Soft x-ray low-pass filter with a square-pore microchannel plate

Cao, Zhurong; Jin, Fengtao; Dong, Jianjun; Yang, Zhenghua; Zhan, Xun; Zheng, Yuan; Zhang, Haiying; Jiang, Shaoen; Ding, Yongkun

doi:10.1364/ol.38.001509

Cited by 15 publications

(7 citation statements)

References 8 publications

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“…Apart from this, we have also calculated the angular distribution of emitted harmonics [refer to Fig. 4] and it is observed that particular harmonics are emitted along specific directions, which in principle is useful to tune the detectors to utilize the radiation of a particular energy [51]. The generation and application of the attosecond pulses is interesting in its own right and in this work, we were able to obtain the attosecond pulses ranging from ∼80-276 as with good spatial and temporal coherence properties, depending on the incident laser intensity.…”

Section: Discussionmentioning

confidence: 99%

Higher harmonics and attosecond pulse generation by laser induced Thomson scattering in atomic clusters

Venkat

Holkundkar

2019

Phys. Rev. Accel. Beams

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The generation of higher harmonics of intense lasers and associated attosecond pulses is a field of contemporary interest which promises a variety of applications ranging from the fundamental to applied sciences. In this work, we have probed the interaction of the intense (≳10 19 W=cm 2 ) 248 nm laser with Deuterium clusters using classical molecular dynamics simulation. The Thomson scattered radiation emitted by the electrons is considered by using standard Liénard-Wiechert potentials. We have studied the angular distribution of the radiation emitted by electrons and observed that the ponderomotive force exerted by these highly intense laser pulses leaves a very distinct signature of the radiated energy along a particular direction, which in principle has its own diagnostic potential to directly measure the intensities of incident laser pulses. Furthermore, the interaction of lasers with intensities ∼10 19 -10 21 W=cm 2 with atomic clusters results in the attosecond burst of energy in form of electromagnetic radiations, which fall under the XUV to soft x-rays regime of electromagnetic spectrum. The parameters of the atomic clusters, e.g., size (number of atoms), atomic species, etc. can be easily controlled experimentally and these in turn, change the number of electrons participating in the interaction process and hence, the properties of Thomson scattered radiation can be tuned accordingly.

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Section: Discussionmentioning

confidence: 99%

Higher harmonics and attosecond pulse generation by laser induced Thomson scattering in atomic clusters

Venkat

Holkundkar

2019

Phys. Rev. Accel. Beams

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“…The MCP transmission in the XUV spectral region has been measured in [19] to be as high as 60% for photon energies from 50 eV to 1.5 keV, reaching the upper limit set by the MCP opening ratio. It is reasonable to assume that the transmission should be the same for even higher energy photons due to their decreasing wavelengths.…”

mentioning

confidence: 88%

“…It is reasonable to assume that the transmission should be the same for even higher energy photons due to their decreasing wavelengths. The measurement in [19] was done by placing an XUV photodiode 1 mm away from the MCP, indicating that the total transmission was measured. However, only the zerothorder transmission is useful for studying ultrafast dynamics.…”

mentioning

confidence: 99%

Suppression of driving laser in high harmonic generation with a microchannel plate

Zhang

Zhao

et al. 2014

Opt. Lett.

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Separating the infrared driving laser from the extreme ultraviolet (XUV) pulses after high-order harmonic generation has been a long-standing difficulty. In this Letter, we propose and demonstrate that the driving laser can be blocked by simply installing a microchannel plate (MCP) into the beam line. In addition to its high damage threshold, the MCP filter also transmits photons over the entire XUV region. This paves the way for attosecond pulse generation with unprecedented bandwidth.

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“…Hence, generating a brilliant spot size is a challenging issue, but extremely important for a large class of experiments. Moreover, the continuously growing demand for low-emittance SR sources and XFELs requires new optical elements capable of focusing or shaping radiation as well as filtering or shifting the energy of the X-ray beam (Cao et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…(Gao & Janssens, 2004). They can also be applied as a condenser in a soft X-ray microscope coupled to a plasma X-ray source (Cao et al, 2013). Furthermore, studies on the propagation of X-ray radiation inside MCPs are particularly interesting for improving the spot stability and for optimizing the characteristics of a soft X-ray beam, e.g.…”

Section: Introductionmentioning

confidence: 99%

Wave propagation and focusing of soft X-rays by spherical bent microchannel plates

Mazuritskiy¹,

Лерер²,

Marcelli³

et al. 2021

J Synchrotron Rad

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Synchrotron radiation sources have been used to study the focusing properties and angular distribution of X-ray radiation at the exit of spherically bent microchannel plates (MCPs). In this contribution it is shown how soft X-ray radiation at energies up to 1.5 keV can be focused by spherically bent MCPs with curvature radii R of 30 mm and 50 mm. For these devices, a focus spot is detectable at a distance between the detector and the MCP of less than R/2, with a maximum focusing efficiency up to 23% of the flux illuminating the MCP. The soft X-ray radiation collected at the exit of microchannels of spherically bent MCPs are analyzed in the framework of a wave approximation. A theoretical model for the wave propagation of radiation through MCPs has been successfully introduced to explain the experimental results. Experimental data and simulations of propagating radiation represent a clear confirmation of the wave channeling phenomenon for the radiation in spherically bent MCPs.

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Soft x-ray low-pass filter with a square-pore microchannel plate

Cited by 15 publications

References 8 publications

Higher harmonics and attosecond pulse generation by laser induced Thomson scattering in atomic clusters

Higher harmonics and attosecond pulse generation by laser induced Thomson scattering in atomic clusters

Suppression of driving laser in high harmonic generation with a microchannel plate

Wave propagation and focusing of soft X-rays by spherical bent microchannel plates

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