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  1. Article ; Online: CBETA: First Multipass Superconducting Linear Accelerator with Energy Recovery.

    Bartnik, A / Banerjee, N / Burke, D / Crittenden, J / Deitrick, K / Dobbins, J / Gulliford, C / Hoffstaetter, G H / Li, Y / Lou, W / Quigley, P / Sagan, D / Smolenski, K / Berg, J S / Brooks, S / Hulsart, R / Mahler, G / Meot, F / Michnoff, R /
    Peggs, S / Roser, T / Trbojevic, D / Tsoupas, N / Miyajima, T

    Physical review letters

    2020  Volume 125, Issue 4, Page(s) 44803

    Abstract: Energy recovery has been achieved in a multipass linear accelerator, demonstrating a technology for more compact particle accelerators operating at higher currents and reduced energy consumption. Energy delivered to the beam during the first four passes ... ...

    Abstract Energy recovery has been achieved in a multipass linear accelerator, demonstrating a technology for more compact particle accelerators operating at higher currents and reduced energy consumption. Energy delivered to the beam during the first four passes through the accelerating structure was recovered during four subsequent decelerating passes. High-energy efficiency was achieved by the use of superconducting accelerating cavities and permanent magnets. The fixed-field alternating-gradient optical system used for the return loop successfully transported electron bunches of 42, 78, 114, and 150 MeV in a common vacuum chamber. This new kind of accelerator, an eight-pass energy recovery linac, has the potential to accelerate much higher current than existing linear accelerators while maintaining small beam dimensions and consuming much less energy per electron.
    Language English
    Publishing date 2020-08-14
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.125.044803
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Overcoming depolarizing resonances with dual helical partial Siberian snakes.

    Huang, H / Ahrens, L A / Bai, M / Brown, K / Courant, E D / Gardner, C / Glenn, J W / Lin, F / Luccio, A U / Mackay, W W / Okamura, M / Ptitsyn, V / Roser, T / Takano, J / Tepikian, S / Tsoupas, N / Zelenski, A / Zeno, K

    Physical review letters

    2007  Volume 99, Issue 15, Page(s) 154801

    Abstract: Acceleration of polarized protons in the energy range of 5 to 25 GeV is challenging. In a medium energy accelerator, the depolarizing spin resonances are strong enough to cause significant polarization loss but full Siberian snakes cause intolerably ... ...

    Abstract Acceleration of polarized protons in the energy range of 5 to 25 GeV is challenging. In a medium energy accelerator, the depolarizing spin resonances are strong enough to cause significant polarization loss but full Siberian snakes cause intolerably large orbit excursions and are also not feasible since straight sections usually are too short. Recently, two helical partial Siberian snakes with double pitch design have been installed in the Brookhaven Alternating Gradient Synchrotron (AGS). With a careful setup of optics at injection and along the energy ramp, this combination can eliminate the intrinsic and imperfection depolarizing resonances otherwise encountered during acceleration to maintain a high intensity polarized beam in medium energy synchrotrons. The observation of partial snake resonances of higher than second order will also be described.
    Language English
    Publishing date 2007-10-12
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.99.154801
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Book ; Online: The Cornell-BNL FFAG-ERL Test Accelerator

    Bazarov, Ivan / Dobbins, John / Dunham, Bruce / Hoffstaetter, Georg / Mayes, Christopher / Patterson, Ritchie / Sagan, David / Ben-Zvi, Ilan / Berg, Scott / Blaskiewicz, Michael / Brooks, Stephen / Brown, Kevin / Fischer, Wolfram / Hao, Yue / Meng, Wuzheng / Méot, François / Minty, Michiko / Peggs, Stephen / Ptitsin, Vadim /
    Roser, Thomas / Thieberger, Peter / Trbojevic, Dejan / Tsoupas, Nick

    White Paper

    2015  

    Abstract: The Cornell-BNL FFAG-ERL Test Accelerator (C$\beta$) will comprise the first ever Energy Recovery Linac (ERL) based on a Fixed Field Alternating Gradient (FFAG) lattice. In particular, we plan to use a Non Scaling FFAG (NS-FFAG) lattice that is very ... ...

