• R.E. Laxdal, C.D. Beard, R.J. Dawson, K. Fong, A. Grassellino, M.P. Laverty, D. Longuevergne, M. Marchetto, A.K. Mitra, T.C. Ries, I. Sekachev, Q. Zheng, V. Zvyagintsev
  TRIUMF, Vancouver

The ISAC-II Phase II expansion includes the addition of 20 new quarter wave resonators in three cryomodules to double the energy gain of the ISAC-II superconducting linac. The rf cavities are produced in Canada. The talk will concentrate on the beam commissioning (scheduled for March 2010) and early operating experience.

• D. Longuevergne
  UBC & TRIUMF, Vancouver, British Columbia
• C.D. Beard, A. Grassellino, P. Kolb, R.E. Laxdal, V. Zvyagintsev
  TRIUMF, Vancouver

The upgrade (Phase II) of the ISAC-II superconducting linac has been completed this spring and has been commissioned. Two spare 141 MHz Quarter-Wave Resonators made of bulk Niobium are available at TRIUMF to lead more specific studies on surface resistance. This opportunity has also been taken to optimize the surface treatment to improve the accelerating field gradient at the operating power level. The aim of the study presented here is to link together several surface treatments (etching depth, 120C baking) and test conditions (Q-disease, 4.2 K and 2K tests) and sequence them in an appropriate order to understand more deeply their dependencies.

• V. Naik, A. Bandyopadhyay, A. Chakrabarti, S. Dechoudhury, M. Mondal
  DAE/VECC, Calcutta
• F. Ames, R.A. Baartman, C.D. Beard, Y.-C. Chao, R.J. Dawson, P. Kolb, S.R. Koscielniak, R.E. Laxdal, M. Marchetto, L. Merminga, A.K. Mitra, T.C. Ries, I. Sekachev, V.A. Verzilov, F. Yan
  TRIUMF, Vancouver
• D. Longuevergne
  UBC & TRIUMF, Vancouver, British Columbia

TRIUMF (Canada) and VECC (India) are both planning to use the photo-fission route for producing neutron-rich radioactive ion beams in their respective RIB programmes. With this common goal the two institutes have entered into a collaboration to jointly design and develop a superconducting 1.3GHz 50MeV, 10 mA, CW electron linac which will be used as the fission driver. The first phase of the e-Linac collaboration aims at the development, production and full technical and beam test of a 10MeV injector cryo module (ICM) which forms the front-end of the final linac. The design and technical development of the ICM will be presented.

• R.E. Laxdal, C.D. Beard, A. Grassellino, P. Kolb, S.R. Koscielniak, V. Zvyagintsev
  TRIUMF, Vancouver
• D. Longuevergne
  UBC & TRIUMF, Vancouver, British Columbia
• R.S. Orr, W. Trischuk
  University of Toronto, Toronto, Ontario

TRIUMF has embarked on a 1.3GHz development program to support the construction of a 50MeV 10mA e-Linac for the production of radioactive ion beams through photo-fission. Two single cell bulk niobium cavities have been produced in Canadian Industry. A seven-cell cavity in copper is being fabricated both as a manufacturing model and to test higher order mode calculations. Electro-magnetic and mechanical models of a multi-cell cavity are being done to optimize the final design for high intensity acceleration. The 1.3GHz cavity development program will be presented.

• D. Longuevergne
  UBC & TRIUMF, Vancouver, British Columbia
• C.D. Beard, A. Grassellino, P. Kolb, R.E. Laxdal, V. Zvyagintsev
  TRIUMF, Vancouver

The ISAC-II superconducting linac consists of forty quarter wave bulk niobium cavities. There are eight and twelve 106MHz cavities at beta=5.7% and 7.1% respectively and twenty cavities at 141MHz at beta=11%. The first twenty have been operating since 2006 (Phase I) and the remainder have been installed for first commissioning in April 2010 (Phase II). Cavity performance statistics of the 2006 cavities have been accumulated to look for signs of systematic degradation in performance. These will be presented. In addition single cavity test results and in situ characterization tests of the first operation of the Phase II cavities will be presented.