Status of Slip Stacking at Fermilab Main Injector

Seiya, K.; Berenc, Tim; Dey, J.; Chase, Brian; Kourbanis, I.; MacLachlan, J.; Meisner, K.; Pasquinelli, Ralph J.; Reid, J.; Rivetta, C.; Steimel, J.

doi:10.1109/pac.2005.1590430

Cited by 7 publications

(6 citation statements)

References 3 publications

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“…A scheme was developed through which the Main Injector could support slip stacking for antiproton production, while also providing (unstacked) beam to NuMI. This mode of operation has been in place since 2004 [59] and typically provides batch intensities of 8×10 12 protons, concurrent with an additional 22×10 12 of unstacked beam for neutrino production.…”

Section: Slip Stackingmentioning

confidence: 99%

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The NOvA Technical Design Report

Lindner

2007

271

350

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This Technical Design Report (TDR) describes the preliminary design of the NOνA accelerator upgrades, NOνA detectors, detector halls and detector sites. Compared to the March 2006 and November 2006 NOνA Conceptual Design Reports (CDR), critical value engineering studies have been completed and the alternatives still active in the CDR have been narrowed to achieve a preliminary technical design ready for a Critical Decision 2 review.Many aspects of NOνA described this TDR are complete to a level far beyond a preliminary design. In particular, the access road to the NOvA Far Detector site in Minnesota has an advanced technical design at a level appropriate for a Critical Decision 3a review. Several components of the accelerator upgrade and new neutrino detectors also have advanced technical designs appropriate for a Critical Decision 3a review.Chapter 1 is an Executive Summary with a short description of the NOνA project.Chapter 2 describes how the Fermilab NuMI beam will provide a narrow band beam of neutrinos for NOνA.Chapter 3 gives an updated overview of the scientific basis for the NOνA experiment, focusing on the primary goal to extend the search for ν μ → ν e oscillations and measure the sin 2 (2θ 13 ) parameter. This parameter has not been measured in any previous experiment and NOνA would extend the search by about an order of magnitude beyond the current limit. A secondary goal is to measure the dominant mode oscillation parameters, sin 2 (2θ 23 ) and Δm 2 32 to a more precise level than previous experiments. Additional physics goals for NOνA are also discussed.Chapter 4 describes the Scientific Design Criteria which the Fermilab accelerator complex, NOνA detectors and NOνA detector sites must satisfy to meet the physics goals discussed in Chapter 3.Chapter 5 is an overview of the NOνA project. The changes in the design relative to the NOνA CDR are discussed.Chapter 6 summarizes the NOνA design performance relative to the Design Criteria set out in Chapter 4.Chapter 7 presents the Work Breakdown Structure dictionary at Level 3 and the Milestone dictionary.Chapters 8 through 17 then take each Level 2 WBS element of the NOνA project and present each part of the design in more detail than the overview given in Chapter 5. Specific technical design criteria are delineated for each part of the project in addition to the scientific design criteria outlined in Chapter 4. Changes in the design since the NOνA CDR are discussed in detail. The work remaining to bring each part of this preliminary design to a final design is outlined.Appendix A is a guide to other NOνA Project documentation with links to those documents.

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Section: Slip Stackingmentioning

confidence: 99%

“…Additionally, the new cavities for the Recycler are being designed to have smaller R s /Q by a factor of five. Nevertheless, a beam loading compensation system is expected to be necessary [59]; duplicating the features of the MI system will be adequate.…”

Section: Recyclermentioning

confidence: 99%

The NOvA Technical Design Report

Lindner

2007

271

350

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“…Following initial demonstrations of slip stacking, measurements and simulations were carried out [18] which revealed required upgrades and limitations. Beam loading compensation for the Main Injector rf was required for adequate capture in the lower voltage slip stacking buckets [19].…”

Section: A Slip Stacking Mechanismmentioning

confidence: 99%

Fermilab main injector: High intensity operation and beam loss control

Brown

Adamson

Capista

et al. 2013

Phys. Rev. ST Accel. Beams

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From 2005 through 2012, the Fermilab Main Injector provided intense beams of 120 GeV protons to produce neutrino beams and antiprotons. Hardware improvements in conjunction with improved diagnostics allowed the system to reach sustained operation at 400 kW beam power. Transmission was very high except for beam lost at or near the 8 GeV injection energy where 95% beam transmission results in about 1.5 kW of beam loss. By minimizing and localizing loss, residual radiation levels fell while beam power was doubled. Lost beam was directed to either the collimation system or to the beam abort. Critical apertures were increased while improved instrumentation allowed optimal use of available apertures. We will summarize the improvements required to achieve high intensity, the impact of various loss control tools and the status and trends in residual radiation in the Main Injector.

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“…Letting A represent the phase of LO where f LO is the down convert and up convert frequency and t is time € A = 2πf LO t (1) Next, B represents the phase of RF in where f RF is the frequency coming into the system and € θ(t) is an arbitrary phase offset of the incoming RF in € B = 2πf RF t + θ(t) (2) One then can define RF in to be € RF in = cos(B) (3) The resulting down convert output is LO x RF in In-phase € cos(A)cos(B) = 1 2…”

Section: In-phase and Quadrature Theorymentioning

confidence: 99%

“…The other 14 stations are turned off during this. In order to do slip stacking at high intensities [1] (Figure 2), I&Q was applied to the direct RF feedback of the station for stations off and to the feedforward beam loading compensation on all of the stations because of each groups individual slipping frequency. Direct RF feedback is applied at each individual station.…”

Section: Slip Stackingmentioning

confidence: 99%

53 MHz Beam Loading Compensation for Slip Stacking in the Fermilab Main Injector

Dey

Kourbanis²

Proceedings of the 2005 Particle Accelerator Conference

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Recently In-Phase and Quadrature (I&Q) was added to both the 53 MHz Feedback and Feedforward Beam Loading Compensation for Slip Stacking in the Fermilab Main Injector. With 53 MHz Feedback, we can now turn the 18 Radio Frequency (RF) Stations off down to below 100 V. In using I&Q on Feedforward, beam loading compensation to the beam on both the upper and lower frequencies of Slip Stacking can be applied as we slip the beam. I&Q theory will be discussed.

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Status of Slip Stacking at Fermilab Main Injector

Cited by 7 publications

References 3 publications

The NOvA Technical Design Report

The NOvA Technical Design Report

Fermilab main injector: High intensity operation and beam loss control

53 MHz Beam Loading Compensation for Slip Stacking in the Fermilab Main Injector

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