119847891
The 2.5PN linear momentum flux and associated recoil from inspiralling compact binaries in quasi-circular orbits: Nonspinning case
Anisotropic emission of gravitational waves (GWs) from inspiralling compact binaries leads to the loss of linear momentum and hence gravitational recoil of the system. The loss rate of linear momentum in the far-zone of the source (a nonspinning binary system of black holes in quasicircular orbit) is investigated at the 2.5 post-Newtonian (PN) order and used to provide an analytical expression in harmonic coordinates for the 2.5PN accurate recoil velocity of the binary accumulated in the inspiral phase. We find that the recoil velocity at the end of the inspiral phase (i.e at the innermost stable circular orbit (ISCO)) is maximum for a binary with symmetric mass ratio of \nu~0.2 and is roughly about ~4.58 km/s. Going beyond inspiral, we also provide an estimate of the more important contribution to the recoil velocity from the plunge phase. Again the recoil velocity at the end of the plunge, involving contributions both from inspiral and plunge phase, is maximum for a binary with \nu~0.2 and is of the order of ~180 km/s.
13362865
Parametrized tests of post-Newtonian theory using Advanced LIGO and Einstein Telescope
General relativity has very specific predictions for the gravitational waveforms from inspiralling compact binaries obtained using the post-Newtonian (PN) approximation. We investigate the extent to which the measurement of the PN coefficients, possible with the second generation gravitational-wave detectors such as the Advanced Laser Interferometer Gravitational-Wave Observatory (LIGO) and the third generation gravitational-wave detectors such as the Einstein Telescope (ET), could be used to test post-Newtonian theory and to put bounds on a subclass of parametrized-post-Einstein theories which differ from general relativity in a parametrized sense. We demonstrate this possibility by employing the best inspiralling waveform model for nonspinning compact binaries which is 3.5PN accurate in phase and 3PN in amplitude. Within the class of theories considered, Advanced LIGO can test the theory at 1.5PN and thus the leading tail term. Future observations of stellar mass black hole binaries by ET can test the consistency between the various PN coefficients in the gravitational-wave phasing over the mass range of 11-44M(circle dot). The choice of the lower frequency cutoff is important for testing post-Newtonian theory using the ET. The bias in the test arising from the assumption of nonspinning binaries is indicated.
110948561
PXIE: Project X Injector Experiment
A multi-MW proton facility, Project X has been proposed and is currently under development at Fermilab. As part of this development program, we are constructing a prototype of the front end of the Project X linac at Fermilab. The construction and successful operations of this facility will validate the concept for the Project X front end, thereby minimizing the primary technical risk element within the Project. The Project X Injector Experiment (PXIE) can be constructed over the period FY12-16 and will include an H- ion source, a CW 2.1-MeV RFQ and two SC cryomodules providing up to 30 MeV energy gain at an average beam current of 1 mA. Successful operations of the facility will demonstrate the viability of novel front end technologies that will find applications beyond Project X in the longer term.
20904594
Simulation of the Recycler Ring dynamic aperture
The Fermilab Recycler Ring is being built at Fermilab to support the Run-II and beyond physics goals of Fermilab. The role of the Recycler Ring is to provide more antiprotons for the Tevatron, which proportionally increases the luminosity. This paper describes the Recycler Ring lattice design and simulations of the dynamic aperture using data from the some of the magnets installed in the ring.
42818936
Summary of the TeV 33 Working Group
This summary of the TeV33 working group at Snowmass reports on work in the areas of Tevatron store parameters, the beam-beam interaction, Main Injector intensity (slip stacking), antiproton production, and electron cooling. I. OVERVIEW OF TEV33 The goal of the TeV33 project is to develop a plan for the Fermilab Tevatron Collider beyond the year 2000 when the Main Injector project will be finished and collider Run II is expected to be well underway. The TeV2000 committee report [1] suggests a goal of 30 fb of proton-antiproton collisions at 2 TeV in the center of mass system by the year 2006. The physics potential of such a data sample is summarized in the committee’s report and is described in more detail in the report of the TeV2000 Study Group [2]. The goal of obtaining a sample of 30 fb of protonantiproton collisions is widely believed to be technically feasible, but it is uncertain whether it can be achieved within the likely fiscal and schedule constraints. An upgrade to a higher energy or a higher luminosity proton-proton collider is also technically possible but, based on performance, cost, and schedule considerations, is judged to be an unrealistic competitor for the Large Hadron Collider (LHC). The purpose of the TeV33 group and, in particular, the Snowmass study group, is to develop a realistic plan for TeV33 that can form the basis for future decisions. The TeV33 project assumes the successful completion of the Main Injector project and other upgrade projects that are associated with Run II. Some of the important elements of the Run II upgrade are: 1. Main Injector with both physical and dynamic apertures greatly exceeding those available with the existing Main Ring. 2. Antiproton recovery, including the construction of a “Recycler” ring in the Main Injector tunnel. 3. Antiproton source improvements in targeting and beam cooling. While the details of the TeV33 plan are not well defined, many of the major considerations are already clear. These are: 1. The antiproton production rate must be improved by about a factor of 5. 2. The antiproton cooling must be improved to accommodate the increased flux. The current plan is to use a. 4-8 GHz stochastic cooling in the existing Debuncher and Accumulator Rings, and b. electron cooling in the Recycler Ring. 3. The existing detector technology (with modest upgrades) must be capable of analyzing the collisions for rare processes. The important considerations for the accelerator are: a. Limiting the number of interactions per crossing to a sufficiently small value by using roughly 100 bunches in the Tevatron, b. Reducing the peak luminosity (luminosity leveling) to further reduce the number of interactions per crossing, and c. Maintaining low backgrounds. 4. The proton and antiproton beams must be kept well separated in the Tevatron except at the desired collision points to avoid the adverse effects of the beam-beam interaction. Obtaining adequate separation becomes increasingly difficult as the number of bunches is increased to 100 or more bunches. At Snowmass we developed some of the aspects of the TeV33 plan, but not all the important issues were covered. This paper is intended to report the work completed in conjunction with Snowmass study, and is not a balanced presentation of the current thinking on all the important elements of the TeV33 project. II. ELEMENTS OF TEV33 A. Tevatron Store Parameters The performance of a TeV33 scenario is determined by the average production rate of events that can be analyzed to study interesting physics processes. The study described below considered various initial store parameters and calculated the dependence of the integrated luminosity on several possible choices of parameters. The more delicate question of whether the events produced could be analyzed by a given detector was not considered. 1. The Luminosity Calculation It is straight-forward to calculate the luminosity (L) by integrating the beam phase-space distributions. A relatively compact expression can be obtained when the distributions are assumed to be gaussian in transverse and longitudinal positions. In this case the luminosity per interaction region is given by L = + ( ) − ( )   
35394655
Magnetic field measurements of Fermilab main injector dipoles
Measurements of the Fermilab Main Injector dipoles using a partially redundant system of integrated and point measurements were carried out for quality assurance. Additional special measurements studied the hysteretic field strength. Results from these measurements are presented.
122682011
Magnetic field measurements of the initial Fermilab Main Injector production quadrupoles
A large sample of the 2.54-meter quadrupoles for lattice matching in the Fermilab Main Injector have been fabricated and measured. The resulting properties are reported and compared to the accelerator requirements.