J. Steimel

Fermi National Accelerator Laboratory

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L. Prost

Fermi National Accelerator Laboratory

B. Hanna

Fermi National Accelerator Laboratory

A. Shemyakin

Fermi National Accelerator Laboratory

Jonathan Edelen

RadiaSoft (United States)

Brian Chase

Institut des Sciences de l'Evolution de Montpellier

A. Saini

Fermi National Accelerator Laboratory

R. Webber

Fermi National Accelerator Laboratory

R. Andrews

Fermi National Accelerator Laboratory

V. Lalitha Sista

Fermi National Accelerator Laboratory

T. Khabiboulline

Fermi National Accelerator Laboratory

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Fermi National Accelerator Laboratory

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Lawrence Berkeley National Laboratory

Argonne National Laboratory

SLAC National Accelerator Laboratory

Brookhaven National Laboratory

Universities Research Association

Illinois Institute of Technology

University of Chicago

European Organization for Nuclear Research

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Chracterization of the beam from the RFQ of the PIP-II Injector Test

OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (2017)

A. Shemyakin A. Saini Carneiro. J.-P.V. Scarpine L. Prost

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The PIP-II Conceptual Design Report

M.J. Ball A. Burov Brian Chase Anindya Chakravarty A. Chen

improvements to achieve multi-MW capabilities at Fermilab. PIP-II is based on three major thrusts. They are (1) the recently completed upgrades to the Recycler and Main Injector (MI) for the NOvA experiment, (2) the Proton Improvement Plan [3] currently underway, and (3) the Project X Reference Design [4]. Note that: The Proton Improvement Plan (PIP) consolidates a set of improvements to the existing Linac, Booster, and Main Injector (MI) aimed at supporting 15 Hz Booster beam operation. In combination, the NOvA upgrades and PIP create a capability of delivering 700 kW beam power from the Main Injector at 120 GeV; The scope of the Project X Reference Design Report was aimed well beyond PIP. It described a complete concept for a multi-MW proton facility that could support a broad particle physics program based on neutrino, kaon, muon, and nucleon experiments [5,6]. The Project X conceptual design has evolved over a number of years, incorporating continuous input on physics research goals and advances in the underlying technology development programs [7,8,9]. PIP-II, to high degree, inherits these goals as the goals for future developments and upgrades. This document (PIP-II Reference Design Report) describes an initial step in the development of the Fermilab accelerating complex. The plan described in this Report balances the far-term goals of the Laboratory's long baseline neutrino mission with the near- and mid-term goals identified at the Snowmass workshop [10] and endorsed by the P5 report [1].

Fermilab

Booster (rocketry)

Conceptual design

Scope (computer science)

10.2172/1346823

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Citations (35)

A closed-orbit suppression circuit for a Main Ring transversal damper

AIP conference proceedings (1997)

Hengjie Ma J. Steimel J. Marriner Jim Crisp

The signals of a transversal damper pickup usually have a certain number of common-mode components due to the off-center beam at the location. For the limit in the output power and the required minimum dynamic range of the feedback system, this common-mode component must be suppressed as much as possible. An analog front end is being developed for a transversal damper of the Main Ring at Fermilab (1) for this purpose. The front end features a balanced feedforward circuit and a possible single-ended negative feedback loop. Properly set, the time constant of the feedforward circuit ensures that the slowly changing closed-orbit component will be adaptively canceled, while the betatron oscillation components will survive in the output.

Transversal (combinatorics)

Betatron

Feed forward

Oscillation (cell signaling)

Orbit (dynamics)

10.1063/1.52321

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Citations (1)

Status of the warm front end of PIP-II injector test

arXiv (Cornell University) (2018)

A. Shemyakin Marcelo A. Alvarez R. Andrews Curtis Baffes J.-P. Carneiro

The Proton Improvement Plan II (PIP-II) at Fermilab is a program of upgrades to the injection complex. At its core is the design and construction of a CW compatible, pulsed H- SRF linac. To validate the concept of the front-end of such machine, a test accelerator known as PIP-II Injector Test (PIP2IT) is under construction. It includes a 10 mA DC, 30 keV H- ion source, a 2 m-long Low Energy Beam Transport (LEBT), a 2.1 MeV CWRFQ, followed by a Medium Energy Beam Transport (MEBT) that feeds the first of 2 cryomodules increasing the beam energy to about 25 MeV, and a High Energy Beam Transport section (HEBT) that takes the beam to a dump. The ion source, LEBT, RFQ, and initial version of the MEBT have been built, installed, and commissioned. This report presents the overall status of the warm front end.

10.48550/arxiv.1803.08940

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Observation and cure of longitudinal coupled-bunch instabilities in the Fermilab Main Ring

Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366) (2002)

S. Assadi I. Kourbanis Dave McGinnis J. Steimel

One goal of the Fermilab Main Ring accelerator during the fixed target run is to keep the longitudinal beam oscillations as small as possible. It is found that when the proton beam intensity reaches a certain value, longitudinal beam oscillations rapidly grow. This motion can be explained by the longitudinal beam instability model. Installed active feedback system has successfully eliminated the instabilities and record intensities are achieved. We discuss the observations that indicate the damper systems are necessary. The results of the instability growth measurements are compared with a simple model.

