Paper | Title | Page |
---|---|---|
TUOBA02 | ER@CEBAF - A High Energy, Multi-pass Energy Recovery Experiment at CEBAF | 1022 |
|
||
Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy. A high-energy, multiple-pass energy recovery (ER) experiment proposal, using CEBAF, is in preparation by a JLab-BNL collaboration. The experiment will be proposed in support of the electron-ion collider project (EIC) R&D going on at BNL. This new experiment extends the 2003, 1-pass, 1 GeV CEBAF-ER demonstration into a range of energy and recirculation passes commensurate with BNL's anticipated linac-ring EIC parameters. The experiment will study ER and recirculating beam dynamics in the presence of synchrotron radiation, provide opportunity to develop and test multiple-beam diagnostic instrumentation, and can also probe BBU limitations. This paper gives an overview of the ER@CEBAF project, its context and preparations. |
||
![]() |
Slides TUOBA02 [1.936 MB] | |
DOI • | reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUOBA02 | |
Export • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |
TUPMW038 | RHIC Operation with Asymmetric Collisions in 2015 | 1527 |
|
||
Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy. Collisions with beams of highly asymmetric rigidities (proton-Gold and proton-Aluminum) were provided for the RHIC physics programs in 2015. Magnets were moved for the first time in RHIC prior to the run to accommodate the asymmetric beam trajectories during acceleration and at store. A special ramping scheme was designed to keep the revolution frequencies of the beams in the two rings equal. The unique operational experience of the asymmetric run will be reviewed. |
||
DOI • | reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMW038 | |
Export • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |
TUPOY044 | Energy Efficiency of High Power Accelerators for ADS Applications | 2001 |
|
||
Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy. One important issue identified by the 2014 comprehensive nuclear fuel cycle Evaluation & Screening report* that was chartered by the US Department of Energy was the impact of the electricity required to operate the accelerator on the overall efficiency of an Accelerator Driven System (ADS).The objective of this paper is to contribute some understanding regarding that issue. Then, by looking at several options of existing and projected accelerator technologies for ADS, we evaluate the impact of the technology choice on the efficiency of a conventional ADS facility, in view of investigating the limitations and where there is room for improvement. * R. Wigeland et al, Nuclear fuel cycle evaluation and screening'final report: Appendix B, Comprehensive set of fuel cycle options. Idaho National Laboratory Technical Report INL/EXT-14-31465 (2014). |
||
DOI • | reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPOY044 | |
Export • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |
TUPOY045 | Effect of the Beam Time Structure on the Neutronics of an Accelerator Driven Subcritical Reactor | 2004 |
|
||
Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy. When designing a high power accelerator for an ADSR, it is important to optimize the beam parameters to be compatible with the steady state character of the reactor operation and to define an adequate and safe startup procedure. In this study we investigate the impact of the beam time structure on the kinetic behavior of the sub-critical core and derive a general relationship between the time evolution of the neutron population and the proton beam. |
||
DOI • | reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPOY045 | |
Export • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |
WEZA01 | RHIC Performance with Stochastic Cooling for Ions and Head-on Beam-beam Compensation for Protons | 2055 |
|
||
Funding: Work supported by U.S. DOE under contract No DE-AC02-98CH10886 with the U.S. Department of Energy. The Relativistic Heavy Ion Collider (RHIC) has two main operating modes with heavy ions and polarized protons respectively. In addition to a continuous increase in the bunch intensity in all modes, two major new systems were completed recently mitigating the main luminosity limit and leading to significant performance improvements. For heavy ion operation stochastic cooling mitigates the effects of intrabeam scattering, and for polarized proton operation head-on beam-beam compensation mitigated the beam-beam effect. We present the performance increases with these upgrades for heavy ions and polarized protons, as well as an overview of all operating modes past and planned. |
||
![]() |
Slides WEZA01 [12.687 MB] | |
DOI • | reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEZA01 | |
Export • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |
WEPMW011 | Stable Spin Direction Investigations in RHIC | 2442 |
|
||
Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy. Beam and spin dynamics investigations are part of the preparations and studies regarding RHIC collider runs, they are part as well of the efforts dedicated to improving stored beam polarization, and in view of the eRHIC EIC project. Some recent studies and their outcomes are discussed. |
||
DOI • | reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPMW011 | |
Export • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |
WEPMW027 | The ERL-based Design of Electron-Hadron Collider eRHIC | 2482 |
|
||
Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy. Recent developments of the ERL-based design of future high luminosity electron-hadron collider eRHIC focused on balancing technological risks present in the design versus the design cost. As a result a lower risk design has been adopted at moderate cost increase. The modifications include a change of the main linac RF frequency, reduced number of SRF cavity types and modified electron spin transport using a spin rotator. A luminosity-staged approach is being explored with a Nominal design (L ~ 1033 cm-2 s-1) that employs reduced electron current and could possibly be based on classical electron cooling, and then with the Ultimate design (L > 1034 cm-2 s-1) that uses higher electron current and an innovative cooling technique (CeC). The paper describes the recent design modifications, and presents the full status of the eRHIC ERL-based design. |
||
DOI • | reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPMW027 | |
Export • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |
WEPMW044 | Start-to-End Simulation of eRHIC ERL | 2535 |
|
||
Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy. The ERL-ring eRHIC adopts the electron accelerator design of a multi-pass energy recovery linac (ERL), with fixed field alternating gradient (FFAG) recirculating passes. To ensure the beam quality in the accelerating and decelerating stage and the energy recovery efficiency, detailed start-to-end simulation is required to evaluate the various beam dynamics effects, such as synchrotron radiation, wake fields, coherent synchrotron radiation. In this paper, we present the eRHIC ERL start-to-end simulation strategy with various simulation codes and the current status. |
||
DOI • | reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPMW044 | |
Export • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |