## Firstly, the evolution of defects caused by H e + irradiation is analyzed by using slow positron beam Doppler broadening spectroscopy (DBS) in positron annihilation spectroscopy technology (PAS).

The investigation of distribution on size and concentration of helium bubbles in Y-bearing ODS steel using by SAXS and GIXRD

## In this paper, Positron Annihilation Spectroscopy (PAS) with a scanning positron beam was applied to detect crystallographic defects and changes of the microstructure of friction stir welds.

Characterization of the microstructure in friction stir welds of EN AW-2219 using coincident Doppler-broadening spectroscopy

## We demonstrate the use of an EJ-309 scintillator (high flashpoint and low vapor pressure variant) to acquire single-shot positron annihilation lifetime spectroscopy spectra using a trap-based positron beam.

Single-shot positron annihilation lifetime spectroscopy using a liquid scintillator

## 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

## The Doppler broadening (DB) measurements were carried out using a slow-positron beam and combined with the conventional positron lifetime spectroscopy and electron microscopy.

Porosity in Ce4+ and Mg2+ doped zirconia nanomaterials

## Investigations of defects and their spatial distribution in Bi irradiated with 167 MeV Xe26+ ions of different doses have been performed using conventional positron lifetime spectroscopy and variable energy positron beam.

Defects and their range in pure bismuth irradiated with swift Xe ions studied by positron annihilation techniques

## In order to estimate the performance of CVD-W under the fusion environment, the vacancy-type defects and their evolution are investigated by the Doppler-broadening slow positron beam analysis (DB-SPBA) combined with SEM (scanning electron microscope).

Evolution of Defects in CVD-W Irradiated by H/He Neutral Beam Using Positron Annihilation Spectroscopy

## Doppler Broadening Spectroscopy and Coincidence Doppler Broadening Spectroscopy both based on slow positron beam were employed in the current work to characterize the depth distribution and the chemical surroundings of the irradiation-induced defects.

The influence of rhenium addition on the distribution of vacancy-type defects in tungsten

## NET Nature of problem: The program enables the analysis of data obtained from a variable energy positron beam.

Analysis of positron profiling data using e+DSc computer code

## Detailed studies of structural and phase state and defect structure of Zr/Nb NMC were performed using methods of transmission electron microscopy, X-ray structural analysis, glow discharge optical emission spectrometry, and the Doppler broadening spectroscopy using variable energy positron beam.

First-Principles Calculations and Experimental Study of H+-Irradiated Zr/Nb Nanoscale Multilayer System

## A polarized positron beam at Jefferson Lab would present a unique opportunity to make the first measurement of positron polarization transfer, and comparison with electron-scattering data would place valuable constraints on hard TPE.

Polarization transfer in $$\varvec{e}^+p \rightarrow e^+ \varvec{p}$$ scattering using the Super BigBite Spectrometer

## A novel scheme is proposed for generating a polarized positron beam via multiphoton Breit-Wheeler process during the collision of a 10 GeV, pC seeding electron beam with the other 1 GeV, nC driving electron beam.

Generation of polarized positron beams via collisions of ultrarelativistic electron beams

## 5 MHz and 150 MHz and initial test results of electron beam trials of a pulsed positron beam line being developed at BARC, Mumbai are presented in this paper.

Design and development of radio frequency system for pulse positron low energy beam and its electron beam trials

## The pulsed source is generated by the charge-exchange reaction between Rydberg positronium atoms—produced via the injection of a pulsed positron beam into a nanochanneled Si target, and excited by laser pulses—and antiprotons, trapped, cooled and manipulated in electromagnetic traps.

Pulsed production of antihydrogen

## The PAS facility provides an intense positron beam reaching 6 × 108 e+/s, which drives two spectrometers; the e+-PAS and the Ps-PAS, used for studies of defects in thin film materials.

FACILITIES FOR NANO MATERIALS EXAMINATION AT THE PULSTAR REACTOR

## The intense positron beam user facility at the PULSTAR reactor of the North Carolina State University has undergone recent upgrades to address issues caused by radiation damage over the years to the Tungsten moderator and the main beam structure.

The upgraded intense positron beam facility at the PULSTAR reactor

## Compton scattering of gamma rays propagating in a pair plasma can drive the formation of a relativistic electron positron beam.

