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24 results on '"T. Satogata"'

1. The Continuous Electron Beam Accelerator Facility at 12 GeV

Author

P. A. Adderley, S. Ahmed, T. Allison, R. Bachimanchi, K. Baggett, M. BastaniNejad, B. Bevins, M. Bevins, M. Bickley, R. M. Bodenstein, S. A. Bogacz, M. Bruker, A. Burrill, L. Cardman, J. Creel, Y.-C. Chao, G. Cheng, G. Ciovati, S. Chattopadhyay, J. Clark, W. A. Clemens, G. Croke, E. Daly, G. K. Davis, J. Delayen, S. U. De Silva, M. Diaz, R. Dickson, L. Doolittle, D. Douglas, M. Drury, E. Feldl, J. Fischer, A. Freyberger, V. Ganni, R. L. Geng, C. Ginsburg, J. Gomez, J. Grames, J. Gubeli, J. Guo, F. Hannon, J. Hansknecht, L. Harwood, J. Henry, C. Hernandez-Garcia, T. Hiatt, D. Higinbotham, S. Higgins, A. S. Hofler, J. Hogan, C. Hovater, A. Hutton, C. Jones, K. Jordan, M. Joyce, R. Kazimi, M. Keesee, M. J. Kelley, C. Keppel, A. Kimber, L. King, P. Kjeldsen, P. Kneisel, J. Kowal, G. A. Krafft, G. Lahti, T. Larrieu, R. Lauze, C. Leemann, R. Legg, R. Li, F. Lin, D. Machie, J. Mammosser, K. Macha, K. Mahoney, F. Marhauser, B. Mastracci, J. Matalevich, J. McCarter, M. McCaughan, L. Merminga, R. Michaud, V. Morozov, C. Mounts, J. Musson, R. Nelson, W. Oren, R. B. Overton, G. Palacios-Serrano, H.-K. Park, L. Phillips, S. Philip, F. Pilat, T. Plawski, M. Poelker, P. Powers, T. Powers, J. Preble, T. Reilly, R. Rimmer, C. Reece, H. Robertson, Y. Roblin, C. Rode, T. Satogata, D. J. Seidman, A. Seryi, A. Shabalina, I. Shin, C. Slominski, R. Slominski, M. Spata, D. Spell, J. Spradlin, M. Stirbet, M. L. Stutzman, S. Suhring, K. Surles-Law, R. Suleiman, C. Tennant, H. Tian, D. Turner, M. Tiefenback, O. Trofimova, A.-M. Valente, H. Wang, Y. Wang, K. White, C. Whitlatch, T. Whitlatch, M. Wiseman, M. J. Wissman, G. Wu, S. Yang, B. Yunn, S. Zhang, and Y. Zhang

Subjects
Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

This review paper describes the energy-upgraded Continuous Electron Beam Accelerator Facility (CEBAF) accelerator. This superconducting linac has achieved 12 GeV beam energy by adding 11 new high-performance cryomodules containing 88 superconducting cavities that have operated cw at an average accelerating gradient of 20 MV/m. After reviewing the attributes and performance of the previous 6 GeV CEBAF accelerator, we discuss the upgraded CEBAF accelerator system in detail with particular attention paid to the new beam acceleration systems. In addition to doubling the acceleration in each linac, the upgrade included improving the beam recirculation magnets, adding more helium cooling capacity to allow the newly installed modules to run cold, adding a new experimental hall, and improving numerous other accelerator components. We review several of the techniques deployed to operate and analyze the accelerator performance and document system operating experience and performance. In the final portion of the document, we present much of the current planning regarding projects to improve accelerator performance and enhance operating margins, and our plans for ensuring CEBAF operates reliably into the future. For the benefit of potential users of CEBAF, the performance and quality measures for the beam delivered to each of the experimental halls are summarized in the Appendix.

