Welch, K.M.; McIntyre, G.T.; Tuozzolo, J.E.; Skelton, R.; Pate, D.J.; Gill, S.M.
Brookhaven National Lab., Upton, NY (USA)1989
Brookhaven National Lab., Upton, NY (USA)1989
AbstractAbstract
[en] The vacuum system of the Alternating Gradient Synchrotron (AGS) at Brookhaven National Laboratory has more than a thousand metal vacuum seals. Also, numerous elastomer seals are used throughout the AGS to seal large beam component chambers. An accelerator upgrade program is being implemented to reduce the AGS operating pressure by x100 and improve the reliability of the vacuum system. This paper describes work in progress on metal and elastomer vacuum seals to help meet those two objectives. Tests are reported on the sealing properties of a variety of metal seals used on different sealing surfaces. Results are also given on reversible sorption properties of certain elastomers. 16 refs., 6 figs., 4 tabs
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1989; 17 p; 11. international vacuum congress and 7th international conference on solid surfaces; Cologne (Germany, F.R.); 25-29 Sep 1989; CONF-890906--1; CONTRACT AC02-76CH00016; Available from NTIS, PC A03/MF A01 as DE89017607; OSTI; INIS; US Govt. Printing Office Dep
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Welch, K.M.; Tuozzolo, J.E.; McIntyre, G.T.; Skelton, R.; Brown, J.M.; Gill, S.M.; Barry, J.
Brookhaven National Lab., Upton, NY (USA)1989
Brookhaven National Lab., Upton, NY (USA)1989
AbstractAbstract
[en] Three years ago a program was initiated at Brookhaven National Laboratory to upgrade the Alternating Gradient Synchrotron (AGS) vacuum system. The three objectives of this work were to: (1) improve the vacuum system reliability; (2) improve its maintainability; and (3) improve its operating pressure from the present 2-3 x 10-7 Torr to < 10-8 Torr. This paper discusses how these objectives can be met. 9 refs., 8 figs., 1 tab
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1989; 18 p; 11. international vacuum congress and 7th international conference on solid surfaces; Cologne (Germany, F.R.); 25-29 Sep 1989; CONF-890906--2; CONTRACT AC02-76CH00016; Available from NTIS, PC A03/MF A01 as DE90000096; OSTI; INIS; US Govt. Printing Office Dep
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AbstractAbstract
[en] A brief over-view of the subject of sealography was given. Those results will be published elsewhere. However, results of metal vacuum seal tests, conducted at Brookhaven National Laboratory will be herein summarized. The paper then summarizes results of work done by the first author, at the Stanford Linear Acceleration Center, on the extended outgassing properties of elastomers including Viton reg-sign and Buna N reg-sign
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International symposium on electron beam ion sources and their applications; Upton, NY (USA); 14-18 Nov 1988; CONF-881154--
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DREES, A.; AHRENS, L.; III FLILLER, R.; GASSNER, D.; MCINTYRE, G.T.; MICHNOFF, R.; TRBOJEVIC, D.
Brookhaven National Lab., Upton, NY (United States). Funding organisation: USDOE Office of Energy Research (ER) (United States)2002
Brookhaven National Lab., Upton, NY (United States). Funding organisation: USDOE Office of Energy Research (ER) (United States)2002
AbstractAbstract
[en] During the RHIC Au-run in 2001 the 200 MHz storage cavity system was used for the first time. The rebucketing procedure caused significant beam debunching in addition to amplifying debunching due to other mechanisms. At the end of a four hour store, debunched beam could account for approximately 30%-40% of the total beam intensity. Some of it will be in the abort gap. In order to minimize the risk of magnet quenching due to uncontrolled beam losses at the time of a beam dump, a combination of a fast transverse kicker and copper collimators were used to clean the abort gap. This report gives an overview of the gap cleaning procedure and the achieved performance
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3 Jun 2002; 3 p; EUROPEAN PARTICLE ACCELERATOR CONFERENCE 2002; PARIS (France); 3-7 Jun 2002; KA040301; AC02-98CH10886; Available from PURL: https://www.osti.gov/servlets/purl/804613-6X9w6q/native/
