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In this report we calculate the effect on single bunch emittance of incoming jitter or drift, and of misalignments of the beam pipes with respect to the beam axis, both analytically and through multi-particle tracking. Finally, we discuss ways of ameliorating the wake effects in the BDS, such as by changing the metal surface and/or the beam pipe aperture.Show More
Investigations of the wideband spectrum of higher order modes measured on tesla-style cavities at the FLASH LINAC
S. Molloy;C. Adolphsen;K. Bane;J. Frisch;Z. Li;J. May;D. McCormick;T. Smith;N. Baboi;N. Eddy;L. Piccoli;R. Rechenmacher;R. Jones
Higher Order Modes (HOMs) excited by the passage of the beam through an accelerating cavity depend on the properties of both the cavity and the beam. It is possible, therefore, to draw conclusions on the inner geometry of the cavities based on observations of the properties of the HOM spectrum. A data acquisition system based on two 20 GS/s, 6 GHz scopes has been set up at the FLASH facility, DESY...Show More
Design of the beam delivery system for the international linear collider
A. Seryi;J. Amann;R. Arnold;F. Asiri;K. Bane;P. Bellomo;E. Doyle;A. Fasso;K. Jonghoon;L. Keller;K. Ko;Z. Li;T. Markiewicz;T. Maruyama;K. Moffeit;S. Molloy;Y. Nosochkov;N. Phinney;T. Raubenheimer;S. Seletskiy;S. Smith;C. Spencer;P. Tenenbaum;D. Walz;G. White;M. Woodley;M. Woods;L. Xiao;M. Anerella;A. Jain;A. Marone;B. Parker;O. Delferriere;O. Napoly;J. Payet;D. Uriot;N. Watson;I. Agapov;J.-L. Baldy;D. Schulte;G. Burt;A. Dexter;K. Buesser;W. Lohmann;L. Bellantoni;A. Drozhdin;V. Kashikhin;V. Kuchler;T. Lackowski;N. Mokhov;N. Nakao;T. Peterson;M. Ross;S. Striganov;J. Tompkins;M. Wendt;X. Yang;A. Enomoto;S. Kuroda;T. Okugi;T. Sanami;Y. Suetsugu;T. Tauchi;M. del Carmen Alabau;P. Bambade;J. Brossard;O. Dadoun;P. Burrows;G. Christian;C. Clarke;B. Constance;H. Dabiri Khah;A. Hartin;C. Perry;C. Swinson;A. Ferrari;G. Blair;S. Boogert;J. Carter;D. Angal-Kalinin;C. Beard;C. Densham;L. Fernandez-Hernando;J. Greenhalgh;P. Goudket;F. Jackson;J. Jones;A. Kalinin;L. Ma;P. Mcintosh;H. Yamamoto;T. Mattison;J. Carwardine;C. Saunders;R. Appleby;E. Torrence;J. Gronberg;T. Sanuki;Y. Iwashita;V. Telnov;D. Warner
The beam delivery system for the linear collider focuses beams to nanometer sizes at its interaction point, collimates the beam halo to provide acceptable background in the detector and has a provision for state-of-the art beam instrumentation in order to reach the ILCs physics goals. This paper describes the design details and status of the baseline configuration considered for the reference desi...Show More
Design of the beam delivery system for the international linear collider
A. Seryi;J. Amann;R. Arnold;F. Asiri;K. Bane;P. Bellomo;E. Doyle;A. Fasso;K. Jonghoon;L. Keller;K. Ko;Z. Li;T. Markiewicz;T. Maruyama;K. Moffeit;S. Molloy;Y. Nosochkov;N. Phinney;T. Raubenheimer;S. Seletskiy;S. Smith;C. Spencer;P. Tenenbaum;D. Walz;G. White;M. Woodley;M. Woods;L. Xiao;M. Anerella;A. Jain;A. Marone;B. Parker;O. Delferriere;O. Napoly;J. Payet;D. Uriot;N. Watson;I. Agapov;J.-L. Baldy;D. Schulte;G. Burt;A. Dexter;K. Buesser;W. Lohmann;L. Bellantoni;A. Drozhdin;V. Kashikhin;V. Kuchler;T. Lackowski;N. Mokhov;N. Nakao;T. Peterson;M. Ross;S. Striganov;J. Tompkins;M. Wendt;X. Yang;A. Enomoto;S. Kuroda;T. Okugi;T. Sanami;Y. Suetsugu;T. Tauchi;M. del Carmen Alabau;P. Bambade;J. Brossard;O. Dadoun;P. Burrows;G. Christian;C. Clarke;B. Constance;H. Dabiri Khah;A. Hartin;C. Perry;C. Swinson;A. Ferrari;G. Blair;S. Boogert;J. Carter;D. Angal-Kalinin;C. Beard;C. Densham;L. Fernandez-Hernando;J. Greenhalgh;P. Goudket;F. Jackson;J. Jones;A. Kalinin;L. Ma;P. Mcintosh;H. Yamamoto;T. Mattison;J. Carwardine;C. Saunders;R. Appleby;E. Torrence;J. Gronberg;T. Sanuki;Y. Iwashita;V. Telnov;D. Warner