Published
2024
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2. Demonstration of electron cooling using a pulsed beam from an electrostatic electron cooler

Author

M. W. Bruker, S. Benson, A. Hutton, K. Jordan, T. Powers, R. Rimmer, T. Satogata, A. Sy, H. Wang, S. Wang, H. Zhang, Y. Zhang, F. Ma, J. Li, X. M. Ma, L. J. Mao, X. P. Sha, M. T. Tang, J. C. Yang, X. D. Yang, H. Zhao, and H. W. Zhao

Subjects
Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Cooling of hadron beams is critically important in the next generation of hadron storage rings for delivery of unprecedented performance. One such application is the electron-ion collider presently under development in the US. The desire to develop electron coolers for operation at much higher energies than previously achieved necessitates the use of radio-frequency (rf) fields for acceleration as opposed to the conventional, electrostatic approach. While electron cooling is a mature technology at low energy utilizing a dc beam, rf acceleration requires the cooling beam to be bunched, thus extending the parameter space to an unexplored territory. It is important to experimentally demonstrate the feasibility of cooling with electron bunches and further investigate how the relative time structure of the two beams affects the cooling properties; thus, a set of four pulsed-beam cooling experiments was carried out by a collaboration of Jefferson Lab and Institute of Modern Physics (IMP). The experiments have successfully demonstrated cooling with a beam of electron bunches in both the longitudinal and transverse directions for the first time. We have measured the effect of the electron bunch length and longitudinal ion focusing strength on the temporal evolution of the longitudinal and transverse ion beam profile and demonstrate that if the synchronization can be accurately maintained, the dynamics are not adversely affected by the change in time structure.

Published
2021
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4. Measurement of IR optics with linear coupling’s action-angle parametrization

Author

Y. Luo, M. Bai, F. Pilat, T. Satogata, and D. Trbojevic

Subjects
Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Linear coupling’s action-angle parametrization is convenient for interpretation of turn-by-turn beam position monitor (BPM) data. We demonstrate how to apply this parametrization to extract Twiss and coupling parameters in interaction regions (IRs), using BPMs on each side of a long IR drift region. Example data were acquired at the Relativistic Heavy Ion Collider, using an ac dipole to excite a single transverse eigenmode. We have measured the waist of the β function and its Twiss and coupling parameters.

Published
2005
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5. Electron cloud measurements and simulations for the Brookhaven Relativistic Heavy Ion Collider

Author

W. Fischer, J. M. Brennan, M. Blaskiewicz, and T. Satogata

Subjects
Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Intense ion beams in the Brookhaven Relativistic Ion Collider lead to a rise in the vacuum pressure. Electron clouds can contribute to such a process. To measure electron cloud densities the coherent tune shift along the bunch train was observed with different bunch spacings and intensities. From the measured coherent tune shifts, electron cloud densities are computed and compared with densities obtained in electron cloud simulations.

Published
2002
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6. Artificial Intelligence for the Electron Ion Collider (AI4EIC).

Author

C. Allaire, R. Ammendola, E.-C. Aschenauer, M. Balandat, Marco Battaglieri, J. C. Bernauer, M. Bondì, N. Branson, T. Britton, Anja Butter, I. Chahrour, P. Chatagnon, Evaristo Cisbani, E. W. Cline, S. Dash, C. T. Dean, W. Deconinck, A. Deshpande, Markus Diefenthaler, R. Ent, Cristiano Fanelli, M. Finger, E. Fol, S. Furletov, Y. Gao, James Giroux, N. C. Gunawardhana Waduge, O. Hassan, P. L. Hegde, Roger José Hernández-Pinto, Astrid N. Hiller Blin, Tanja Horn, J. Huang, A. Jalotra, D. Jayakodige, B. Joo, M. Junaid, N. Kalantarians, Piyush Karande, B. Kriesten, R. Kunnawalkam Elayavalli, Y. Li, M. Lin, Frank Liu 0001, S. Liuti, G. Matousek, Matthew McEneaney, Diana McSpadden, T. Menzo, T. Miceli, Vinicius Mikuni, R. Montgomery, Benjamin Nachman, R. R. Nair, J. Niestroy, S. A. Ochoa Oregon, J. Oleniacz, J. D. Osborn, C. Paudel, C. Pecar, C. Peng, Gabriel N. Perdue, W. Phelps, Martin L. Purschke, H. Rajendran, K. Rajput, Y. Ren, David Francisco Rentería-Estrada, D. Richford, B. J. Roy, D. Roy, A. Saini, Nobuo Sato, T. Satogata, German Sborlini, Malachi Schram, David Shih, J. Singh, R. Singh, Andrzej Siódmok, J. Stevens, P. Stone, L. Suarez, K. Suresh, Abdel Nasser Tawfik, Fernando Torales Acosta, N. Tran, R. Trotta, F. J. Twagirayezu, R. Tyson, S. Volkova, Anselm Vossen, Eric Walter, Daniel Whiteson, Michael Williams, S. Wu, N. Zachariou, and P. Zurita

Published
2024
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7. Artificial Intelligence for the Electron Ion Collider (AI4EIC).

