Download or read book The Role of Polarized Positron Beam and Its Measurement Inan E E Linear Collider written by Erez Reinherz-Aronis and published by . This book was released on 2005 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Role of Polarized Positron Beam and Its Measurement in E e Linear Collider written by Erez Reinherz-Aronis and published by . This book was released on 2005 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Polarized Positron 2011 Proceedings Of The 6th Annual Workshop written by Wei Gai and published by World Scientific. This book was released on 2012-10-05 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is a collection of the contributions to the 6th Annual Workshop on Polarized Positron held in China. It provides updated information on polarized positron source R&D efforts for future high energy linear colliders and other research activities related to the polarized positron studies.The topics covered include: positron beams for linear colliders, but not limited to it, with the main items listed below:

Download or read book Polarized Positrons at a Future Linear Collider and the Final Focus Test Beam written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Having both the positron and electron beams polarized in a future linear ee− collider is a decisive improvement for many physics studies at such a machine. The motivation for polarized positrons, and a demonstration experiment for the undulator-based production of polarized positrons are reviewed. This experiment (''E-166'') uses the 50 GeV Final Focus Test electron beam at SLAC with a 1 m-long helical undulator to make (almost equal to) 10MeV polarized photons. These photons are then converted in a thin ((almost equal to) 0.5 radiation length) target into positrons (and electrons) with about 50% polarization.

Download or read book More Transverse Polarization Signatures of Extra Dimensions at Linear Colliders written by and published by . This book was released on 2003 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polarization of both electron and positron beams at a future linear collider (LC) allows for the measurement of transverse polarization asymmetries. These asymmetries have been shown to be particularly sensitive to graviton or other spin-2, s-channel exchanges in the process ee− 2!f{bar f} (F `"e) which allows for a doubling of the usual search reach. A question then arises as to whether other ee− processes also show comparable sensitivity. Here we extend our previous analysis to the set of final states e+e−, W+W−, 2[gamma] and 2Z as well as to the Moeller scattering process e−e−. We demonstrate that these reactions yield transverse polarization asymmetries which are somewhat less sensitive to graviton exchange than are those obtained in our earlier analysis for e+e− 2!f{bar f}.

Download or read book A Concept of a Polarized Positron Source for a Linear Collider written by Tsunehiko Omori and published by . This book was released on 2000 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Role of Polarized Positrons and Electrons in Revealing Fundamental Interactions at the Linear Collider written by Gudrid Moortgat-Pick and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of the Positron Polarization at an Helical Undulator Based Positron Source for the International Linear Collider ILC written by Karim Laihem and published by . This book was released on 2008 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Role of Positron Polarization for the Inital 250 GeV Stage of the International Linear Collider written by and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Polarized Positrons and Electons at the Linear Collider written by Gudrid Moortgat-Pick and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Increased Sensitivity for Asymmetry Measurements at Linear Colliders with Polarized Electron and Positron Beams written by Klaus Flöttmann and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Polarized Positrons and Electrons at the Linear Collider written by and published by . This book was released on 2008 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Assessing the Merits of Positron Polarization at a Linear Collider written by and published by . This book was released on 2002 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The possibility of polarized positron beams at a future linear collider has created much interest. At the 2001 Snowmass meeting, a study group (designated E3) included a subgroup whose charge was to closely examine the merits, as quantitatively as possible, of this option. The leading issues are outlined here, and a few physics examples are given. The deciding issues are, however, likely to be technological, as positron polarization would to be a very complex and expensive addition to the accelerator.

Download or read book Undulator Based Production of Polarized Positrons A Proposal for the 50 GeV Beam in the FFTB written by J. Turner and published by . This book was released on 2003 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The full exploitation of the physics potential of future linear colliders such as the JLC, NLC, and TESLA will require the development of polarized positron beams. In the proposed scheme of Balakin and Mikhailichenko [1] a helical undulator is employed to generate photons of several MeV with circular polarization which are then converted in a relatively thin target to generate longitudinally polarized positrons. This experiment, E-166, proposes to test this scheme to determine whether such a technique can produce polarized positron beams of sufficient quality for use in future linear colliders. The experiment will install a meter-long, short-period, pulsed helical undulator in the Final Focus Test Beam (FFTB) at SLAC. A low-emittance 50-GeV electron beam passing through this undulator will generate circularly polarized photons with energies up to 10 MeV. These polarized photons are then converted to polarized positrons via pair production in thin targets. Titanium and tungsten targets, which are both candidates for use in linear colliders, will be tested. The experiment will measure the flux and polarization of the undulator photons, and the spectrum and polarization of the positrons produced in the conversion target, and compare the measurement results to simulations. Thus the proposed experiment directly tests for the first time the validity of the simulation programs used for the physics of polarized pair production in finite matter, in particular the effects of multiple scattering on polarization. Successful comparison of the experimental results to the simulations will lead to greater confidence in the proposed designs of polarized positrons sources for the next generation of linear colliders. This experiment requests six-weeks of time in the FFTB beam line: three weeks for installation and setup and three weeks of beam for data taking. A 50-GeV beam with about twice the SLC emittance at a repetition rate of 30 Hz is required.

Download or read book Beam Dynamics in a Spectrometer for the Polarized Positron Production Experiment written by Yuri K. Batygin and published by . This book was released on 2006 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proposed experiment E-166 at SLAC is designed to demonstrate the possibility of producing longitudinally polarized positrons from circularly polarized photons to be used in future Linear Collider. The experimental set-up utilizes a low emittance 50 GeV electron beam passing through a helical undulator in the Final Focus Test Beam line of the SLAC accelerator. Circularly polarized photons generated by the electron beam in the undulator hit a target and produce electron-positron pairs. The purpose of the post-target spectrometer is to select the positron beam and to deliver it to a polarimeter whilst keeping the positron beam polarization as high as possible. This paper analyzes positron transmission and polarization in the E-166 spectrometer experiment. The positron transmission has a maximum value of 7% for a positron beam energy of 5.5 MeV, while positron polarization is approximately 60%.

Download or read book Polarimetry at a Future Linear Collider How Precise written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: At a future linear collider, a polarized electron beam will play an important role in interpreting new physics signals. Backgrounds to a new physics reaction can be reduced by choice of the electron polarization state. The origin of a new physics reaction can be clarified by measuring its polarization-dependence. This paper examines some options for polarimetry with an emphasis on physics issues that motivate how precise the polarization determination needs to be. In addition to Compton polarimetry, the possibility of using Standard Model asymmetries, such as the asymmetry in forward W-pairs, is considered as a possible polarimeter. Both ee− and ee− collider modes are considered.

Download or read book A Polarized Positron Beam for Linear Collides written by Tsunehiko Omori and published by . This book was released on 1999 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: