The Fermilab accelerator complex delivers intense high-energy proton beams to a variety of fixed-target scientific programs, including flagship long-baseline neutrino program. With the advent Deep Underground Neutrino Experiment (DUNE) and Long Baseline Facility (LBNF) program there is strong motivation for 2.4 MW beam power upgrade facility. We show facility can achieve with new rapid-cycling synchrotron (RCS) replace Booster we provide comprehensive technical analysis RCS-based design....

Detrimental beam dynamics effects limit performance of high intensity rapid cycling synchrotrons (RCS) such as the 8 GeV proton Fermilab Booster. Here we report results comprehensive experimental studies various dependent in In first part, dependencies Booster losses on total number protons per pulse and key operational parameters machine tunes chromaticities. Then cross-check two methods emittance measurements (the multi-wires proportional chambers ionization profile monitors). Finally used...

Criterion for a companion matrix to have certain number of flat portions on the boundary its numerical range is given. The criterion specialized cases 3 × and 4 matrices. In latter case, it proved that unitarily irreducible cannot three range. Numerical examples are given illustrate main results.

The FNAL accelerator complex is poised to reach MW neutrino beams on target for the exploration of dark sector physics and rare program spaces. Future operations will include CW linac at beam intensities that have not been seen before \cite{PIP2,RCS_LOI}. ambitious relies multi-turn H$^{-}$ injection into Booster then extracted delivery rings or Neutrino Beam (BNB) 8 GeV HEP program. A new rapid-cycling synchrotron (RCS) be required LBNF goal 2.4 because intense space-charge limitations....

At the Fermilab Booster, and many other proton facili-ties, an intense beam is accumulated by multi-turn injection of H- through a stripping foil. The circu-lating scatters off foil large-angle Coulomb scattering leads to uncontrolled losses concen-trated in first betatron period. We measure scat-tering loss rate Booster as function LINAC current, number turns, time on find that current operation has ~1% we make projections for Proton Improvement Plan II (PIP-II) injector upgrade. Here...

Electron cloud beam instabilities are an important consideration in virtually all high-energy particle accelerators and could pose a formidable challenge to forthcoming high-intensity accelerator upgrades. Dedicated tests have shown beampipe coatings dramatically reduce the density of electron accelerators. In this work, we evaluate performance titanium nitride, amorphous carbon, diamond-like carbon as for mitigation Fermilab Main Injector. Altogether our represent 2700 ampere-hours proton...

In Fermilab's 2022-2023 proton complex run, Fermilab recovered from an unexpected failure in the neutrino focusing horn to achieve a record beam power of 960 kW. For Snowmass and P5, recently proposed new upgrade plan known as Accelerator Complex Evolution (ACE) occur after PIP-II tandem with DUNE/LBNF operation. The first phase ACE, is ACE Main Injector Ramp Targetry upgrade, would raise LBNF 1.2 MW 2 by shortening cycle time around 0.65s. second Booster Replacement, replace machine 2.4 for...

he PIP-II proton accelerator will provide the intensity sufficient to power a new generation of high energy facilities at Fermilab. Extension that linac higher with following acceleration and bunching rings could needed feed muon production target for high-energy $\mu^{+} - \mu^{-}$ collider. Scenarios using rapid-cycling synchrotron or an $\sim$8 GeV Linac are presented discussed. Some near-term opportunities Fermilab collider R&D introduced.

Abstract An overview is given of the methods and preliminary results from dedicated beam studies on three topics conducted over five days in July 2023. In first study, Fermilab Booster magnets were held constant at magnetic fields corresponding to injection energy. The loss emittance growth observed under varying intensity, tunes, sextupole resonances. conditions also simulated with MADX-SC code [1]. second measurements vertical half-integer resonance correction are for high-intensity beams...

Tuning the accelerator during operational hours is a tedious yet essential aspect of managing any experimental facility. This process significantly reduces beam time available for experimenters, as diagnosing issues and making corrections can take hours. Automating or facilitating normal line tuning would be highly beneficial.

An overview is given of the methods and preliminary results from dedicated beam studies on three topics conducted over five days in July 2023. In first study, Fermilab Booster magnets were held constant at magnetic fields corresponding to injection energy. The loss emittance growth observed under varying intensity, tunes, sextupole resonances. conditions also simulated with MADX-SC code~\cite{Schmidt:2644660}. second measurements vertical half-integer resonance correction are for...

We develop a configuration of radio-frequency (rf) cavities to dramatically improve the performance slip stacking. Slip stacking is an accumulation technique used at Fermilab nearly double proton intensity by maintaining two beams different momenta in same storage ring. The particle are longitudinally focused Recycler 53 MHz 100 kV rf with small frequency difference between them. propose additional 106 20 cavity average upper and lower main frequencies. show harmonic cancels out resonances...

In an ideal accelerator, the single-particle dynamics can be decoupled into transverse motion—the betatron oscillations— and longitudinal synchrotron oscillations. Chromatic dispersive effects introduce a coupling between these dynamics, so-called synchro-betatron coupling. We present analysis of fully coupled over single oscillation that leads to averaged invariant with in generic lattice. apply this two problems: first, toy lattice where computations are analytically tractable, then design...