Author

C. Allaire, R. Ammendola, E.-C. Aschenauer, M. Balandat, Marco Battaglieri, J. C. Bernauer, M. Bondì, N. Branson, Thomas Britton, Anja Butter, I. Chahrour, P. Chatagnon, Evaristo Cisbani, E. W. Cline, S. Dash, C. T. Dean, W. Deconinck, A. Deshpande, Markus Diefenthaler, R. Ent, Cristiano Fanelli, M. Finger, M. Finger Jr., E. Fol, S. Furletov, Yuan Gao, James Giroux, N. C. Gunawardhana Waduge, R. Harish, O. Hassan, P. L. Hegde, Roger José Hernández-Pinto, Astrid N. Hiller Blin, Tanja Horn, J. Huang, D. Jayakodige, B. Joo, M. Junaid, Piyush Karande, B. Kriesten, R. Kunnawalkam Elayavalli, M. Lin, Frank Liu 0001, S. Liuti, G. Matousek, Matthew McEneaney, Diana McSpadden, T. Menzo, T. Miceli, Vinicius Mikuni, R. Montgomery, Benjamin Nachman, R. R. Nair, J. Niestroy, S. A. Ochoa Oregon, J. Oleniacz, J. D. Osborn, C. Paudel, C. Pecar, C. Peng, Gabriel N. Perdue, W. Phelps, Martin L. Purschke, K. Rajput, Y. Ren, David Francisco Rentería-Estrada, D. Richford, B. J. Roy, D. Roy, Nobuo Sato, T. Satogata, German Sborlini, Malachi Schram, David Shih, J. Singh, R. Singh, Andrzej Siódmok, P. Stone, J. Stevens, L. Suarez, K. Suresh, Abdel Nasser Tawfik, Fernando Torales Acosta, N. Tran, R. Trotta, F. J. Twagirayezu, R. Tyson, S. Volkova, Anselm Vossen, Eric Walter, Daniel Whiteson, Michael Williams, S. Wu, N. Zachariou, and P. Zurita

Published
2023
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8. The Present and Future of QCD: QCD Town Meeting White Paper -- An INput to the 2023 NSAC Long Range Plan

