Evidence map›Paper›PMID 27090440›Full record

ArticleScientific reports2016

Intrinsic beam emittance of laser-accelerated electrons measured by x-ray spectroscopic imaging.

G Golovin, S Banerjee, C Liu, S Chen, J Zhang, B Zhao, P Zhang, M Veale, M Wilson, P Seller and 1 more

Abstract read
In one paragraph

Article in Scientific reports, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

6 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

11 authors.

G GolovinDepartment of Physics and Astronomy, University of Nebraska, Lincoln NE 68588, USA.
S BanerjeeDepartment of Physics and Astronomy, University of Nebraska, Lincoln NE 68588, USA.
C LiuDepartment of Physics and Astronomy, University of Nebraska, Lincoln NE 68588, USA.
S ChenDepartment of Physics and Astronomy, University of Nebraska, Lincoln NE 68588, USA.
J ZhangDepartment of Physics and Astronomy, University of Nebraska, Lincoln NE 68588, USA.
B ZhaoDepartment of Physics and Astronomy, University of Nebraska, Lincoln NE 68588, USA.
P ZhangDepartment of Physics and Astronomy, University of Nebraska, Lincoln NE 68588, USA.
M VealeScience and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Science &Innovation Campus, Didcot OX11 0QX, UK.
M WilsonScience and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Science &Innovation Campus, Didcot OX11 0QX, UK.
P SellerScience and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Science &Innovation Campus, Didcot OX11 0QX, UK.
D UmstadterDepartment of Physics and Astronomy, University of Nebraska, Lincoln NE 68588, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The recent combination of ultra-intense lasers and laser-accelerated electron beams is enabling the development of a new generation of compact x-ray light sources, the coherence of which depends directly on electron beam emittance. Although the emittance of accelerated electron beams can be low, it can grow due to the effects of space charge during free-space propagation. Direct experimental measurement of this important property is complicated by micron-scale beam sizes, and the presence of intense fields at the location where space charge acts. Reported here is a novel, non-destructive, single-shot method that overcame this problem. It employed an intense laser probe pulse, and spectroscopic imaging of the inverse-Compton scattered x-rays, allowing measurement of an ultra-low value for the normalized transverse emittance, 0.15 (±0.06) π mm mrad, as well as study of its subsequent growth upon exiting the accelerator. The technique and results are critical for designing multi-stage laser-wakefield accelerators, and generating high-brightness, spatially coherent x-rays.

Identifiers

PMID27090440
PMCPMC4835856

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.