Author: Mishra, C.S.
Paper Title Page
TUP033 Engineering Design of Vertical Test Stand Cryostat 874
 
  • S.K. Suhane, S. Das, P.D. Gupta, S.C. Joshi, P.K. Kush, S. Raghvendra, N.K. Sharma
    RRCAT, Indore (M.P.), India
  • R.H. Carcagno, C.M. Ginsburg, C.S. Mishra, J.P. Ozelis, R. Rabehl, C. Sylvester
    Fermilab, Batavia, USA
  • V.C. Sahni
    Homi Bhbha National Institute (HBNI), DAE, Mumbai, India
 
  Under Indian Institutions and Fermilab collaboration Raja Ramanna Centre for Advanced Technology and Fermi Lab are jointly developing 2K Vertical Test Stand (VTS) cryostats for testing SCRF cavities. The VTS cryostat has been designed for a large testing aperture of 34 inches for testing of 325 MHz Spoke resonators, 650 MHz and 1.3 GHz multi-cell SCRF cavities for Project-X at FNAL and for VTS facility at RRCAT. VTS cryostat comprises of liquid helium (LHe) vessel with internal magnetic shield, top insert plate equipped with cavity support stand and radiation shield, liquid nitrogen (LN2) shield and vacuum vessel with external magnetic shield. . The engineering design and analysis of VTS cryostat has been carried out using ASME B&PV code and FEA. Design of internal and external magnetic shields was performed to limit the magnetic field inside LHe vessel, at the cavity surface <10 mG. Thermal analysis for LN2 shield has been performed to check the effectiveness of LN2 cooling.  
 
WEP006 Study of Effects of Failure of Beamline Elements & Their Compensation in CW Superconducting Linac 1513
 
  • A. Saini, K. Ranjan
    University of Delhi, Delhi, India
  • C.S. Mishra, N. Solyak, V.P. Yakovlev
    Fermilab, Batavia, USA
 
  Project-X is the proposed high intensity proton facility to be built at Fermilab, US. The first stage of the Project-X consists of superconducting Linac which will be operated in continuous wave (CW) mode to accelerate the beam from 2.5 MeV to 3 GeV. The operation at CW mode puts high tolerances on the beam line components, particularly on radiofrequency (RF) cavity. The failure of beam line elements at low energy is very critical as it results in mis-match of the beam with the following sections due to different beam parameters than designed parameter. It makes the beam unstable which causes emittance dilution, and ultimately results in beam losses. In worst case, it could affect the reliability of the machine and may lead to the shutdown of the Linac to replace the failed elements. Thus, it is important to study these effects and their compensation to get smooth beam propagation in Linac. This paper describes the results of study performed for the failure of RF cavity & solenoid in SSR0 section.  
 
WEP007 Calculation of Acceptance of High Intensity Superconducting Proton Linac for Project-X 1516
 
  • A. Saini, K. Ranjan
    University of Delhi, Delhi, India
  • C.S. Mishra, N. Solyak, V.P. Yakovlev
    Fermilab, Batavia, USA
 
  Project-X is the proposed high intensity proton facility to be built at Fermilab, US. Its Superconducting Linac, to be used at first stage of acceleration, will be operated in continuous wave (CW) mode. The Linac is divided into three sections on the basis of operating frequencies & six sections on the basis of family of RF cavities to be used for the acceleration of beam from 2.5 MeV to 3 GeV. The transition from one section to another can limit the acceptance of the Linac if these are not matched properly. We performed a study to calculate the acceptance of the Linac in both longitudinal and transverse plane. Investigation of most sensitive area which limits longitudinal acceptance and study of influence of failure of beam line elements at critical position, on acceptance are also performed.  
 
WEP242 Project X Functional Requirements Specification 1936
 
  • S.D. Holmes, S. Henderson, R.D. Kephart, J.S. Kerby, C.S. Mishra, S. Nagaitsev, R.S. Tschirhart
    Fermilab, Batavia, USA
 
  Funding: Work supported by the Fermi Research Alliance, under contract to the U.S. Department of Energy
Project X is a multi-megawatt proton facility being designed to support intensity frontier research in elementary particle physics, with possible applications to nuclear physics and nuclear energy research, at Fermilab. A Functional Requirements Specification has been developed in order to establish performance criteria for the Project X complex in support of these multiple missions. This paper will describe the Functional Requirements for the Project X facility and the rationale for these requirements.
 
 
TUP032 Development of 1.3 GHz Prototype Niobium Single Cell Superconducting Cavity Under IIFC Collaboration 871
 
  • A. Puntambekar, M. Bagre, J. Dwivedi, P.D. Gupta, R.K. Gupta, S.C. Joshi, G.V. Kane, R.S. Sandha, S.D. Sharma, P. Shrivastava
    RRCAT, Indore (M.P.), India
  • C.A. Cooper, M.H. Foley, T.N. Khabiboulline, C.S. Mishra, J.P. Ozelis, A.M. Rowe, G. Wu
    Fermilab, Batavia, USA
  • V. Jain
    IIT, Mumbai, India
  • D. Kanjilal, K.K. Mistri, P.N. Potukuchi, J. Sacharias
    IUAC, New Delhi, India
  • V.C. Sahni
    Homi Bhbha National Institute (HBNI), DAE, Mumbai, India
 
  Under Indian Institutions Fermilab collaboration (IIFC), Raja Ramanna Centre for Advanced Technology (RRCAT) Indore, Inter University Accelerator Centre (IUAC) New Delhi and Fermi National Accelerator Laboratory (FNAL) have developed two prototype 1.3 GHz niobium single cell superconducting cavities. Development of forming tools, forming of half cells, machining of components, development of welding fixtures along with RF & vacuum qualification were carried out at RRCAT. The electron beam welding was carried out at IUAC. The fabricated prototype cavities were tested for RF and vacuum leak tightness up to 77 K at RRCAT before shipment to FNAL. Processing, consisting of CBP, EP, and heat treatment was carried out jointly by FNAL and Argonne National Laboratory in USA. Both the prototype cavities were tested at 2 K in the VTS facility at FNAL and have achieved the accelerating gradient of ~ 19 to 21 MV/m with Q > 1.5 ·10+10. This paper will report the developmental efforts carried out in tooling, forming, machining, welding & various qualification procedures adopted. The paper will also present the processing and the 2 K test results.