Author

P Achenbach, D Adhikari, A Afanasev, F Afzal, C Aidala, A Al-bataineh, D Almaaloi, M Amaryan, D Androic, W Armstrong, M Arriatia, J Arrington, A Asaturyan, E Aschenauer, H Atac, H Avakian, T Averett, C Ayerbe Gayoso, X Bai, K Barish, N Barnea, G Basar, M Battaglieri, A Baty, I Bautista, A Bazilevsky, C Beattie, S Behera, V Bellini, R Bellwied, J Benesch, F Benmokhtar, C Bernardes, J Bernauer, H Bhatt, S Bhatta, M Boer, T Boettcher, S Bogacz, H Bossi, J Brandenburg, E Brash, R Briceno, W Briscoe, S Brodsky, D Brown, V Burkert, H Caines, I Cali, A Camsonne, D Carman, J Caylor, S Cerci, M Chamizo Llatas, J Chen, Y Chen, Y Chien, P Chou, X Chu, E Chudakov, E Cline, I Cloet, P Cole, M Conners, M Constantinou, W Cosyn, S Covrig Dusa, R Cruz-Torres, U D'Alesio, C da Silva, Z Davoudi, C Dean, D Dean, M Demarteau, A Deshpande, W Detmold, A Deur, B Devkota, S Dhital, M Diefenthaler, S Dobbs, M Doring, X Dong, R Dotel, K Dow, E Downie, J Drachenberg, A Dumitru, J Dunlop, R Dupre, J Durham, D Dutta, R Edwards, R Ehlers, L El Fassi, M Elaasar, L Elouadrhiri, M Engelhardt, R Ent, S Esumi, O Evdokimov, O Eyser, C Fanelli, R Fatemi, I Fernando, F Flor, N Fomin, A Frawley, T Federico, R Fries, C Gal, B Gamage, L Gamberg, H Gao, D Gaskell, F Geurts, Y Ghandilyan, R Gilman, C Gleason, K Gnanvo, R Gothe, S Greene, H Griesshammer, S Grossberndt, B Grube, D Hackett, T Hague, H Hakobyan, J Hansen, Y Hatta, M Hattawy, L Havener, O Hen, W Henry, D Higinbotham, T Hobbs, A Hodges, T Holmstrom, B Hong, T Horn, C Howell, H Huang, M Huang, S Huang, G Huber, C Hyde, E Isupov, P Jacobs, J Jalilian-Marian, A Jentsch, H Jheng, C Ji, X Ji, J Jia, D Jones, M Jones, N Kalantarians, G Kalicy, Z Kang, J Karthein, D Keller, C Keppel, V Khachartryan, D Kharzeev, M Kim, Y Kim, P King, E Kinney, S Klein, H Ko, V Koch, M Kohl, Y Kovchegov, G Krintiras, V Kubarovsky, S Kuhn, K Kumar, T Kutz, J Lajoie, J Lauret, I Lavrukhin, D Lawrence, J Lee, K Lee, S Lee, Y Lee, S Li, W Li, X Li, J Liao, H Lin, M Lisa, K Liu, M Liu, T Liu, S Liuti, N Liyanage, W Llope, C Loizides, R Longo, W Lorenzon, X Luo, R Ma, B McKinnon, D Meekins, Y Mehtar-Tani, W Melnitchouk, A Metz, C Meyer, Z Meziani, R Michaels, R Milner, H Mkrtchyan, P Mohanmurthy, B Mohanty, V Mokeev, I Mooney, C Morningstar, D Morrison, B Muller, S Mukherjee, J Mulligan, C Munoz Camacho, J Murillo Quijada, M Murray, S Nadeeshani, P Nadel-Turonski, J Nam, C Nattrass, G Nijs, J Norohna, J Noronha-Hostler, N Novitzky, M Nycz, F Olness, J Osborn, R Pak, B Pandey, M Paolone, Z Papandreou, J Paquet, S Park, K Paschke, B Pasquini, E Pasyuk, T Patel, A Patton, C Paudel, C Peng, J Peng, H Pereira Da Costa, D Perepelitsa, M Peters, P Petreczky, R Pisarski, D Pitonyak, M Ploskon, M Posik, J Poudel, R Pradhan, A Prokudin, C Pruneau, J Putschke, J Pybus, J Qiu, K Rajagopal, C Ratti, K Read, R Reed, D Richards, C Riedl, F Ringer, T Rinn, J Rittenhouse West, J Roche, A Rodas, G Roland, F Romero-Lopez, P Rossi, T Rostomyan, L Ruan, O Ruimi, N Saha, N Sahoo, T Sakaguchi, F Salazar, C Salgado, G Salme, S Salur, S Santiesteban, M Sargsian, M Sarsour, N Sato, T Satogata, S Sawada, T Schafer, B Scheihing-Hitschfeld, B Schenke, S Schindler, A Schmidt, R Seidl, M Sabestari, P Shanahan, C Shen, T Sheng, M Shepherd, A M Sickles, M Sievert, K Smith, Y Song, A Sorensen, P Souder, N Spareveris, S Srednyak, A Stahl Leiton, A Stasto, P Steinberg, S Stepanyan, M Stephanov, J Stevens, D Stewart, I Stewart, M Stojanovic, I Strakovsky, S Strauch, M Strickland, D Sunar Cerci, M Suresh, B Surrow, S Syritsyn, A Szczepaniak, A Tadepalli, A H Tang, J Tapia Takaki, T Tarnowsky, A Tawfik, M Taylor, C Tennant, A Thiel, D Thomas, Y Tian, A Timmins, P Tribedy, Z Tu, S Tuo, T Ullrich, E Umaka, N Ghimire, J Vary, J Velkovska, R Venugopalan, A Vijayakumar, I Vitev, W Vogelsang, R Vogt, A Vossen, E Voutier, V Vovchenko, A Walker-Loud, F Wang, J Wang, X Wang, L Weinstein, T Wenaus, S Weyhmiller, S Wissink, B Wojtsekhowski, C Wong, M Wood, Y Wunderlich, B Wyslouch, B Xiao, W Xie, W Xiong, N Xu, Q Xu, Z Xu, D Yaari, X Yao, Z Ye, C Yero, F Yuan, W Zajc, C Zhang, J Zhang, F Zhao, Y Zhao, Z Zhao, X Zheng, and J Zhou

Published
2023
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9. Summary of numerical noise studies for Electron-Ion Collider strong-strong beam-beam simulation

