Processing of the data of ring transition radiation detectors

Aginian, M. A.; Ispirian, K.A.; Ispiryan, M. K.; Khachatryan, Vitali

doi:10.1016/j.nima.2004.01.029

Cited by 2 publications

(1 citation statement)

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“…Secondly, in principle, PEPPE can be produced also when an electron passes through an amorphous plate, say, simultaneously with production of transition radiation (TR) photons [15]. Due to the proportionality of the TR photon yield to Z 2 , the rate will be enhanced if instead of electrons one uses relativistic heavy ions with high Z values, i.e., beams at RHIC or LHC as in the proposal [16] for ring TRD. As in the above considered case of crystal radiator, in order to separate the production of PEPPE from the background in the case of TR one can measure the polarization of the two entangled photons in directions different from the TR polarization plane made of the direction of the primary particle and emission direction of the TR.…”

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confidence: 99%

Radiation of X-ray entangled photons by high energy electrons

Ispirian

Ispiryan

2010

J. Phys.: Conf. Ser.

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Without developing a correct theory, the rate of the production of entangled photon pairs in the X-ray region by high energy electrons is estimated for experimental parameters used in a few experiments on X-ray parametric down conversion. Taking into account the need for X-ray entangled X-ray photons, it is proposed to begin the experimental study of such mechanism of nonlinear X-ray optics before the launch of the X-ray free electron lasers.The parametric down conversion (PDC) of a "pump" photon with frequency ω p into two photons, a "signal" photon with ω s and an "idler" photon with ω i , in a nonlinear medium, provides two entangled photons. In the optical region, PDC, which is one of the most important processes of the nonlinear X-ray optics, has been theoretically and experimentally studied in many works. PDC can find wide scientific applications in quantum computers, cryptography, teleportation, etc. In X-ray region PDC for the first time has been considered in [1] and observed in [2]. Since the cross section of PDC is small, it has been further experimentally studied only in a few works [3-6] without satisfactory development and comparison between the theory and experiment. The highest event rate observed for the third generation SR sources [4-6] is ~ 0.1 Hz, while the expected one for LCLS and TESLA FELs is 10000 times higher [7]. As the optical, the X-ray PDC semiclassically is interpreted as mixing of the pump photon with a zero point fluctuation photon (ZPF), and the very small X-ray nonlinear susceptibilities are

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