Cascade processes in the fields of the axes of aligned single crystals

Baier, V.N.; Katkov, V. M.; Strakhovenko, V. M.

doi:10.1016/0168-583x(87)90514-3

Cited by 25 publications

(6 citation statements)

References 6 publications

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“…An analysis of this process is of evident interest as example of higher order QED process in an oriented crystal. This process is the first step of the electromagnetic cascade developed in a crystal by the incident electron (the cascade processes in oriented crystals was considered in [2], see also Section 20 in [1]), it possesses many important peculiarities which will be discussed below.…”

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confidence: 99%

Electroproduction of electron–positron pair in oriented crystal at high energy

Baier

Katkov

2009

Physics Letters A

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The process of electroproduction of the electron-positron pair by high energy electron in an oriented single crystal is investigated. Two contributions are considered: the direct (one-step) process via the virtual intermediate photon and the cascade (two-step) process when the electron emits the real photon moving in the field of axis and afterwards the photon converts into the pair. The spectrum of created positron (electron) is found. It is shown that the probability of the process is strongly enhanced comparing with the corresponding amorphous medium.

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confidence: 99%

Electroproduction of electron–positron pair in oriented crystal at high energy

Baier

Katkov

2009

Physics Letters A

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“…For very high energies (" ! th ) of initial and created particles, kinetic equations describing the shower development were solved analytically [7]. Though the initial electron energies were high enough in the first experimental investigation [8] of shower formation in crystals, energies of detected particles were too low to allow us the direct comparison with [7].…”

Section: Introductionmentioning

confidence: 99%

Comparison of theory with experiment for positron production from high-energy electrons moving along crystal axes

Baier

Strakhovenko

2002

Phys. Rev. ST Accel. Beams

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Using the approach developed earlier for the description of the electron-photon showers in axially aligned single crystals, some characteristics of the positron yield measured in recent experiments are calculated. Theoretical estimations display a rather good agreement with experimental results obtained using 3 to 10 GeV electrons aligned to the h111i axis of the tungsten crystals. Such comparison verified that the accuracy of our approach is quite sufficient to make a reliable choice for optimal parameters of the positron source using axially aligned crystals for future linear colliders.

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“…The first experimental investigation of such showers has been performed in [1] at very high energy of incident electrons. Corresponding theoretical studies were started with [2] where an analytic solution of the problem was obtained, assuming that energies of all charged particles and photons involved are very high. This limitation was surmounted in [3] by suggesting a specific form of the radiation spectrum at axial alignment and performing corresponding simulations.…”

Section: Introductionmentioning

confidence: 99%

Advantages of axially aligned crystals used in positron production at future linear colliders

Artru

Chehab

Chevallier

et al. 2003

Phys. Rev. ST Accel. Beams

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CAS, ThéorieThe characteristics of the electron-photon showers initiated by 2 to 10 GeV electrons aligned along the ⟨111⟩ axis of tungsten crystals are compared with those for the amorphous tungsten. In this energy range, as known, the positron yield at the optimal target thicknesses is larger in a crystal case only by several percent. However, the amount of the energy deposition in a crystal turns out to be considerably (by 20%–50%) lower than in an amorphous target providing the same positron yield, while the peak energy-deposition density is approximately of the same magnitude in both cases

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Cascade processes in the fields of the axes of aligned single crystals

Cited by 25 publications

References 6 publications

Electroproduction of electron–positron pair in oriented crystal at high energy

Electroproduction of electron–positron pair in oriented crystal at high energy

Comparison of theory with experiment for positron production from high-energy electrons moving along crystal axes

Advantages of axially aligned crystals used in positron production at future linear colliders

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