Author

Y Luo, D Xu, Y Hao, J Qiang, J S Berg, M Blaskiewicz, W Fischer, R Gamage, X Gu, H Huang, G Hoffstaetter, J Kewisch, H Lovelace, C Montag, V Morozov, E Nisson, S Peggs, V Ptitsyn, T Satogata, and F Willeke

Subjects
History, Computer Science Applications, Education
Abstract

The Electron-Ion Collider (EIC) presently under construction at Brookhaven National Laboratory will collide polarized high energy electron beams with hadron beams with design luminosities up to 1 × 1034cm−2s−1 in center mass energy range of 20-140 GeV. We studied the planned electron-proton collisions using a Particle-In-Cell (PIC) based Poisson solver in strong-strong beam-beam simulation. We observed a much larger proton emittance growth rate than in weak-strong simulation. To understand the numerical noise and its impact on strong-strong simulation results, we carried out extensive studies to identify all possible causes for artificial emittance growth and quantify their contributions. In this article, we summarize our study activities and findings. This work will help us better understand the simulated emittance growth and the limits of the PIC based strong-strong beam-beam simulation.

Published
2023
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10. European Spallation Source Technical Design Report

Author

C. Carlile, R. Miyamoto, A. Pahlsson, M. Trojer, J. G. Weisend II, M. -L. Ainalem, K. H. Andersen, K. Batkov, P. Carlsson, D. Ene, B. Heden, K. Hedin, A. J. Jackson, P. Jacobsson, O. Kirstein, G. Lanfranco, Y. Lee, M. Lindroos, J. Malovrh Rebec, G. Trahern, J. Yeck, M. Ålberg, N. Ahlfors, R. Ainsworth, C. Alba-Simionesco, S. Alimov, N. Aliouane, B. Alling, K. Andersson, M. Andersson, N. H. Andersen, D. Anevski, S. Ansell, V. Antonelli, D. Argyriou, L. Arleth, E. Babcock, S. Barbanotti, F. Beckmann, P. M. Bentley, P. Beran, L. Berden, F. Bergstedt, J. Bermejo, M. Berrada, M. Bertelsen, Y. Beßler, T. Bigault, J. Birch, J. O. Birk, J. Bobnar, C. Bohme, A. Bollhalder, P. Boni, H. N. Bordallo, P. Bosland, S. Bousson, W. G. Bouwman, G. Brandl, S. Brault, J. Brinch, R. Brinkmann, H. Brueck, T. Bruckel, J. C. Buffet, M. Bulat, R. Burge, I. Bustinduy, M. Butzek, X. X. Cai, R. Caniello, M. Cardenas, G. Castro, H. Carlsen, L. Celona, Y. Chen, N. Cherkashyna, S. Choroba, B. Cheymol, M. Christensen, N. B. Christensen, E. P. Cippo, A. Class, K. Clausen, U. Clemens, J. F. Clergeau, M. Comunian, C. Cooper-Jensen, J. Correa, G. Croci, G. Cuk, L. Cussen, Y. Dai, H. Danared, D. Dancila, C. Darve, T. Davenne, P. De Vicente, P. P. Deen, M. Dell’Anno Boulton, S. Deledda, C. Densham, R. De Prisco, M. Desmons, G. Devanz, F. M. Dominguez, P. Duchesne, R. Duperrier, P. Duthil, H. Eckerlebe, S. Eckert, H. -J. Eckholt, T. Ekelof, J. Embs, M. Eneroth, R. Engels, C. Engling, M. Eshraqi, R. Fabbri, C. Fazio, J. Fenske, J. Fetzer, U. Filges, U. Fischer, K. G. Fissum, M. Forster, A. France, A. Franciosi, P. Freeman, H. Frielinghaus, C. Frojdh, C. Frost, T. Gahl, S. Gallimore, S. Gammino, N. Gandalfo, R. Georgii, G. Gerbeth, G. Gervasini, B. -E. Ghidersa, A. Ghiglino, L. Giacomelli, O. Gonzalez, G. Gorini, V. Goryashiko, M. Gohran, K. Gajewski, A. Goukassov, D. Graf, F. Grespan, A. Gromov, G. Grosso, U. Greuter, C. Grunzweig, B. Guerard, S. Gysin, K. Habicht, H. Hahn, E. A. L. Hakansson, S. Hall, R. Hall-Wilton, B. R. Hansen, U. B. Hansen, T. Hansson, T. Haraldsen, V. Haramus, C. -H. Hardh, H. Hassan, H. Hassanzadegan, B. C. Hauback, W. Haussler, W. Hees, G. Helgesen, P. Henry, L. Hermansson, A. Hiess, A. Hilger, T. Hofmann, C. Hoglund, L. Hoitzner, A. I. S. Holm, S. Holm, L. Høpfner, C. Horstmann, A. Houben, L. Hultman, M. Imam, A. Ioffe, J. Iversen, S. Iyengar, P. Jacobs, C. L. Jacobsen, H. Jacobsen, J. Jacobsen, A. Jansson, K. Jensch, J. Jensen, M. Jensen, X. J. Jin, A. J. Johansson, R. Jongeling, F. Juranyi, C. Kagi, R. Kampmann, K. Kanaki, N. Kardjilov, S. Kecskes, P. Keller, G. Kemmerling, M. Kenzelmann, A. Khaplanov, C. Kharoua, I. Khokhriakov, K. Kiefer, B. Kildetoft, T. Kittelmann, H. Kleines, K. Klenø, E. B. Klinkby, B. Klosgen, E. B. Knudsen, K. Knudsen, J. Kohlbrecher, M. Konnecke, A. Konobeev, P. Korelis, T. Kottig, L. Kramer, J. Krasna, J. Krebs, Z. Kroflic, V. Krsjak, S. Kynde, B. Laatsch, P. Ladd, E. Laface, B. Lauritzen, R. E. Lechner, K. Lefmann, E. Lehmann, M. Lehmann, F. Leseigneur, K. Lieutenant, L. Lilje, R. Linander, H. Lindblad, B. Lindenau, I. Llamas-Jansa, T. Lofnes, W. Lohstroh, D. Lott, P. Lukas, J. Lundgren, M. Lundin, H. Mo ̈ller, M. Ma ́gan, I. Manke, M. Marko, N. Martin, D. Mascali, A. Matheisen, S. Mattauch, D. McGinnis, M. Meissner, P. Mereu, M. Meshkian, F. Mezei, W. -D. Moeller, J. Molander, S. Molloy, K. Mortensen, J. -F. Moulin, A. Milocco, M. Monkenbusch, M. Morgano, T. Muhlebach, M. Muller, J. L. Munoz, G. Nagy, D. Nekrassov, L. Neri, K. Neuhaus, J. Neuhausen, C. Niedermayer, J. B. Nielsen, S. Nielsen, B. Nilsson, P. Nilsson, E. Noah, E. Nonboel, P. Norby, A. Nordt, G. Nowak, E. Oksanen, G. Olivier, G. Olry, T. Panzner, S. Pape-Møller, C. Pappas, T. Parker, S. Pasini, H. Pedersen, S. Peetermans, J. Persson, B. Petersen, S. Petersson, S. Petersson Arskol, J. Pieper, A. Pietropaolo, J. Pilch, A. Piquet, F. Piscitelli, A. Pisent, E. Platacis, F. Plewinski, J. Plomp, J. Plouin, A. Ponton, S. Pospisil, B. Pottin, H. F. Poulsen, S. O. Poulsen, P. Radahl, P. K. Pranzas, M. Proell, O. Prokhnenko, K. Prokes, E. Rampnoux, E. Rantsiou, N. Rasmussen, O. Rasmussen, K. Rathsman, M. Rebai, T. Reiss, M. Rescic, D. Reschke, C. Rethfeldt, M. Reungoat, D. Reynet, D. Richter, M. Rieth, T. H. Rod, D. M. Rodriguez, I. Rodriguez, K. Rolfs, M. Rouijaa, R. Ruber, U. Rucker, C. Ruegg, H. Rønnow, M. Russina, A. Ryberg, P. Sabbagh, A. Sadeghzadeh, M. Sales, Z. Salhi, R. Santiago-Kern, J. Saroun, T. Satogata, F. Saxild, J. Schaffran, J. Schefer, J. Scherzinger, M. Schild, B. Schillinger, H. Schlarb, P. Schmakat, A. Schreyer, W. Schroeder, P. Schurtenberger, C. Schulz, M. Schulz, W. Schweika, M. Seifert, G. Severin, R. Seviour, M. Sharp, T. Shea, P. Sievers, L. Silvi, G. G. Simeoni, W. Singer, P. Sittner, R. Sjoholm, N. Skar-Gislinge, S. Skelboe, F. Sordo, J. Stahn, P. Staron, I. Stefanescu, F. Stefani, W. -D. Stein, R. Steitz, H. Stelzer, A. Steuwer, M. St ̈ormer, M. Strobl, P. Stronciwilk, P. Strunz, A. Sukhanova, I. Sutton, K. Svedin, H. Svensson, A. Takibayev, V. Talanov, M. Tardocchi, L. Tchelidze, M. Telling, S. Terron, K. Theodor, J. -P. Thermeau, H. D. Thomsen, K. Thomsen, A. Tibbelin, C. Tiemann, M. Trapp, N. Tsapatsaris, L. Udby, A. Ushakov, P. Van Esch, L. Van Eijck, S. Van Waasen, A. A. Van Well, C. Vasi, E. Vassallo, C. Vettier, A. Vickery, N. Violini, M. Vitorovic, R. Vivanco, E. Vogel, J. Voigt, L. Von Moos, H. P. Wacklin, X. Wang, X. L. Wang, T. Weber, R. Wedberg, S. Weichselbaumer, B. Weinhorst, H. Weise, A. Weisenburger, P. K. Willendrup, R. Willumeit, T. Wilpert, A. Wischnewski, M. Wohlmuther, J. Wolters, R. A. Yogi, L. Zanini, K. Zagar, K. Zeitelhack, C. Zendler, R. Zeng, V. Ziemann, M. Zoppi, and A. Zugazaga