Year: 2007 | Conference Paper |
Suppression of secondary electron emission using triangular grooved surface in the ILC dipole and wiggler magnets
L. Wang;K. Bane;C. Chen;T. Himel;M. Munro;M. Pivi;T. Raubenheimer;G. Stupakov
The development of an electron cloud in the vacuum chambers of high intensity positron and proton storage rings may limit machine performance. The suppression of electrons in a magnet is a challenge for the positron damping ring of the International Linear Collider (ILC) as well as the Large Hadron Collider. Simulation show that grooved surfaces can significantly reduce the electron yield in a mag...Show More
Impedance and single bunch instability calculations for the ILC damping rings
M. Venturini;K. Bane;S. Heifets;Z. Li;C. Ng;A. Novokhatski;G. Stupakov;R. Warnock
2007 IEEE Particle Accelerator Conference (PAC)
Year: 2007 | Conference Paper |
An important action item for the damping rings of the International Linear Collider (ILC) is to compute the broadband impedance and, from it, the threshold to the microwave instability. We report on the status of our study and provide a preliminary estimate of the instability threshold based on impedance models developed so far.Show More
The nominal design gradient in the main linacs of the International Linear Collider (ILC) is 31.5 MV/m for a beam current of 9.0 mA. However, the superconducting cavities built to date have demonstrated a range in sustainable gradient extending well below this goal, being limited by Q drop-off and quenching. For the current distribution of gradient limits in the RF cavities of the ILC linacs we ha...Show More
Measurements of compression and emittance growth after the first LCLS bunch compressor chicane
K. Bane;Y. Ding;P. Emma;J. Frisch;Z. Huang;H. Loos;F. Sannibale;K. Sonnad;G. Stupakov;J. Wu;M. Zolotorev;E. Prat
2007 IEEE Particle Accelerator Conference (PAC)
Year: 2007 | Conference Paper |
The Linac Coherent Light Source (LCLS) is a SASE X-ray free-electron laser project presently under construction at SLAC [1]. The injector section from RF photocathode gun through first bunch compressor chicane was installed during the fall of 2006. The first bunch compressor is located at 250 MeV and nominally compresses a 1-nC electron bunch from an rms length of about 1 mm to 0.2 mm. Transverse ...Show More
Resistive Wall Wakefield in the LCLS Undulator
Proceedings of the 2005 Particle Accelerator Conference
Year: 2005 | Conference Paper |
Cited by: Papers (2)
Optimization of the LCLS X-Ray FEL Output Performance in the Presence of Strong Undulator Wakefields
S. Reiche;W.M. Fawley;K.L.F. Bane;P. Emma;Z. Huang;H.-D. Nuhn;G. Stupakov
Proceedings of the 2005 Particle Accelerator Conference
Year: 2005 | Conference Paper |
The Linac Coherent Light Source (LCLS) Free-Electron Laser will operate in the wavelength range of 1.5 to 15 Angstroms. Energy loss due to wakefields within the long undulator can degrade the FEL process by detuning the resonant FEL frequency. The wakefields arise from the vacuum chamber wall resistivity, its surface roughness, and abrupt changes in its aperture. For LCLS parameters, the resistive...Show More
Proposal of the Next Incarnation of Accelerator Test Facility at KEK for the International Linear Collider
S. Araki;H. Hayano;Y. Higashi;Y. Honda;K. Kanazawa;K. Kubo;T. Kume;M. Kuriki;S. Kuroda;M. Masuzawa;T. Naito;T. Okugi;R. Sugahara;T. Takahashi;T. Tauchi;N. Terunuma;N. Toge;J. Urakawa;V. Vogel;H. Yamaoka;K. Yokoya;J. Gao;W. Liu;G. Pei;J. Wang;B. Grishanov;P. Logachev;F. Podgorny;V. Telnov;D. Angal-Kalinin;R. Appleby;J. Jones;A. Kalinin;O. Napoly;J. Payet;H. Braun;D. Schulte;F. Zimmermann;T. Takahashi;Y. Iwashita;T. Mihara;P. Bambade;J. Gronberg;M. Kumada;S. Danagoulian;S. Mtingwa;N. Delerue;D. Howell;A. Reichold;D. Urner;J. Choi;J.-Y. Huang;H.S. Kang;E.-S. Kim;S. Kim;I.S. Ko;P. Burrows;G. Christian;S. Molloy;G. White;I. Agapov;G. Blair;G. Boorman;J. Carter;C. Driouichi;M. Price;N. Walker;K. Bane;A. Brachmann;T. Himel;T. Markiewicz;J. Nelson;N. Phinney;M. Pivi;T. Raubenheimer;M. Ross;R. Ruland;A. Seryi;C. Spencer;P. Tenenbaum;M. Woodley;S. Boogert;A. Liapine;S. Malton;E. Torrence;T. Sanuki;T. Suehara