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AbstractAbstract
[en] In excess of a thousand metal vacuum seals are used in the vacuum system of the Alternating Gradient Synchrotron (AGS) at Brookhaven National Laboratory. Numerous elastomer seals are used throughout the AGS to seal large beam component chambers. An accelerator upgrade program is being implemented to reduce the AGS operating pressure by a factor of 100 and improve the reliability of the vacuum system. This paper describes work in progress on metal and elastomer vacuum seals to help meet these two objectives. Tests are reported on the sealing properties of a variety of metal seals used with different sealing surfaces. Results are also given on reversible sorption properties of certain elastomers. (author)
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11. international vacuum congress (IVC-11); Cologne (Germany, F.R.); 25-29 Sep 1989; 7. international conference on solid surfaces (ICSS-7); Cologne (Germany, F.R.); 25-29 Sep 1989
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Ben-Zvi, I.; Barton, D.S.; Beavis, D.B.; Blaskiewicz, M.; Brennan, J.M.; Burrill, A.; Calaga, R.; Cameron, P.; Chang, X.Y.; Connolly, R.; Gassner, D.M.; Grimes, J.G.; Hahn, H.; Hershcovitch, A.; Hseuh, H.-C.; Johnson, P.D.J.; Kayran, D.; Kewisch, J.; Lambiase, R.F.; Litvinenko, V.; McIntyre, G.T.; Meng, W.; Nehring, T.C.N.; Nicoletti, T.; Oerter, B.; Pate, D.; Rank, J.; Rao, T.; Roser, T.; Russo, T.; Scaduto, J.; Segalov, Z.; Smith, K.; Williams, N.W.W.; Wu, K.-C.; Yakimenko, V.; Yip, K.; Zaltsman, A.; Zhao, Y.; Bluem, H.; Burger, A.; Cole, M.D.; Favale, A.J.; Holmes, D.; Rathke, J.; Schultheiss, T.; Todd, A.M.M.; Delayen, J.R.; Funk, L. W.; Kneisel, P.; Phillips, H.L.; Preble, J.P.
Brookhaven National Laboratory, Upton, NY (United States); Thomas Jefferson National Accelerator Facility, Newport News, VA (United States). Funding organisation: USDOE - Office of Energy Research (ER) (United States)2005
Brookhaven National Laboratory, Upton, NY (United States); Thomas Jefferson National Accelerator Facility, Newport News, VA (United States). Funding organisation: USDOE - Office of Energy Research (ER) (United States)2005
AbstractAbstract
[en] Next generation ERL light-sources, high-energy electron coolers, high-power Free-Electron Lasers, powerful Compton X-ray sources and many other accelerators were made possible by the emerging technology of high-power, high-brightness electron beams. In order to get the anticipated performance level of ampere-class currents, many technological barriers are yet to be broken. BNL's Collider-Accelerator Department is pursuing some of these technologies for its electron cooling of RHIC application, as well as a possible future electron-hadron collider. We will describe work on CW, high-current and high-brightness electron beams. This will include a description of a superconducting, laser-photocathode RF gun and an accelerator cavity capable of producing low emittance (about 1 micron rms normalized) one nano-Coulomb bunches at currents of the order of one ampere average
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16 May 2005; [vp.]; Particle Accelerator Conference (PAC 05); Knoxville, TN (United States); 16-20 May 2005; DOE/ER--40150-3746; AC--05-84ER40150; Available from OSTI as DE00876138; PURL: https://www.osti.gov/servlets/purl/876138-qLuLHR/
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Todd, A.M.M.; Ambrosio, A.; Bluem, H.; Christina, V.; Cole, M.D.; Falletta, M.; Holmes, D.; Peterson, E.; Rathke, J.; Schultheiss, T.; Wong, R.; Ben-Zvi, I.; Burrill, A.; Calaga, R.; Cameron, P.; Chang, X.Y.; Hahn, H.; Kayran, D.; Kewisch, J.; Litvinenko, V.; McIntyre, G.T.; Nicoletti, T.; Rank, J.; Rao, T.; Scaduto, J.; Wu, K.-C.; Zaltsman, A.; Zhao, Y.; Benson, S.V.; Daly, E.; Douglas, D.; Dylla, H.F.D.; Funk, L. W.; Hernandez-Garcia, C.; Hogan, J.; Kneisel, P.; Mammosser, J.; Neil, G.; Phillips, H.L.; Preble, J.P.; Rimmer, R.A.; Rode, C.H.; Siggins, T.; Whitlach, T.; Wiseman, M.; Campisi, I.E.; Colestock, P.; Kelley, J.P.; Kurennoy, S.S.; Nguyen, D.C.; Reass, W.; Rees, D.; Russell, S.J.; Schrage, D.L.; Wood, R.L.; Janssen, D.; Lewellen, J.W.; Sekutowicz, J.S.; Young, L.M.