Published
2013
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12. RHIC Polarized Proton Performance in Run-8

Author

C. Montag, M. Bai, W. W. MacKay, T. Roser, N. Abreu, L. Ahrens, D. Barton, J. Beebe-Wang, M. Blaskiewicz, J. M. Brennan, K. A. Brown, D. Bruno, G. Bunce, R. Calaga, P. Cameron, R. Connolly, T. D’Ottavio, A. Drees, A. V. Fedotov, W. Fischer, G. Ganetis, C. Gardner, J. Glenn, T. Hayes, H. Huang, P. Ingrassia, D. A. Kayran, J. Kewisch, R. C. Lee, F. Lin, V. N. Litvinenko, A. U. Luccio, Y. Luo, Y. Makdisi, N. Malitsky, G. Marr, A. Marusic, R. Michnoff, J. Morris, B. Oerter, F. Pilat, P. Pile, G. Robert-Demolaize, T. Russo, T. Satogata, C. Schultheiss, M. Sivertz, K. Smith, S. Tepikian, D. Trbojevic, N. Tsoupas, J. Tuozzolo, A. Zaltsman, A. Zelenski, K. Zeno, S. Y. Zhang, Donald G. Crabb, Yelena Prok, Matt Poelker, Simonetta Liuti, Donal B. Day, and Xiaochao Zheng

Subjects
Nuclear physics, Physics, law, Physics::Accelerator Physics, Particle accelerator, Beam polarization, Nuclear Experiment, Polarization (waves), Relativistic Heavy Ion Collider, Linear particle accelerator, law.invention
Abstract

During Run‐8, the Relativistic Heavy Ion Collider (RHIC) provided collisions of spin‐polarized proton beams at two interaction regions. Physics data were taken with vertical orientation of the beam polarization, which in the “Yellow” RHIC ring was significantly lower than in previous years. We present recent developments and improvements as well as the luminosity and polarization performance achieved during Run‐8, and we discuss possible causes of the not as high as previously achieved polarization performance of the “Yellow” ring.

Published
2009
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16. Hadron Beam-Beam Diffusion in 2.5-D

Author

T. Satogata and S. Peggs

Subjects
Coupling, Nuclear physics, Physics, Amplitude, Modulation (music), Tevatron, Diffusion (business), Resonance (particle physics), Beam (structure), Exponential function, Computational physics
Abstract

The standard analysis of modulational diffusion for general nonlinearities is qualitatively summarized, and compared to the particular case of a beam-beam simulation with two kicks per turn, plus tune modulation. A simulation with realistic Tevatron parameters shows amplitude growth over long timescales of order 10{sup 4} synchrotrons periods. The simulated amplitude growth is qualitatively similar to the predictions of modulational diffusion, showing large discrete steps in the evolution speed as the tune distance from the nearest 2-D weak coupling resonance is varied. However, the simulation shows a fundamental difference is that the observed amplitude growth is approximately exponential in time, and not approximately root time as predicted in the standard analysis. Possible reasons for this and other discrepancies are briefly discussed.

