• R.C. Webber, G. Apollinari, J.-P. Carneiro, I.G. Gonin, B.M. Hanna, S. Hays, T.N. Khabiboulline, G. Lanfranco, R.L. Madrak, A. Moretti, T.H. Nicol, T.M. Page, E. Peoples, H. Piekarz, L. Ristori, G.V. Romanov, C.W. Schmidt, J. Steimel, I. Terechkine, R.L. Wagner, D. Wildman
  Fermilab, Batavia
• P.N. Ostroumov
  ANL, Argonne
• W.M. Tam
  IUCF, Bloomington, Indiana

Funding: Fermilab is operated by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the United States Department of Energy.
The High Intensity Neutrino Source (HINS) linac R&D program at Fermilab aims to construct and operate a first-of-a-kind, 60 MeV, superconducting H^- linac. The machine will demonstrate acceleration of high intensity beam using superconducting spoke cavities from 10 MeV, solenoidal focusing optics throughout for axially-symmetric beam to control halo growth, and operation of many cavities from a single high power rf source for acceleration of non-relativistic particles.

Slides

• R.L. Madrak, D. Wildman
  Fermilab, Batavia
• A.K.L. Dymokde-Bradshaw, J.D. Hares, P.A. Kellett
  Kentech Instruments Ltd., Wallingford, Oxfordshire

A fast chopper capable of kicking single 2.5 MeV H^- bunches, spaced at 325 MHz, at rates greater than 50 MHz is needed for the Fermilab High Intensity Neutrino Source (HINS). Four 1.2 kV fast pulsers, designed and manufactured by Kentech Instruments Ltd., will drive a ~0.5m long meander made from a copper plated ceramic composite. Test results showing pulses from the prototype 1.2 kV pulser propagating down the meander will be presented.

• W.M. Tam, G. Apollinari, T.N. Khabiboulline, R.L. Madrak, A. Moretti, L. Ristori, G.V. Romanov, J. Steimel, R.C. Webber, D. Wildman
  Fermilab, Batavia
• W.M. Tam
  IUCF, Bloomington, Indiana

The High Intensity Neutrino Source (HINS) R&D program at Fermilab will build a new 65 MeV test linac to demonstrate new technologies for application in a high intensity hadron linac front-end. The HINS warm section is composed of an ion source, a radio frequency quadrupole, a medium energy beam transport and 16 room temperature Crossbar H-type (RT-CH) cavities that accelerate the beam to 10 MeV (β=0.1422). The RT-CH cavities are separated by superconducting solenoids enclosed in individual cryostats. Beyond 10 MeV, the design uses superconducting spoke resonators. In this paper, we illustrate the completion of four RT-CH cavities and explain latest modifications in the mechanical and radio frequency (RF) designs. Cavities RF measurements and tuning performed at Fermilab are also discussed. Descriptions of the HINS R&D Facility including high power RF, vacuum, cooling and low level RF systems will be given. Finally, the history of RF conditioning and the results of high power tests of RT-CH cavities will be discussed.

• R.L. Madrak, D. Wildman
  Fermilab, Batavia

One of the goals of the low energy 60 MeV section of the Fermilab HINS H^- linac is to demonstrate that a total of 40 rf cavities can be powered by a single 2.5 MW, 325 MHz klystron. This requires individual vector modulators at the input of each rf cavity to independently adjust the amplitude and phase of the rf input signal during the 3.5 ms rf pulse. Two versions of vector modulators have been developed; a 500 kW device for the RFQ and a 75 kW modulator for the remaining rf cavities. High power test results showing the vector modulator phase and amplitude responses will be presented.