Compton-driven beam formation and magnetization via plasma microinstabilities

## 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

## 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 -

## Firstly, the evolution of defects caused by H e + irradiation is analyzed by using slow positron beam Doppler broadening spectroscopy (DBS) in positron annihilation spectroscopy technology (PAS).

The investigation of distribution on size and concentration of helium bubbles in Y-bearing ODS steel using by SAXS and GIXRD

## The crystal structure, morphology, microscopic defects and optical properties of the ZnSe films were characterized by XRD, SEM, Raman spectroscopy, UV–visible spectrophotometer and slow positron beam Doppler broadening spectroscopy, respectively.

Investigation on structural and optical properties of ZnSe thin films prepared by selenization

## We further show that using electron/positron beam polarizations can significantly improve the signal sensitivities.

Probing the Scale of New Physics in the $ZZ\gamma$ Coupling at $e^+e^-$ Colliders

## Further, the realistic electron and positron beam polarization are taken into account to measure the NC parameters.

Inferring the covariant Θ-exact noncommutative coupling in the top quark pair production at linear colliders

## 5 MHz and 150 MHz and initial test results of electron beam trials of a pulsed positron beam line being developed at BARC, Mumbai are presented in this paper.

Design and development of radio frequency system for pulse positron low energy beam and its electron beam trials

## In this work, the progress made by the positron group from ELI-NP in the design of a new slow positron beam line is summarized.

An overview of the design of ELIPS-A new slow positron beam line

## However, microstructural defects induced by ion implantation can be effectively investigated using various spectroscopic techniques, including slow-positron beam spectroscopy.

On the Limitations of Positron Annihilation Spectroscopy in the Investigation of Ion-Implanted FeCr Samples

## Ion-irradiated U(Al,Si)3 intermetallide, as an example of compounds with significantly different atomic masses of constituting atoms, was studied by slow positron beam spectroscopy in order to clarify the nature of defects accompanying the process of the ion-induced disordering of this material.

Formation of heavy clusters in ion-irradiated compounds

10.1007/JHEP09(2021)183

## We study capability of the ILC beam dump experiment to search for new physics, comparing the performance of the electron and positron beam dumps.

New physics searches at the ILC positron and electron beam dumps

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

10.1140/epja/s10050-021-00524-6

## We discuss two complementary strategies to search for light dark matter (LDM) exploiting the positron beam possibly available in the future at Jefferson Laboratory.

Light dark matter searches with positrons

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

10.1007/s10765-021-02913-x

## In the Low EMittance Muon Accelerator concept a 45 GeV positron beam, stored in an accumulation ring with high energy acceptance and low angular divergence, is extracted and driven to a target system in order to produce muon pairs near the kinematic threshold.

Theoretical Modeling for the Thermal Stability of Solid Targets in a Positron-Driven Muon Collider

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

10.1016/J.NIMA.2021.165700

## Beam pipe, which lies at the centre of the second-generation Beijing Electron Positron Collider (BEPC II) and its detector Beijing Spectrometer III (BES III), is made of beryllium and the electron–positron beam collision occurs in it.

Effect of pre-irradiation on corrosion performance of beryllium in BEPC II/BES III and CEPC beam pipe

10.1142/s0217751x21420136

## 1 GeV damping ring is used to reduce the transverse emittance of positron beam.

R&D of CEPC injector linac

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.

10.1103/physrevresearch.3.043063

## Here we show that the preservation of beam quality can be compromised in a plasma wakefield loaded with a positron beam, and a trade-off between energy efficiency and beam quality needs to be found.

Efficiency and beam quality for positron acceleration in loaded plasma wakefields

## However, microstructural defects induced by ion implantation can be effectively investigated using various spectroscopic techniques, including slow-positron beam spectroscopy.

On the Limitations of Positron Annihilation Spectroscopy in the Investigation of Ion-Implanted FeCr Samples

10.1140/epja/s10050-021-00508-6

## A high precision proton radius measurement could be performed in Hall B at Jefferson Lab with a positron beam and the calorimeter based setup of the PRad experiment.