Proceedings of the 2005 Particle Accelerator Conference
Year: 2005 | Conference Paper |
To reach design luminosity, the International Linear Collider (ILC) must be able to create and reliably maintain nanometer size beams. The ATF damping ring is the unique facility where ILC emittances are possible. In this paper we present and evaluate the proposal to create a final focus facility at the ATF which, using compact final focus optics and an ILC-like bunch train, would be capable of ac...Show More
Proposal of the Next Incarnation of Accelerator Test Facility at KEK for the International Linear Collider
S. Araki;H. Hayano;Y. Higashi;Y. Honda;K. Kanazawa;K. Kubo;T. Kume;M. Kuriki;S. Kuroda;M. Masuzawa;T. Naito;T. Okugi;R. Sugahara;T. Takahashi;T. Tauchi;N. Terunuma;N. Toge;J. Urakawa;V. Vogel;H. Yamaoka;K. Yokoya;J. Gao;W. Liu;G. Pei;J. Wang;B. Grishanov;P. Logachev;F. Podgorny;V. Telnov;D. Angal-Kalinin;R. Appleby;J. Jones;A. Kalinin;O. Napoly;J. Payet;H. Braun;D. Schulte;F. Zimmermann;T. Takahashi;Y. Iwashita;T. Mihara;P. Bambade;J. Gronberg;M. Kumada;S. Danagoulian;S. Mtingwa;N. Delerue;D. Howell;A. Reichold;D. Urner;J. Choi;J.-Y. Huang;H.S. Kang;E.-S. Kim;S. Kim;I.S. Ko;P. Burrows;G. Christian;S. Molloy;G. White;I. Agapov;G. Blair;G. Boorman;J. Carter;C. Driouichi;M. Price;N. Walker;K. Bane;A. Brachmann;T. Himel;T. Markiewicz;J. Nelson;N. Phinney;M. Pivi;T. Raubenheimer;M. Ross;R. Ruland;A. Seryi;C. Spencer;P. Tenenbaum;M. Woodley;S. Boogert;A. Liapine;S. Malton;E. Torrence;T. Sanuki;T. Suehara
Year: 2005 | Conference Paper |
Litrack: A Fast Longitudinal Phase Space Tracking Code with Graphical User Interface
Proceedings of the 2005 Particle Accelerator Conference
Year: 2005 | Conference Paper |
Cited by: Papers (9)
Linac-based light sources and linear colliders typically apply longitudinal phase space manipulations in their design, including electron bunch compression and wakefield-induced energy spread control. Several computer codes handle such issues, but most also require detailed information on the transverse focusing lattice. In fact, in most linear accelerators, the transverse distributions do not sig...Show More
A new analysis of intrabeam scattering
Proceedings of the 2003 Particle Accelerator Conference
Year: 2003 | Conference Paper |
Beginning with the Fokker-Planck equation we present a new analysis of intrabeam scattering (IBS) in electron storage rings. Our approach is distinguished by having no ill-defined Coulomb logarithm, a fundamental drawback of previous approaches. We treat the case of linear x/sub /spl beta//y/sub /spl beta// coupling in detail, deriving explicit expressions for the second moment invariants and thei...Show More
Calculation of collimator Wakefields
Proceedings of the 2003 Particle Accelerator Conference
Year: 2003 | Conference Paper |
Cited by: Papers (2)
Measurement of the longitudinal wakefield in the SLAC Linac for extremely short bunches
K. Bane;F.-J. Decker;P. Emma;L. Hendrickson;P. Krejcik;C.L. O'Connell;H. Schlarb;J. Welch;M. Woodley
Proceedings of the 2003 Particle Accelerator Conference
Year: 2003 | Conference Paper |
The linac coherent light source (LCLS) is an X-ray FEL project with a 1-nC electron bunch compressed to an rms length of 20 microns at 4.5 GeV, accelerated in 500 meters of SLAC linac to 15 GeV, and then injected into an undulator to generate SASE radiation. The longitudinal wakefield generated by the short bunch in the (S-band) linac is very strong, and is relied upon to cancel the energy chirp l...Show More
Traveling wave structure optimization for the NLC
Zenghai Li;K.L. Bane;R.H. Miller;T.O. Raubenheimer;Juwen Wang;R.D. Ruth
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)
Year: 2001 | Conference Paper |
Cited by: Papers (1)
The JLC/NLC linac must accelerate multi-bunch beams in order to obtain a luminosity >3/spl times/10/sup 34/ cm/sup -2/ sec/sup -1/ at a center of mass energy of 1 TeV. It is essential for the structure design to minimize the long and short-range dipole wakefields to prevent emittance degradation and the beam breakup instability (BBU). In addition, the structures must operate at a high RF gradient ...Show More
Intrabeam scattering analysis of ATF beam measurements
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)
Year: 2001 | Conference Paper |
Cited by: Papers (3)
In future e/sup +/e/sup -/ linear colliders, such as the JLC/NLC, damping rings are needed to generate beams of intense bunches with very low emittances. The Accelerator Test Facility (ATF) at KEK is a prototype for such damping rings. In April 2000 the single bunch energy spread, bunch length, and horizontal and vertical emittances of the beam in the ATF were all measured as functions of current,...Show More
Intra-beam scattering and minimum achievable emittance in the Advanced Light Source
C. Steier;D. Atkinson;J. Byrd;J. Corlett;H. Nishimura;D. Robin;S. de Santis;A. Wolski;Y. Wu;K. Bane;T. Raubenheimer;M. Ross;J. Sheppard;T. Smith
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)
Year: 2001 | Conference Paper |
Cited by: Papers (1)
Intra-beam scattering (IBS) potentially limits the minimum emittance of low-energy storage rings, and this effect strongly influences the choice of energy of damping rings for linear colliders. The Advanced Light Source (ALS) is a third-generation synchrotron light source operating with high-intensity, low-emittance beams at energies up to 2 GeV. It can operate with an emittance coupling of below ...Show More
Transverse wakefields from tapered collimators: measurements and analysis
P. Tenenbaum;K. Bane;L. Eriksson;R.K. Jobe;D. McCormick;C.K. Ng;T.O. Taubenheimer;M.C. Ross;G. Stupakov;D. Walz;D. Onoprienko
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)
Year: 2001 | Conference Paper |
Cited by: Papers (3)
We report on a series of measurements of the transverse wakefield from tapered collimators. The collimators were designed to principally present a geometric impedance to the beam, and to minimize impedances from resistivity or surface features; in addition, the geometries of the collimators were selected to permit examination of the scaling behavior of the wakefield due to collimator taper angle a...Show More
Accelerator structure R&D for linear colliders
J.W. Wang;C. Adolphsen;K.L. Bane;G.B. Bowden;D.L. Burke;H. Deruyter;J. Cornuelle;Z.D. Farkas;W.B. Fowkes;S. Hanna;H.A. Hoag;J. Irwin;R.M. Jones;K. Ko;N. Kroll;Z. Li;G.A. Loew;R.J. Loewen;R.H. Miller;C.K. Ng;J.M. Paterson;C. Pearson;T.O. Raubenhemer;J. Rifkin;R.D. Ruth;S.G. Tantawi;K.A. Thompson;K.W. Vaillancourt;A.E. Vlieks;P.B. Wilson;K. Asano;Y. Funahashi;Y. Higashi;T. Higo;N. Hitomi;T. Suzuki;K. Takata;T. Takatomi;N. Toge;Y. Watanabe;J. Elmer;J. Klingmann;M. Mugge;K. Van Bibber
Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366)
Year: 1999 | Conference Paper |
Cited by: Papers (10)
For more than ten years, we have been working on R&D for X-band accelerator structures for the JLC/NLC linear collider. Several types of Detuned (DS) and Damped Detuned Structures (DDS) have been successfully designed and fabricated. They have been experimentally tested at both low power and high power to characterize their mechanical and electrical properties. Recently we started developing a new...Show More
Accelerator structure R&D for linear colliders