    Abstract The Cornell-BNL FFAG-ERL Test Accelerator (C$\beta$) will comprise the first ever Energy Recovery Linac (ERL) based on a Fixed Field Alternating Gradient (FFAG) lattice. In particular, we plan to use a Non Scaling FFAG (NS-FFAG) lattice that is very compact and thus space- and cost- effective, enabling multiple passes of the electron beam in a single recirculation beam line, using the superconducting RF (SRF) linac multiple times. The FFAG-ERL moves the cost optimized linac and recirculation lattice to a dramatically better optimum. The prime accelerator science motivation for C$\beta$ is proving that the FFAG-ERL concept works. This is an important milestone for the Brookhaven National Laboratory (BNL) plans to build a major Nuclear Physics facility, eRHIC, based on producing 21 GeV electron beams to collide with the RHIC ion beams. A consequence of the C$\beta$ work would be the availability of significantly better, cost-effective, compact CW high-brightness electron beams for a plethora of scientific investigations and applications, such as X-ray sources, dark-matter and dark-energy searches, and industrial high-power Free-Electron Laser (FEL) applications. C$\beta$ brings together the resources and expertise of a large DOE National Laboratory, BNL, and a leading research university, Cornell. C$\beta$ will be built in an existing building at Cornell, for the most part using components that have been developed under previous R&D programs, including a fully commissioned world-leading photoemission electron injector, a large SRF accelerator module, and a high-power beam stop. The only elements that require design and construction from scratch is the FFAG magnet transport lattice. This white paper describes a project that promises to propel high-power, high-brightness electron beam science and applications to an exciting new level.

    Comment: White paper dated December 16, 2014. 16 pages, 8 figures
    Keywords Physics - Accelerator Physics
    Subject code 621
    Publishing date 2015-04-02
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: A storage ring experiment to detect a proton electric dipole moment.

    Anastassopoulos, V / Andrianov, S / Baartman, R / Baessler, S / Bai, M / Benante, J / Berz, M / Blaskiewicz, M / Bowcock, T / Brown, K / Casey, B / Conte, M / Crnkovic, J D / D'Imperio, N / Fanourakis, G / Fedotov, A / Fierlinger, P / Fischer, W / Gaisser, M O /
    Giomataris, Y / Grosse-Perdekamp, M / Guidoboni, G / Hacıömeroğlu, S / Hoffstaetter, G / Huang, H / Incagli, M / Ivanov, A / Kawall, D / Kim, Y I / King, B / Koop, I A / Lazarus, D M / Lebedev, V / Lee, M J / Lee, S / Lee, Y H / Lehrach, A / Lenisa, P / Levi Sandri, P / Luccio, A U / Lyapin, A / MacKay, W / Maier, R / Makino, K / Malitsky, N / Marciano, W J / Meng, W / Meot, F / Metodiev, E M / Miceli, L / Moricciani, D / Morse, W M / Nagaitsev, S / Nayak, S K / Orlov, Y F / Ozben, C S / Park, S T / Pesce, A / Petrakou, E / Pile, P / Podobedov, B / Polychronakos, V / Pretz, J / Ptitsyn, V / Ramberg, E / Raparia, D / Rathmann, F / Rescia, S / Roser, T / Kamal Sayed, H / Semertzidis, Y K / Senichev, Y / Sidorin, A / Silenko, A / Simos, N / Stahl, A / Stephenson, E J / Ströher, H / Syphers, M J / Talman, J / Talman, R M / Tishchenko, V / Touramanis, C / Tsoupas, N / Venanzoni, G / Vetter, K / Vlassis, S / Won, E / Zavattini, G / Zelenski, A / Zioutas, K

    The Review of scientific instruments

    2016  Volume 87, Issue 11, Page(s) 115116

    Abstract: A new experiment is described to detect a permanent electric dipole moment of the proton with a sensitivity of ... ...

    Abstract A new experiment is described to detect a permanent electric dipole moment of the proton with a sensitivity of 10
    Language English
    Publishing date 2016-11
    Publishing country United States
    Document type Journal Article
    ZDB-ID 209865-9
    ISSN 1089-7623 ; 0034-6748
    ISSN (online) 1089-7623
    ISSN 0034-6748
    DOI 10.1063/1.4967465
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Polarized proton collisions at 205 GeV at RHIC.

