Relativistic spin-polarized positron beams are indispensable for future electron-positron colliders to test modern high-energy physics theory with high precision.

Ultrarelativistic polarized positron jets via collision of electron and ultraintense laser beams.

Employing a feasible scenario, we show that highly polarized positron beams, with a polarization degree of ζ≈60%, can be produced in a femtosecond timescale, with a small angular divergence, ∼74  mrad, and high density, ∼10^{14}  cm^{-3}.

Polarized Positron Beams via Intense Two-Color Laser Pulses.

Vacancy-type defects in Mg-implanted GaN were probed using monoenergetic positron beams.

Effect of illumination on positron states in wide bandgap semiconductors

Vacancy-type defects in Mg-implanted GaN and an Al2O3/GaN structure were probed using monoenergetic positron beams.

Vacancy-type defects in GaN-based power device structure - defect characterization in ion implanted GaN and Al2O3/GaN -

Positron annihilation γ-ray energy spectroscopy and positron annihilation lifetime spectroscopy (PALS) based on intense pulsed slow positron beams as well as ellipsometric porosimetry (EP) combined with heptane adsorption were utilized to characterize the open porosity/interconnectivity and pore size distribution for the prepared films.

Open Porosity and Pore Size Distribution of Mesoporous Silica Films Investigated by Positron Annihilation Lifetime Spectroscopy and Ellipsometric Porosimetry

In the field of positron annihilation spectroscopy, the investigation of a thin near-surface region, modified with ion implantation, has been usually performed by slow positron beams.

Application of Na-22 positron source to the investigation of ion-implanted iron samples

10.1088/1361-6587/abf80d

For other applications, such as the production and application of intense betatron x-ray radiation, Bremsstrahlung γ-rays and positron beams, the beam’s spectral quality is secondary to the number of electrons produced.

Highly efficient few-cycle laser wakefield electron accelerator

10.1142/s0217751x21420148

The CEPC booster needs to provide electron and positron beams to the collider at different energy with required injection efficiency.

Design study of CEPC lower emittance booster

10.1103/PhysRevD.103.096005

By colliding (polarized) electron or positron beams with proton or ion beams for a range of center-of-mass energies, the EIC will perform key measurements to investigate quantum chromodynamics (QCD) at the intensity frontier.

Self-consistent determination of proton and nuclear PDFs at the Electron Ion Collider

Positron annihilation γ-ray energy spectroscopy and positron annihilation lifetime spectroscopy (PALS) based on intense pulsed slow positron beams as well as ellipsometric porosimetry (EP) combined with heptane adsorption were utilized to characterize the open porosity/interconnectivity and pore size distribution for the prepared films.

Open Porosity and Pore Size Distribution of Mesoporous Silica Films Investigated by Positron Annihilation Lifetime Spectroscopy and Ellipsometric Porosimetry

10.1140/epja/s10050-021-00580-y

Incoherent DVCS processes, in particular the ones with tagging the internal target by measuring slow recoiling nuclei, and the unique possibility offered by positron beams for the investigation of Compton form factors of higher twist, are also briefly addressed.

Deeply virtual Compton scattering off Helium nuclei with positron beams

10.1088/1748-0221/16/08/P08001

Positrons generated from radioisotopes and from bremsstrahlung pair production by means of highly intense accelerator-based positron beams serve as a microstructure probe allowing material characterizations with respect to chemical, mechanical, electrical, and magnetic properties.

A new system for real-time data acquisition and pulse parameterization for digital positron annihilation lifetime spectrometers with high repetition rates

10.4236/JHEPGC.2021.73055

In a previous paper [1] we established the possibility of the advantage of using the bombardment of electron-positron beams to produce commercial electrical energy.

A Prototype Electron-Positron Fusion Reactor

10.1007/S41605-021-00261-W

As the key component for the Higgs operating mode of Circular Electron–Positron Collider (CEPC), the electrostatic–magnetic deflectors are required by the double ring collider to separate the electron and the positron beams horizontally in the RF regions.

Study of electrostatic-magnetic deflector for CEPC

10.1103/PhysRevLett.126.162501

The cross section was extracted from data taken by the OLYMPUS experiment at DESY, in which alternating stored electron and positron beams were scattered from a windowless gaseous hydrogen target.

