• I. Kourbanis, P. Adamson, B.C. Brown, D. Capista, W. Chou, D.K. Morris, K. Seiya, G.H. Wu, M.-J. Yang
  Fermilab, Batavia

Funding: Work supported by Fermi Research Alliance, LLC under contract No. DE-AC02-07CH11359 with the United States Department of Energy.

Currently Main Injector delivers 330KW of beam power at 120 GeV by using multi-batch slip stacking. The beam power is expected to increase to 400KW after installing clearing gap kickers to eliminate the injection kicker gap loss. The plan to increase the beam power to 700KW for NOvA and the role of MI in Project-X (2.1MW operation) will be discussed.

• K. Seiya, B. Chase, J.E. Dey, P.W. Joireman, I. Kourbanis, J. Reid
  Fermilab, Batavia

The multi-batch slip stacking has been used for operation since January, 2008 and effectively increased proton intensity to the NuMI target by 50% in a MI cycle. The MI accepts 11 pulses at injection energy from the Booster and sends two pulses to Anti-proton production and nine to the NuMI beam line. The total beam power on a cycle was increased to 340 KW on average. We have been doing beam studies in order to increase the beam power to 400 kW and to control the beam loss. We also discuss 12 batch slip stacking scheme which is going to be used for future Neutrino experiments.

• N. Eddy, J.L. Crisp, I. Kourbanis, K. Seiya, R.M. Zwaska
  Fermilab, Batavia
• S. De Santis
  LBNL, Berkeley, California

The production of an Electron Cloud poses stability issues for future high intensity running of the Fermilab Main Injector. Recent experiements have shown the presense of the electron cloud can be detected by the phase shift of a TE wave propagated along the beampipe. This technique has been employed to provide very sensitive measurements of the electron cloud development in the Fermilab Main Injector.

Slides

• B.C. Brown, P. Adamson, D. Capista, A.I. Drozhdin, D.E. Johnson, I. Kourbanis, N.V. Mokhov, D.K. Morris, I.L. Rakhno, K. Seiya, V.I. Sidorov, G.H. Wu, M.-J. Yang
  Fermilab, Batavia

Funding: Work supported by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the United States Department of Energy

The Fermilab Main Injector is moving toward providing 400 kW of 120 GeV proton beams using slip stacking injection of eleven Booster batches. Loss of 5% of the beam at or near injection energy results in 1.5 kW of beam loss. A collimation system has been implemented to localize this loss with the design emphasis on beam not captured in the accelerating rf buckets. More than 90% of these losses are captured in the collimation region. We will report on the construction, commissioning and operation of this collimation system. Commissioning studies and loss measurement tools will be discussed. Residual radiation monitoring of the Main Injector machine components since 2004 will be used to demonstrate the effectiveness and limitations of these efforts.

• M.A. Furman
  LBNL, Berkeley, California
• I. Kourbanis, R.M. Zwaska
  Fermilab, Batavia

Funding: Supported by the US DOE under contract DE-AC02-05CH11231 and by the Fermilab Main Injector upgrade effort.

We provide a brief status report on measurements and simulations of the electron-cloud in the Fermilab Main Injector. Areas of agreement and disagreement are spelled out, along with their possible significance.