    Bai, M / Roser, T / Ahrens, L / Alekseev, I G / Alessi, J / Beebe-Wang, J / Blaskiewicz, M / Bravar, A / Brennan, J M / Bruno, D / Bunce, G / Courant, E / Drees, A / Fischer, W / Gardner, C / Gill, R / Glenn, J / Haeberli, W / Huang, H /
    Jinnouchi, O / Kewisch, J / Luccio, A / Luo, Y / Nakagawa, I / Okada, H / Pilat, F / Mackay, W W / Makdisi, Y / Montag, C / Ptitsyn, V / Satogata, T / Stephenson, E / Svirida, D / Tepikian, S / Trbojevic, D / Tsoupas, N / Wise, T / Zelenski, A / Zeno, K / Zhang, S Y

    Physical review letters

    2006  Volume 96, Issue 17, Page(s) 174801

    Abstract: The Brookhaven Relativistic Heavy Ion Collider (RHIC) has been providing collisions of polarized protons at a beam energy of 100 GeV since 2001. Equipped with two full Siberian snakes in each ring, polarization is preserved during acceleration from ... ...

    Abstract The Brookhaven Relativistic Heavy Ion Collider (RHIC) has been providing collisions of polarized protons at a beam energy of 100 GeV since 2001. Equipped with two full Siberian snakes in each ring, polarization is preserved during acceleration from injection to 100 GeV. However, the intrinsic spin resonances beyond 100 GeV are about a factor of 2 stronger than those below 100 GeV making it important to examine the impact of these strong intrinsic spin resonances on polarization survival and the tolerance for vertical orbit distortions. Polarized protons were first accelerated to the record energy of 205 GeV in RHIC with a significant polarization measured at top energy in 2005. This Letter presents the results and discusses the sensitivity of the polarization survival to orbit distortions.
    Language English
    Publishing date 2006-05-05
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.96.174801
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Observation of a hybrid spin resonance

    Bai / Allgower / Ahrens / Alessi / Brown / Bunce / Cameron / Chu / Courant / Glenn / Huang / Jeon / Kponou / Krueger / Luccio / Makdisi / Lee / Ratner / Reece /
    Roser / Spinka / Syphers / Tsoupas / Underwood / van Asselt W / Williams

    Physical review letters

    2000  Volume 84, Issue 6, Page(s) 1184–1187

    Abstract: A new type of spin depolarization resonance has been observed at the Brookhaven Alternating Gradient Synchrotron (AGS). This spin resonance is identified as a strong closed-orbit sideband around the dominant intrinsic spin resonance. The strength of the ... ...

    Abstract A new type of spin depolarization resonance has been observed at the Brookhaven Alternating Gradient Synchrotron (AGS). This spin resonance is identified as a strong closed-orbit sideband around the dominant intrinsic spin resonance. The strength of the resonance was proportional to the 9th harmonic component of the horizontal closed orbit and proportional to the vertical betatron oscillation amplitude. This "hybrid" spin resonance cannot be overcome by the partial snake at the AGS, but it can be corrected by the harmonic orbit correctors.
    Language English
    Publishing date 2000-02-07
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.84.1184
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Search for bound states of the eta meson in light nuclei.

    Chrien / Bart / Pile / Sutter / Tsoupas / Funsten / Finn / Lyndon / Punjabi / Perdrisat / Lieb / Kishimoto / Liu / Estep / Dropesky / Stronach / Stearns

    Physical review letters

    1988  Volume 60, Issue 25, Page(s) 2595–2598

    Language English
    Publishing date 1988-06-20
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.60.2595
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Study of hypernuclei by associated production.

    Pile / Bart / Chrien / Millener / Sutter / Tsoupas / Peng / Mishra / Hungerford / Kishimoto / Tang / von Witsch W / Xu / Maeda / Gill / McCrady / Quinn / Seydoux / Sleight /
    Stearns / Plendl / Rafatian / Reidy

    Physical review letters

    1991  Volume 66, Issue 20, Page(s) 2585–2588

    Language English
    Publishing date 1991-05-20
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.66.2585
    Database MEDical Literature Analysis and Retrieval System OnLINE

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