The Compton effect on relativistic electrons and the possibility of obtaining high energy beams

Arutyunian, F.R.; Tumanian, V.A.

doi:10.1016/0031-9163(63)90351-2

Cited by 242 publications

(118 citation statements)

References 0 publications

Supporting

Mentioning

116

Contrasting

Order By: Relevance

“…The latter produces an intense monochromatic gamma-ray beam with small angular divergence (<2 × 10 −4 rad) [4,5]. Methylal ((OCH 3 ) 2 CH 2 ) and hexane (C 6 H 14 ), at a pressure of a few Torr, serve as the filling gases for operation of the MWPC.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Active Oxygen Target for Studies in Nuclear Astrophysics with Laser Compton Backscattered γ-ray Beams

et al. 2018

View full text Add to dashboard Cite

An active target is being developed to be used in low-energy nuclear astrophysics experiments. It is a position-and time-sensitive detector system based on the low-pressure Multi Wire Proportional Chamber (MWPC) technique. Methylal ((OCH 3 ) 2 CH 2 ), at a pressure of a few Torr, serves as the working gas for MWPC operation, and in addition, the oxygen atoms of the methylal molecules serve as an experimental target. The main advantage of this new target detector system is that it has high sensitivity to the low-energy, highly-ionizing particles produced after photodisintegration of 16 O and insensitivity to γ-rays and minimum ionizing particles. This allows users to detect only the products of the nuclear reaction of interest. The threshold energies for detection of α particles and 12 C nuclei are about 50 keV and 100 keV, respectively. The main disadvantage of this detector is the small target thickness, which is around a few tens of µg/cm 2 . However, reasonable luminosity can be achieved by using a multimodule detector system and an intense, Laser Compton Backscattered (LCB) γ-ray beam. This paper summarizes the architecture of the active target and reports test results of the prototype detector. The tests investigated the timing and position resolutions of 30 × 30 mm 2 low-pressure MWPC units using an α-particle source. The possibility of measuring the 16 O(γ, α) 12 C cross-section in the 8-10 MeV energy region by using a LCB γ-ray beam is also discussed. A measurement of the 16 O(γ, α) 12 C cross-section will enable the reaction rate of 12 C(α, γ) 16 O to be determined with significantly improved precision compared to previous experiments.

show abstract

Section: Methodsmentioning

confidence: 99%

“…One is based on the bubble chamber technique and a bremsstrahlung photon beam [3]; the other employs an Optical Time Projection Chamber (O-TPC) [4] and a Laser Compton Backscattered (LCB) γ-ray beam [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Active Oxygen Target for Studies in Nuclear Astrophysics with Laser Compton Backscattered γ-ray Beams

et al. 2018

View full text Add to dashboard Cite

show abstract

“…There are many different approaches for the generation of femtosecond x-ray pulses [1], one of them being Thomson scattering (TS) [2] an intense laser off an intense electron beam [3]- [15]. The first demonstration of the generation of sub-picosecond duration x-ray pulses using 90 • TS was implemented at the Beam Test Facility of the Advanced Light Source at Lawrence Berkeley National Laboratory (LBNL) [7]- [9].…”

Section: Introductionmentioning

confidence: 99%

Femtosecond x-rays from Thomson scattering using laser wakefield accelerators

Catravas

Esarey

Leemans

2001

Meas. Sci. Technol.

View full text Add to dashboard Cite

The possibility of producing femtosecond x-rays through Thomson scattering high power laser beams off laser wakefield generated relativistic electron beams is discussed. The electron beams are produced with either a self-modulated laser wakefield accelerator (SM-LWFA) or through a standard laser wakefield accelerator (LWFA) with optical injection. For a SM-LWFA (LWFA) produced electron beam, a broad (narrow) energy distribution is assumed, resulting in X-ray spectra that are broadband (monochromatic). Designs are presented for 3-100 fs X-ray pulses and the expected flux and brightness of these sources are compared.

show abstract

“…The phenomenon that the cross section for γ + e → γ + e exhibits a sharp peak in backward direction (i.e. the final photon going into the direction of the initial electron) can be used to create intense beams of high energy photons for experiments in material science, nuclear and particle physics [14,15]. Typically ∼ eV photons from an intense laser beam are accelerated to ∼ GeV energies through back-scattering from an electron beam of large energy.…”

mentioning

confidence: 99%

Jet-Tagged Back-Scattering Photons for Quark Gluon Plasma Tomography

Fries

Srivastava

2013

Nuclear Physics A

View full text Add to dashboard Cite

Direct photons are important probes for quark gluon plasma created in high energy nuclear collisions. Various sources of direct photons in nuclear collisions are known, each of them endowed with characteristic information about the production process. However, it has been challenging to separate direct photon sources through measurements of single inclusive photon spectra and photon azimuthal asymmetry. Here we explore a method to identify photons created from the back-scattering of high momentum quarks off quark gluon plasma. We show that the correlation of back-scattering photons with a trigger jet leads to a signal that should be measurable at RHIC and LHC.Photons and dileptons have long been considered good probes of the hot and dense fireball created in high energy nuclear collisions. This is mostly due to the fact that the probability for particles without color charge to reinteract after their creation is negligible. Here we will mostly focus on photons though many of the arguments are equally valid for virtual photons and the dilepton pairs into which they decay.Many sources of direct photons are known in high energy nuclear collisions: This includes (i) hard initial and fragmentation photons [1], which emerge from high momentum transfer scatterings of partons in the first instance of the collisions, either directly or as bremsstrahlung off quark and gluon jets. These photon sources are also active in collisions of protons. After the initial phase there is a pre-equilibrium phase that can last up to 1 fm/c in which (ii) pre-equilibrium photons can be emitted. The dynamics during the pre-equilibrium phase is not well understood and estimates of photon production under widely different assumptions are available [2,3]. There is ample evidence that eventually an equilibrated quark gluon plasma (QGP) is created in collisions at energies available at the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC). This leads to the emission of (iii) thermal photon radiation [4,5,6,7] which has been used as a thermometer for the hot nuclear matter created in those collisions [8]. As the fireball cools and expands confinement of partons into hadrons sets in. This could lead to (iv) photons from hadronization processes [9]. After hadronization the matter is still hot enough to emit (v) thermal photons from the hadronic phase [4]. Lastly we mention the source of photons that we will be interested in isolating here, (vi) photons from interactions of fast partons in QGP. It has been argued that interactions of fast quarks and gluons with QGP, that lead to energy loss of those partons can also produce photons through Compton scattering, annihilation and bremsstrahlung [10,11,12]. As in the purely electromagnetic sector Compton and annihilation photons in QCD can be emitted in back-scattering kinematics, making them a potentially high-yield source at large momenta. In these proceedings we discuss how these back-scattering

show abstract

The Compton effect on relativistic electrons and the possibility of obtaining high energy beams

Cited by 242 publications

References 0 publications

Active Oxygen Target for Studies in Nuclear Astrophysics with Laser Compton Backscattered γ-ray Beams

Active Oxygen Target for Studies in Nuclear Astrophysics with Laser Compton Backscattered γ-ray Beams

Femtosecond x-rays from Thomson scattering using laser wakefield accelerators

Jet-Tagged Back-Scattering Photons for Quark Gluon Plasma Tomography

Contact Info

Product

Resources

About