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An introduction and the status of R&D activities for a high-resolution, "cold" beam position monitor (BPM) and the related read-out electronics are discussed. Two different BPM detector concepts, to be attached to the SC quadrupole and…

Accelerator Physics · Physics 2009-02-19 M. Wendt , T. Lefevre , C. Simon , S. Vilalte

PIP-II is a superconducting linac that is in the initial acceleration chain for the Fermilab accelerator complex. The RF system consists of a warm front-end with an RFQ and buncher cavities along with 25 superconducting cryo-modules…

Accelerator Physics · Physics 2025-10-29 P. Varghese , S. Raman , M. Guran , L. Reyes , L. Doolittle , Q. Du , S. Murthy

Beam-excited higher order modes (HOM) in accelerating cavities contain transverse beam position information. Previous studies have narrowed down three modal options for beam position diagnostics in the third harmonic 3.9 GHz cavities at…

Accelerator Physics · Physics 2012-08-13 P. Zhang , N. Baboi , N. Eddy , B. Fellenz , R. M. Jones , B. Lorbeer , T. Wamsat , M. Wendt

Here, we introduce Linac_Gen, a tool developed at Fermilab, which combines machine learning algorithms with Particle-in-Cell methods to advance beam dynamics in linacs. Linac_Gen employs techniques such as Random Forest, Genetic Algorithms,…

Accelerator Physics · Physics 2024-06-25 Abhishek Pathak

Fermilab carries out an extensive program of accelerator-based high energy particle physics research at the Intensity Frontier that relies on the operation of 8 GeV and 120 GeV proton beamlines for a number of fixed target experiments.…

Accelerator Physics · Physics 2017-05-15 Vladimir Shiltsev

The FNAL accelerator complex is poised to reach MW neutrino beams on target for the exploration of the dark sector physics and rare physics program spaces. Future operations of the complex will include CW linac operations at beam…

We report the results of observations of H- beam instabilities at the Fermilab Linac. By intentionally creating "high" background pressure with different gases in the 750 keV transport line we observed coherent transverse beam oscillations.…

Accelerator Physics · Physics 2010-11-15 Milorad Popovic , Todd Sullivan

A dielectric-loaded linac powered by THz-pulses is one of the key parts of the "Attosecond X-ray Science: Imaging and Spectroscopy" (AXSIS) project at DESY, Hamburg. As in conventional accelerators, the AXSIS linac is designed to have phase…

Accelerator Physics · Physics 2018-12-26 K. Galaydych , R. Assmann , U. Dorda , B. Marchetti , G. Vashchenko , I. Zagorodnov

Following the PIP-II 800 MeV Linac, Fermilab will need an accelerator that extends from that linac to the MI injection energy of ~8 GeV, completing the modernization of the Fermilab high-intensity accelerator complex. This will maximize the…

PIP-II is an 800 MEV superconducting linac that is in the initial acceleration chain for the Fermilab accelerator complex. The RF system consists of a warm front-end with an ion source, RFQ and buncher cavities along with 25 superconducting…

Accelerator Physics · Physics 2023-11-13 P. Varghese , B. Chase , E. Cullerton , S. Raman , S. Ahmed , P. Hanlet , D. Klepec

Fermilab is committed to upgrading its accelerator complex towards the intensity frontier to pursue HEP research in the neutrino sector and beyond. The upgrade has two steps: 1) the Proton Improvement Plan (PIP), which is underway, has its…

Accelerator Physics · Physics 2017-05-04 C. M. Bhat

This paper presents the uTCA4.0-based BPM electronics for PIP-II, featuring four 250 MSPS ADCs and a Xilinx UltraScale+ MPSoC FPGA with 10 GbE uplink. Design elements include signal conditioning, clock, and thermal management. The FPGA…

Accelerator Physics · Physics 2025-09-22 Shengli Liu , Nathan Eddy , A. Semenov , Brian Fellenz

Proton beam dumps are prolific sources of mesons enabling a powerful technique to search for vector mediator coupling of dark matter to neutral pion and higher mass meson decays. By the end of the decade the PIP-II linac will be delivering…

The Fermilab Linac delivers 400 MeV H- beam to the rest of the accelerator chain. Providing stable intensity, energy, and emittance is key since it directly affects downstream machines. To counter fluctuations of Linac output due to various…

Accelerator Physics · Physics 2022-09-07 R. Sharankova , M. Mwaniki , K. Seiya , M. Wesley

Fermilab's Integrable Optics Test Accelerator is an electron storage ring designed for testing advanced accelerator physics concepts, including implementation of nonlinear integrable beam optics and experiments on optical stochastic…

Accelerator Physics · Physics 2013-01-29 S. Nagaitsev , A. Valishev , V. V. Danilov , D. N. Shatilov

Unforeseen particle accelerator interruptions, also known as interlocks, lead to abrupt operational changes despite being necessary safety measures. These may result in substantial loss of beam time and perhaps even equipment damage. We…

Accelerator Physics · Physics 2023-03-17 Sichen Li , Jochem Snuverink , Fernando Perez-Cruz , Andreas Adelmann

Many present and future accelerators must operate with high intensity beams when distortions induced by space charge forces are among major limiting factors. Betatron tune depression of above approximately 0.1 per cell leads to significant…

Accelerator Physics · Physics 2018-05-09 A. Romanov , A. Valishev , D. L. Bruhwiler , N. Cook , C. Hall

A collaboration between Fermilab and the Institute for High Energy Physics (IHEP), Beijing, has developed a beam position monitor for the IHEP test beam facility. This telescope is based on 5 stations of silicon strip detectors having a…

Instrumentation and Detectors · Physics 2011-01-27 R. Angstadt , W. Cooper , M. Demarteau , J. Green , S. Jakubowski , A. Prosser , R. Rivera , M. Turqueti , M. Utes , Xiao Cai

The Fermilab Side-Coupled Linac accelerates H-beam from 116 MeV to 400 MeV through seven 805 MHz modules. Twelve wire scanners are present in the Side Coupled Linac and four are present in the transfer line between the Linac and the Booster…

Accelerator Physics · Physics 2024-09-05 E. Chen , R. Sharankova , A. Shemyakin , J. Stanton

The study of beam transport is of central importance to the design and performance assessment of modern particle accelerators. In this paper, we benchmark two contemporary codes, DIMAD and BDSIM, the latter being a relatively new tracking…

Accelerator Physics · Physics 2007-05-23 R. Appleby , P. Bambade , O. Dadoun , A. Ferrari