminosity limit for the Large Hadron Collider (LHC) when it operates…

Accelerator Physics · Physics 2008-11-26 R. Bruce , A. Drees , W. Fischer , S. Gilardoni , J. M. Jowett , S. R. Klein , S. Tepikian

For booster synchrotrons, like the SIS at GSI, space charge is one of the main intensity limitations. At injection energy the space charge induced tune spreads in booster synchrotrons are large, reaching up to 0.5 and the ramping times are…

Accelerator Physics · Physics 2017-05-05 Oliver Boine-Frankenheim , William D. Stem

A new era has started in the field of relativistic heavy-ion physics with lead beams delivered by the Large Hadron Collider (LHC) in November 2010. In this proceedings I highlight the main results from experimental measurements with Pb-Pb…

Nuclear Experiment · Physics 2011-09-09 Ilya Selyuzhenkov

In ring-ring colliders, the collision frequency determines the bunch structures, e.g. the time between the bunches in both rings should be identical. Because of relatively low relativistic speed of the hadron beam in sub-TeV hadron-hadron-…

Accelerator Physics · Physics 2015-06-17 Yue Hao , Vladimir N. Litvinenko , Vadim Ptitsyn

For the successful generation of ion-beam-driven high energy density matter and heavy ion fusion energy, intense ion beams must be transported and focused onto a target with small spot size. One of the successful approaches to achieve this…

Flat-beam transforms (FBTs) provide a technique for controlling the emittance partitioning between the beam's two transverse dimensions. To date, nearly all FBT studies have been in regimes where the beam's own space-charge effects can be…

Accelerator Physics · Physics 2021-03-01 Scott B. Moroch , Timothy W. Koeth , Bruce E. Carlsten

FCC-ee, the lepton version of the Future Circular Collider (FCC), is a 100 Km future machine under study to be built at CERN. It acquires two experiments with a highest beam energy of 182.5 GeV. FCC-ee aims to operate at four different…

Accelerator Physics · Physics 2019-04-24 Dima El Khechen , Katsunobu Oide , Frank Zimmermann

The standard approach in the conventional theory of intrabeam scattering (IBS) is based on the analysis of binary Coulomb collisions of charged particles in the beam. This picture is only partially true: in reality, a given particle…

Accelerator Physics · Physics 2025-04-03 Gennady Stupakov

With the aim of understanding the phase structure of nuclear matter created in high-energy nuclear collisions at finite baryon density, a beam energy scan program has been carried out at Relativistic Heavy Ion Collider (RHIC). In this…

Nuclear Experiment · Physics 2020-04-03 Xiaofeng Luo , Shusu Shi , Nu Xu , Yifei Zhang