Elastic positron–proton scattering at low Q$$^2$$

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

10.1088/1742-6596/1802/2/022075

## 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

10.1103/physrevlett.127.174801

## We show that after a short propagation distance, an asymmetric electron beam drives a stable wakefield in a hollow plasma channel that can be both accelerating and focusing for a positron beam.

High Efficiency Uniform Wakefield Acceleration of a Positron Beam Using Stable Asymmetric Mode in a Hollow Channel Plasma

10.1142/s0217751x21420069

## 1 GeV ring and two transport lines is introduced in CEPC linac in order to reduce the transverse emittance of positron beam at the end of linac and hence reduce the beam loss in the booster.

Design and beam dynamics of CEPC damping ring system

## 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

10.1103/PhysRevE.103.013206

## These characteristic signals are attributed to the inverse two-plasmon decay of the counterpropagating monochromatic plasma waves which are excited by the energetic electrons and the positron beam accelerated by the laser.

High-order harmonic generation in an electron-positron-ion plasma.

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

10.18429/JACOW-IPAC2019-MOPTS065

## The baseline design of CEPC Linac is a normal conducting S-band linear accelerator with frequency in 2860 MHz, which can provide electron and positron beam at an energy up to 10 GeV and bunch charge up to 3 nC.

Alternative Design of CEPC LINAC

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

The International Linear Collider: A Global Project

10.1016/j.nimb.2019.09.036

## Temperature rises of a reactor-based slow-positron beamline at Kyoto University Research Reactor (KUR) were measured during reactor operation and solenoid-coil excitation.

Slow-positron beamline temperature rise reduction at Kyoto University Research Reactor

10.1088/1674-1137/44/6/063106

## We further show that using electron/positron beam polarizations can significantly improve the signal sensitivities.

Probing the Scale of New Physics in the $ZZ\gamma$ Coupling at $e^+e^-$ Colliders

10.18429/JACOW-LINAC2018-THPO001

## The primary purpose of CEPC damping ring is to reduce the transverse phase spaces of positron beam to suitably small value at the beginning of linac and hence reduce the beam loss in the booster.

Design Study on CEPC Positron Damping Ring System

10.3103/S1062873819050071

## The design concept of the system is discussed, along with the chosen engineering solutions and some experimental results obtained during the operation of the system prototype using a positron beam with energies of 100–300 MeV from the PAKHRA S-25R synchrotron at the Lebedev Physical Institute.

A System for Generating the Trigger Signals of the Spaceborne GAMMA-400 Telescope

10.18429/JACOW-EEFACT2018-TUPAB07

## In the LTR commissioning, the positron beam with high emittance, wide energy spread, and high charge were transported and injected into the DR.

Commissioning of Positron Damping Ring and the Beam Transport for SuperKEKB

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

## 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/JHEP06(2019)108

## Further, the realistic electron and positron beam polarization are taken into account to measure the NC parameters.

Inferring the covariant Θ-exact noncommutative coupling in the top quark pair production at linear colliders

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

10.1016/J.NIMA.2018.10.135

## PADME (Positron Annihilation into Dark Matter Experiment) is an experiment that will search for the production of a dark photon A ′ from the annihilation of a positron beam on a thin diamond target.

Searching for a dark photon with PADME at LNF: status of the active diamond target

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

10.1088/1742-6596/1181/1/012083

## The positron beam with energies 100-300 MeV was used for calibration of prototypes of GAMMA-400 detectors on synchrotron “PAKHRA”.

Additional aperture detectors of gamma-telescope GAMMA-400 calibrations on synchrotron “PAKHRA”: possibility of temporal profiles fractal analysis

10.18429/JACOW-EEFACT2018-TUPAB02

## To achieve the design luminosity, the beam have to be transported to the SuperKEKB main ring with the high bunch charge (4 nC) and low emittance: 40/20 μm for horizontal/vertical electron beam emittance and 100/15 μm for positron beam emittance in Phase 3 final.

Low Emittance Beam Transport for e⁻/e⁺ LINAC

10.1103/PhysRevLett.122.204801

## A relativistic electron-positron beam propagating through a magnetized electron-ion plasma is shown to generate both circularly and linearly polarized synchrotron radiations, which is intrinsically linked with asymmetric energy dissipation of the pair beam during the filamentation instability dynamics in the background plasma.

Polarized Light from the Transportation of a Matter-Antimatter Beam in a Plasma.