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We describe a scheme for producing polarised positrons at the ILC from polarised X-rays created by Compton scattering of a few-GeV electron beam off a CO2 or YAG laser. This scheme is very energy effective using high finesse laser cavities…

In-line polarimeters perform non-destructive polarization measurements of optical signals, and play a critical role in monitoring and controlling the polarization environment in for example optical networks. While current in-line…

Optics · Physics 2015-12-10 J. P. Balthasar Müller , Kristjan Leosson , Federico Capasso

A novel polarimeter based on the asymmetry in the spacial distribution of synchrotron radiation will make for a fine addition to the existing M{\o}ller and Compton polarimeters. The spin light polarimeter consists of a set of wiggler magnet…

Accelerator Physics · Physics 2014-03-21 Prajwal Mohanmurthy , Dipangkar Dutta

Constancy and anisotropy of vacuum refractive index serves as a strong way to probe the predictions of theories beyond the standard model (BSM), especially those that predict breaking of local Lorentz and CPT symmetries. For photons of…

Nuclear Experiment · Physics 2018-07-05 Prajwal Mohanmurthy , Dipangkar Dutta

This paper discusses the latest progress in the development of GRAPE (Gamma-Ray Polarimeter Experiment), a hard X-ray Compton Polarimeter. The purpose of GRAPE is to measure the polarization of hard X-rays in the 50-300 keV energy range. We…

Astrophysics · Physics 2017-08-23 J. S. Legere , P. Bloser , J. R. Macri , M. L. McConnell , T. Narita , J. M. Ryan

Positron Emission Tomography (PET) is a medical imaging modality that utilizes positron-emitting isotopes, such as Ga-68 and F-18, for many diagnostic purposes. The positron annihilates with an electron from the surrounding area, creating…

Polarized X-ray source is an important probe for many fields such as fluorescence imaging, magnetic microscopy, and nuclear physics research. All-optical inverse Compton scattering source (AOCS) based on laser wakefield accelerator (LWFA)…

J-PET is a detector optimized for registration of photons from the electron-positron annihilation via plastic scintillators where photons interact predominantly via Compton scattering. Registration of both primary and scattered photons…

The FCC-ee aims to improve on electroweak precision measurements, with goals of 100 keV on the Z mass and width, and a fraction of MeV on the W mass. Compared to LEP, this implies a much improved knowledge of the centre-of-mass energy when…

Accelerator Physics · Physics 2015-06-03 M. Koratzinos , A. Blondel , E. Gianfelice-Wendt , F. Zimmermann

We describe upgrades to a numerical code which computes synchrotron and inverse-Compton emission from relativistic plasma including full polarization. The introduced upgrades concern scattering kernel which is now capable of scattering the…

High Energy Astrophysical Phenomena · Physics 2022-11-16 M. Moscibrodzka

A novel covariant formalism for the treatment of the transfer and Compton scattering of partially polarized light is presented. This was initially developed to aid in the computation of relativistic corrections to the polarization generated…

Astrophysics · Physics 2016-08-30 Jamie Portsmouth , Edmund Bertschinger

The Compton scattering cross section on the proton has been measured at laboratory angles of 90$^\circ$ and 135$^\circ$ using tagged photons in the energy range 70--100 MeV and simultaneously using untagged photons in the range…

Nuclear Experiment · Physics 2008-11-26 B. E. MacGibbon , G. Garino , M. A. Lucas , A. M. Nathan , G. Feldman , B. Dolbilkin

We calculate polarization phenomena for virtual Compton scattering on protons, at relatively large momentum transfer 1 GeV$^2$ $\le -q^2\le$ 5 GeV$^2$ on the basis of a model for $\gamma^*+ p\to \gamma+p$ with two main contributions:…

Nuclear Theory · Physics 2007-05-23 M. P. Rekalo , E. Tomasi-Gustafsson

We have measured the parity-violating electroweak asymmetry in the elastic scattering of polarized electrons from the proton. The result is A = -15.05 +- 0.98(stat) +- 0.56(syst) ppm at the kinematic point theta_lab = 12.3 degrees and Q^2 =…

Nuclear Experiment · Physics 2010-05-27 HAPPEX collaboration , K. A. Aniol

Electron polarimeters based on Mott scattering are extensively used in different fields in physics such as atomic, nuclear or particle physics. This is because spin-dependent measurements gives additional information on the physical…

Atomic Physics · Physics 2018-02-06 X. Roca-Maza

Some characteristics of the inverse Compton scattering (ICS) model are reviewed. At least the following properties of radio pulsars can be reproduced in the model: core or central emission beam, one or two hollow emission cones, different…

Astrophysics · Physics 2016-01-27 G. J. Qiao , R. X. Xu , J. F. Liu , J. L. Han , B. Zhang

The design, construction and operation of a Compton back-scattering laser polarimeter at the HERA storage ring at DESY are described. The device measures the longitudinal polarization of the electron beam between the spin rotators at the…

We investigate, both theoretically and experimentally, the phenomenon of polarization rotation of a weak, linearly-polarized optical (probe) field in an atomic system with multiple three-level electromagnetically induced transparency (EIT)…

Quantum Physics · Physics 2009-11-13 Shujing Li , Bo Wang , Xudong Yang , Yanxu Han , Hai Wang , Min Xiao , K. C. Peng

Detection of $\gamma$-ray polarization in Positron Emission Tomography (PET) is as yet an unexploited feature that could be used as an additional handle to improve signal-to-background ratio in this imaging modality. The $\gamma$…

Instrumentation and Detectors · Physics 2022-08-17 Siddharth Parashari , Mihael Makek , Tomislav Bokulić , Damir Bosnar , Ana Marija Kožuljević , Zdenka Kuncic , Petar Žugec

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,…

High Energy Physics - Phenomenology · Physics 2009-11-10 Thomas G. Rizzo