Measurement of the Charge-Averaged Elastic Lepton-Proton Scattering Cross Section by the OLYMPUS Experiment.

10.1007/S41365-021-00904-Z

The design goal of the positron source is to obtain positron beams with a bunch charge of 3 nC.

System design and measurements of flux concentrator and its solid-state modulator for CEPC positron source

10.1016/J.NME.2021.101022

But for the positron beams from radioactive sources (such as 22Na and 64Cu) with continuous energy spectrum (from 0 to Emax), the depth profile of defects and terminated position of positrons overlap with each other and this fact indicated that defects measurement in materials will be affected by extra defects produced by positrons.

Evaluation of displacement damage in solids induced by fast positrons: Modeling and effect on vacancy measurement

10.1016/j.physletb.2021.136374

Utilizing the energetic electron and positron beams of the ILC, we show that the ILC beam dump experiment can cover the parameter regions which have not been explored before.

Leptophilic gauge bosons at ILC beam dump experiment

10.1103/PhysRevAccelBeams.24.073402

Numerical simulations of the expected performance of a typical mJ-scale kHz laser demonstrate the possibility of generating narrow-band and ultra-short positron beams with a flux exceeding $10^5$ positrons/s, of interest for fast volumetric scanning of materials at high resolution.

Ultrashort, MeV-scale laser-plasma positron source for positron annihilation lifetime spectroscopy

10.1088/1742-6596/1802/2/022075

In this paper, the energy released by collision between electron and positron beams is deduced by theoretical analysis, based on the latest experimental results.

The New Energy Material with Great Potential Positron

We report the observation of charge-neutral MeV electron–positron beams from magnetically collimated laser-driven pair-production experiments.

Magnetically collimated relativistic charge-neutral electron–positron beams from high-power lasers

10.1140/epja/s10050-021-00564-y

Positron beams, both polarized and unpolarized, are identified as essential ingredients for the experimental programs at the next generation of lepton accelerators.

An experimental program with high duty-cycle polarized and unpolarized positron beams at Jefferson Lab

10.1016/J.NIMA.2021.165463

The current design baseline of the FCC-ee injector linac is based on the SuperKEKB scheme, in which the electron and the positron beams share the same linacs with a fixed target configuration on-axis hole for electron beam passage.

Optimized injector schemes for FCC-ee positron production

10.1016/j.physletb.2019.135120

Relativistic spin-polarized positron beams are indispensable for future electron-positron colliders to test modern high-energy physics theory with high precision.

Ultrarelativistic polarized positron jets via collision of electron and ultraintense laser beams.

High-energy positron beams generated via a multiphoton process have recently been observed too.

Gamma photons and electron-positron pairs from ultra-intense laser-matter interaction: A comparative study of proposed configurations

10.18429/JACOW-IPAC2019-MOPTS065

The first part of the injector is a normal conducting S-band Linac with frequency in 2860 MHz and provide electron and positron beams at an energy up to 10 GeV [3, 4].

Alternative Design of CEPC LINAC

10.1140/epjd/e2020-10239-8

In an exemplary case study, we estimate brilliance of radiation emitted in a Crystalline Undulator (CU) LS by available positron beams.

Crystal-based intensive gamma-ray light sources

Polarised electron and positron beams add unique opportunities to the physics reach.

The International Linear Collider: A Global Project

10.1140/epjc/s10052-019-7255-9

The expected experimental precision of the rates and asymmetries in the Future Circular Collider with electron positron beams (FCC-ee) in the centre of the mass energy range 88-365GeV considered for construction in CERN, will be better by a factor 5-200.

QED challenges at FCC-ee precision measurements

Vacancy-type defects in Mg-implanted GaN were probed using monoenergetic positron beams.

Effect of illumination on positron states in wide bandgap semiconductors

10.1103/PHYSREVACCELBEAMS.22.041602

To resolve this problem, we propose a continuous wave (CW) operation of a SC linac shared by electron/positron beams for effective multi-purposes utilization.

Lattice layout and linear optics for sharing superconducting linac

10.1038/s41598-019-41650-y

Monte-Carlo simulations show that near-term high-intensity laser facilities can produce positron beams with high-current, femtosecond-scale duration, and sufficiently low normalised emittance at energies in the GeV range to be injected in further acceleration stages.

