Monte Carlo simulations for the characterization of position-sensitive x-ray detectors dedicated to Compton polarimetry

Weber, G.; Bräuning, H.; Märtin, R.; Spillmann, U.; Stöhlker, Th.

doi:10.1088/0031-8949/2011/t144/014034

Cited by 17 publications

(12 citation statements)

References 9 publications

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“…In the present case we found an escape fraction of approximately 60 % for incident photons with energies above the K threshold of the gold absorbers, which is about 80.7 keV. This finding is in agreement with simulations based on the EGS5 package that was already successfully applied to model the efficiency of semiconductor detectors [42].…”

Section: Quasi-continuous Energy Calibrationsupporting

confidence: 91%

Integration of maXs-type microcalorimeter detectors for high-resolution x-ray spectroscopy into the experimental environment at the CRYRING@ESR electron cooler

Pfäfflein¹,

Bernitt²,

Hahn³

et al. 2022

Preprint

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We report on the first integration of novel magnetic microcalorimeter detectors (MMCs), developed within SPARC (Stored Particles Atomic Physics Research Collaboration), into the experimental environment of storage rings at GSI ‡, Darmstadt, namely at the electron cooler of CRYRING@ESR. Two of these detector systems were positioned at the 0 • and 180 • view ports of the cooler section to obtain high-resolution x-ray spectra originating from a stored beam of hydrogen-like uranium interacting with the cooler electrons. While previous test measurements with microcalorimeters at the accelerator facility of GSI were conducted in the mode of well-established stand-alone operation, for the present experiment we implemented several notable modifications to exploit the full potential of this type of detector for precision x-ray spectroscopy of stored heavy ions. Among these are a new readout system compatible with the multi branch system data acquisition platform of GSI, the synchronization of a quasicontinuous energy calibration with the operation cycle of the accelerator facility, as well as the first exploitation of the maXs detectors' time resolution to apply coincidence conditions for the detection of photons and charge-changed ions.

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Section: Quasi-continuous Energy Calibrationsupporting

confidence: 91%

Integration of maXs-type microcalorimeter detectors for high-resolution x-ray spectroscopy into the experimental environment at the CRYRING@ESR electron cooler

Pfäfflein¹,

Bernitt²,

Hahn³

et al. 2022

Preprint

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“…In general, polarization transfer between charged particles and x-rays is relevant for polarization control of spin-polarized particle beams. Recent experimental studies of polarization transfer are [73][74][75][76] and also theory investigations on this topic have been carried out in [77,78].…”

Section: Introductionmentioning

confidence: 99%

Spin in Compton scattering with pronounced polarization dynamics

Ahrens

Sun

2017

Phys. Rev. A

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We theoretically investigate a scattering configuration in Compton scattering, in which the orientation of the electron spin is reversed and simultaneously, the photon polarization changes from linear polarization into circular polarization. The intrinsic angular momentum of electron and photon are computed along the coincident propagation direction of the incoming and outgoing photon. We find that this intrinsic angular momentum is not conserved in the considered scattering process. We also discuss the generation of entanglement for the considered scattering setup and present an angle dependent investigation of the corresponding differential cross section, Stokes parameters and spin expectation.Comment: 15 pages, 13 figure

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“…1) and a minor contribution caused by random coincidences. Moreover, the polarimeter quality, defined as the ratio of the reconstructed degree of linear polarization and the real incident photon polarization was evaluated by means of a Monte Carlo simulation based on the EGS5 program package, see [28]. Note that these corrections only affect the anisotropy of the scattering distribution, i.e., the degree of polarization, but not its orientation.…”

mentioning

confidence: 99%

Polarization Transfer of Bremsstrahlung Arising from Spin-Polarized Electrons

et al. 2012

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We report on a study of the polarization transfer between transversely polarized incident electrons and the emitted x rays for electron-atom bremsstrahlung. By means of Compton polarimetry we performed for the first time an energy-differential measurement of the complete properties of bremsstrahlung emission related to linear polarization, i.e., the degree of linear polarization as well as the orientation of the polarization axis. For the high-energy end of the bremsstrahlung continuum the experimental results for both observables show a high sensitivity on the initial electron spin polarization and prove that the polarization orientation is virtually independent of the photon energy.

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Monte Carlo simulations for the characterization of position-sensitive x-ray detectors dedicated to Compton polarimetry

Cited by 17 publications

References 9 publications

Integration of maXs-type microcalorimeter detectors for high-resolution x-ray spectroscopy into the experimental environment at the CRYRING@ESR electron cooler

Integration of maXs-type microcalorimeter detectors for high-resolution x-ray spectroscopy into the experimental environment at the CRYRING@ESR electron cooler

Spin in Compton scattering with pronounced polarization dynamics

Polarization Transfer of Bremsstrahlung Arising from Spin-Polarized Electrons

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