Fermilab

Intensity

10.1109/pac.1997.751196

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High-Intensity Proton RFQ Accelerator Fabrication Status for PXIE

6th Int. Particle Accelerator Conf. (IPAC'15), Richmond, VA, USA, May 3-8, 2015 (2015)

A. Lambert R. Andrews Curtis Baffes Paolo Berrutti A. DeMello

PXIE is a prototype front end system [1] for the proposed PIP-II accelerator upgrade at Fermilab. An integral component of the front end is a 162.5 MHz, normal conducting, continuous wave (CW), radiofrequency quadrupole (RFQ) cavity that was designed and is being fabricated by LBNL. This RFQ will accelerate a continuous stream of up to 10mA of H- ions from 30 keV to 2.1 MeV. The four-vane, 4.45 meter long RFQ consists of four modules, each constructed from 2 pairs of identical modulated vanes. Vane modulations are machined using a custom carbide cutter designed at LBNL. Other machined features include ports for slug tuners, pi-mode rods, sensing loops, vacuum pumps and RF couplers. Vanes at the entrance and exit possess cutbacks for RF matching to the end plates. The vanes and pi-mode rods are bonded via hydrogen brazing with Cusil wire alloy. The brazing process mechanically bonds the RFQ vanes together and vacuum seals the module along its length. Vane fabrication is successfully completed, and the braze process has proved successful. Delivery of the full RFQ beam-line is expected in the middle of 2015.

Radio-frequency quadrupole

Collimator

Rod

Upgrade

Brazing

10.18429/jacow-ipac2015-wepty045

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Citations (2)

THE SIX-CAVITY TEST - DEMONSTRATED ACCELERATION OF BEAM WITH MULTIPLE RF CAVITIES AND A SINGLE KLYSTRON*

J. Steimel J.-P. Carneiro Brian Chase E. Cullerton B. Hanna

The High Intensity Neutrino Source (HINS) ‘SixCavity Test’ has demonstrated the use of high power RF vector modulators to control multiple RF cavities driven by a single high power klystron to accelerate a nonrelativistic beam. Installation of 6 cavities in the existing HINS beamline has been completed and beam measurements have been made. We present data showing the energy stability of the 7 mA proton beam accelerated through the six cavities from 2.5 MeV to 3.4 MeV..

Klystron

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PIP-II Injector Test Warm Front End: Commissioning Update

arXiv (Cornell University) (2018)

L. Prost R. Andrews Curtis Baffes J.-P. Carneiro Brian Chase

The Warm Front End (WFE) of the Proton Improvement Plan II Injector Test at Fermilab has been constructed to its full length. It includes a 15-mA DC, 30-keV H- ion source, a 2 m-long Low Energy Beam Transport (LEBT) with a switching dipole magnet, a 2.1 MeV CW RFQ, followed by a Medium Energy Beam Transport (MEBT) with various diagnostics and a dump. This report presents the commissioning status, focusing on beam measurements in the MEBT. In particular, a beam with the parameters required for injection into the Booster (5 mA, 0.55 ms macro-pulse at 20 Hz) was transported through the WFE.

Booster (rocketry)

Fermilab

Beam energy

10.48550/arxiv.1806.05708

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Citations (4)

Beam Commissioning Status and Results of the FNAL PIP2IT Linear Accelerator RFQ

28th Linear Accelerator Conf. (LINAC'16), East Lansing, MI, USA, 25-30 September 2016 (2017)

J. Steimel Curtis Baffes Paolo Berrutti Jean-Paul Carneiro Auralee Edelen

An H⁻ beam was accelerated through a continuous wave (CW) capable, 4-vane, radio frequency quadrupole (RFQ) at Fermilab that was designed and constructed at Berkeley Lab. This RFQ is designed to accelerate up to 10 mA H⁻ beam from 30 keV to 2.1 MeV in a test accelerator (PIP2IT). This paper presents results of specification verification and commissioning.

Radio-frequency quadrupole

Fermilab

10.18429/jacow-linac2016-thplr065

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Citations (5)

BEAM INSTRUMENTATION FOR HIGH-INTENSITY, MULTI-GeV SUPERCONDUCTING LINACS*

E. Gianfelice B. Hanna V. Scarpine J. Steimel R. Webber

A number of high-intensity, multi-GeV superconducting RF (SRF) proton or H linacs are being developed or proposed throughout the world. The intensity frontier, having been identified as one leg of the future of particle physics, can be addressed by the development of such a linac. All these accelerators will place strict demands on the required beam diagnostics, especially in the development of none or minimum invasive monitors such as beam profile and halo monitors. An H / proton beam test facility is currently under construction and commissioning at Fermilab. It serves as a test bed for the development of critical beam manipulation and diagnostics components for the anticipated Project X, Fermilab’s SRF multi-MW, multiGeV linac. The paper will discuss the beam diagnostic needs for these high-intensity linacs in particular the role of the Project X test facility for development and testing of these beam instrumentation systems.

Fermilab

Instrumentation

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Citations (3)