Laser-driven high-quality positron sources as possible injectors for plasma-based accelerators

10.1109/ICIPRM.2019.8819019

Vacancy-type defects in Mg-implanted GaN and an Al2O3/GaN structure were probed using monoenergetic positron beams.

Vacancy-type defects in GaN-based power device structure - defect characterization in ion implanted GaN and Al2O3/GaN -

The proposed gradient magnet is suitable for the detection of low flux and/or monoenergetic type electron/positron beams with finite transverse sizes and offers unparalleled advantages for gamma-ray spectroscopy in the intermediate MeV range.

Gradient magnet design for simultaneous detection of electrons and positrons in the intermediate MeV range.

10.1007/S11182-019-01607-0

The process of production of a Higgs boson HSM of the Standard Model (the H , h , and A bosons of the Minimal Supersymmetric Standard Model) and a tt¯$$\overline{tt}$$ heavy fermion pair in arbitrarily polarized electronpositron beams e−e+→HSMtt¯e−e+→Htt¯e−e+→htt¯ande−e+→Att¯$${e}^{-}{e}^{+}\to {H}_{SM}\overline{tt}\left({e}^{-}{e}^{+}\to H\overline{tt},{e}^{-}{e}^{+}\to h\overline{tt}, and\;{e}^{-}{e}^{+}\to A\overline{tt}\right)$$ is investigated.

Measurement of the Coupling Constant of the Higgs Boson with a tt¯$$\overline{tt}$$ Heavy Quark Pair

10.1109/TNS.2019.2920921

To measure the electron and positron beams, picking-up these two different bunches in real time is a notable concern.

High-Speed RF Switch Electronics for Picking Up of Electron–Positron Beam Bunches

10.1103/PhysRevD.100.075006

The dependence of the cross section in both the standard model(SM) and MSSM on the center-of-mass energy is examined by considering the polarizations of the initial electron and positron beams.

Associated production of Higgs boson with a photon at electron-positron colliders

10.1103/PhysRevLett.123.174801

Employing a feasible scenario, we show that highly polarized positron beams, with a polarization degree of ζ≈60%, can be produced in a femtosecond timescale, with a small angular divergence, ∼74  mrad, and high density, ∼10^{14}  cm^{-3}.

Polarized Positron Beams via Intense Two-Color Laser Pulses.

10.1007/S41605-019-0110-6

The CEPC Linac is a normal conducting S-band Linac with frequency of 2860 MHz providing electron and positron beams at an energy up to 10 GeV with 100 Hz repetition frequency.

CEPC positron source design

In the field of positron annihilation spectroscopy, the investigation of a thin near-surface region, modified with ion implantation, has been usually performed by slow positron beams.

Application of Na-22 positron source to the investigation of ion-implanted iron samples

10.1016/j.nima.2018.11.133

To this end, it offers electron/positron beams with user-selectable momenta from 1-6 GeV/c.

The DESY II Test Beam Facility

10.1109/TASC.2019.2896774

In the frame of the compact linear collider project, a high-field short-period superconducting damping wigglers will be required to reduce the emittance of the electron and positron beams.

Power Test of the Second-Generation Compact Linear Collider (CLIC) Nb3Sn Damping Wiggler Short Model

10.1007/978-3-030-31593-1_14

In the present contribution, we present preliminary ideas on the advantage of using positron beams on fixed target in searching for the $$A'$$.

Searching for Light–Dark Matter with Positron Beams

10.1016/B978-0-12-814160-1.00004-6

This chapter provides a basic overview of diffraction methods and their applications to determine the structures of surfaces and two-dimensional atomic layers, focusing on the use of electron and positron beams.

Diffraction: Determination of Atomic Structure

10.3389/fphy.2019.00049

The interaction of such electron beams with either a solid target or the focus of a second high-power laser can result in the generation of high-quality positron beams and MeV-photon beams.

Laser-Wakefield Electron Beams as Drivers of High-Quality Positron Beams and Inverse-Compton-Scattered Photon Beams

The interaction occurring between two counterstreaming rotating electron-positron beams and an inhomogeneous magnetized electron-ion plasma is studied with the focus of research on either positrons or electrons propagating in the direction of the magnetic field.

Interaction of counterstreaming rotating electron-positron beams with inhomogeneous electron-ion plasma