J.W. Wang;C. Adolphsen;K.L. Bane;G.B. Bowden;D.L. Burke;H. Deruyter;J. Cornuelle;Z.D. Farkas;W.B. Fowkes;S. Hanna;H.A. Hoag;J. Irwin;R.M. Jones;K. Ko;N. Kroll;Z. Li;G.A. Loew;R.J. Loewen;R.H. Miller;C.K. Ng;J.M. Paterson;C. Pearson;T.O. Raubenhemer;J. Rifkin;R.D. Ruth;S.G. Tantawi;K.A. Thompson;K.W. Vaillancourt;A.E. Vlieks;P.B. Wilson;K. Asano;Y. Funahashi;Y. Higashi;T. Higo;N. Hitomi;T. Suzuki;K. Takata;T. Takatomi;N. Toge;Y. Watanabe;J. Elmer;J. Klingmann;M. Mugge;K. Van Bibber
Parameter optimization for the low frequency linacs in the NLC
Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366)
Year: 1999 | Conference Paper |
Cited by: Papers (3)
In the present Next Linear Collider (NLC) design, S and L-band linacs are used to accelerate the beams to 10 GeV, where they are injected into the main X-band linacs. As injectors for the main accelerator, these linacs are required to deliver clean beams while being reliable and cost effective. These requirements set stringent tolerances on the design of the accelerators. There are two types of mi...Show More
Wakefield and beam centering measurements of a damped and detuned X-band accelerator structure
C. Adolphsen;K. Bane;R. Jones;N. Kroll;D. McCormick;R. Miller;M. Ross;T. Slaton;J.W. Wang;T. Higo
Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366)
Year: 1999 | Conference Paper |
Cited by: Papers (3)
We present wakefield measurements of a prototype Next Linear Collider (NLC) accelerator structure that was built with dipole mode damping and detuning to suppress the long-range transverse wakefield induced by a beam. In addition, we describe beam centering tests that use as a guide the dipole power coupled out of the structure for damping purposes.Show More
Optics diagnostics and tuning for low emittance beam in KEK-ATF damping ring
H. Hayano;S. Kamada;K. Kubo;T. Naito;K. Oide;N. Terunuma;N. Toge;J. Urakawa;S. Kashiwagi;T. Okugi;M. Takano;K. Bane;T. Kotseroglou;M. Minty;M. Ross;J. Turner;M. Woodley;F. Zimmermann
Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366)
Year: 1999 | Conference Paper |
Cited by: Papers (1)
The target of KEK-ATF is producing electron beam with vertical emittance of 0.01 nm-rad (1/spl times/10/sup -11/ m-rad). Corrections of the dispersions are essential to achieve the low emittance. Because the actual optics of the beam line should be known for these corrections, beam based optics diagnostics has been performed. Simulations showed the validity and the accuracy of the method. Effects ...Show More
Emittance dilution and beam break up in the JLC/NLC
R.M. Jones;K.L.F. Bane;N.M. Kroll;R.H. Miller;T.O. Raubenheimer;G.V. Stupakov
Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366)
Year: 1999 | Conference Paper |
The passage of a multi-bunch beam through an X-band accelerator with cells and structures misaligned gives rise to wakefields which disrupt succeeding bunches. As a consequence, there is growth in the overall emittance of the final colliding bunches. Here we study this process in the context of a JLC-NLC which employs the recently developed RDDS (Rounded Damped Detuned Structures) accelerators wit...Show More
An apparatus for the direct measurement of collimator transverse wakefields
P. Tenenbaum;K. Bane;J. Irwin;R.K. Jobe;D. McCormick;T.O. Raubenheimer;M.C. Ross;G. Stupakov;D. Walz
Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366)
Year: 1999 | Conference Paper |
Cited by: Papers (2)
The design of the NLC beam delivery system requires a firmer understanding of the effects of collimators on short, intense bunches than is presently available. We describe an experiment to directly measure these effects through use of a dedicated apparatus located at the 1.19 GeV point in the SLAC linac. The apparatus consists of an outer vacuum vessel and an interchangeable insertion containing u...Show More
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