A5065418812- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Gyrotron and Vacuum Electronics Research
- Particle Detector Development and Performance
- Plasma Diagnostics and Applications
- Photonic and Optical Devices
- Optical Polarization and Ellipsometry
- Magnetic confinement fusion research
- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Theoretical and Computational Physics
- Electromagnetic Simulation and Numerical Methods
- Optical Systems and Laser Technology
- Nonlinear Dynamics and Pattern Formation
- Nuclear Physics and Applications
- Electrostatic Discharge in Electronics
- Electromagnetic Compatibility and Measurements
- Radiation Detection and Scintillator Technologies
- Electromagnetic Compatibility and Noise Suppression
- Research Data Management Practices
- Distributed and Parallel Computing Systems
- Tuberous Sclerosis Complex Research
- Radiation Therapy and Dosimetry
Fermi National Accelerator Laboratory
2012-2024
Goethe University Frankfurt
2014
Fermi Research Alliance
2002-2007
Cornell University
2002
Wayne State University
1998
This paper presents the physics case for a new high-energy, ultra-high statistics neutrino scattering experiment, NuSOnG (Neutrino Scattering on Glass). experiment uses Tevatron-based beam to obtain over an order of magnitude higher than presently available purely weak processes ν μ + e - → and . A sample Deep Inelastic events which is two orders larger past samples will also be obtained. As result, unique among present planned experiments its ability probe couplings Beyond Standard Model...
We present our observations of the longitudinal bunch dynamics in Tevatron for uncoalesced proton bunches at 150 GeV and coalesced 980 GeV. have observed long-term (>15 minutes) coherent oscillations protons that preserve already existing from upstream accelerators. A single-bunch instability large intensity has also been observed.
After 30 years of operation, the Cockcroft-Walton based injector at Fermi National Accelerator Laboratory has been replaced by a new beam line including dimpled magnetron 35 keV source in combination with 750 four-rod radio frequency quadrupole (RFQ). The is followed existing drift tube linac. Prior to installation, test was built which included and RFQ number measurement instrumentation. first showed an output energy deviation greater than 2.5%. Other problems also up led investigations...
In the Tevatron collider, protons and antiprotons share same beam pipe. This poses a challenge in measurement of tunes for both species simultanously because possibility signal contamination from other species. The tune each bunch is also very different beam-beam effects parasitic crossing points. means that diagnostics must be able to differentiate between anti-protons, it has measure bunch. There are three pickups used Tevatron: 1.7 GHz Schottky pickups, 21.4 MHz baseband pickups. These...
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....
Simultaneous tune and coupling feedback were successfully implemented during RHIC run 6. In this paper we describe the measurement control hardware software used to accomplish this, present some of results, discuss areas that require further investigation, finally offer a few comments on possible implications these results for LHC commissioning.
The new FNAL Injector Line with a circular dimple magnetron ion source has been operational since December of 2012. Since the injector came on line there have variations in H- beam current flattop observed near downstream end Linac. Several different cathode geometries including hollow suggested by Dudnikov [1] were tried. Previous studies also showed that mixtures hydrogen and nitrogen had an effect noise [2]. We expanded those trying ranging from (0.25% nitrogen, 99.75% hydrogen) to (3%...
Bunches in the Tevatron are known to exhibit longitudinal oscillations which persist indefinitely. These colloquially called ``dancing bunches.'' Although dancing proton bunches do not cause single bunch emittance growth or beam loss at injection, they lead lengthening collisions. In operations, a damper has been built stops this dance and damps out coupled modes. Recent theoretical work predicts that can also be stopped by an appropriate change distribution. This paper describes experiments...
The Tevatron longitudinal dampers were built in 2002 to stop the proton beam from spontaneously blowing up during high energy physics. system has been operational since then and very successful keeping stable. In October 2011, will be shutdown decommissioned. goal of this paper is document 9 year experience operation these dampers, account for design choices made at time, describe its commissioning, performance working life. Included a discussion on type instability which required damper built.
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...
The field flatness of any radio frequency quadrupole (RFQ) is an important parameter that needs to be carefully tuned because it can affect beam transmission efficiency. In four-rod RFQs, the heights a set tuning plates determine quality flatness. goals this paper are (a) show by using lumped circuit model RFQ, profile for plate height distribution quickly calculated, (b) derive perturbative solution so insights into physics process and its effects understood, (c) compare predicted profiles...
The aging Fermilab Booster RF system needs an upgrade to support the future experimental program. important feature of is a substantial enhancement requirements for accelerating cavities. new include enlargement cavity beam pipe aperture, increase voltage and in repetition rate. modification present traditional parallel biased ferrite cavities rather challenging. An alternative rebuilding design construct perpendicular cavities, which potentially offer number advantages. evaluation...
The Fermilab Booster is being upgraded under the Proton Improvement Plan (PIP) to be capable of providing a proton flux $2.25^{17}$ protons per hour. intensity cycle will remain at present operational $4.3^{12}$ pulse, however beam rate going increased from 7.5 Hz 15 Hz. One biggest challenges maintain loss power while doubling flux. Under PIP, there has been large effort in studies and simulations better understand mechanisms loss. goal reduce it by half correcting controlling dynamics...
A new test stand at Fermi National Accelerator Laboratory (FNAL) is being constructed to carry out experiments develop and upgrade the present magnetron-type sources of H(-) ions up 80 mA 35 keV in context Proton Improvement Plan. The aim this plan provide high-power proton beams for FNAL. technical details construction layout are presented, along with a prospective set diagnostics monitor sources.