Publications (11)
Tunneling study of cavity grade Nb: possible magnetic scattering at the surface
T. Proslier, J. F. Zasadzinski, L. Cooley +5
Tunneling spectroscopy was performed on Nb pieces prepared by the same processes used to etch and clean superconducting radio frequency (SRF) cavities. Air exposed, electropolished…
Beam Dynamics problems in a muon collider
R. B. Palmer, J. C. Gallardo, R. C. Fernow +15
We discuss the various beam dynamics problems in muon collider systems, starting from the proton accelerator needed to generate the muon beams and proceeding through the muon stora…
Booster 6-GeV Study
Xi Yang, Charles M. Ankenbrandt, William A. Pellico +3
Since a wider aperture has been obtained along the Booster beam line, this opens the opportunity for Booster running a higher intensity beam than ever before. Sooner or later, the…
Improvement and protection of niobium surface superconductivity by Atomic Layer Deposition and heat treatment
T. Proslier, J. Zasadzinski, J. Moore +6
A method to treat the surface of Nb is described which potentially can improve the performance of superconducting RF cavities. We present tunneling and x-ray photoemission spectros…
Experimental Estimate of Beam Loading and Minimum rf Voltage for Acceleration of High Intensity Beam in the Fermilab Booster
Xi Yang, C. Ankenbrandt, J. Norem
The difference between the rf voltage seen by the beam and the accelerating voltage required to match the rate of change of the Booster magnetic field is used to estimate the energ…
MICE: the Muon Ionization Cooling Experiment. Step I: First Measurement of Emittance with Particle Physics Detectors
U. Bravar, M. Bogomilov, Y. Karadzhov +144
The Muon Ionization Cooling Experiment (MICE) is a strategic R&D project intended to demonstrate the only practical solution to providing high brilliance beams necessary for a neut…
Muon Collider Design
R. Palmer, A. Sessler, A. Skrinsky +56
Muon Colliders have unique technical and physics advantages and disadvantages when compared with both hadron and electron machines. They should thus be regarded as complementary. P…
An integrated Approach to Understanding Vacuum Arcs
J. Norem, Z Insepov, A. Hassanein
Although used in the design and costing of large projects such as linear colliders and tokamaks, the theory of vacuum arcs and gradient limits is not well understood. Almost 120 ye…
Understanding Vacuum Arcs and Gradient Limits
J. Norem, Z. insepov, A. Hassanein
Although a general model of vacuum arcs and gradient limits would be widely useful, roughly 120 years after the first good experimental data on these arcs, this important field con…
Modeling of High-Gradient Vacuum Breakdown
A. Ainabayev, B. Berdenova, J. Norem +1
Comsol finite element technique was applied to study heating and cooling of a microspot on the cathode surface. The reasons why there seems to be no common model for vacuum arcs, i…
Modeling Vacuum Arcs
Z. Insepov, J. Norem, T. Proslier +3
We are developing a model of vacuum arcs. This model assumes that arcs develop as a result of mechanical failure of the surface due to Coulomb explosions, followed by ionization of…