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States). Funding organisation: US Department of Energy (United States); USDOE - Office of Energy Research ER (United States)2005
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States). Funding organisation: US Department of Energy (United States); USDOE - Office of Energy Research ER (United States)2005
AbstractAbstract
[en] A key technology issue of ERL devices for high-power free-electron laser (FEL) and 4th generation light sources is the demonstration of reliable, high-brightness, high-power injector operation. Ongoing programs that target up to 1 Ampere injector performance at emittance values consistent with the requirements of these applications are described. We consider that there are three possible approaches that could deliver the required performance. The first is a DC photocathode gun and superconducting RF (SRF) booster cryomodule. Such a 750 MHz device is being integrated and will be tested up to 100 mA at the Thomas Jefferson National Accelerator Facility beginning in 2007. The second approach is a high-current normal-conducting RF photoinjector. A 700 MHz gun will undergo thermal test in 2006 at the Los Alamos National Laboratory, which, if successful, when equipped with a suitable cathode, would be capable of 1 Ampere operation. The last option is an SRF gun. A half-cell 703 MHz SRF gun capable of delivering 1.0 Ampere will be tested to 0.5 Ampere at the Brookhaven National Laboratory in 2006. The fabrication status, schedule and projected performance for each of these state-of-the-art injector programs will be presented
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1 May 2005; [vp.]; Particle Accelerator Conference 2005; Knoxville, TN (United States); 16-20 May 2005; DOE/ER--40150-3642; AC--05-84ER40150; Available from OSTI as DE00860987; PURL: https://www.osti.gov/servlets/purl/860987-k3GutR/
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Ben-Zvi, I.; Barton, D.S.; Beavis, D.B.; Blaskiewicz, M.; Brennan, J.M.; Burrill, A.; Calaga, R.; Cameron, P.; Chang, X.Y.; Connolly, R.; Eidelman, Yu.I.; Fedotov, A.V.; Fischer, W.; Gassner, D.M.; Hahn, H.; Harrison, M.; Hershcovitch, A.; Hseuh, H.-C.; Jain, A.K.; Johnson, P.D.J.; Kayran, D.; Kewisch, J.; Lambiase, R.F.; Litvinenko, V.; MacKay, W.W.; Mahler, G.J.; Malitsky, N.; McIntyre, G.T.; Meng, W.; Mirabella, K.A.M.; Montag, C.; Nehring, T.C.N.; Nicoletti, T.; Oerter, B.; Parzen, G.; Pate, D.; Rank, J.; Rao, T.; Roser, T.; Russo, T.; Scaduto, J.; Smith, K.; Trbojevic, D.; Wang, G.; Wei, J.; Williams, N.W.W.; Wu, K.-C.; Yakimenko, V.; Zaltsman, A.; Zhao, Y.; Abell, D.T.; Bruhwiler, D.L.; Bluem, H.; Burger, A.; Cole, M.D.; Favale, A.J.; Holmes, D.; Rathke, J.; Schultheiss, T.; Todd, A.M.M.; Burov, A.V.; Nagaitsev, S.; Delayen, J.R.; Derbenev, Y.S.; Funk, L. W.; Kneisel, P.; Merminga, L.; Phillips, H.L.; Preble, J.P.; Koop, I.; Parkhomchuk, V.V.; Shatunov, Y.M.; Skrinsky, A.N.; Koop, I.; Parkhomchuk, V.V.; Shatunov, Y.M.; Skrinsky, A.N.; Sekutowicz, J.S.
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States). Funding organisation: USDOE - Office of Energy Research ER (United States)2005
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States). Funding organisation: USDOE - Office of Energy Research ER (United States)2005
AbstractAbstract
[en] We report progress on the R and D program for electron-cooling of the Relativistic Heavy Ion Collider (RHIC). This electron cooler is designed to cool 100 GeV/nucleon at storage energy using 54 MeV electrons. The electron source will be a superconducting RF photocathode gun. The accelerator will be a superconducting energy recovery linac. The frequency of the accelerator is set at 703.75 MHz. The maximum electron bunch frequency is 9.38 MHz, with bunch charge of 20 nC. The R and D program has the following components: The photoinjector and its photocathode, the superconducting linac cavity, start-to-end beam dynamics with magnetized electrons, electron cooling calculations including benchmarking experiments and development of a large superconducting solenoid. The photoinjector and linac cavity are being incorporated into an energy recovery linac aimed at demonstrating ampere class current at about 20 MeV. A Zeroth Order Design Report is in an advanced draft state, and can be found on the web at http://www.agsrhichome.bnl.gov/eCool/
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16 May 2005; [vp.]; Particle Accelerator Conference 2005; Knoxville, TN (United States); 16-20 May 2005; DOE/ER--40150-3651; AC--02-98CH10886; AC04-85ER40150; Available from OSTI as DE00861040; PURL: https://www.osti.gov/servlets/purl/861040-rTgwYR/
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