Published
1999
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17. Sextant Test software post-mortem

Author

D Barton, J. Kewsich, K. Laster, G. Trahern, Hoff, S. Peggs, T. Satogata, G. Ganetis, J. Morris, T. Clifford, and T. D Ottavio

Subjects
medicine.medical_specialty, Software, business.industry, Computer science, law, medicine, Medical physics, business, Sextant, Test (assessment), law.invention
Published
1997
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18. AGS to RHIC Transfer Line: Design and Commissioning

Author

W. MacKay, L. Ahrens, M. Brennan, K. Brown, T. Clifford, R. Connolly, F. Dell, D. P. Deng, L. Hoff, J. Kewisch, G. Maldonado, B. Martin, R. Olsen, S. Peggs, F. Pilat, T. Robinson, S. Sathe, T. Satogata, D. Shea, T. J. Shea, M. Tanaka, P. Thompson, S. Tepikian, C. G. Trahern, D. Trbojevic, N. Tsoupas, J. Wei, R. Witkover, and P. Zhou

Subjects
Physics, Ion beam, Instrumentation, Transfer line, Particle accelerator, Alternating Gradient Synchrotron, law.invention, Nuclear physics, law, Computer Science::Programming Languages, Physics::Accelerator Physics, Laser beam quality, Nuclear Experiment, Relativistic Heavy Ion Collider, Beam (structure)
Abstract

In the fall of 1995, we successfully completed a major milestone in the RHIC (Relativistic Heavy Ion Collider) project: the first beam test of the AGS (Alternating Gradient Synchrotron) to RHIC (ATR) transfer line. The ATR serves as a test bed for the new RHIC control system. This transfer line is highly instrumented, with several types of instrumentation for characterizing the extracted beam from AGS and for matching the beam into RHIC. We describe the design and performance of ATR with gold ions with an eye to reaching the design criteria for RHIC operation, both in beam quality and controls.

Published
1996
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21. Polarized proton collisions at 205 GeV at RHIC.

Author

Bai M, Roser T, Ahrens L, Alekseev IG, Alessi J, Beebe-Wang J, Blaskiewicz M, Bravar A, Brennan JM, 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 WW, Makdisi Y, Montag C, Ptitsyn V, Satogata T, Stephenson E, Svirida D, Tepikian S, Trbojevic D, Tsoupas N, Wise T, Zelenski A, Zeno K, and Zhang SY

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.

Published
2006
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22. Density resolution of proton computed tomography.

Author

Schulte RW, Bashkirov V, Klock MC, Li T, Wroe AJ, Evseev I, Williams DC, and Satogata T

Subjects
Algorithms, Electrons, Image Processing, Computer-Assisted, Models, Statistical, Monte Carlo Method, Phantoms, Imaging, Protons, Radiation Dosage, Radiometry, Radiotherapy Dosage, Software, Tomography Scanners, X-Ray Computed, Tomography, X-Ray Computed instrumentation, X-Rays, Radiotherapy, Conformal methods, Tomography methods, Tomography, X-Ray Computed methods
Abstract

Conformal proton radiation therapy requires accurate prediction of the Bragg peak position. Protons may be more suitable than conventional x-rays for this task since the relative electron density distribution can be measured directly with proton computed tomography (CT). However, proton CT has its own limitations, which need to be carefully studied before this technique can be introduced into routine clinical practice. In this work, we have used analytical relationships as well as the Monte Carlo simulation tool GEANT4 to study the principal resolution limits of proton CT. The noise level observed in proton CT images of a cylindrical water phantom with embedded tissue-equivalent density inhomogeneities, which were generated based on GEANT4 simulations, compared well with predictions based on Tschalar's theory of energy loss straggling. The relationship between phantom thickness, initial energy, and the relative electron density resolution was systematically investigated to estimate the proton dose needed to obtain a given density resolution. We show that a reasonable density resolution can be achieved with a relatively small dose, which is comparable to or even lower than that of x-ray CT.

Published
2005
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23. Driven response of a trapped particle beam.

Author

Satogata T, Chen T, Cole B, Finley D, Gerasimov A, Goderre G, Harrison M, Johnson R, Kourbanis I I, Manz C, Merminga N, Michelotti L, Peggs S, Pilat F, Pruss S, Saltmarsh C, Saritepe S, Talman R, Trahern CG, and Tsironis G

Published
1992
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