2011 Particle Accelerator Conference - List of Authors (Sahni, V.C.)

Paper	Title	Page
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.

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.

Paper

Title

Page

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.

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.