Search Results

Advanced search parameters have been applied.
open access

The US Muon Accelerator Program

Description: An accelerator complex that can produce ultra-intense beams of muons presents many opportunities to explore new physics. A facility of this type is unique in that, in a relatively straightforward way, it can present a physics program that can be staged and thus move forward incrementally, addressing exciting new physics at each step. At the request of the US Department of Energy's Office of High Energy Physics, the Neutrino Factory and Muon Collider Collaboration (NFMCC) and the Fermilab Muon C… more
Date: May 1, 2010
Creator: Torun, Y.; Kirk, H.; Bross, A.; Geer, Steve; Shiltsev, Vladimir & Zisman, M.
Partner: UNT Libraries Government Documents Department
open access

Monte Carlo simulations of muon production

Description: Muon production requirements for a muon collider are presented. Production of muons from pion decay is studied. Lithium lenses and solenoids are considered for focusing pions from a target, and for matching the pions into a decay channel. Pion decay channels of alternating quadrupoles and long solenoids are compared. Monte Carlo simulations are presented for production of {pi} {yields} {mu} by protons over a wide energy range, and criteria for choosing the best proton energy are discussed.
Date: March 1, 1995
Creator: Palmer, R. B.; Gallardo, J. C.; Fernow, R. C.; Torun, Y.; Neuffer, D. & Winn, D.
Partner: UNT Libraries Government Documents Department
open access

High-energy high-luminosity {mu}{sup +}{mu}{sup {minus}} collider design

Description: We discuss the design of a high luminosity (l0{sup 35} cm-{sup {minus}2} s{sup {minus}1}), high energy (2 + 2 TeV) {mu}{sup +}{mu}{sup {minus}} collider, starting from the proton accelerator needed to generate the muon beams and proceeding through the muon storage ring.
Date: July 1, 1995
Creator: Palmer, R. B.; Fernow, R.; Gallardo, J. C.; Lee, Y. Y.; Torun, Y.; Neuffer, D. et al.
Partner: UNT Libraries Government Documents Department
open access

Recent RF results from the MuCool test area

Description: The MuCool Experiment has been continuing to take data with 805 and 201 MHz cavities in the MuCool Test Area (MTA). The system uses rf power sources from the Fermilab Linac. Although the experimental program is primarily aimed at the Muon Ionization Cooling Experiment (MICE), we have been studying the dependence of rf limits on frequency, cavity material, high magnetic fields, gas pressure, coatings, etc. with the general aim of understanding the basic mechanisms involved. The 201 MHz cavity, e… more
Date: June 1, 2007
Creator: Norem, J.; Bross, A.; Moretti, A.; Qian, Z.; Huang, D.; Torun, Y. et al.
Partner: UNT Libraries Government Documents Department
open access

Effect of high solenoidal magnetic fields on breakdown voltages of high vacuum 805 MHz cavities

Description: There is an on going international collaboration studying the feasibility and cost of building a muon collider or neutrino factory [1,2]. An important aspect of this study is the full understanding of ionization cooling of muons by many orders of magnitude for the collider case. An important muon ionization cooling experiment, MICE [3], has been proposed to demonstrate and validate the technology that could be used for cooling. Ionization cooling is accomplished by passing a high-emittance muon… more
Date: October 1, 2005
Creator: Moretti, A.; Bross, A.; Geer, S.; Qian, Z.; Norem, J.; Li, D. et al.
Partner: UNT Libraries Government Documents Department
open access

The rf experimental program in the fermilab mucool test area

Description: The rf R&D program for high-gradient, low frequency cavities to be used in muon cooling systems is underway in the Fermilab MUCOOL Test Area. Cavities at 805 and 201 MHz are used for tests of conditioning techniques, surface modification and breakdown studies. This work has the Muon Ionization Cooling Experiment (MICE) as its immediate goal and efficient muon cooling systems for neutrino sources and muon colliders as the long term goal. We study breakdown and dark current production under a… more
Date: May 20, 2005
Creator: Norem, J.; Sandstrom, R.; Bross, A.; Moretti, A.; Qian, Z.; Torun, Y. et al.
Partner: UNT Libraries Government Documents Department
open access

The MUCOOL RF Program

Description: Efficient muon cooling requires high RF gradients in the presence of high (3T) solenoidal fields. The Muon Ionization Cooling Experiment (MICE) also requires that the x-ray production from these cavities is low, in order to minimize backgrounds in the particle detectors that must be located near the cavities. These cavities require thin Be windows to ensure the highest fields on the beam axis. In order to develop these cavities, the MUCOOL RF Program was started about 6 years ago. Initial measu… more
Date: June 26, 2006
Creator: Norem, J.; Bross, A.; Moretti, A.; Norris, B.; Qian, Z.; Torun, Y. et al.
Partner: UNT Libraries Government Documents Department
open access

