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Gonin, I.G.

Paper Title Page
MOPEC081 The Concept Design of the CW Linac of the Project X 654
 
  • N. Solyak, E. Gianfelice-Wendt, I.G. Gonin, S. Kazakov, V.A. Lebedev, S. Nagaitsev, J.-F. Ostiguy, N. Perunov, G.V. Romanov, V.P. Yakovlev
    Fermilab, Batavia
  
 

The concept design of the 2.5 GeV superconducting CW linac of the Project X is discussed. The linac structure and break points for different cavity families are described. The results of the RF system optimization are presented as well as the lattice design and beam dynamics analysis.

  
MOPEC082 Lattice Design for Project -X CW Superconducting Linac 657
 
  • N. Solyak, I.G. Gonin, J.-F. Ostiguy, V.P. Yakovlev
    Fermilab, Batavia
  • N. Perunov
    MIPT, Dolgoprudniy, Moscow Region
  
 

In this paper, we discuss beam dynamics optimization for a proposed continuous wave (CW) Project-X superconducting (SC) linac. This 2.6 GeV linac has an average current (over few microseconds) of 1 mA, with a pulsed current of up to 5-10 mA. The beam power is 2.6 MW. The CW linac consists of a low-energy 325 MHz section (2.5 MeV - 470 MeV) containing three families of SC single-spoke resonators and one family of triple-spoke resonators followed by a high-energy 1.3 GHz SC section (470 MeV - 2.6 GeV) containing squeezed elliptical (β=0.81) and ILC-type (β=1) cavities. Transverse and longitudinal dynamics in the CW linac are modeled assuming a peak current 10 mA. Different options for focusing structures are considered: solenoidal, doublet, and triplet focusing in the low-energy section; FODO and doublet focusing in the high energy section.

  
MOPD061 650 MHz Option for High-energy Part of the Project X linac 825
 
  • V.P. Yakovlev, M.S. Champion, I.G. Gonin, S. Nagaitsev, N. Solyak
    Fermilab, Batavia
  • A. Saini
    University of Delhi, Delhi
  
 

650 MHz option for the high energy part of the 2.6 GeV, CW Project X linac is discussed. It may give significant benefits compared to current 1.3 GHz option based on the utilization of ILC-type beta=1 cavities. Results of the break point optimization for linac stages, cavity optimization and beam dynamics optimization are presented. Possible reduction in the number of cryomodules and linac length compared to the current linac project version is discussed. Cryogenic losses are analyzed also.

  
WEPEC057 Single Spoke Cavities for Low-energy Part of CW Linac of Project X. 3022
 
  • I.G. Gonin, M.S. Champion, T.N. Khabiboulline, A. Lunin, N. Perunov, N. Solyak, V.P. Yakovlev
    Fermilab, Batavia
  
 

In the low-energy part of the Project X H-linac there families of 325 MHz SC single spoke cavities will be used, having beta = 0.11, 0.22 and 0.4. Two versions of the beta = 0.11 cavity were considered: low-beta single-spoke cavity and half-wave cavity. Results of detailed optimization of both versions are presented. Single spoke cavity was selected for the linac because of higher r/Q. Results of the beam dynamics optimization for initial stage of the linac with beta=0.11 single spoke cavity are presented as well.

  
WEPEC059 The Beam Splitter for the Project X 3025
 
  • N. Solyak, I.G. Gonin, D.E. Johnson, S. Nagaitsev, V.P. Yakovlev
    Fermilab, Batavia
  
 

In the Project X facility a 2.6 GeV, H- CW beam is delivered to three users simultaneously by way of selectively filling appropriate RF buckets at the front end of the linac and then RF splitting them to three different target halls. With the desire to split the H- beam three ways, an RF separator directs two quarters of the beam to one user (Mu2e), one quarter to another user (Kaon), and one quarter to the third (unidentified) user. The natural way is to use a SC structure with the deflecting TM110 mode. Basic requirements to the deflecting RF structure are formulated and design of the deflecting SC cavities is presented.

  
WEPE034 Final Results on RF and Wake Kicks Caused by the Couplers for the ILC Cavity 3431
 
  • A. Lunin, I.G. Gonin, N. Solyak, V.P. Yakovlev
    Fermilab, Batavia
  
 

In the paper the results are presented for calculation of the transverse wake and RF kick from the power and HOM couplers of the ILC acceleration structure. The RF kick was calculated stand-alone by HFSS, CST MWS and COMSOL codes while the wake kick was calculated by GdfidL. The calculation precision and convergence for both cases are discussed and compared to the results obtained independently by other group.

  
THPD048 First High-gradient Tests of the Single-cell SC Cavity with the Feedback Waveguide 4390
 
  • P.V. Avrakhov, A. Kanareykin
    Euclid TechLabs, LLC, Solon, Ohio
  • M. Ge, I.G. Gonin, T.N. Khabiboulline, J.P. Ozelis, A.M. Rowe, N. Solyak, G. Wu, V.P. Yakovlev
    Fermilab, Batavia
  • J. Rathke
    AES, Medford, NY
  
 

Use of a superconducting travelling wave accelerating (STWA) structure with a small phase advance per cell rather than a standing wave structure may provide a significant increase in the accelerating gradient in the ILC linac. For the same surface electric and magnetic fields the STWA achieves an accelerating gradient 1.2 larger than TESLA-like standing wave cavities. In addition, the STWA allows longer acceleration cavities, reducing the number of gaps between them. However, the STWA structure requires a SC feedback waveguide to return the few hundreds of MW of circulating RF power from the structure output to the structure input. A test single-cell cavity with feedback was designed and manufactured to demonstrate the possibility of a proper processing to achieve a high accelerating gradient. The first results of high-gradient tests of a prototype 1.3 GHz single-cell cavity with feedback waveguide will be presented.