The Interactions of Surface Damage on RF Cavity Operation

Description: Studies of low frequency RF systems for muon cooling has led to a variety of new techniques for looking at dark currents, a new model of breakdown, and, ultimately, a model of RF cavity operation based on surface damage. We find that cavity behavior is strongly influenced by the spectrum of enhancement factors on field emission sites. Three different spectra are involved: one defining the initial state of the cavity, the second determined by the breakdown events, and the third defining the equi… more
Date: June 26, 2006
Creator: Norem, J.; Hassanein, A.; Insepov, Z.; Moretti, A.; Qian, Z.; Bross, A. et al.
Partner: UNT Libraries Government Documents Department
open access

The MuCool Test Area and RF Program

Description: The MuCool RF Program focuses on the study of normal conducting RF structures operating in high magnetic field for applications in muon ionization cooling for Neutrino Factories and Muon Colliders. Here we give an overview of the program, which includes a description of the test facility and its capabilities, the current test program, and the status of a cavity that can be rotated in the magnetic field, which allows for a detailed study of the maximum stable operating gradient vs. magnetic fiel… more
Date: May 1, 2010
Creator: Torun, Y.; Huang, D.; Norem, J.; Palmer, Robert B.; Stratakis, Diktys; Bross, A. et al.
Partner: UNT Libraries Government Documents Department
open access

The MuCool Test Area and RF Program

Description: The MuCool RF Program focuses on the study of normal conducting RF structures operating in high magnetic field for applications in muon ionization cooling for Neutrino Factories and Muon Colliders. This paper will give an overview of the program, which will include a description of the test facility and its capabilities, the current test program, and the status of a cavity that can be rotated in the magnetic field which allows for a more detailed study of the maximum stable operating gradient v… more
Date: May 1, 2010
Creator: Bross, A. D.; Jansson, A.; Moretti, A.; Yonehara, K.; Huang, D.; Torun, Y. et al.
Partner: UNT Libraries Government Documents Department
open access

RF tests of an 805 MHz pillbox cavity at Lab G of Fermilab

Description: We report recent high power RF tests on an 805 MHz RF pillbox cavity with demountable windows for beam apertures at Lab G of Fermilab, a dedicated facility for testing of MUCOOL (muon cooling) components. The cavity is installed inside a superconducting solenoidal magnet. A 12 MW peak RF power klystron is used for the tests. The cavity has been processed both with and without magnetic field. Without magnetic field, a gradient of 34 MV/m was reached rather quickly with very low sparking rate. In… more
Date: May 1, 2003
Creator: Li, Derun; Corlett, J.; MacGill, R.; Wallig, J.; Zisman, M.; Moretti, A. et al.
Partner: UNT Libraries Government Documents Department
open access

The effects of surface damage on RF cavity operation

Description: We describe a model of damage in rf cavities and show how this damage can limit cavity operation. We first present a review of mechanisms that may or may not affect the ultimate fields that can be obtained in rf cavities, assuming that mechanical stress explains the triggers of rf breakdown events. We present a method of quantifying the surface damage caused by breakdown events in terms of the spectrum of field enhancement factors, Beta, for asperities on the surface. We then model an equilibri… more
Date: April 14, 2006
Creator: Hassanein, A.; Insepov, Z.; Norem, J.; Moretti, A.; Qian, Z.; Bross, A. et al.
Partner: UNT Libraries Government Documents Department
open access

Recent RF Results from the MuCool Test Area

Description: The MuCool Experiment has been continuing to take data with805 and 201 MHz cavities in the MuCool Test Area. The system uses rfpower sources from the Fermilab Linac. Although the experimental programisprimarily aimed at the Muon Ionization Cooling Experiment (MICE), wehave been studying the dependence of rf limits on frequency, cavitymaterial, high magnetic fields, gas pressure, coatings, etc. with thegeneral aim of understanding the basic mechanisms involved. The 201 MHzcavity, essentially a p… more
Date: June 18, 2007
Creator: Norem, J.; Bross, A.; Moretti, A.; Qian, Z.; Huang, D.; Torun,Y. et al.
Partner: UNT Libraries Government Documents Department
open access

Proposal to upgrade the MIPP experiment

Description: The upgraded MIPP physics results are needed for the support of NuMI projects, atmospheric cosmic ray and neutrino programs worldwide and will permit a systematic study of non-perturbative QCD interactions. The MIPP TPC is the largest contributor to the MIPP event size by far. Its readout system and electronics were designed in the 1990's and limit it to a readout rate of 60 Hz in simple events and {approx} 20 Hz in complicated events. With the readout chips designed for the ALICE collaboration… more
Date: September 1, 2006
Creator: Isenhower, D.; Sadler, M.; Towell, R.; Watson, S.; Peterson, R. J.; Baker, W. et al.
Partner: UNT Libraries Government Documents Department
open access

Accelerator Design Concept for Future Neutrino Facilities

Description: This document summarizes the findings of the Accelerator Working Group (AWG) of the International Scoping Study (ISS) of a Future Neutrino Factory and Superbeam Facility. The work of the group took place at three plenary meetings along with three workshops, and an oral summary report was presented at the NuFact06 workshop held at UC-Irvine in August, 2006. The goal was to reach consensus on a baseline design for a Neutrino Factory complex. One aspect of this endeavor was to examine critically t… more
Date: February 3, 2008
Creator: ISS Accelerator Working Group
Partner: UNT Libraries Government Documents Department
Back to Top of Screen